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The spec to demand in writing
Three questions about your loads. Out comes the specification block that makes the 16 oz vs 18 oz trap impossible to spring on you: every line is a published, measurable value, and the block ends with the checks to run at reception. Paste it into any request for quote, ours or anyone else's.
Your loads
Decides the drop. Leave empty to keep the drop as an open line on the block.
Nothing here is estimated: every value in the block is published, with its source stated.
The block to paste into your RFQ
Copied.
First personal reply within 2 business days, with clarifying questions or next steps.
Why these exact values
The values in the block are the published reference values for standard 18 oz coated vinyl tarp fabric, as published by US fabric vendors (read 2026-08-16). They are the numbers a scale and a pull test can verify at reception, which is exactly why they belong in writing: Fabric under 16 oz lets water through; 18 oz takes the abrasion. The buyer finds out at the customer's dock, not at purchase.
The construction rule that separates serious from throwaway build: High-frequency welded seams for watertightness; hardware sewn on webbing, never on bare fabric.
Factories also declare lighter fabrics for lighter service. Those are factory claims we have not verified against a published spec sheet, so this tool does not write them into a spec: if your case genuinely calls for lighter fabric, the honest path is a sample verified on a scale before the order, and we say so on the quote.