Select/spec vinyl siding by wind-load rating per code
domain: polymericexteriors.org · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Determine the site's design wind pressure from the locally adopted code (per ASCE 7/IBC wind provisions)
Confirm the vinyl siding product has a published design wind-load pressure rating from third-party testing under the applicable ASTM product standards
Select a product whose standard wind-load rating, tested under its manual's standard installation method, meets or exceeds the site's design wind pressure
For sites exceeding the code's standard allowance for vinyl siding without added testing, obtain test data or engineering calculations demonstrating compliance
Install exactly per the fastening pattern referenced in the tested wind-load rating, since deviating from it invalidates the rating
Known gotchas
A wind-load rating is only valid when installed per the specific fastening pattern it was tested under — changing fastener spacing or type without re-verification voids the rating's applicability
High-wind and coastal jurisdictions often require calculations beyond the code's standard allowance for vinyl siding — don't assume a standard-rated product is sufficient without checking local wind maps and exposure category
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