Greater London · England
Window & door mastic in West Heath, Greater London
Mastic around window and door frames, sills and patio doors for homes and businesses in West Heath and across Greater London. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Gaps where the sill meets the wall
- Gaps left after new windows were fitted
- Damp patches on the reveal after heavy rain
Window mastic in West Heath
Every window and door frame has a gap around it, and mastic is what closes it. Once that seal fails, wind and rain find the gap. Our applicators cut it out and replace it with a flexible, weatherproof sealant. Common call-outs are for white mastic on grey or black frames and draughts coming in around windows and doors, across aluminium frames, composite doors and timber windows & doors.
Much of London’s older housing was built with timber sash windows, some still in place and some long since replaced. Either way, the mastic between frame and brickwork is what stops draughts and rain getting in.
There’s a 12-month guarantee on every job, whatever its size.
- Location
- West Heath (DA7, DA16, SE2)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Quotes
- A clear price before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Landlord and commercial work in West Heath
In hotels, rooms out of use cost money, so we plan the work room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
Letting agents often deal with us directly. Tell us the address, the job and how access works.
What we do, step by step
Once we are on site, we check the joints match what you told us. If anything is different, we explain it before carrying on. After that, the work takes a few hours for a few frames, or a day or more for a whole house. For a job in West Heath, parking and access are the things to plan: tell us about permits, visitor bays or off-street space, which floor we are working on and whether there’s a lift.
- We check how each frame can be reached safely.
- All the failed sealant is cut away.
- The surfaces are cleaned and left dry, and primed where the sealant calls for it.
- Backing rod fills deep voids and the sealant goes in on top.
- We tool the joint so water runs off, then clear up.
Getting ready for the visit
- For indoor joints, keep the area dry beforehand if you can
- Let us know about stairs, lifts or work at height
- Let us know about earlier repairs to the joints
Ask for a quote
Every job is quoted individually. Simply call 0345 464 0079 or send us an email and describe the job.
Advice
Why it’s worth doing now in West Heath
Getting a straight, even bead on an outside frame takes practice, especially on upper floors. We cut out properly, back deep gaps and tool every joint neatly, using a product chosen for the frame and wall. In a London flat, a failed joint rarely stays your problem alone: water can reach the neighbours below, and gaps in fire-rated joints affect the whole building.
Instead of a standard rate, we price the job in front of us: how many joints, what’s in them now and how we reach them. You will know the price before we begin.
What you get with us
- 12-month guarantee on every job
- 180+ five-star Google reviews
- Any old sealant cut out fully, not covered over
- Anti-fungal silicone where joints get wet
Read our cost guide or our reviews.
Your questions about window mastic in West Heath
I let a flat near Abbey Wood station. Can you help?
Yes, landlords and agents are among the people we work for. Just ring 0345 464 0079 or send us an email with the address and what needs doing, and we’ll give you a clear price.
Is parking a problem for a job in West Heath?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. The visit is then planned around what’s available.
What do you put in the joint?
We choose the sealant for the joint, not the other way round. Movement, water and weather all affect the choice.
Do you have sealant for grey or black windows?
Yes, we choose a colour to suit the frame. Anthracite grey, black, brown and white cover most frames, with clear as an option.
Do you work on first-floor windows?
Yes, if safe access is possible. Higher or awkward frames may need extra access, and we’ll confirm what’s needed.
Are you fully insured?
Yes. We’re fully insured.
Do you do commercial work?
Yes. Commercial and hotel work is a large part of what we do. Working times can be discussed when we quote.
How many windows can you do in a day?
Allow anything from an hour or two to a full day, depending on how many frames there are. Access and the amount of old mastic make the biggest difference.
Also near West Heath
Also in West Heath
Surface by surface
Composite doors
Draughts round the door leaf usually come from worn seals or adjustment, not the mastic. We seal the frame and let you know about anything else.
Timber windows & doors
Soft or rotten wood can’t be sealed successfully. If we find rot, we will tell you before going ahead, as that’s a job for a joiner.
West Heath homes and the weather
Historic houses like Danson House (about 1.5 miles south) are a reminder that the area around West Heath has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window. In London conversions and blocks, the lease decides who is responsible for the frames, so it’s worth checking before booking.
Homes close to St Andrew's include some older properties, and replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. For site and facilities teams at buildings such as Hillsgrove Primary School, larger buildings have plenty of frames, and the mastic around each one ages. West Heath is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
West Heath is about 1 mile north-east of Welling, in Greater London. Wherever you are in the DA7 postcode area, we cover window mastic for homes and businesses. We cover 764 towns and villages across Greater London, from the larger towns to small villages. You can also see our page for London, about 10 miles away.
All of DA7, DA16 and SE2 is within our area for window mastic, from the main roads to the quietest streets. If you need window mastic at a property on Hurst Lane, Hadlow Road and Denton Road or anywhere close by, our applicators can take on the job. You will find West Heath on the A206, which makes it straightforward to reach. Other places close to West Heath include Abbey Wood (1 mile north-west), Crook Log (1 mile south), Lessness Heath (1 mile north-east), Upton (1 mile south) and Bexleyheath (1 mile south-east). Within a short drive, we also cover London (10 miles west), City of Westminster (12 miles west), Marylebone (12 miles west), Kensington (14 miles west), St Pancras (11 miles west) and Shoreditch (9 miles west).
Around West Heath
We work in homes and buildings around Co-op pub, Lesnes Abbey Woods and Welling School and the streets around them. The closest station to West Heath is Abbey Wood station, roughly 1 mile north. A little further out are Broadway Shopping Centre (1.7 miles south-east) and Bexley Hospital (1.4 miles south). For a walk, there’s Crossness Nature Reserve.
Should I try it myself first?
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it does not work out, we can still put it right.
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
Keeping the joints in good condition
A little care helps the new joints last. Our advice:
- Keep timber frames painted
- Keep jet washers away from the mastic
- Wipe condensation off the frames
- Do not paint over the silicone
Timber frames need their paint kept up, because bare, wet timber moves more and pulls at the joint. Keep paint off the silicone itself.
Draughts get worse, not better. As old mastic keeps shrinking, the gap widens, and heat escapes around the frame. A new joint closes it up.
Quotes for window mastic in West Heath
You will get a clear quote before we start. It takes into account:
- The number of rooms or windows
- The number and length of the joints
- Mould in or behind the old joints
- Whether old sealant or filler has to be cut out
No two jobs are quite the same, so we quote each one individually. Size, access and the product the joint needs all make a difference.
Asking for a quote
What to tell us when you ask for a quote:
- If someone has resealed it before
- Photos by email, if that’s easy
- How we’d reach the joints
- If it’s domestic, commercial or a hotel
There’s no standard price list, because every job is different. Instead, we give you a clear price for your job. To arrange one, call 0345 464 0079 or email us.