We don’t just sell these products, we use them ourselves! Here are a few insider tips we've picked up along the way.

Twinwall is a great product for reducing condensation. With any single skin polycarbonate product (e.g. Laserlite corrugated, Custom Glaze etc.) you can still get condensation under it when warm air gets trapped beneath a cold roof. This generally isn't an issue if it's an outdoor area, you get a small amount of condensation dripping down. However, if it's important that it stays mostly dry under the roof, Twinwall is the better choice. It acts like a double-glazed window so it's not as susceptible to condensation as other products.

Twinwall is designed to go on rafters. However, you can install the Twinwall on purlins (no more than 800mm apart or so) but there are a couple of considerations. The H snap joiners need to have pressure put on them to snap them together. This is more difficult with purlins as they will be flexible in-between the purlins. It can be done if someone is standing beneath the snap joiner supporting it while the person on the roof snaps them together with a rubber mallet or similar. If using a sheet wider than 610mm, it will need a screw in the middle of the sheet every time it meets a purlin.

Installing Twinwall isn't too difficult, but it is more complicated than corrugated or Custom Glaze. There are more accessories required, and it takes longer. It's important that it's done correctly, otherwise it can leak inside the flutes or get mould or sediment in there which is very difficult to clean out.

A frequent issue we see with imported kitset greenhouses and pergolas is the rapid breakdown of their original 4mm Twinwall roofing. Often, these kits are supplied with polycarbonate that lacks adequate UV protection for NZ conditions, causing it to become brittle and degrade after just 2 to 4 years. If you are looking to replace these panels, you have a couple of options. Unfortunately, high-quality, UV-protected 4mm Twinwall is not currently stocked by any suppliers in New Zealand. Many customers successfully upgrade to our high-quality 6mm Twinwall. Because the original kitset frame channels are designed for 4mm, you will generally need to adapt your setup by attaching the 6mm sheets directly to the outside of the frame. It requires a bit of DIY problem-solving, but it is achievable and provides a much longer-lasting solution. We highly recommend contacting the retailer you originally purchased the kitset from to see if you can claim replacement 4mm sheets under warranty. While these will likely be the same non-UV-protected material and will eventually break down again, it can give your structure another 2 to 4 years of life with an exact fit.

Different batches can have a slight variance in colour (mainly in the bronze and grey tints). We recommend you order your entire order in one go, not at different times.

Polycarbonate is affected by methylated spirits, benzene, petrol, ketones, acetone, phenols, chlorinated and aromatic hydrocarbons, petroleum-based paints, abrasive cleaners and solvents.