Do Flat Roofs Always Leak? - An Expert's Perspective

Flat roofs are a popular choice for many homeowners, but they can be prone to leaks. While any roof can leak, flat roofs have the added challenge of having nowhere for the water to go but downwards. This means that moisture can seep into the roof itself and cause problems that can lead to mold and mildew. Blisters are another common cause of roof leaks, which occur when small air pockets form and become trapped under the membrane or between its layers.

When the sun heats the roof, these pockets of moisture and air expand and tighten the membrane, leading to further damage. Fortunately, there is a range of different waterproofing systems on the market that can help protect your flat roof from leaks. GRP (fiberglass), polyurethane, and single layer systems are all popular options. GRP is often preferred for its durability and extended lifespan of more than 30 years, while single layer systems provide waterproofness but are more susceptible to perforation. It's important to note that single layer warranties typically don't cover membrane damage caused by the customer.Clogged gutters are another major cause of flat roof leaks, as water overflows into the adjacent roof structure.

If you have problems with leakage in your roof, it's best to contact a high-quality roofing professional for repair. Modified bitumen roofs are among the most affordable options, although they are subject to cracking. Age also plays an important role in determining if it's time to replace the roof or if you can simply repair it. Small cracks and crevices should be repaired right away when you have a flat roof. We recommend choosing a flat roofing system with a warranty backed by insurance for added protection.

Roof coverings can also be used to avoid all kinds of common roof problems, from insulation to UV damage. It's also important to use a waterproof sealant when repairing leaky roofs. Unfortunately, no roof is immune to leaks, and that's why it's so important that your roof is as resistant to leaks as possible. Flat roofs don't last as long as pitched roofs due to their constant exposure to moisture and standing water. However, most flat roofs can be repaired with patches or roof repair kits if there are small defects or cracks.

It's also important to inspect your flat roof more often - twice a year is ideal - so that any issues can be identified and addressed quickly.