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Technical

When installing your Rooflight/skylight please ensure it isfitted with the correct fall to allow water to run off the glazing. The recommended gradient is 40mm for every 1000mm to run in accordance with the fall of your roof.

We advise if you have any concerns before you silicone the skylight glazing in place, a simple water test can be carried out by pouring water on the highest point of the skylight and look for any pooling as the water runs away

Installing flat rooflight - technical description

1.

Firstly measure out the area you wish to site your Rooflight /skylight, ensuring all the internal dimensions are correct with the product you have purchased. Now proceed to finish your roof covering up to the top of your easy fit kerb and joist/up-stand.
How to measure your rooflight - installation technical guide for roof light

2.

Position your timber upstand over the structural opening ensuring the internal face of the kerb are flush with your joist work/upstand. Note: When installing your skylight please ensure it is fitted with a slight gradient to allow water to run off the glass (The skylight must be set at a gradient or 40mm for every 1000mm run in line with the fall of your roof).
drilling Installation technical guide for roof light

3.

Measure out your fixing points on your timber upstand, Modern rooflights Ireland recommend a fixing every 400mm, drill and countersink your fixing points. Secure your upstand with your chosen fixing at the pre-drilled intervals, ensuring the head of screw does not protrude the rebated kerb.

4.

Now proceed to finish your roof covering up to the top of your easy fit kerb and joist/up-stand.

Roof covering Installation technical guide for roof light
applying sealant Installation technical guide

5.

Apply structural glazing silicone to both flat surfaces of the kerb and the corner of the rebated glassunit.

6.

Position the skylight glazing into the upstand (please note depending on the size you have purchased this may require up to six people on site) ensuring the step of the glazing is set inside the rebate of the upstand

Installation technical guide image

7.

Position the skylight glazing into the upstand (please note depending on the size you have purchased this may require up to six people on site) ensuring the step of the glazing is set inside the rebate of the upstand

8.

Position the skylight glazing into the upstand (please note depending on the size you have purchased this may require up to six people on site) ensuring the step of the glazing is set inside the rebate of the upstand

Installation technical guide for roof light