LETTER OF TRANSMITTAL
                        TO TENDER SHARES OF COMMON STOCK
              AND $1.85 CUMULATIVE CONVERTIBLE PREFERENCE STOCK OF
                                BIRD CORPORATION
            PURSUANT TO THE OFFER TO PURCHASE DATED JANUARY 16, 1998
                                       BY
                             BI EXPANSION II CORP.
                          A Wholly Owned Subsidiary of
                            CERTAINTEED CORPORATION
                     An Indirect Wholly Owned Subsidiary of
                           COMPAGNIE DE SAINT-GOBAIN
 
  THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT, NEW YORK CITY
       TIME, ON FRIDAY, FEBRUARY 13, 1998, UNLESS THE OFFER IS EXTENDED.
 
                  TO: CHASEMELLON SHAREHOLDER SERVICES, L.L.C.
 
        BY MAIL:            BY OVERNIGHT DELIVERY:             BY HAND:
 
 
 
     P.O. Box 3305            85 Challenger Road       120 Broadway-13th Floor
  South Hackensack, NJ      Mail Drop Reorg. Dept         New York, NY 10271
         07606               Ridgefield Park, NJ              Attention:
       Attention:                   07660                   Reorganization
     Reorganization                                           Department
       Department
 
                                    BY FAX:
 
                                 (201) 329-8936
 
                             CONFIRM BY TELEPHONE:
                                 (201) 296-4860
 
                         DESCRIPTION OF SHARES TENDERED
- --------------------------------------------------------------------------------
  NAME(S) AND ADDRESS(ES) OF REGISTERED    SHARE CERTIFICATE(S) AND SHARE(S)
  HOLDER(S) (PLEASE FILL IN, IF BLANK,   TENDERED (ATTACH ADDITIONAL LIST IF
  EXACTLY AS NAME(S) APPEAR(S) ON SHARE              NECESSARY)
             CERTIFICATE(S))
- --------------------------------------------------------------------------------


                                                             CLASS AND           TOTAL
                                                               SERIES           NUMBER
                                                             OF SHARES         OF SHARES
                                                SHARE       REPRESENTED       REPRESENTED        NUMBER
                                             CERTIFICATE      BY SHARE         BY SHARE         OF SHARES
                                            NUMBER(S)(/1/) CERTIFICATE(S) CERTIFICATE(S)(/1/) TENDERED(/2/)
                                         --------------------------------------------------------------
                                         --------------------------------------------------------------
                                         --------------------------------------------------------------
                                         --------------------------------------------------------------
                                         --------------------------------------------------------------
                                         --------------------------------------------------------------
                                                                                  
                                             TOTAL SHARES OF COMMON STOCK
                                         --------------------------------------------------------------
                                             TOTAL SHARES OF $1.85 CUMULATIVE CONVERTIBLE
                                             PREFERENCE STOCK

 (1) Need not be completed by Book-Entry Stockholders.
 (2) Unless otherwise indicated, it will be assumed that all Shares
     described above are being tendered. See Instruction 4.

 
                                ---------------
 
  DELIVERY OF THIS LETTER OF TRANSMITTAL TO AN ADDRESS, OR TRANSMISSION OF
INSTRUCTIONS VIA A FAX NUMBER, OTHER THAN AS SET FORTH ABOVE DOES NOT
CONSTITUTE A VALID DELIVERY.
 
  THE INSTRUCTIONS ACCOMPANYING THIS LETTER OF TRANSMITTAL SHOULD BE READ
CAREFULLY BEFORE THIS LETTER OF TRANSMITTAL IS COMPLETED.
 
  This Letter of Transmittal is to be used either if certificates for Shares
(as defined below) are to be forwarded herewith or, unless an Agent's Message
(as defined in Section 2 of the Offer to Purchase (as defined below)) is
utilized, if delivery of Shares is to be made by book-entry transfer to an
account maintained by the Depositary at a Book-Entry Transfer Facility (as
defined in and pursuant to the procedures set forth in Section 2 of the Offer
to Purchase). Stockholders who deliver Shares by book-entry transfer are
referred to herein as "Book-Entry Stockholders" and other stockholders are
referred to herein as "Certificate Stockholders". Stockholders whose
certificates for Shares (as defined below) are not immediately available or
who cannot deliver either the certificates for, or a Book-Entry Confirmation
(as defined in Section 2 of the Offer to Purchase) with respect to, their
Shares and all other documents required hereby to the Depositary prior to the
Expiration Date (as defined in Section 1 of the Offer to Purchase) must tender
their Shares in accordance with the guaranteed delivery procedures set forth
in Section 2 of the Offer to Purchase. See Instruction 2. DELIVERY OF
DOCUMENTS TO A BOOK-ENTRY TRANSFER FACILITY DOES NOT CONSTITUTE DELIVERY TO
THE DEPOSITARY.
 
