Choose by condition, not a product label
Use this table to identify the decision that comes first. It is a selection framework, not a substitute for the product manual, supplier quotation, structural assessment or local requirements.
| Project condition | Starting point | Verify before ordering |
|---|---|---|
| Lightweight insulated glazing | Twinwall or multiwall panel system | Compare stated light and U-value data like for like. |
| Simple rigid roof or sidewall | Panel matched to the support system | Check loading, fixing and expansion guidance. |
| Repair or extension | Compatible panel and accessories | Match existing profile, thickness and drainage details. |
What to verify before purchase or installation
- Exact product data sheet, service conditions and warranty language.
- Compatibility between the cover, frame, fasteners, profiles, seals and any existing components.
- Measurements, access, safe handling and the weather window for installation.
- Wind, snow, heat, condensation and crop requirements that affect the complete greenhouse.
Material names and headline specifications do not establish a complete greenhouse outcome. Verify product-specific limits with the current manufacturer documentation and confirm structural or permitting requirements locally.
Common questions
Is polycarbonate good for a greenhouse?
Polycarbonate can suit compatible rigid structures, but the result depends on the complete glazing system, support geometry, installation details and maintenance plan.
Which side of polycarbonate faces out?
Follow the manufacturer's marked UV-protected face and installation instructions. Do not guess panel orientation.