Exhibit 10.77.1

                                                               EXECUTION VERSION

                             PARTICIPATION AGREEMENT

         THIS PARTICIPATION  AGREEMENT (this "Agreement") is made as of the 19th
day of  September,  2002 (the  "Effective  Date") by and  among  ALLIED  CAPITAL
CORPORATION,  a Maryland corporation  (together with all successors and assigns,
the "Lead");  HEADWATERS INCORPORATED,  a Delaware corporation (the "Borrower");
and the persons set forth on Schedule 1 hereto (together with all successors and
assigns, individually a "Participant" and collectively the "Participants").

                                    RECITALS:

         A. The Borrower, Industrial Services Group, Inc. and other parties have
entered  into an  Agreement  and Plan of Merger dated July 15, 2002 (as amended,
the "Merger  Agreement")  pursuant to which  Participants are to receive certain
consideration.

         B. In  accordance  with the terms of a Loan  Agreement  dated as of the
date  hereof  (the  "Loan  Agreement"),  the Lead has  agreed to  advance to the
Borrower the aggregate principal amount of Twenty Million Dollars ($20,000,000),
which is evidenced  by, and is to be repaid  according to the terms of, a senior
subordinated note (the "Senior  Subordinated  Note") for the purpose of paying a
portion of the consideration pursuant to the Merger Agreement.

         C. The  Participants  desire to receive a portion of the  consideration
due under the Merger Agreement by participating in the Senior  Subordinated Note
to be held by the Lead, upon the terms and conditions set forth herein.

         D.  Participants and Lead agree that Borrower shall have the benefit of
certain  provisions of this  Agreement as set forth more fully herein,  and such
benefits  shall be part of and their  continuation a condition to any assignment
of the Participants'  interests under the Loan Agreement and this  Participation
Agreement.

         NOW, THEREFORE,  in consideration of the foregoing Recitals, the mutual
covenants  herein  contained,  and other good and  valuable  consideration,  the
receipt and  sufficiency  of which is hereby  acknowledged,  the parties  hereto
hereby agree as follows:

                             ARTICLE I: DEFINITIONS

         1.01 Defined Terms Generally.  Any capitalized term used herein and not
defined herein shall have the meaning given to it in the Loan Agreement.

                   ARTICLE II: TERMS OF PARTICIPATION INTEREST

         2.01  Participation.  At the  Effective  Time (as defined in the Merger
Agreement) the  Participants  hereby agree to  participate  with the Lead in the
Senior  Subordinated Note to the extent of Ten Million Dollars  ($10,000,000) of
the original principal amount of the Senior  Subordinated Note and shall receive



and have legal and  equitable  ownership  of all  collections  relating  thereto
(collectively,   the  "Participation   Interest")   (constituting  an  undivided
aggregate percentage interest equal to 50% of the Senior Subordinated Note). The
remaining Ten Million Dollars  ($10,000,000) of the original principal amount of
the Senior Subordinated Note and all collections relating thereto (collectively,
the "Retained Interest") (constituting an undivided percentage interest equal to
50% of the Senior  Subordinated  Note) shall be retained by the Lead for its own
account.  The  parties  agree that the Lead at  Closing  shall be  obligated  to
advance  only the  Retained  Interest to Borrower,  and that the  remaining  $10
million principal amount shall have been deemed to have been advanced by Lead as
a result of Participants  entering into the Merger  Agreement.  The Participants
will  also  share,  on a pro  rata  basis,  in  any  points,  structuring,  loan
originating  or other  up-front  fees of any nature,  paid by the Borrower  with
respect to the Senior  Subordinated  Note.  Participants and Lead agree that the
Participants  shall not receive,  and Borrower has no  obligation  to pay to the
Participants  or to any other party,  any Repayment  Charges due pursuant to the
terms of the Loan Agreement with respect to the Participation Interest.