[_] CHECK HERE IF TENDERED SHARES ARE BEING DELIVERED BY BOOK-ENTRY TRANSFER
    MADE TO AN ACCOUNT MAINTAINED BY THE DEPOSITARY WITH A BOOK-ENTRY TRANSFER
    FACILITY AND COMPLETE THE FOLLOWING (ONLY PARTICIPANTS IN A BOOK-ENTRY
    TRANSFER FACILITY MAY DELIVER SHARES BY BOOK-ENTRY TRANSFER):
 
  Name of Tendering Institution _______________________________________________
 
  Check box of Book-Entry Transfer Facility:
 
  [_] The Depository Trust Company
  [_] Philadelphia Depository Trust Company
 
  Account Number ______________________________________________________________
 
  Transaction Code Number _____________________________________________________
 
[_] CHECK HERE IF TENDERED SHARES ARE BEING DELIVERED PURSUANT TO A NOTICE OF
    GUARANTEED DELIVERY PREVIOUSLY SENT TO THE DEPOSITARY AND COMPLETE THE
    FOLLOWING:
 
  Name(s) of Registered Owner(s) ______________________________________________
 
  Date of Execution of Notice of Guaranteed Delivery __________________________
 
  Name of Institution that Guaranteed Delivery ________________________________
 
  If delivered by book-entry transfer check box:
 
  [_] The Depository Trust Company
  [_] Philadelphia Depository Trust Company
 
  Account Number  _____________________________________________________________
 
  Transaction Code Number _____________________________________________________

 
                    NOTE: SIGNATURES MUST BE PROVIDED BELOW
              PLEASE READ THE ACCOMPANYING INSTRUCTIONS CAREFULLY
 
Ladies and Gentlemen:
 
  The undersigned hereby tenders to BI Expansion II Corp., a Massachusetts
corporation (the "Purchaser") and a wholly owned subsidiary of CertainTeed
Corporation, a Delaware corporation which is an indirect wholly owned
subsidiary of Compagnie de Saint-Gobain, a French corporation ("Saint-
Gobain"), the above-described shares of Common Stock, par value $1.00 per
share (the "Common Shares"), of Bird Corporation, a Massachusetts corporation
(the "Company"), and hereby tenders to the Purchaser the above-described
shares of $1.85 Cumulative Convertible Preference Stock, par value $1.00 per
share (the "Preference Shares"), of the Company, upon the terms and subject to
the conditions set forth in the Purchaser's Offer to Purchase dated January
16, 1998 (the "Offer to Purchase"), and this Letter of Transmittal (which,
together with any amendments or supplements thereto or hereto, collectively
constitute the "Offer"), receipt of which is hereby acknowledged. The Common
Shares and the Preference Shares are collectively referred to as the "Shares".
 
  Upon the terms of the Offer, subject to, and effective upon, acceptance for
payment of, and payment for, the Shares tendered herewith in accordance with
the terms of the Offer, the undersigned hereby sells, assigns and transfers
to, or upon the order of, the Purchaser all right, title and interest in and
to all the Shares that are being tendered hereby (and any and all other Shares
or other securities or rights issued or issuable in respect thereof on or
after January 12, 1998), and irrevocably constitutes and appoints ChaseMellon
Shareholder Services, L.L.C. (the "Depositary"), the true and lawful agent and
attorney-in-fact of the undersigned, with full power of substitution (such
power of attorney being deemed to be an irrevocable power coupled with an
interest), to the full extent of the undersigned's rights with respect to such
Shares (and any such other Shares or securities or rights), (a) to deliver
certificates for such Shares (and any such other Shares or securities or
rights) or transfer ownership of such Shares (and any such other Shares or
securities or rights) on the account books maintained by a Book-Entry Transfer
Facility together, in any such case, with all accompanying evidences of
transfer and authenticity to, or upon the order of, the Purchaser, (b) to
present such Shares (and any such other Shares or securities or rights) for
transfer on the Company's books and (c) to receive all benefits and otherwise
exercise all rights of beneficial ownership of such Shares (and any such other
Shares or securities or rights), all in accordance with the terms of the
Offer.
 
