Cuts 99% of harmful UV Rays

You can enjoy the outdoors feeling yet be protected from the sun, because Zammit Roofing glass reinforced polyester sheeting has inbuilt protection against the transmission of harmful ultra violet rays. Sun without sunburn.

Australian Made

Zammit Roofing sheeting is made to stand up to tough Australian conditions from Cairns to Cradle Mountain. When you choose Zammit Roofing glass reinforced sheeting you can be sure that it has been made from the highest quality materials available using the world’s latest resin technology. Zammit Roofing’s manufacturing process ensures that each phase of production is absolutely consistent from batch to batch.

Polyester film surface protection

This tough film forms an integral part of the sheet and increases its life as it prevents reinforcing fibres becoming exposed on the surface of the sheet.

For even better weather ability, please consider Wonderglas GCP.

Available Profiles





There are so many ways to use Zammit Roofing”Corri-glas” and “Trim-glas”. And, the cost is moderate, so it’s good value too. If you want plenty of light, lasting protection from the sun, and a great home feature, start by drawing up a simple plan.

Zammit Roofing sheeting is lightweight and easy to handle and install. Even projects such as an outdoor living area or carport can be a satisfying Do-It-Yourself job.

Before you order materials or commence to build you should check that your proposed work complies with local council by-laws. Minimum recommended roof pitch is 5º.

The tables below give you the maximum span between battens or purlins for the 1200 and 1800 series sheeting. Sheet lengths available are also shown, and the “Sheet coverage table” helps you calculate how many sheets to buy.

Spanning Capacity

Domestic and Heavy Duty Grades
Profile Series Max. Span
“Corri-glas” (Corrugated) 1200 750mm
1800 1000mm
“Trim-glas” (5 Rib) 1200 900mm
1800 120mm

The span between battens or supports should not exceed the above measurements

Sheet Coverage Table

Profile 1 Sheet 2 Sheets 3 Sheets 4 Sheets 5 Sheets
“Corri-glas” 760mm 1620mm 2380mm 3140mm 3900mm
“Trim-glas” 760mm 1580mm 2340mm 3100mm 3860mm

Corrugated sheets should have 1.5 overlaps, 1 rib only on 5 Rib sheets. Overlaps should face away from prevailing wind.

Sheet Lengths

Profiles: Corrugated and 5 Rib
1.800m 2.100m 2.400m 2.700m 3.000m 3.300m 3.600m 3.900m 4.200m 4.500m 4.800m 5.100m 5.700m 6.000m

In addition to these stock lengths a cut to size service is available through most outlets.

Light and Heat Transmission

Grade 1200g 1800g
Light % Heat % Light % Heat %
Ice Clear 84 82 76 74
Opal (white) 69 62 69 62
Emerald Green 48 62 N/A N/A
Brown 45 62 N/A N/A
Slate Grey 48 60 42 52
Haze Green (in 1800g only) N/A N/A 60 72

The above tests were conducted by a NATA approved research laboratory and are available on request.

Zammit Roofing Product Grades

Type Grade Weight
Domestic Series 1200 1.2kg per m2 (4oz)
Heavy Duty Series 1800 1.8kg per m2 (6oz)

Translucent Ridge Capping can be supplied in both grades.


Always pre-drill the sheets with a drill 2mm larger than the fixing screw to allow for sheet movement due to expansion and contraction of the material.

“Corri-glas” sheets should be crest fixed at every second or third corrugation at the ends, and every third or fourth corrugation on intermediate supports. Always use Zammit Roofing fixing screws and weather seals.

“Trim-glas” sheets should be crest fixed on each rib at the ends and every second rib on the intermediate supports.

Long lengths (up to 6 metres) are available, but if joining two or more sheets lengthwise, the joins should be made over a batten or purlin, with a 150mm overlap.

When fixing fibreglass sheeting always work from planks placed over structural supports.

Cutting Sheets

Use a fine tooth handsaw or a power saw fitted with a masonry type cut-off blade. Support the sheet close to where you are cutting. It is good practice to wear protective goggles when cutting any material with a power tool. Zammit Roofing sheeting can be custom cut to any length on order, your supplier can arrange this if required.

Waste and sheeting off cuts should not be burned but disposed of with your household garbage or at the local waste centre.

Zammit Roofing Fixings

Screws for fixing “Corri-glas” sheets.?10g x 50mm self drilling Multi-drive (Hex/Phillips/Slotted) screws. Packs of 50 with 17mm weatherproof seals.

Screws for fixing “Trim-glas” sheets.?Type 17 screws (hexagon head self drilling for timber) 12g x 65mm, packed in 25’s with 19mm “Duranol” weatherproof seals.