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Although your roof isn’t always the most noticeable part of your home, its appearance says a lot about how well your property is cared for. Flat roofs are often built over extensions, and we have seen a massive increase in demand for home extensions. If these roofs aren’t properly waterproofed, it can cause so many problems and often damage which is costly to repair.
As autumn approaches, and level of dampness and rainfall increases, there isn’t a more important time to make sure your roof can withstand the elements – so here is our guide to ensuring your roof is waterproof before the winter.
Finding a leak in a flat roof
If your roof is leaking and have to put a bucket in the same place every time it rains, you’ll need to find out exactly where the water is coming from. The source of flat roof leaks can be hard to locate when you’re actually up on the roof, so a good tip is to figure it from inside the house. Measure the distance from the drip in the ceiling to the nearest wall. Then, when you’re on the roof, measure the same distance. This should help you to find where the water is getting in.
However, getting onto the roof to inspect it can be dangerous. If you are not sure that its safe to stand on the flat roof, then call a professional.
Another tip when checking your roof for leaks is to time it right – shortly after a period of rain. This will help you spot any issues. Checking the guttering for any malfunction is also recommended, as many roofing problems are as a result of gutter issues. Be sure that the guttering is free of dirt and debris.
How do you know what’s causing the problem?
Blistering – If you are noticing bubbles on our roof, this means that there are small pockets of air or moisture trapped beneath the membrane. As the sun heats the membrane, these pockets can expand and stretch the membrane. If the membrane is still intact and together, then leave the blisters. If the blister pops and breaks the membrane, you can apply a patch repair. Our tub of Soudagum hydro waterproof repair coating is fantastic for this.
Alligatoring – A funny word, but not so funny when you notice you have it on your roof! Alligatoring is when your roofing membrane starts to crack up and look a bit like an alligator’s skin. This is when sun damage has cracked up the coating – and yep, you guessed it – the cracks and splits can allow a lot of moisture in, which can cause havoc. But don’t worry, just coat the cracked area with our Soudagum hydro waterproof repair coating – its perfect for this issue too!
Ponding – If a puddle sits on your flat roof for over 48 hours without draining, it is known as ponding. This is quite common on flat roofs, but it can lead to over-stressed membrane, which allows moisture to get in. Keeping the gutters clean and clear of blockages is crucial to reduce ponding.
Lead waterproofing
Lead’s flexibility lends itself to give excellent sealing properties when used with the correct neutral cure sealants – like our Lead Sealant. Wherever there is a join between two surfaces, lead can provide a great seal. Lead can also be used as a covering for guttering too, helping make a roof 100% water-tight. A good quality, lead roof is said to be able to last as much as three times longer than other roofing materials. This is why many historic buildings and monuments have lead roofing – it is reliable, durable and a cost-effective option.
Butyl flashband
Our butyl flashband is a rubber-based sealing tape which provides a fast and excellent adhesion to many substrates. It is flexible even when cold, UV and weather resistant – keeping moisture out. Its super easy to install as it is a self-adhesive product. Butyl flashband is a perfect sealing solution for sealing around chimneys, air vents, skylights, window sills and sliding doors. Or repairing areas where previous membrane has worn away – just tape it up with this excellent universal sealing and repairing tape.
If you are needing any more information on our waterproofing products, please pop into one of our trade counters and one of our helpful staff members will be able to assist you. Alternatively, give us a call on 0345 021 3333 or pop us an email.