  The undersigned hereby represents and warrants that the undersigned has full
power and authority to tender, sell, assign and transfer the tendered Shares
(and any and all other Shares or other securities or rights issued or issuable
in respect of such Shares on or after January 12, 1998) and, when the same are
accepted for payment by the Purchaser, the Purchaser will acquire good title
thereto, free and clear of all liens, restrictions, claims and encumbrances,
and the same will not be subject to any adverse claim. The undersigned will,
upon request, execute any additional documents deemed by the Depositary or the
Purchaser to be necessary or desirable to complete the sale, assignment and
transfer of the tendered Shares (and any and all such other Shares or
securities or rights).
 
  All authority conferred or agreed to be conferred pursuant to this Letter of
Transmittal shall be binding upon the successors, assigns, heirs, executors,
administrators and legal representatives of the undersigned and shall not be
affected by, and shall survive, the death or incapacity of the undersigned.
Except as stated in the Offer to Purchase, this tender is irrevocable.
 
  The undersigned hereby irrevocably appoints George B. Amoss, Bradford C.
Mattson and John R. Mesher, and each of them, and any other designees of the
Purchaser, the attorneys-in-fact and proxies of the undersigned, each with
full power of substitution, to vote at any annual, special or adjourned
meeting of the Company's stockholders or otherwise in such manner as each such
attorney-in-fact and proxy or his or her substitute shall in his or her sole
discretion deem proper with respect to, to execute any written consent
concerning any matter as each such attorney-in-fact and proxy or his or her
substitute shall in his or her sole discretion deem proper with respect to,
and to otherwise act as each such attorney-in-fact and proxy or his or her
substitute shall in his or her sole discretion deem proper with respect to,
the Shares tendered hereby that have been accepted for payment by the
Purchaser prior to the time any such action is taken and with respect to which
the undersigned is entitled to vote (and any and all other Shares or other
securities or rights issued or issuable in respect of such Shares on or after
January 12, 1998). This appointment is effective when, and only to the extent
that, the Purchaser accepts for payment such Shares as provided in the Offer
to Purchase. This power of attorney and proxy are irrevocable and

 
are granted in consideration of the acceptance for payment of such Shares in
accordance with the terms of the Offer. Upon such acceptance for payment, all
prior powers of attorney, proxies and consents given by the undersigned with
respect to such Shares (and any such other Shares or securities or rights)
will, without further action, be revoked and no subsequent powers of attorney,
proxies, consents or revocations may be given (and, if given, will not be
deemed effective) by the undersigned.
 
  The undersigned understands that the valid tender of Shares pursuant to any
of the procedures described in Section 2 of the Offer to Purchase and in the
Instructions hereto will constitute a binding agreement between the
undersigned and the Purchaser upon the terms and subject to the conditions of
the Offer.
 
  Unless otherwise indicated herein under "Special Payment Instructions",
please issue the check for the purchase price and/or return any certificates
for Shares not tendered or accepted for payment in the name(s) of the
registered holder(s) appearing under "Description of Shares Tendered".
Similarly, unless otherwise indicated under "Special Delivery Instructions",
please mail the check for the purchase price and/or return any certificates
for Shares not tendered or accepted for payment (and accompanying documents,
as appropriate) to the address(es) of the registered holder(s) appearing under
"Description of Shares Tendered". In the event that both "Special Delivery
Instructions" and "Special Payment Instructions" are completed, please issue
the check for the purchase price and/or return any certificates for Shares not
tendered or accepted for payment (and any accompanying documents, as
appropriate) in the name of, and deliver such check and/or return such
certificates (and any accompanying documents, as appropriate) to, the person
or persons so indicated. Please credit any Shares tendered herewith by book-
entry transfer that are not accepted for payment by crediting the account at
the Book-Entry Transfer Facility designated above. The undersigned recognizes
that the Purchaser has no obligation pursuant to "Special Payment
Instructions" to transfer any Shares from the name of the registered holder
thereof if the Purchaser does not accept for payment any of the Shares so
tendered.