         2.02  Terms  of  Participation  Interest  and  Retained  Interest.  The
Participation  Interest and the  Retained  Interest  each shall accrue  interest
(before  and  after  default),  mature,  and be  repayable  upon the  terms  and
conditions  stated in the Senior  Subordinated  Note.  No preference or priority
shall  be made  between  the  Participants  and the Lead  for  purposes  of this
Agreement and the Senior  Subordinated  Note and the performance and enforcement
thereof,  including without  limitation as to collections and distributions with
respect to the Senior Subordinated Note and in connection with any bankruptcy or
similar proceedings involving the Borrower.

         2.03  Participation  Certificate.  Immediately  following the Effective
Time,  the Lead will  promptly  deliver to each  Participant  a  certificate  of
ownership  substantially  in the form of Exhibit "A" attached hereto showing the
aggregate   principal   balance  of  the  Senior   Subordinated   Note  and  the
Participation  Interest of such  Participant.  Any subsequent  adjustment to the
Participation  Interest (other than as a result of payments  received on account
of the Participation Interest) shall result in the delivery of a new certificate
of  ownership.  Each such  certificate  shall be  cumulative,  and upon  receipt
thereof by the Participant,  any prior outstanding certificate shall become void
and shall be promptly returned to the Lead by the Participant.

         2.04 Non Recourse.  The participation of the Participants in the Senior
Subordinated  Note is made WITHOUT  RECOURSE to the Lead, and the Lead shall not
be liable to the Participants for any losses, damages or expenses (collectively,
"Losses")  suffered or incurred by the Participants or any subsequent  holder of
the  Participation  Interest,  except for any Losses  resulting  from the Lead's
breach of any express obligations under this Agreement.

         2.05 No Loan or Joint  Venture;  No Holder  Status.  The  Participation
Interest  shall not constitute a loan from the  Participants  to the Lead, nor a
purchase of a portion of the Senior Subordinated Note from the Lead, nor a joint
venture  by  and  between  the  Lead  and  the  Participants.  Each  Participant
acknowledges and agrees that it shall not constitute a Holder under the terms of
the Loan Documents.

                                      -2-


         2.06 Term of Agreement.  This Agreement  shall continue until such time
as the Senior  Subordinated Note (a) has been indefeasibly paid in full, (b) all
Obligations   under  the  Loan  Documents  have  been  discharged  and  (c)  all
obligations of the parties  hereunder have been  satisfied.  At such time,  this
Agreement shall expire without further action by the parties.

         2.07   Acknowledgment   of  Subordinated   Status.   The   Participants
acknowledge that the Senior  Subordinated Note is subject and subordinate to the
rights of General Electric Capital Corporation  ("Senior Bank") pursuant to that
certain  Credit  Agreement  of even date,  to the full  extent  provided in that
certain Subordination  Agreement between the Lead, the Borrower and Senior Bank,
of even date (as from time to time amended, the "Subordination Agreement").


                     ARTICLE III: DEALINGS WITH THE BORROWER

         3.01 Payments.

         (a) By its joinder in this Agreement, the Borrower hereby covenants and
agrees to make  payments on account of the  Participation  Interest  directly to
each Participant at its address set forth in Section 6.03 (Notices) below (or to
such other address as such Participant may subsequently  direct in a notice sent
to the  Borrower  and the Lead) and to make  payments on account of the Retained
Interest directly to the Lead at its address set forth in the Loan Agreement (or
to such other  address as the Lead may  subsequently  direct in a notice sent to
the Borrower and the Participants).

         (b) If the  Participants  have not received  from the Borrower the full
amount of any installment  payment (including any principal and interest payable
pursuant to the Senior  Subordinated  Note) due on account of the  Participation
Interest within five days of the due date thereof,  then the Participants  shall
send written  notice to the Lead  referencing  the amount of the payment due and
the  original  due date  thereof  and the  amount (if any)  received  on account
thereof (any such, a  "Participant  Payment  Notice").  If the Lead has actually
received or thereafter receives from the Borrower any sum of money on account of
the same installment  payment due under the Senior Subordinated Note that is the
subject of a Participant Payment Notice received from the Participants, then the
Lead shall remit to the  Participants,  within five  Business Days of the Lead's
receipt of the  Participation  Payment  Notice (or if the Lead receives any such
amount after the date of the Lead's receipt of the Participation Payment Notice,
then within  five  Business  Days of the Lead's  receipt of such  amount),  each
Participant's  Pro Rata Share (as defined herein) of the payment received by the
Lead (up to the amount due, but unpaid, by the Borrower to the Participants) and
the Lead  shall  retain  the Pro  Rata  Share of the  payment  received  that is
attributable  to the  Retained  Interest.  "Pro Rata" and "Pro Rata Share" shall
mean the pro rata share of the Lead or the  Participants (as the case may be) of
the Senior Subordinated Note.

