learn how to easy install your rooflight

Skylight Windows

Installation Guides

Based on a vision of bathing your spaces in daylight while ensuring privacy and enriching quality of life, Skylights.co.uk provides a comprehensive selection of superior skylights, roof lanterns, flashings, and all the necessary installation products. Welcome to our installation guide page, designed to assist you in seamlessly integrating our solutions into your projects.

Installation Video Guide
For Flat Roof

Planning to install on a flat roof? Our detailed video guide will provide you with step-by-step instructions for the process. With our straightforward and easy-to-follow steps, incorporating a skylight into your flat roof becomes a hassle-free task.

 

Installation Video Guide
For Pitched Roof

Installing on a pitched roof? Our comprehensive video guide will walk you through the process. With our easy-to-follow steps, adding a skylight to your pitched roof has never been easier.

STEP BY STEP

Installation Guide

Keeping in mind that our skylights’ dimensions refer to the size of the bottom (internal) glass panel, and that the top panel is stepped by 100mm on each side, the overall externally visible size is 200mm larger in both directions.

For instance, in this guide, we’ll show you how to install a 600mm x 600 mm Skylight. We provide installation sketches for other sizes separately in each size’s gallery.

The 600x600mm DOUBLE/TRIPLE GLAZED SKYLIGHT comes with the following sizes:

Your upstand should stick out at least 150mm above the roof level.

To avoid water collecting in the middle of the glass panel, a minimum pitch of 8-10 degrees relative to the horizon is needed (that means a 10cm fall for every metre of Skylight). Before applying the silicone, run a water test to make sure the water isn’t pooling (glass can still bend in the middle).

Your upstand opening should leave 5mm wiggle room on each side:

The internal distance from upstand to upstand should be 10mm more than the quoted skylight size
(in our example: 610mm by 610mm)

Skylight Support – provided By builder

The Skylight support is a 25x50mm (2”x1”) timber:

Set up the support so that the top of the support is: -Triple Glazed Skylight – 48mm below the top of the upstand

Weather the upstand

Cover the external face and top of the upstand with roof covering material:

Once you’ve finished weathering the upstand, you’re ready to install the Skylight.

Ensure all surfaces where the silicone will be applied are clean of dirt, dust, moisture, etc.

1.Apply the foam rope on top of the 2”x1” timber support to level off any irregularities which will prevent any pressure and stop cracking on the bottom glass laminated pane. THE WARRANTY WILL BE VOID IF A FOAM ROPE IS NOT USED.

2.Apply, a generous amount of weatherproof sealant on top of the upstand. Usually, 1 tube covers 6 linear metres.

3.Lower the skylight with suction cups, and make sure to evenly distribute the weight across the cups.

4.Apply waterproof sealant on the underside of the overhang and smooth it over again to ensure a watertight seal.

For a pitched roof, please follow the technical diagram provided:

*Regarding the silicones, we suggest the following products:

Black weather silicone – DOWSIL 791 Weatherproofing Sealant

DO NOT USE ACRYLIC SEALANTS!

Ensure you’re using the right silicones to install and weather tight your Skylight. We recommend the above products as fully compatible with our glazing unit silicones.

Using the wrong silicone can lead to discoloration, adhesion loss, and potential leaks due to a chemical incompatibility. It may also lead to depressurization of the glazing unit (allowing moisture to penetrate inside the glazing unit and cause internal condensation), weak bonding to the support structure, and poor weather tightness.

THE WARRANTY WILL BE VOID IF A FOAM ROPE IS NOT USED AND NOT PURCHASED FROM US.