 
[_]CHECK HERE IF ANY OF THE CERTIFICATES REPRESENTING SHARES THAT YOU OWN HAVE
  BEEN LOST OR DESTROYED AND SEE INSTRUCTION 11.
 
Number, class and series of Shares represented by the lost or destroyed
certificates:__________________________________________________________________
 
 
 SPECIAL PAYMENT INSTRUCTIONS (SEE           SPECIAL DELIVERY INSTRUCTIONS
      INSTRUCTIONS 5, 6 AND 7)               (SEE INSTRUCTIONS 5, 6 AND 7)
 
 
  To be completed ONLY if certifi-          To be completed ONLY if certifi-
 cates for Shares not tendered or          cates for Shares not tendered or
 not accepted for payment and/or           not accepted for payment and/or
 the check for the purchase price          the check for the purchase price
 of Shares accepted for payment            of Shares accepted for payment
 are to be issued in the name of           are to be sent to someone other
 someone other than the under-             than the undersigned, or to the
 signed.                                   undersigned at an address other
                                           than that above.
 
 
 Issue  [_] Check
                                           Mail  [_] Check
 
 
        [_] Certificate(s) to:
                                                 [_] Certificates to:
 
 Name _____________________________        Name _____________________________
           (PLEASE PRINT)                            (PLEASE PRINT)
 Address __________________________        Address __________________________
 __________________________________        __________________________________
         (INCLUDE ZIP CODE)                        (INCLUDE ZIP CODE)
 __________________________________        __________________________________
    (EMPLOYER IDENTIFICATION OR               (EMPLOYER IDENTIFICATION OR
      SOCIAL SECURITY NUMBER)                   SOCIAL SECURITY NUMBER)

 
                                   SIGN HERE
                   (ALSO COMPLETE SUBSTITUTE FORM W-9 BELOW)
            -------------------------------------------------------
            -------------------------------------------------------
                       (SIGNATURE(S) OF STOCKHOLDER(S))
            Dated:          , 1998
 
 (Must be signed by registered holder(s) as name(s) appear(s) on the
 certificate(s) for the Shares or on a security position listing or by
 person(s) authorized to become registered holder(s) by certificates and
 documents transmitted herewith. If signature is by trustees, executors,
 administrators, guardians, attorneys-in-fact, officers of corporations or
 others acting in a fiduciary or representative capacity, please provide the
 following information and see Instruction 5.)
 
            Name(s)________________________________________________
                  ________________________________________________
                                (PLEASE PRINT)
 
            Capacity (Full title) _________________________________
 
            Address________________________________________________
                  ________________________________________________
                              (INCLUDE ZIP CODE)
 
            Daytime Area Code and Telephone No. ___________________
 
            Employer Identification or
            Social Security Number ________________________________
                                          (SEE SUBSTITUTE FORM W-9)
 
                           GUARANTEE OF SIGNATURE(S)
                    (IF REQUIRED--SEE INSTRUCTIONS 1 AND 5)
 
            Authorized Signature __________________________________
 
            Name __________________________________________________
                                (PLEASE PRINT)
            Name of Firm __________________________________________
 
            Address________________________________________________
                  ________________________________________________
                              (INCLUDE ZIP CODE)
 
            Daytime Area Code and Telephone No. ___________________
 
            Dated: _________________________________________ , 1998
 
 
 

 
                                 INSTRUCTIONS
             FORMING PART OF THE TERMS AND CONDITIONS OF THE OFFER
 
  1. GUARANTEE OF SIGNATURES. No signature guarantee is required on this
Letter of Transmittal (a) if this Letter of Transmittal is signed by the
registered holder(s) (which term, for purposes of this Section, includes any
participant in any of the Book-Entry Transfer Facilities' systems whose name
appears on a security position listing as the owner of the Shares) of Shares
tendered herewith, unless such registered holder(s) has completed either the
box entitled "Special Payment Instructions" or the box entitled "Special
Delivery Instructions" on this Letter of Transmittal or (b) if such Shares are
tendered for the account of a financial institution (including most commercial
banks, savings and loan associations and brokerage houses) that is a member
firm of a national securities exchange registered with the Securities and
Exchange Commission or the National Association of Securities Dealers, Inc.
(the "NASD"), or a commercial bank or trust company having an office or
correspondent in the United States (an "Eligible Institution"). In all other
cases, all signatures on this Letter of Transmittal must be guaranteed by an
Eligible Institution. See Instruction 5.
 