                                      -3-


         3.02 Collections.

         (a)  Except  as  provided  in  Section  3.03  below,  the  Lead and the
Participants  shall each be  entitled to receive a Pro Rata Share of all amounts
collected on account of the Senior  Subordinated  Note in accordance  with their
respective   percentage   interests   (provided  that  in  no  event  shall  the
Participants  be  entitled to any  portion of any  Repayment  Charges due to the
Lead), and the Lead and each Participant  shall each bear any losses Pro Rata in
accordance with their respective percentage interests.

         (b) If the Lead  shall  collect or obtain  any  amounts  owed under the
Senior Subordinated Note that applies to both the Participation Interest and the
Retained  Interest,  regardless of the source  thereof  (other than receipt of a
payment by the Borrower  governed by Section  3.01  above),  then the Lead shall
remit to the  Participants,  within five Business Days, each  Participant's  Pro
Rata Share of the net proceeds received,  after deducting all costs and expenses
(including,  but not limited to, reasonable  attorneys' fees and  disbursements)
incurred in connection  with obtaining or collecting  such amount that were not:
(i) proportionately borne by the Participants;  (ii) proportionately  reimbursed
by the  Participants  pursuant to the terms of Section  4.04(e) below;  or (iii)
reimbursed by the Borrower. If either the Lead or the Participants shall receive
any amounts in excess of what the  recipient  would be entitled to receive under
the terms of this  Agreement  (including  payments,  additional  fees,  costs or
expenses  other than any Repayment  Charges in favor of the Lead under the terms
of the Loan  Agreement),  the  recipient  shall cause such excess  payment to be
shared Pro Rata in accordance with the terms of this Agreement.

         (c) Any  payments or other  amounts  received  that are  required to be
returned to the Borrower, or any bankruptcy estate involving the Borrower, shall
be borne  equally  by the Lead and the  Participants  in  accordance  with their
respective Pro Rata Shares.

         3.03 Cost  Reimbursement.  Notwithstanding  the terms of  Section  3.02
above,  no  Participant  shall be  entitled  to  receive a Pro Rata Share of any
amounts obtained from the Borrower as reimbursement of any costs or expenditures
made  solely by the Lead and not  shared Pro Rata by such  Participant,  and the
Lead shall not be entitled  to receive a Pro Rata Share of any amounts  obtained
from the Borrower as reimbursement  of any costs or expenditures  made solely by
the Participants and not shared Pro Rata by the Participants and the Lead.

         3.04 Observation Rights Information. Participants, the Borrower and the
Lead agree that  Participants  shall not be entitled to receive any  information
pursuant  to  Section  6.13  of the  Loan  Agreement  to the  extent  that  such
information  is  identified by Borrower to be related to  performance  under the
Merger   Agreement  or  the  employment   performance  or  compensation  of  the
Participants.

         3.05  Notices &  Deliveries.  By its  joinder  in this  Agreement,  the
Borrower hereby  covenants and agrees to provide directly to the Participants at
the address set forth in Section 6.03 (Notices)  below (or to such other address
as the Participants may subsequently direct in a notice sent to the Borrower and
the Lead):  (a) a copy of each Notice  given to the Lead;  and (b) a copy of all

                                      -4-


documents  or  materials  required  to be given the Lead.  The  delivery of such
Notices,  documents  or  other  materials  to the  Participants  shall  be  made
concurrently with their delivery to the Lead.

