Chimneys cause a surprising number of roof leaks in Hillingdon. Many homes here have brick stacks that have stood through decades of weather. This guide explains the chimney problems we see most often and how repointing and related repairs fix them. As local roofers covering Hillingdon, we see these problems often.
How chimneys let water in
A chimney has several weak points. The mortar joints between the bricks wear away over time. The flaunching, which is the mortar cap around the pots, cracks. In addition, the lead flashing where the stack meets the roof can lift or split. Any one of these lets water into the stack or the roof below.
What repointing involves
Repointing means raking out the worn mortar and replacing it with fresh mortar. First, we set up safe access to the stack. Then we rake out the old joints to a proper depth. Next, we repoint using a mortar that suits the age of the brickwork. Finally, we check the flaunching and flashings, because it makes sense to fix everything in one visit.
Other chimney repairs
Sometimes a stack needs more than repointing. For example, loose or cracked pots may need rebedding or replacing. Unused flues can take a cowl to keep rain and birds out. In more serious cases, a leaning or badly damaged stack may need partial rebuilding.
Moss, trees and gutters
Many Hillingdon streets have mature trees. Leaves and moss build up in gutters and valleys, and that can cause overflowing and damp walls. So we often combine chimney work with a gutter clear while the access is in place.
When to call roofers in Hillingdon
Call us if you notice damp patches on ceilings, slipped tiles or overflowing gutters. Also get in touch after a storm if anything on the roof looks out of place. Before any major changes, it is also worth checking the Planning Portal guidance on roof work.
Hiring roofers in Hillingdon
GNP Roofing Building Ltd works from Southall, so Hillingdon is usually around 20 to 25 minutes away for our team. We have over 15 years of experience and carry full public liability insurance. In addition, every job comes with a 10-year written guarantee. Our own team does the work, so we never subcontract. Every quote is also free, written and itemised.
Want roofers in Hillingdon to take a look? Contact us for a free written quote, or call +447424323113.