  2. REQUIREMENTS OF TENDER. This Letter of Transmittal is to be completed by
stockholders either if certificates are to be forwarded herewith or, unless an
Agent's Message (as defined below) is utilized, if delivery of Shares is to be
made pursuant to the procedures for book-entry transfer set forth in Section 2
of the Offer to Purchase. For a stockholder validly to tender Shares pursuant
to the Offer, either (a) a Letter of Transmittal (or fax thereof), properly
completed and duly executed, together with any required signature guarantees,
or, in the case of a book-entry transfer, an Agent's Message, and any other
required documents, must be received by the Depositary at one of its addresses
set forth herein prior to the Expiration Date (as defined in Section 1 of the
Offer to Purchase) and either certificates for tendered Shares must be
received by the Depositary at one of such addresses or Shares must be
delivered pursuant to the procedures for book-entry transfer set forth herein
(and a Book-Entry Confirmation (as defined in the Offer to Purchase) received
by the Depositary), in each case prior to the Expiration Date, or (b) the
tendering stockholder must comply with the guaranteed delivery procedures set
forth below and in Section 2 of the Offer to Purchase.
 
  Stockholders whose certificates for Shares are not immediately available or
who cannot deliver their certificates and all other required documents to the
Depositary or complete the procedures for book-entry transfer prior to the
Expiration Date may tender their Shares by properly completing and duly
executing the Notice of Guaranteed Delivery pursuant to the guaranteed
delivery procedures set forth in Section 2 of the Offer to Purchase. Pursuant
to such procedures, (a) such tender must be made by or through an Eligible
Institution, (b) a properly completed and duly executed Notice of Guaranteed
Delivery, substantially in the form provided by the Purchaser, must be
received by the Depositary prior to the Expiration Date and (c) the
certificates for all tendered Shares in proper form for transfer (or a Book-
Entry Confirmation with respect to all such Shares), together with a Letter of
Transmittal (or fax thereof), properly completed and duly executed, with any
required signature guarantees, or, in the case of a book-entry transfer, an
Agent's Message, and any other required documents, must be received by the
Depositary within three trading days after the date of execution of such
Notice of Guaranteed Delivery as provided in Section 2 of the Offer to
Purchase. A "trading day" is any day on which the Nasdaq National Market
operated by the NASD is open for business.
 
  "Agent's Message" means a message transmitted by a Book-Entry Transfer
Facility to, and received by, the Depositary and forming a part of a Book-
Entry Confirmation that states that such Book-Entry Transfer Facility has
received an express acknowledgement from the participant in such Book-Entry
Transfer Facility tendering the Shares that such participant has received and
agrees to be bound by the terms of the Letter of Transmittal and that the
Purchaser may enforce such agreement against such participant.
 
  THE METHOD OF DELIVERY OF SHARES, THE LETTER OF TRANSMITTAL AND ALL OTHER
REQUIRED DOCUMENTS, INCLUDING DELIVERY THROUGH ANY BOOK-ENTRY TRANSFER
FACILITY, IS AT THE ELECTION AND RISK OF THE TENDERING STOCKHOLDER. SHARES
WILL BE DEEMED DELIVERED ONLY WHEN ACTUALLY RECEIVED BY THE DEPOSITARY
(INCLUDING, IN THE CASE OF A BOOK-ENTRY TRANSFER, BY BOOK-ENTRY CONFIRMATION).
IF DELIVERY IS BY MAIL, REGISTERED MAIL WITH RETURN RECEIPT REQUESTED,
PROPERLY INSURED, IS RECOMMENDED. IN ALL CASES, SUFFICIENT TIME SHOULD BE
ALLOWED TO ENSURE TIMELY DELIVERY.
 