                     ARTICLE IV: LOAN DOCUMENTS; ENFORCEMENT

         4.01 Title to Loan Documents.  Legal title to, and physical  possession
of, the Loan Documents shall be held by the Lead. Subject to the confidentiality
provisions of the Loan  Agreement  which the parties agree are applicable to the
Participants  as if the  Participants  were  Holders  (as  defined  in the  Loan
Agreement)  of  the  Senior   Subordinated  Note,  the  Participants  and  their
authorized representatives shall be entitled to examine, audit and copy the Loan
Documents at the offices of the Lead during normal  business hours upon not less
than 72 hours notice to the Lead and at the sole expense of the Participants.

         4.02 Copies of Loan Documents.  The Participants acknowledge receipt of
copies of each of the Loan Documents.

         4.03  Agency.   Subject  to  the  terms  of  Section  5.02  below,  the
Participants  hereby appoint the Lead as the Participants  duly authorized agent
to represent the Participants in all matters related to the  administration  and
enforcement  of the Senior  Subordinated  Note and the Loan  Documents with full
power and authority to: (a) sue in the name of the Lead or the Participants; (b)
collect and receive any funds owed by the  Borrower  under the terms of the Loan
Documents;  (c) enforce the terms and conditions of the Loan  Documents  against
the Borrower;  and (d) exercise any and all rights,  powers and privileges under
any of the Loan Documents related to the Senior Subordinated Note.

         4.04 Administration and Enforcement. The Senior Subordinated Note shall
be administered as follows:

         (a) The Lead will  manage the Senior  Subordinated  Note,  and elect to
exercise any rights,  powers and  privileges  related  thereto,  in the ordinary
course of business, in accordance with its usual practice and in conformity with
the terms of the Loan Agreement and the other Loan Documents.

         (b) All decisions  concerning  the  enforcement of the rights under the
Loan Documents  shall be made solely by the Lead and the Lead shall have no duty
to obtain  the  consent  of the  Participants  in taking  or  pursuing  any such
actions.

         (c) The  Participants  shall  not be  entitled  to send any  notice  of
default or other notice  relating to the  collection of the Senior  Subordinated
Note or enforcement of any rights under the Loan Documents to the Borrower.

         (d) The  Lead  shall  bear  its own  internal  and  usual  expenses  of
servicing the Senior Subordinated Note.

                                      -5-


         (e)  All  out-of-pocket  costs  and  expenses  paid  to  third  parties
(including,  but not limited to, reasonable  attorneys' fees and  disbursements)
reasonably  incurred by the Lead in  connection  with  administering  the Senior
Subordinated Note, or enforcing the Lead's or the Participants' rights under the
Loan  Documents  shall be shared  pro rata by the Lead and the  Participants  in
accordance with their respective  undivided  percentage  interests of the Senior
Subordinated Note and the Lead shall be promptly  reimbursed by the Participants
for any such payments made by the Lead on behalf of the Participants.

         (f) Simultaneously  with the delivery of any notice of default or other
notice to the  Borrower,  or execution  of any  amendment of or waiver under the
Loan Documents,  the Lead shall furnish a copy to the Participants in accordance
with Section 6.03 below.

              ARTICLE V: RELATIONSHIP BETWEEN LEAD AND PARTICIPANT

         5.01 Required Consents.

         (a) The Lead  will not take or cause to be taken  any of the  following
actions without the prior written consent of Participants  holding a majority of
the outstanding principal balance of the Participation  Interest,  which consent
shall not be  unreasonably  withheld,  conditioned  or  delayed:  (i) reduce the
principal of, or the stated interest rate on, the Senior  Subordinated  Note, or
(ii)  discharge  the  Borrower or any other  obligor,  except as required by the
terms of the Loan Documents,  or (iii) agree to or make any  modifications to or
amendments, supplements or waivers of any provision of any of the Loan Documents
(other than actions  taken in accordance  with the terms of the Loan  Agreement)
which materially adversely affect the rights and/or benefits of the Participants
under this Agreement or the Senior Subordinated Note.

