Dormer roofs are a popular feature in many homes, adding space, character, and natural light to upper floors. However, because of their complex structure and the way they join with the main roof, dormers can sometimes be more vulnerable to leaks than other roof types. At MCM Roofing Repairs Hook, we regularly help homeowners in Hook who are struggling with persistent leaks around their dormers. Here are seven of the most common causes.
Faulty Flashing Around the Dormer
Flashing is designed to create a watertight seal where your dormer roof meets the main roof slope. If the flashing is poorly installed, corroded, or has come loose, water can easily penetrate the join and make its way inside.
Damaged or Missing Tiles
Loose, cracked, or missing roof tiles around the dormer can allow rainwater to seep in. This is particularly common after storms or heavy winds, where debris can dislodge tiles near the dormer opening.
Blocked or Failing Gutters
Dormer windows often have small gutters or channels to help direct water away from the structure. If these are clogged with leaves, moss, or dirt, water can overflow and pool around the dormer base, eventually seeping into the roof space.
Poorly Sealed Dormer Windows
If your dormer includes windows, the seals around the frames can degrade over time. Gaps in the window caulking or cracked putty can allow water to get behind the frame and into your interior walls.
Inadequate Roof Pitch
Some dormer roofs have a pitch that is too shallow to allow rainwater to run off effectively. This can lead to standing water, which increases the risk of leaks and accelerates wear on roof coverings.
Ageing Roofing Materials
Like any part of your roof, dormer roofing materials have a finite lifespan. Felt, tiles, or slates that are decades old may simply be too worn to keep water out effectively.
Hidden Structural Issues
Sometimes leaks are caused by problems you can’t see, such as timber rot beneath the dormer, degraded underlay, or a sagging roof deck. These issues can allow water to bypass the outer layer and cause damp patches inside.
Conclusion
Dormer leaks can be frustrating, but identifying the source quickly is key to avoiding more extensive damage. MCM Roofing Repairs Hook provides expert dormer roof inspections and repairs in Hook, ensuring your roof remains watertight and your home protected. If you’ve noticed damp patches, peeling paint, or dripping water near your dormer, it’s time to have it assessed by a professional.
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