  No alternative, conditional or contingent tenders will be accepted and no
fractional Shares will be purchased. All tendering stockholders, by execution
of this Letter of Transmittal (or fax hereof), waive any right to receive any
notice of the acceptance of their Shares for payment.

 
  3. INADEQUATE SPACE. If the space provided herein is inadequate, the
certificate numbers and/or the number of Shares should be listed on a separate
schedule attached hereto.
 
  4. PARTIAL TENDERS (APPLICABLE TO CERTIFICATE STOCKHOLDERS ONLY). If fewer
than all the Shares evidenced by any certificate submitted are to be tendered,
fill in the number of Shares that are to be tendered in the box entitled
"Number of Shares Tendered". In any such case, new certificate(s) for the
remainder of the Shares that were evidenced by the old certificate(s) will be
sent to the registered holder, unless otherwise provided in the appropriate
box on this Letter of Transmittal, as soon as practicable after the acceptance
for payment of, and payment for, the Shares tendered herewith. All Shares
represented by certificates delivered to the Depositary will be deemed to have
been tendered unless otherwise indicated.
 
  5. SIGNATURES ON LETTER OF TRANSMITTAL, STOCK POWERS AND ENDORSEMENTS. If
this Letter of Transmittal is signed by the registered holder of the Shares
tendered hereby, the signature must correspond with the name as written on the
face of the certificate(s) without any change whatsoever.
 
  If any of the Shares tendered hereby are owned of record by two or more
joint owners, all such owners must sign this Letter of Transmittal.
 
  If any tendered Shares are registered in different names on several
certificates, it will be necessary to complete, sign and submit as many
separate Letters of Transmittal as there are different registrations of
certificates.
 
  If this Letter of Transmittal or any certificates or stock powers are signed
by trustees, executors, administrators, guardians, attorneys-in-fact, officers
of corporations or others acting in a fiduciary or representative capacity,
such persons should so indicate when signing, and proper evidence satisfactory
to the Purchaser of their authority so to act must be submitted.
 
  When this Letter of Transmittal is signed by the registered owner(s) of the
Shares listed and transmitted hereby, no endorsements of certificates or
separate stock powers are required unless payment is to be made to, or
certificates for Shares not tendered or accepted for payment are to be issued
to, a person other than the registered owner(s). Signatures on such
certificates or stock powers must be guaranteed by an Eligible Institution.
 
  If this Letter of Transmittal is signed by a person other than the
registered owner(s) of the certificates listed, the certificates must be
endorsed or accompanied by appropriate stock powers, in either case signed
exactly as the name or names of the registered owner or owners appear on the
certificates. Signatures on such certificates or stock powers must be
guaranteed by an Eligible Institution.
 
  6. STOCK TRANSFER TAXES. Except as provided below, the Purchaser will pay
any stock transfer taxes with respect to the transfer and sale of Shares to it
or its order pursuant to the Offer. If, however, payment of the purchase price
is to be made to, or if certificates for Shares not tendered or accepted for
payment are to be registered in the name of, any person(s) other than the
registered owner(s), or if tendered certificates are registered in the name(s)
of any person(s) other than the person(s) signing this Letter of Transmittal,
the amount of any stock transfer taxes (whether imposed on the registered
owner(s) or such person(s)) payable on account of the transfer to such
person(s) will be deducted from the purchase price unless satisfactory
evidence of the payment of such taxes or exemption therefrom is submitted.
 
  EXCEPT AS PROVIDED IN THIS INSTRUCTION 6, IT WILL NOT BE NECESSARY FOR
TRANSFER TAX STAMPS TO BE AFFIXED TO THE CERTIFICATES LISTED IN THIS LETTER OF
TRANSMITTAL.
 
  7. SPECIAL PAYMENT AND DELIVERY INSTRUCTIONS. If a check is to be issued in
the name of, and/or certificates for Shares not accepted for payment are to be
returned to, a person other than the signer of this Letter of Transmittal or
if a check is to be sent and/or such certificates are to be returned to a
person other than the signer of this Letter of Transmittal or to an address
other than that shown above, the appropriate boxes on this Letter of
Transmittal must be completed.

