How to install polycarbonate roofing
To install polycarbonate roofing you should first decide which type of polycarbonate sheeting you want to use; twin-wall or multi-wall.
The best way to remember it is, the more layers it has, the more insulation it will provide, therefore the thicker the sheeting is, the more insulation it will provide. For example, 35mm multi-wall polycarbonate is going to provide considerably better insulation than 10mm twin-wall polycarbonate.
This will give you an idea of what thicknesses you will need:
-4-6mm – greenhouses, sheds and cold frames.
-10-16mm – lean-to canopies, commercial greenhouses and carports.
-25mm and 35mm – conservatory roofs.
You will also need a glazing system. Glazing bars are screwed along the centre of the joists, and the polycarbonate sheet is cut to fit between them and laid into place.
You should always make sure that the glazing system has room to compensate for expansion because polycarbonate sheets will change size depending on the temperature.
If it gets warmer the polycarbonate will expand and if it gets colder the polycarbonate will contract.
Polycarbonate is very strong and durable it can be easily cut to shape using a jigsaw, or circular saw that is fitted with fine-toothed blades.
To cut polycarbonate sheeting, ensure the panel is secure so that it doesn’t move, mark the required size on the cover film and cut the panel with the film still on the panel. Once cut you will need to clean away any dust with an air compressor or a vacuum.
If you decide to use polycarbonate for roofing or canopies you should consider the direction of the ribs of the polycarbonate when cutting and before installing.
This is to make sure that the ribs are running in the same direction with the pitch, which ensures consistency. They should be running in the direction of the slope.
Using the right sealant is very important. You should choose a non-hardening sealant, as other sealants could crack, discolour and make your polycarbonate brittle.
You should make sure that the polycarbonate sheets are the right way up! Polycarbonate sheets will only have one side that’s protected from UV, so you will need to make sure that side is facing up towards the sun.
If it’s installed the wrong way up you will not see the benefits of UV protection and this will cause withering and discolouration. The UV protection side is always under the branded film.
When installing polycarbonate roofing, keep a minimum pitch of 5 degrees so that rainwater runs off towards the gutter preventing moisture collecting on your roof.
Once the sheets are in place you can add end caps, remove the protective film, add fixing buttons and add a flash band if required.
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Post time: Mar-11-2022