Guides
Vinyl siding specs explained: ASTM grades, wind ratings, install rules.
- Vinyl Siding Thickness and Grades: What ASTM D3679 Actually TestsThe ASTM specification behind every certified vinyl panel, what it tests, and how to tell a genuine grade claim from a marketing label.
- Insulated Vinyl Siding: What ASTM D7793 Adds to the Base StandardHow insulated vinyl siding is specified differently from standard vinyl, what R-value it has to hit, and what that R-value does and doesn't do for a wall.
- Heat Distortion: Why Reflected Sunlight Can Warp Vinyl SidingThe mechanism behind a well-documented vinyl siding failure: reflected, concentrated sunlight from nearby glass, and what manufacturers say about it.
- Wind-Load Ratings: How Vinyl Siding Is Rated for Your AreaThe ASTM test behind a vinyl siding wind rating, the baseline every certified product has to clear, and why some products are rated far higher.
- Color Retention and VSI Product Certification: What It Actually CoversWhat the Vinyl Siding Institute's product certification checks, how color retention gets tested separately, and how to verify a listing yourself.
- Installing Vinyl Siding Correctly: Nailing Hem and Expansion GapsThe exact nailing hem, fastener spacing, and expansion-gap numbers a correct vinyl siding installation follows, and why skipping them causes buckling.