         (b) Except  where the  consent of the  Participants  is required by the
terms of  subsection  (a) of this  Section  5.01,  the Lead may agree to modify,
amend,  supplement or waive any of the provisions of any of the Loan  Documents,
and may exercise any rights, powers and privileges thereunder,  without the need
to obtain the Participants' prior consent. The Lead shall furnish written notice
to the Participants of any such modification,  amendment,  supplement, waiver or
exercise involving any of the Loan Documents.

         5.02 Liability to Participants.

         (a) The Lead shall not be deemed to  constitute  or act as a trustee or
fiduciary  for the  Participants  in  connection  with  this  Agreement  and the
Participation Interest. The Lead shall not be liable to the Participants for any
action  taken or  omitted  or for  errors in  judgment,  except  for  actions or
omissions  or  errors  taken  or  made in bad  faith  or for  the  Lead's  gross
negligence or willful  misconduct.  The Lead will have the right to consult with
legal counsel of the Lead's choice and to be fully exonerated from liability for
any action taken in good faith in accordance with the advice of such counsel.

         (b)  The  Lead  does  not   assume  or   warrant   and  shall  have  no
responsibility or liability (express or implied) for:

                                      -6-


                  (i) any  acts or  omissions  of the  Lead  in  conducting  due
         diligence and other investigations into the Borrower;

                  (ii) the  financial  condition or legal status of the Borrower
         or any other obligor or any credit or other information furnished by it
         to the Participants;

                  (iii)   the   collectibility,   enforceability,   genuineness,
         sufficiency,  or validity of the Senior  Subordinated  Note or the Loan
         Documents; or

                  (iv) any  obligation to inquire into or ensure  performance by
         the Borrower of any of the terms, covenants, conditions, or obligations
         of the Borrower under the Loan Documents.

                            ARTICLE VI: MISCELLANEOUS

         6.01 Independent Decision; Representation by Counsel. Each Participant,
only as to himself or itself,  hereby represents,  warrants and confirms for the
Lead that:

         (a) The Participant is an experienced,  sophisticated  investor capable
of  evaluating  the merits of an investment  similar to the Senior  Subordinated
Note;

         (b) The  Participant  has had the  benefit of  consultation  with legal
counsel of its own choosing and the ability to consult with additional  advisors
as it deemed appropriate;

         (c) The  Participant  has  received,  prior  to the  execution  of this
Agreement,  copies of the Loan Documents and all financial and other information
concerning  the  Borrower,  as the  Participant,  in  the  exercise  of its  own
independent judgment, determined to be necessary or advisable in connection with
its decision to enter into this Agreement;

         (d) The  Participant  has  had  sufficient  opportunity  to  conduct  a
complete  investigation and examination of the Senior  Subordinated Note and the
Borrower,  and is  entering  into  this  Agreement  based  upon its  independent
analysis and evaluation of the merits of the Senior Subordinated Note; and

         (e) The  Participant  has  reached  its  own  independent  decision  to
purchase the Participation Interest based upon its expertise,  investigation and
analysis, and the Participants did not rely upon any representations, warranties
or undertakings of the Lead not expressly set forth herein.

         6.02 Additional  Participation Interests. The Lead shall have the right
to sell additional participation interests.

         6.03 Notices. All notices or communications under this Agreement or the
Senior  Subordinated Note shall be sent by facsimile,  mail, postage prepaid, or
delivered to the  following  addresses (or to such other address as shall at any
time be designated by any party in writing to the other parties):

                                      -7-



         To the Lead:          Allied Capital Corporation
                               1919 Pennsylvania Avenue, N.W.
                               Washington, D.C. 20006-3434
                               Attention: Thomas Westbrook
                               Facsimile: (202) 659-2053

         With a copy to:       Piper Rudnick LLP
                               1200 Nineteenth Street, N.W.
                               Washington, D.C. 20036
                               Attention:  Anthony H. Rickert, Esq.
                               Facsimile: (202) 223-2085

