| Document and Entity Information | Jun. 30, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jun. 30, 2021 |
| Entity Registrant Name | SELECT INTERIOR CONCEPTS, INC. |
| Entity Central Index Key | 0001723866 |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Entity File Number | 001-38632 |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 47-4640296 |
| Entity Address, Address Line One | 400 Galleria Parkway |
| Entity Address, Address Line Two | Suite 1760 |
| Entity Address, City or Town | Atlanta |
| Entity Address, State or Province | GA |
| Entity Address, Postal Zip Code | 30339 |
| City Area Code | 888 |
| Local Phone Number | 701-4737 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Class A Common Stock, par value $0.01 per share |
| Trading Symbol | SIC |
| Security Exchange Name | NASDAQ |
