Roof repairs, new roofs, flat and pitched roofing across Harrow and the HA postcodes. Free inspection, honest written quote, no call-out charge.
Tell us about your roof. We usually reply the same day.
Alliance Roofing & Building works across Harrow providing practical roofing and small building works for homeowners, landlords and local businesses. From small leaks on a terrace in Harrow on the Hill to full new roofs on family homes in North Harrow, we look after every part of your roof, gutters and roofline so your property stays dry and protected all year round. We work across HA1, HA2 and HA3 and out to the surrounding parts of north west London.
We are used to working on everything from post-war semis to newer developments, and we understand how roofs in the area typically fail. That means quicker diagnosis, sensible recommendations and work that is completed properly rather than patched over. You deal directly with our small team from first visit to final clean up, and we treat every property as if it were our own.
If your roof is reaching the end of its life or constant repairs are starting to add up, we supply and fit complete new roofing systems, stripping the old coverings, checking the timbers and felt underneath and installing modern, correctly ventilated roofs to current building regulations. Storms and high winds can pull tiles free and leave your home exposed, so our emergency roofer service in Harrow can make your property safe and watertight by securing loose sections or fitting temporary coverings, then return to complete a permanent repair once conditions allow.
If your roof is reaching the end of its life or constant repairs are starting to add up, our team can replace the full system with a new, correctly ventilated roof. We strip the old coverings, check the timbers and felt, renew battens where needed and install modern tiles or slates chosen to suit your Harrow property. You receive a clear schedule before we start and a written guarantee once the work is complete.
We repair and renew pitched roofs across Harrow, from traditional clay tiles to modern concrete and slate. Common jobs include fixing slipped tiles, re-bedding ridge and hip tiles, renewing worn felt at the eaves and sorting problem valleys. If there are signs of movement or damp in the loft, we can investigate properly rather than just patching what is visible from the ground.
Flat roofs are often the first place leaks appear. We work on flat roofs over garages, extensions, porches and commercial units across Harrow. Using high performance felt, liquid systems or other suitable coverings, we make sure falls, outlets and edges are correct so water runs off instead of sitting on the surface. Where possible, we can overlay sound existing roofs to save you money without cutting corners.
If you notice a damp patch on a ceiling, tiles on the lawn or water dripping into your loft, you need a roofer who will actually find the source of the problem. Our roof repair team in Harrow attends to leaks, slipped tiles, split flashings, broken gutters and more. We investigate properly, take photos to show you what we find and explain the repair options in plain language so you can decide what is right for your home.
Storms and high winds can pull tiles free, damage flat roofs and leave your home exposed. Alliance Roofing & Building provides an emergency roofer service in Harrow to make your property safe as quickly as possible. We can secure loose sections, carry out temporary coverings and then return to complete a permanent repair or replacement once conditions allow. You will always know who is turning up and when.
Old timber fascias and soffits can rot, peel and become a regular maintenance job. We replace failing roofline with durable uPVC boards and trims that freshen the look of your Harrow property and protect the roof edges from water. While the boards are off we check the rafter ends, felt and fixings, dealing with any hidden problems so the new roofline has a solid base. Poorly fitted or blocked gutters can cause damp, staining and damage to paths and brickwork, so we also repair, clean and replace guttering and downpipes, making sure everything is lined correctly and securely fixed.
Leaking or loose chimneys are a common cause of damp patches around fireplaces and in bedrooms, so we re-point stacks, renew flaunching, replace broken pots and repair or replace lead flashings around the base. Spray foam insulation in lofts is causing problems for many Harrow homeowners when they come to sell or remortgage, so we carefully strip it back from the rafters and coverings, assess the structure beneath and install a breathable solution. We also offer gentle roof cleaning and moss removal, choosing methods that suit your tile type so small problems are spotted early.
★★★★★ 103 verified Checkatrade reviews
"Mitchell was the only roofer who actually climbed up to inspect the issue before quoting. The team were polite and conscientious and the work was completed to a good standard."
"Replacement of a flat roof. Mitchell and his team are smart, communicative, skilled, friendly and reliable. I would highly recommend their roofing services."
"New slate roof. The quality is superb, they were professional, punctual and communicative. The project finished on time and the site was left spotless."
Verified reviews from across our South East service area. Harrow references available on request.
Free inspection, no call-out charge, honest written quote, usually the same day.