         To the Participants:  R Steve Creamer
                               136 East South Temple, Suite 1300
                               Salt Lake City, UT 84111
                               Facsimile: (801) 236-9730

         With a copy to:       Parsons Behle & Latimer
                               201 South Main Street, Suite 1800
                               Salt Lake City, UT 84111
                               Attention: J. Gordon Hansen
                               Facsimile: (801) 536-6111

         To Borrower:          Headwaters Incorporated
                               11778 South Election Road, Suite 210
                               Draper, UT  84020
                               Attention:  Chief Financial Officer
                               Facsimile: (801) 984-9410

         Rejection  or other  refusal to  accept,  or the  inability  to deliver
because of a changed address of which no notice was given,  shall not affect the
effectiveness or the date of delivery for any notice sent in accordance with the
foregoing provisions.  Each such notice, request or other communication shall be
deemed  sufficiently  given,  served, sent and received for all purposes at such
time as it is delivered to the addressee (with the return receipt,  the delivery
receipt,  the  affidavit  of the  messenger  or the  answer  back  being  deemed
conclusive  (but not  exclusive)  evidence of such  delivery) or at such time as
delivery is refused by addressee upon presentation.

         6.04  Binding  Agreement.  This  Agreement  shall bind and inure to the
benefit  of each of the  parties  hereto,  and  except  as  otherwise  expressly
provided to the contrary herein, each of their respective heirs,  successors and
assigns.

                                      -8-


         6.05 Entire Agreement;  Integration  Clause.  This Agreement,  together
with the exhibits,  constitutes  the entire  agreement  between the parties with
respect  to the  subject  matter  hereof  and  supersedes  all prior  agreements
relating to the matters set forth herein.

         6.06 No Oral  Modifications  or  Waivers.  The terms  herein may not be
modified or waived  orally,  but only by an instrument in writing  signed by the
party against which  enforcement of the  modification or waiver (as the case may
be) is sought.

         6.07 Governing  Law. This Agreement  shall be governed by and construed
in  accordance  with the laws of the State of  Maryland,  without  regard to its
conflict of laws principles.

         6.08 No Reconveyance by Participants.  The Participants shall not sell,
pledge,  assign,  subparticipate,  or otherwise transfer their rights under this
Agreement  (each, a "Transfer"),  or the  certificate of ownership,  without the
prior  written  consent  of the Lead  and,  Borrower,  which  consent  shall not
unreasonably withheld, delayed or conditioned, except for Permitted Assignments.
"Permitted  Assigment"  means any  assignment or  delegation of a  Participant's
rights or duties  with  respect  to its pro rata  portion  of the  Participation
Interest  to (i)  an  Affiliate  of  the  Participant  or as a  result  of or in
connection  with the liquidation or dissolution of the  Participant,  or (ii) in
the case of a Participant  other than an entity, a spouse or relative within the
first degree of consanguinity, or trusts or similar estate planning vehicles for
the benefit of a spouse or a relative within the first degree of  consanguinity.
The term "Affiliate" shall have the meaning set forth in the Loan Agreement.  As
a condition to any Transfer,  such transferee  shall agree to be bound to all of
the provisions of this Agreement,  including without  limitation  Sections 2.01,
3.04 and 6.08.

         6.09 Counterparts; Facsimile Signatures. This Agreement may be executed
in counterparts and all such counterparts shall together  constitute one and the
same agreement. This Agreement may be executed by facsimile signatures.

                           {Signatures on next page.}


                                      -9-


         IN WITNESS WHEREOF, the undersigned have executed and delivered this
Agreement as of the date first above written.

                                               "PARTICIPANTS":


                                               CREAMER INVESTMENTS, INC.



                                               By:  /s/ R. Steve Creamer
                                                   -----------------------------
                                               Name:  R. Steve Creamer
                                               Title: President and C.E.O.


