Laserlite sheets are easy to install.
But it’s always helpful to have a few extra tips to make the job even easier and make sure it’s done right.
So, we’ve put together the ultimate Laserlite Guide for you! It’s the Official Laserlite Installation Guide (linked below) + a few extra tips we’ve gained over our 25+ years experience as roofing consultants.
You’re welcome! 🙂
Laserlite Corrugated, Greca and Trimdek sheeting is designed to be installed at a minimum pitch of 5 degrees. This means that the sheet should fall 88mm vertically for every meter horizontally, as a minimum.
Having more pitch can be beneficial in keeping maintenance to a minimum, as the sheets will naturally ‘self-clean’ better in rain.
There are a limited number of Laterlite polycarbonate flashings available. And clear polycarbonate flashing is the only option. For this reason, Laserlite polycarbonate roof sheets will often be paired with colourbond flashings. As the pans of Laserlite polycarbonate can not be turned up to assist with waterproofing, closed foam ‘infills’ are available to be used with flashing to ensure that you can achieve a waterproof finish.
Purlin tape (sometimes called noise tape) can be used under Laserlite polycarbonate sheets. It sticks to the purlins to reduce the creaking and cracking that occurs as the polycarbonate expands and contracts. Purlin tape is particularly recommended for painted timber structures.
Back Channel is a Colorbond C section used with a closed cell foam at the top edge of the sheet to assist with weather proofing when installing the sheets against a wall. The foam allows for expansion of the sheet. This is particularly helpful when there is a tight clearance for the end of the sheet (often under an eave).
As Laserlite polycarbonate sheets expand and contract as they heat and cool, an oversized hole is required for each screw. This allows the sheets to move during expansion and contraction. These holes (usually 10mm in diameter) can be drilled with a drill prior to screwing. Alternatively, the ONESHOT branded screws available with Laserlite products will cut the hole as the screw is driven in, saving time and effort. This type of screw is designed to be used in the CREST (high part) of the sheet.
Generally, you need to be cautious using silicones on polycarbonate products. There are two main reasons for this. The first is that polycabonate sheets will expand and contract a lot more than other materials. This means that silicones often don’t last and can sometimes damage the sheets as they tear apart. Secondly, some silicones are not compatible with polycarbonates. If you need need to use a silicone on Laserlite polycarbonate it must be acid-free or neutral cure.
Laserlite sheets will have an effective coverage of 760mm in width. This allows for the overlap between sheets already.
For example, if you you have a structure that is 8.0m wide, you need to divide 8.0 by 0.76m. This would mean that you need 10.53 sheets. Which of course means you’ll need to round up and order 11! 😉
We can help you work out sheet coverage. Contact us for a QUOTE.
We offer a free cutting service when you order your Laserlite polycarbonate sheets. If you are cutting on site, a fine tooth circular saw is the recommended method. If you only have a small amount of polycarbonate sheet to cut, you may find it easier to use a solid pair of scissors or sheers.
Any Corrugated, Greca or Trimdek sheet must be installed on purlins (sometimes called battens). These will run across the sheet.
The distance between the purlins are referred to as spans. In normal conditions, spans are broken into end spans and mid spans – see below image for reference.
It is important not to exceed the spans below. In high wind areas these spans will need to be smaller. The spans can be found in the official installation guide (linked below).
Always store Laserlite polycarbonate sheets flat and in the shade. The sheets will usually be delivered rolled (like a cigar). It’s ok to keep them rolled if you are doing your job in the next few days (but make sure they are stored in the shade, not left out in the sun!). Any longer and they should be stored flat. Make sure that they remain dry and are never stored wet.
Cleaning is best done with warm soapy water, rinsed off thoroughly. Don’t use abrasives on the sheets as they will scratch.
Be sure to read the Laserlite Installation Guide in full. It outlines the step by step process of screwing the sheets to your structure. If you have any further questions about what is required to install your Laserlite polycarbonate sheets to specification, don’t hesitate to contact us. We’re here to help!
If you are looking for a QUOTE on Laserlite polycarbonate sheets you can fill out the form here and we’ll get back to you.
We have one of the most extensive range of polycarbonate products in Australia. Our team of experts are second to none and can advise you on the best solution for your project.TALK TO AN EXPERT