Older structures may have 6mm thick Twinwall installed, if the original glazing system is being retained it will pay to check the fitment suitability of our 8mm thick sheet. 

Anti dust tape prevents dust and insects entering the open cells of the Twinwall. Being a twin pack the solid roll is intended to cover the top (high) end of the sheets. The cloth pocketed roll is intended to cover the bottom (low) end of the sheets allowing the cells to breath and any moisture to evacuate. Do not permanently seal both open ends of the Twinwall this will cause the trapped air to go stale and turn green. 

Silicone sealers and adhesives can be used if they are neutral cure, also check with the manufacturer if they are compatible with polycarbonate plastics.

SunTuf Twinwall has the inclusion of dual surface UV2 protection making Twinwall ideal for installations over pool and spa area – providing maximum protection for your family and friends while using your outdoor area.

We offer a 10-year limited warranty on our Twinwall products

Very important. Recommendations for the storage, installation and general treatment of Twinwall sheets are drafted to ensure that the product’s quality and serviceability is met to full extent, following these recommendations ensures that the product warranty is fully covered.

Twinwall sheets may be cut with either a circular saw (using a very fine blade, e.g. Bosch MULTIMATERIAL circular saw blade.) or a fine bladed jig saw. For best results it is often better to cut a few sheets at a time to reduce vibration. Sheets may also be cut by hand by carefully with a utility knife. For further information please refer to the Twinwall installation manual.

A mixture of warm water with a small amount of mild household detergent combined with a soft cloth should be sufficient to clean Twinwall sheets. Water blasting is also suitable only when the nozzle is kept at least 500mm from the sheet. NEVER use a solvent based cleaner (ammonia, etc.). NEVER clean wipe the sheets when dry. AVOID using sponges or brushes that can scratch the sheets surface. To remove and prevent Lichen, use 30 Seconds Roof and Awning cleaner as per the manufacturer’s instructions.  

Use Twinwall screws and ensure to pre-drill a 6mm hole and fix at every 300mm along the edge of purlins/rafters and every 500mm of internal purlins/rafters

No. For more safety information visit https://worksafe.govt.nz/

Twinwall Grey is the most effective out of the two colours, reducing some solar heat and glare, providing a comfortable outdoor area. Check with you local PSP branch for more information. 

Yes, use Twinwall Stainless Fixings with rubber washers. Do not over tighten, it is essential to maintain the original shape of the cells to avoid potential leaking & cracking of the Twinwall. Tighten all fasteners until they are “snug”. Note If the grey EPDM washer becomes deformed, the fastener is too tight!

Store sheets in a protected, shaded, ventilated site, with no direct exposure to sunlight and winds. For outdoor temporary storage, cover with an opaque protective tarp, avoiding heat-absorbing materials.

Twinwall has a Group 1s Fire Rating. Please contact PSP for further details.

Yes, polycarbonate sheets expand with heat, and contract with cold.

Yes. Twinwall Polycarbonate sheets filter out 99.9% of the sun’s harmful radiation. With the benefit of allowing non harmful radiation combined with excellent light transmission, makes for the perfect combination for healthy plant growth, therefore Twinwall is a perfect greenhouse product.

We do recommend that the topside of the rafters and purlins are painted a light colour to avoid excessive heat buildup potentially causing scorching of the underside of the sheets & causing excessive thermal movement. Painting and the application Suntuf noise reduction tape will also help reduce expansion noise. 

A 4mm thick panel has a weight of 0.8kg/m^2

Twinwall 8mm sheets can be curved lengthwise with a minimal cold bending radius of 1.4m.