 
  8. WAIVER OF CONDITIONS. The Purchaser reserves the absolute right (subject
to the provisions of the Merger Agreement) in its sole discretion to waive any
of the specified conditions of the Offer, in whole or in part, in the case of
any Shares tendered.
 
  9. 31% BACKUP WITHHOLDING. In order to avoid backup withholding of Federal
income tax on payments of cash pursuant to the Offer, a stockholder tendering
Shares in the Offer must, unless an exemption applies, provide the Depositary
with such stockholder's correct taxpayer identification number (i.e., social
security number or employer identification number) ("TIN") on Substitute Form
W-9 below in this Letter of Transmittal and certify under penalties of perjury
that such TIN is correct and that such stockholder is not subject to backup
withholding. If a stockholder does not provide such stockholder's correct TIN
or fails to provide the certifications described above, the Internal Revenue
Service (the "IRS") may impose a $50 penalty on such stockholder and payment
of cash to such stockholder pursuant to the Offer may be subject to backup
withholding of 31%.
 
  Backup withholding is not an additional income tax. Rather, the amount of
the backup withholding may be credited against the Federal income tax
liability of the person subject to the backup withholding, provided that the
required information is given to the IRS. If backup withholding results in an
overpayment of tax, a refund may be obtained by the stockholder upon filing an
income tax return.
 
  The stockholder is required to give Depositary the TIN of the record holder
of the Shares. If the Shares are held in more than one name or are not in the
name of the actual owner, consult the enclosed "Guidelines for Certification
of Taxpayer Identification Number on Substitute Form W-9" for additional
guidance on which number to report.
 
  The box in Part 3 of Substitute Form W-9 may be checked if the tendering
stockholder has not been issued a TIN and has applied for a TIN or intends to
apply for a TIN in the near future. If the box in Part 3 is checked, the
stockholder or other payee must also complete the Certificate of Awaiting
Taxpayer Identification Number below in order to avoid backup withholding.
Notwithstanding that the box in Part 3 is checked and the Certificate of
Awaiting Taxpayer Identification Number is completed, the Depositary will
withhold 31% on all payments made prior to the time a properly certified TIN
is provided to the Depositary. However, such amounts will be refunded to such
stockholder if a TIN is provided to the Depositary within 60 days.
 
  Certain stockholders (including, among others, all corporations and certain
foreign individuals and entities) are not subject to backup withholding.
Noncorporate foreign stockholders must complete and sign a Form W-8,
Certificate of Foreign Status, a copy of which may be obtained from the
Depositary, in order to avoid backup withholding. See the enclosed "Guidelines
for Certification of Taxpayer Identification Number on Substitute Form W-9"
for more instructions.
 
  10. REQUESTS FOR ASSISTANCE OR ADDITIONAL COPIES. Questions and requests for
assistance or additional copies of the Offer to Purchase, this Letter of
Transmittal, the Notice of Guaranteed Delivery and the Guidelines for
Certification of Taxpayer Identification Number on Substitute Form W-9 may be
directed to the Information Agent or the Dealer Manager at their respective
addresses set forth below.
 
  11. LOST, DESTROYED OR STOLEN CERTIFICATES. If any certificate representing
Shares has been lost, destroyed or stolen, the stockholder should promptly
notify the Depositary by checking the box immediately preceding the special
payment/special delivery instructions and indicating the number of Shares so
lost, destroyed or stolen. The stockholder will then be instructed by the
Depository as to the steps that must be taken in order to replace the
certificate. This Letter of Transmittal and related documents cannot be
processed until the procedures for replacing lost, destroyed or stolen
certificates have been followed.

 
  IMPORTANT: THIS LETTER OF TRANSMITTAL (OR FAX HEREOF), TOGETHER WITH ANY
REQUIRED SIGNATURE GUARANTEES, OR, IN THE CASE OF A BOOK-ENTRY TRANSFER, AN
AGENT'S MESSAGE, AND ANY OTHER REQUIRED DOCUMENTS, MUST BE RECEIVED BY THE
DEPOSITARY PRIOR TO THE EXPIRATION DATE AND EITHER CERTIFICATES FOR TENDERED
SHARES MUST BE RECEIVED BY THE DEPOSITARY OR SHARES MUST BE DELIVERED PURSUANT
TO THE PROCEDURES FOR BOOK-ENTRY TRANSFER, IN EACH CASE PRIOR TO THE EXPIRATION
DATE, OR THE TENDERING STOCKHOLDER MUST COMPLY WITH THE PROCEDURES FOR
GUARANTEED DELIVERY.
 
