01 / Material identity
Record fiber composition in % by fiber, fabric construction, yarn count where relevant, GSM in g/m², and usable width in cm or inches. Separate selvage from cutting width. A name such as outdoor polyester does not establish the coating, weave or finished weight.
02 / Exposure and finish
Distinguish intermittent rain, standing water, sunlight and repeated cleaning. Ask the proposed supplier to identify the water test basis, breathability basis, UV requirement and finish. Performance evidence must identify the exact article, method, edition, specimen condition and agreed threshold.
03 / Quantity and approval
State meters, yards or rolls per color and total. Request minimum order quantities, sampling costs, lab dip or strike-off stages and a bulk dye lot policy. A stock swatch helps shortlist materials; it does not approve the final production lot.
04 / Comparable delivered scope
Ask each quotation to separate material, sample, testing, packaging and transport charges. Include the US destination and delivery basis. A narrower low-price roll can yield fewer usable panels, so compare cutting yield alongside the headline unit price.