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Polycarbonate Greca Roofing Sheet - Durable, UV-Protected Roofing Solution for Outdoor Structures

Solasafe Polycarbonate Roofing Sheet Colors with Light and Heat Transmission Levels - Clear, Opal, Lt. Bronze, Grey

Polycarbonate Greca Roofing Sheets

Name: Polycarbonate Greca Roofing Sheets
Brand: COLORBOND
SKU: 297
Price: 27.00 AUD
Availability: InStock

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Greca Polycarbonate Roofing Sheets

Ampelite SOLASAFE® polycarbonate in the Greca profile: a square-rib trapezoid that suits pergolas, patios and carports where you want a cleaner line than corrugated. Blocks 99.9% of UV. Cut to your length from 1.8m to 8.1m in six colours.

To order: select your colour and length above, then add to cart.

Product information

Greca, corrugated or 5-rib?

Greca is the square-rib profile: flatter pans and sharper lines than corrugated, same 5° minimum pitch. It doesn't lap into COLORBOND® corrugated or TRIMDEK® steel, so pick it for a standalone structure, not for skylights in a metal roof. For a roof that has to match TRIMDEK® steel or go flatter than 5°, use TRIMDEK® profile polycarbonate.

Which colour do I want?

Light and heat don't track together. Opal lets in more light than Light Bronze and blocks more heat than Grey. Ampelite figures:

Colour	Light in	Heat in	Max length
Clear	91%	85%	8.1m
Opal	55%	40%	6m
Smooth Cream	44%	35%	6m
Light Bronze	36%	61%	8.1m
Grey	26%	50%	8.1m
Dark Tint	17%	39%	8.1m

For the heat-reflective sheet in hot climates, see Level 3 HR1 Greca.

What are the sheet specs?

Effective cover 760mm, one-rib side lap, two ribs in exposed or high-wind sites. Minimum roof pitch 5°. Maximum purlin spacing 800mm at sheet ends, 900mm mid-span. Length tolerance ±10mm. Made to AS/NZS 4256.5, installed to AS 1562.3, fire tested to AS 1530.3, and rated for BAL-12.5 and BAL-19 verandahs, carports and awnings separate from the house. Not for industrial use. Sheets needed: roof width ÷ 0.76, rounded up.

How do I fix it?

UV side up. One side only is UV protected. Fit it label side up or it will yellow and the warranty won't cover it. Run anti-noise tape along every batten first. Fix every second rib with 50mm x 14g polycarbonate screws and 26mm dome washers, through pre-drilled holes. Don't overtighten. Finish the ends with Greca foam infill. Cut with a fine-toothed blade.

How long does delivery take?

Each sheet is cut after you order. Delivery takes approximately 3 to 7 working days, depending on location. Store sheets flat in the shade with nothing stacked on top.

What warranty does it carry?

Ampelite lifetime warranty against excessive discolouration of clear sheets and loss of light transmission on all colours, plus 10 years against sheet fracture from hailstones up to 25mm in high wind, domestic use only, replacement material only. Conditions apply, including correct installation with the UV side up.

Laying Greca the right way

The UV protection is on one face only. Lay the sheet with the printed label facing the sky and it lasts the life of the warranty; lay it upside down and the unprotected face yellows in a couple of summers. Start laying from the end opposite the prevailing weather so each side lap faces away from the wind and rain.

Polycarbonate expands and contracts more than steel. That is why the fixing holes are drilled oversize (10mm up to 4.2m, 12mm to 8.1m) and why the screws use a 26mm dome washer rather than a standard hex washer.

Fit 25mm x 3mm anti-noise tape to every purlin before the sheets go on. It stops the creak as the sheet moves over the timber and is cheap insurance against callbacks.

Clean with a soft cloth or sponge, mild detergent and cold water. No abrasives, no solvents, no pressure washer. Greca is rated for domestic patios, pergolas and carports (AS/NZS 4256.5, BAL-12.5 and BAL-19); it is not covered for industrial or chemical environments.