                                                       /s/ Raul A. Deju
                                                   -----------------------------
                                                    Raul A. Deju


                                                       /s/ J. I. Everest, II
                                                   -----------------------------
                                                    J. I. Everest, II



                                                       /s/ Brett A Hickman
                                                   -----------------------------
                                                     Brett A. Hickman



                                               "LEAD":

                                               ALLIED CAPITAL CORPORATION
                                               a Maryland corporation

                                               By:   /s/ Thomas H. Westbrook
                                                   -----------------------------
                                                   Thomas H. Westbrook
                                                   Managing Director



                    SIGNATURE PAGE TO PARTICIPATION AGREEMENT




                                              "BORROWER":


                                               HEADWATERS INCORPORATED


                                               By:   /s/ Steven G. Stewart
                                                   -----------------------------
                                                   Steven G. Stewart
                                                   Chief Financial Officer





                    SIGNATURE PAGE TO PARTICIPATION AGREEMENT


                                   EXHIBIT "A"

                            CERTIFICATE OF OWNERSHIP

         This Certificate evidences that BRETT A. HICKMAN (the "Participant") is
a participant to the extent of Two Hundred Twenty Three Thousand,  Seven Hundred
Forty  Dollars  ($223,740)  (the  "Participation  Amount")  from ALLIED  CAPITAL
CORPORATION  (the "Lead") out of an  aggregate  principal  investment  of Twenty
Million Dollars ($20,000,000) made by Allied Capital Corporation (the "Lead") to
Headwaters  Incorporated,  a Delaware corporation (the "Borrower") pursuant to a
certain  Loan  Agreement  dated  September  19,  2002  between  the Lead and the
Borrower.

         This Certificate is issued pursuant to a Participation  Agreement dated
as  of  September  19,  2002,   between  the   Participant  and  the  Lead  (the
"Participation  Agreement"),  evidences the legal and equitable ownership of the
Participation Interest (as defined in the Participation Agreement) to the extent
of the  Participation  Amount,  and is subject  to all the terms and  conditions
thereof.

         This  Certificate is cumulative  and supersedes all prior  certificates
previously issued and delivered to the Participant pursuant to the Participation
Agreement. Any outstanding prior certificate is automatically null and void upon
Participants'  receipt of this Certificate and shall be promptly  surrendered to
the Lead for cancellation.

         This Certificate is transferable  only with the written approval of the
Lead and upon due endorsement and surrender to the Lead.

                                                  ALLIED CAPITAL CORPORATION
                                                  a Maryland corporation



Dated:   September 19, 2002                       By: /s/ Thomas H. Westbrook
                                                     ---------------------------
                                                  Name: Thomas H. Westbrook
                                                  Title: Managing Director




                                   EXHIBIT "A"

                            CERTIFICATE OF OWNERSHIP

         This Certificate  evidences that J. I. EVEREST,  II (the "Participant")
is a  participant  to the extent of Five Hundred  Thirty Seven  Thousand,  Eight
Hundred  Eighty  Dollars  ($537,880)  (the  "Participation  Amount") from ALLIED
CAPITAL  CORPORATION  (the "Lead") out of an aggregate  principal  investment of
Twenty Million Dollars  ($20,000,000)  made by Allied Capital  Corporation  (the
"Lead") to Headwaters  Incorporated,  a Delaware  corporation  (the  "Borrower")
pursuant to a certain Loan Agreement  dated  September 19, 2002 between the Lead
and the Borrower.

         This Certificate is issued pursuant to a Participation  Agreement dated
as  of  September  19,  2002,   between  the   Participant  and  the  Lead  (the
"Participation  Agreement"),  evidences the legal and equitable ownership of the
Participation Interest (as defined in the Participation Agreement) to the extent
of the  Participation  Amount,  and is subject  to all the terms and  conditions
thereof.

         This  Certificate is cumulative  and supersedes all prior  certificates
previously issued and delivered to the Participant pursuant to the Participation
Agreement. Any outstanding prior certificate is automatically null and void upon
Participants'  receipt of this Certificate and shall be promptly  surrendered to
the Lead for cancellation.

         This Certificate is transferable  only with the written approval of the
Lead and upon due endorsement and surrender to the Lead.

