Dormer windows are a common feature on Redland's period properties, many of which have had loft conversions added over the years to make better use of upper floors. The flat or gently sloped roof section on top of a dormer is a small but genuinely important part of the structure, and when it starts to fail, homeowners often want to know whether EPDM rubber membrane is a suitable replacement material.
In most cases, yes, EPDM is well suited to dormer roof replacement, and it is one of the most commonly used materials for exactly this kind of application. Dormer roofs tend to be small and relatively simple in shape, which makes them a good match for a material that can be applied as a single, continuous sheet with very few, if any, joints, reducing the number of potential weak points on what is often a fairly compact area of roof.
Dormers also tend to be more exposed to the elements than a main flat roof at ground level, sitting higher up and often catching more wind and rain than surrounding sections of the property. EPDM's flexibility and resistance to UV degradation make it well suited to this kind of exposed, elevated position, where a less durable material like ageing felt might be expected to show wear more quickly.
The junctions around a dormer are where the real detailing work happens, and they deserve as much attention as the flat top itself. A typical dormer has several vulnerable points, the sides where the dormer roof meets its own cheeks, the front where it may meet a window head, and the back or sides where it ties into the main pitched roof of the house. Each of these needs to be dressed carefully in EPDM to create a genuinely continuous, watertight surface rather than a series of separate patches.
As with any re-roofing job, replacing a dormer roof properly means checking what is underneath the existing covering once it comes off. Dormer decking can be more vulnerable to hidden damp damage than people expect, partly because dormers are smaller and less visible than a main roof, and a slow leak can go unnoticed for a surprisingly long time before it shows up as a stain on a ceiling below.
Where decking on a Redland dormer is found to have deteriorated, it needs to be repaired or replaced before the new EPDM membrane is installed, rather than simply covering over a compromised structure. This is a particularly important step on dormers given how much of the surrounding structure, including window frames and cheeks, can be affected if water has been getting in for some time.
Done properly, an EPDM dormer roof should give many years of reliable, low-maintenance performance, coping well with the elevated exposure that dormers typically face while sitting neatly within the character of a period Redland property.
If you have a dormer roof in Redland that needs replacing or is showing signs of a leak, Brunel Roofing Bristol can inspect it, check the condition of the decking and junctions, and advise on a proper EPDM replacement.
Get a Free Quote for EPDM Roofing in Redland
Every roof is different — the fastest way to get an accurate answer is a quick chat with our team.