Commercial production houses
Fixes: bay width, roof pitch, and whether the cover is film or a later rigid swap. Still open: thickness, UV stabilizer / HALS package, and the named ASTM method.
What the application fixes — and what it leaves open
An application names the house type and the exposure. It does not pick a density in g/cc or a grade designation. Those figures still come from the buyer’s drawing or from the factory’s written answer, not from a catalogue this site reprints.
Hoop and high-tunnel ranges
Fixes: hoop spacing and seasonal replacement cadence. Still open: roll width, fold, and whether a treated or printable option is wanted.
Nursery and propagation bays
Fixes: shorter spans and more frequent venting. Still open: condensation treatment and whether a sample must precede the lot.
OEM cover kits
Fixes: kit part list the receiving plant already uses. Still open: whether the factory will cross a competitor number in writing.
Research and trial houses
Fixes: small quantity and a tighter dimensional report. Still open: whether the trial grade can be reordered as the same lot recipe.
Seasonal replacement programs
Fixes: destination cluster and a repeating calendar. Still open: Incoterms, packing (rolls vs sheets) and origin of melt.
Commodity film versus a rigid engineering panel
Buyers often mix polyethylene film with a multiwall polycarbonate panel in one sentence. They are not the same request. This table is a decision aid, not a published rating set.
| Axis | Polyethylene film question | Rigid panel question | Who decides |
|---|---|---|---|
| Density | g/cc or grade designation if the factory uses it to split LDPE / LLDPE | Usually not the first axis; wall count and thickness come first | Buyer writes the figure; this site does not reprint one |
| Thermal | Service temperature in °F or °C next to the medium | Heat deflection temperature only if the drawing cites it | Buyer / receiving engineer |
| UV | UV stabilizer / HALS package on the extrusion or co-extrusion line | Which face carries the UV coating | Buyer names the ask; factory confirms |
| Compliance | REACH SVHC on the film grade | Named ASTM method plus any plant ISO 9001 file | Receiving plant’s file list |
Procurement situation, not a customer review: a materials manager replacing film on three commercial bays still has to write thickness, width and destination before any factory can answer. A neighbouring word order is not automatically the same configuration.
Send the application as purchase fields
House type and exposure help the factory read the brief. They do not replace thickness, quantity or destination.
Send Your Requirement Sheet