How should SUNTUF sheets be installed
to allow for thermal expansion?
Pre-drilling a 10mm diameter clearance hole at each screw fixing will give enough allowance for thermal movement in sheets up to our maximum stocked length of 7.2 metres. It is important that overlapped sheets are allowed to expand and contract independently without being fixed together in any way. For this reason, it is important to avoid using silicone between overlapped joints.
See Installation Guides for more information.

How far can SUNTUF sheets span?
SUNTUF polycarbonate sheets can span as far as their equivalent profiles in metal deck roofing. Industrial profiles are generally 1.0mm thick or 1.2mm thick, allowing them to span further than conventional 0.8mm thick sheets. Spans will vary according to location and wind speed; for further details please contact us by clicking on your state on the map.

What is the recommended
pitch for SUNTUF?
A 5 degrees roof pitch is recommended wherever possible to prevent the accumulation of water and dirt on SUNTUF sheets. Industrial profiles can be installed at lower pitches - in these cases the use of a sealing tape is recommended for side and end laps to ensure the watertightness of the installation.

Can SUNTUF be used in cyclonic regions?
Special fixings are available specifically for cyclonic regions. These fixings meet the requirements of AS1170-2. Deemed-to-Comply tables can be found on the Compliance Certificates page.

How is SUNTUF affected by UV radiation?
SUNTUF is manufactured with a premium quality UV protection layer co-extruded into the sheet. It protects the sheet from deterioration due to the sun's rays. 10-year-old SUNTUF sheets have been tested to the Sandbag Impact Test (AS1562-3) and passed, proving that SUNTUF's unique impact resistant properties are not compromised over prolonged exposure in the Australian sun. SUNTUF will not to lose more than 8% of light transmission over 10 years - its yellowing index is the lowest on the market.

How is SUNTUF affected by hailstones?
SUNTUF's resistance to hail is far superior to any other translucent roofing. Hail simulation tests have shown that high velocity impacts in excess of 100J (equating to a 40mm diameter hailstone) will not damage the sheets in any way. Test results are available upon request.

How is SUNTUF affected by fire?
SUNTUF has a low flammability rating and does not release strong toxic gases when burning. SUNTUF is compliant with testing performed in accordance with AS1530,3 - 1982.
Compliance Certificates are available here.

What silicone sealants should be used?
SUNTUF is unaffected by a wide range of chemical substances. Some silicones, however, may react agressively with the polycarbonate. It is important, therefore, that neutral cure non-acetic silicone is used whenever there is contact with the SUNTUF sheets.

For further questions…
If you have any other questions please contact us.