             PAYER'S NAME: CHASEMELLON SHAREHOLDER SERVICES, L.L.C.
- --------------------------------------------------------------------------------
                        PART 1--PLEASE PROVIDE YOUR TIN
 SUBSTITUTE             IN THE BOX AT RIGHT AND CERTIFY     -------------------
 FORM W-9               BY SIGNING AND DATING BELOW           Social Security
                                                                 Number(s)
 
 
                                                            OR
- --------------------------------------------------------------------------------
                        PART 2--Certification--Under
                        penalty of perjury, I certify       -------------------
                        that:                                    Employer
                                                              Identification
 
 
                        (1) the number shown on this
                          form is my correct Taxpayer            Number(s)
                          Identification Number (or I am         Part 3--
                          waiting for a number to be           Awaiting TIN
                          issued to me) and                         [_]

                        (2) I am not subject to backup     --------------------
                          withholding because (a) I am           Part 4--
                          exempt from backup withholding        Exempt TIN
                          or (b) I have not been                    [_]
                          notified by the Internal
                          Revenue Service ("IRS") that I
                          am subject to backup
                          withholding as a result of a
                          failure to report all interest
                          or dividends or (c) the IRS
                          has notified me that I am no
                          longer subject to backup
                          withholding.
- --------------------------------------------------------------------------------
                        CERTIFICATION INSTRUCTIONS--You must cross out item
                        (2) in Part 2 above if you have been notified by the
DEPARTMENT OF THE       IRS that you are subject to backup withholding 
TREASURY                because of underreporting interest or dividends on 
INTERNAL REVENUE        your tax returns. However, if after being notified by 
SERVICE                 the IRS that you were subject to backup withholding 
                        you received another notification from the IRS 
PAYER'S REQUEST         stating that you are no longer subject to backup        
FOR TAXPAYER            withholding, do not cross out such item (2). If you 
IDENTIFICATION          are exempt from backup withholding, check the box in    
NUMBER (TIN)            Part 4 above.                                     
                      

SIGNATURE__________________________________________ DATE _____________, 1998
                        


 
 YOU MUST COMPLETE THE FOLLOWING CERTIFICATE IF YOU CHECKED THE BOX IN PART 3
                            OF SUBSTITUTE FORM W-9.
 
 
            CERTIFICATE OF AWAITING TAXPAYER IDENTIFICATION NUMBER
 
   I certify under penalty of perjury that a taxpayer identification number
 has not been issued to me, and either (a) I have mailed or delivered an
 application to receive a taxpayer identification number to the appropriate
 Internal Revenue Service Center or Social Security Administration Office or
 (b) I intend to mail or deliver an application in the near future. I
 understand that, if I do not provide a taxpayer identification number to the
 Depositary, 31% of all reportable payments made to me will be withheld, but
 will be refunded if I provide a certified taxpayer identification number
 within 60 days.
 
 -----------------------------------------     ________________________, 1998
                 Signature                                  Date
 
NOTE: FAILURE TO COMPLETE AND RETURN THIS SUBSTITUTE FORM W-9 WILL RESULT IN
     BACKUP WITHHOLDING OF 31% OF ANY PAYMENTS MADE TO YOU PURSUANT TO THE
     OFFER. PLEASE REVIEW THE ENCLOSED GUIDELINES FOR CERTIFICATION OF
     TAXPAYER IDENTIFICATION NUMBER ON SUBSTITUTE FORM W-9 FOR ADDITIONAL
     INFORMATION.
 
                    The Information Agent for the Offer is:
 
                                  GEORGESON 
                                & COMPANY INC.
                                --------------
                               Wall Street Plaza
                              New York, NY 10005
                Banks and Brokers Call Collect: (212) 440-9800
                   All Others Call Toll-Free: (800) 223-2064
 
 
                     The Dealer Manager for the Offer is:
 
                     MCFARLAND DEWEY SECURITIES CO., L.P.
 
                                230 Park Avenue
                            New York, NY 10169-1450
                                (212) 867-4949