Skylights are a long-term investment. However, they’re not indestructible, so cracks, leaks, and damage can leave you requiring a replacement.
Or, maybe you just want to update to a new design or redecorate your home. Whatever the reason, replacing and installing a new rooflight can be time-consuming and overwhelming.
Luckily for you, we’ve created a simple guide to walk you through each step of replacing a rooflight so you can enjoy a professional finish from home. So, let’s dive into it!
Preparing for Installation
Before you begin any home renovation project, you have to consider your needs, design preferences, and safety.
Size and Shape
Using a tape measure, measure the length and width of your current rooflight. Use these measurements to find a new rooflight that matches these dimensions for a seamless fit.
You could opt for a different shape that matches the dimensions of the previous rooflight, for example, a domed rooflight or lantern rooflight, or stick with the same design. If you want to improve ventilation, opt for an opening rooflight.
Glazing Options
With a variety of glazing options available, you can choose between double or triple glazing for better insulation or self-cleaning glass, which reduces maintenance needs.
Tinted glass can help to reduce solar glare, reducing the amount of sunlight that enters the home. If you want to create a layer of privacy in a bathroom, frosted or textured glass is ideal for blocking out the view from outside.
The Necessary Tools and Equipment
Once you have decided on your new replacement, you will need to ensure you have the following:
- Tape measure
- Spirit level
- Circular saw or handsaw
- Utility knife
- Power drill and bits
- Screwdriver
- Ladder
- Fasteners
- Flashing tape and roofing sealant
Optional
- Timber for kerb (flat rooflights)
- Power source, wiring tools, and rain sensors (electric opening rooflight)
- Fixing brackets (for large rooflights)
PPE: When working with power tools and sharp equipment, wear safety goggles, non-slip footwear, and gloves.
Structural Assessment
Before you begin any physical work, you must check whether your roof can safely support the new installation.
If you have a timber roof, assess the material for any signs of rot, structural weakness, or insect damage. If your roofing material is nearing the end of its lifespan, replace it before installing your rooflight to prevent any issues in the near future.
To check the structural integrity of your roof, measure the spacing and depth of the timber joists, which are spaced typically 400mm to 600mm apart in UK homes. This will show whether your roof can withstand the load of your new rooflight.
For this, a structural engineer will be able to determine if your roof can handle a larger or heavier rooflight and if any reinforcements are needed.
Installation Process
Once you have agreed on a design and completed the structural assessment, you’re now ready to replace your rooflight.
1. Remove the Old Rooflight
Taking extra caution so as to not damage the roof, carefully detach the existing rooflight.
To do this, unscrew the fastenings or cut through the old flashing and sealant. Then, remove the window, holding it carefully to prevent it from dropping.
2. Prepare the Aperture
Once you’ve removed the old rooflight, clean the aperture with a cloth and detergent to remove any dirt and dust.
As you do this, inspect the structure for any damage, addressing anything you notice immediately. If your new rooflight is bigger than the old one, cut or reinforce the opening to adjust it to fit the new window.
3. Install the Builder’s Kerb (for Flat Rooflights)
If you’re installing a flat rooflight, you will need to add a builder’s kerb. This timber frame will create the correct pitch for water runoff, preventing a buildup of water and potential leaks.
To do this, use the proper fasteners to secure the kerb to the roof structure. Make sure it’s securely fastened to provide the rooflight with a sturdy foundation.
Then, add insulation around the builder’s kerb to reduce heat loss and increase your home’s thermal efficiency.
4. Position the New Rooflight
Once the builder’s kerb has been placed, if necessary, position your new rooflight in place.
Then follow each step in our rooflight installation guide for a thorough step-by-step of the process.
5. Seal and Waterproof
Once you have securely installed the new rooflight in place, apply flashing and sealants around the structure.
Place the flashing around the edge of the rooflight to prevent water ingress and ensure your rooflight remains intact throughout harsh weather conditions.
Then, apply a roofing sealant around the edges of the flashing and rooflight to ensure all gaps are sealed.
Choose TuffX for your Rooflights
At TuffX, we provide a wide range of high-quality rooflights, ensuring a seamless and aesthetic finish every time.
Designed from toughened safety glass, our rooflights can withstand even the harshest weather conditions and tough force, ensuring a long-lasting installation.
With a variety of framed and frameless rooflights available, we have everything you need for a high-performance home.