                                                 ALLIED CAPITAL CORPORATION
                                                 a Maryland corporation



Dated:   September 19, 2002                      By: /s/ Thomas H. Westbrook
                                                    ----------------------------
                                                 Name: Thomas H. Westbrook
                                                 Title: Managing Director


                    SIGNATURE PAGE TO PARTICIPATION AGREEMENT


                                   EXHIBIT "A"

                            CERTIFICATE OF OWNERSHIP

         This Certificate  evidences that RAUL A. DEJU (the  "Participant") is a
participant to the extent of Seven Hundred Forty Eight  Thousand,  Three Hundred
Twenty Eight Dollars and 40/100 ($748,328.40) (the "Participation  Amount") from
ALLIED CAPITAL CORPORATION (the "Lead") out of an aggregate principal investment
of Twenty Million Dollars  ($20,000,000) made by Allied Capital Corporation (the
"Lead") to Headwaters  Incorporated,  a Delaware  corporation  (the  "Borrower")
pursuant to a certain Loan Agreement  dated  September 19, 2002 between the Lead
and the Borrower.

         This Certificate is issued pursuant to a Participation  Agreement dated
as  of  September  19,  2002,   between  the   Participant  and  the  Lead  (the
"Participation  Agreement"),  evidences the legal and equitable ownership of the
Participation Interest (as defined in the Participation Agreement) to the extent
of the  Participation  Amount,  and is subject  to all the terms and  conditions
thereof.

         This  Certificate is cumulative  and supersedes all prior  certificates
previously issued and delivered to the Participant pursuant to the Participation
Agreement. Any outstanding prior certificate is automatically null and void upon
Participants'  receipt of this Certificate and shall be promptly  surrendered to
the Lead for cancellation.

         This Certificate is transferable  only with the written approval of the
Lead and upon due endorsement and surrender to the Lead.

                                                ALLIED CAPITAL CORPORATION
                                                a Maryland corporation



Dated:   September 19, 2002                     By: /s/ Thomas H. Westbrook
                                                   -----------------------------
                                                Name: Thomas H. Westbrook
                                                Title: Managing Director


                    SIGNATURE PAGE TO PARTICIPATION AGREEMENT



                                   EXHIBIT "A"

                            CERTIFICATE OF OWNERSHIP

         This  Certificate   evidences  that  CREAMER  INVESTMENTS,   INC.  (the
"Participant")  is a participant  to the extent of Eight  Million,  Four Hundred
Ninety   Thousand,   Fifty  One   Dollars   and  60/100   ($8,490,051.60)   (the
"Participation  Amount") from ALLIED CAPITAL  CORPORATION (the "Lead") out of an
aggregate principal  investment of Twenty Million Dollars  ($20,000,000) made by
Allied Capital Corporation (the "Lead") to Headwaters  Incorporated,  a Delaware
corporation  (the  "Borrower")  pursuant  to  a  certain  Loan  Agreement  dated
September 19, 2002 between the Lead and the Borrower.

         This Certificate is issued pursuant to a Participation  Agreement dated
as  of  September  19,  2002,   between  the   Participant  and  the  Lead  (the
"Participation  Agreement"),  evidences the legal and equitable ownership of the
Participation Interest (as defined in the Participation Agreement) to the extent
of the  Participation  Amount,  and is subject  to all the terms and  conditions
thereof.

         This  Certificate is cumulative  and supersedes all prior  certificates
previously issued and delivered to the Participant pursuant to the Participation
Agreement. Any outstanding prior certificate is automatically null and void upon
Participants'  receipt of this Certificate and shall be promptly  surrendered to
the Lead for cancellation.

         This Certificate is transferable  only with the written approval of the
Lead and upon due endorsement and surrender to the Lead.

                                                ALLIED CAPITAL CORPORATION
                                                a Maryland corporation



Dated:   September 19, 2002                     By: /s/ Thomas H. Westbrook
                                                   -----------------------------
                                                Name: Thomas H. Westbrook
                                                Title: Managing Director

                    SIGNATURE PAGE TO PARTICIPATION AGREEMENT