Surrey · England
Westhumble Window Mastic
Problem with your window and door frames in Westhumble? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Draughts coming in around windows and doors
- Cracked internal joints between frame and plaster
- Mastic that has split away from the wall
What the job involves on each surface
Aluminium frames
Coated aluminium needs a compatible sealant, and acetoxy silicones are not used, as they can attack some metals. We use a neutral-cure product.
Timber windows & doors
Older timber windows in stone or brick can suit sand mastic rather than modern sealant. We can talk through the options.
About our window mastic in Westhumble
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. We work on patio & French doors, uPVC windows and window sills, and the jobs we see most are cracked or shrunken mastic around the frame and draughts coming in around windows and doors.
In a village or hamlet like Westhumble, older cottages and farmhouses often have timber windows set in stone or brick. Older buildings like these do not always suit modern silicone, so the sealant has to be chosen to suit the building.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we will sort it.
- Location
- Westhumble (RH5)
- Region
- Surrey
- Guarantee
- 12 months on all our work
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
FAQs for Westhumble
I let a flat near Box Hill & Westhumble station. Can you help?
Yes. We work for landlords and agents as well as homeowners, and several properties can go on one quote. You can phone 0345 464 0079 or email us with the details for a clear quote.
Do you cover Westhumble for window mastic?
Yes. Our work covers London and the South East, and Westhumble is part of that. Just call 0345 464 0079 or send us an email with a few details of the job.
Do you hold any approvals?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
What should I tell you?
Only a few details: the address or postcode, what’s wrong and any access issues. After that, simply phone 0345 464 0079 or email us.
Do you remove the old sealant?
Yes. Sealing over old sealant is the main reason resealing fails early, and it’s something we never do.
Are you fully insured?
Yes. Full insurance covers our work.
Can you seal the gap between the frame and the plaster indoors?
Yes. The outside joint keeps the weather out, and the inside joint stops draughts and finishes the reveal. We can do either or both.
What does window mastic cost?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. You’ll get a clear quote before work begins.
Landlords, agents and businesses in Westhumble
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we’ll give you a quote.
Failed sealant is one of the commonest items on a check-out report. We can quote for more than one property at once.
What happens on the day
A visit follows a simple pattern: we check the joints, mask and protect the surrounding surfaces, do the work and clear up. Most jobs take a few hours for a handful of frames, longer for a whole house. Somewhere like Westhumble needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- 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.
Before we arrive
- Tell us about access, such as stairs, a lift or high-level joints
- On commercial sites, let us know about site rules
- Let us know about earlier repairs to the joints
Ask for a quote
Quotes start with a quick conversation. Describe the problem, the location and the size of the job. Whenever you are ready, phone 0345 464 0079 or send us an email.
Advice
Do you need window mastic in Westhumble?
Timber windows bring their own problems. Old mastic gets painted over and cracks under the paint, and the wood moves with damp as well as heat.
Signs it’s time to call us include:
- Whistling draughts around closed windows
- Cracked sealant at the sill ends
- Rain getting in at the frame or under the sill
- Cracked or shrunken mastic around the frame
For an older house near a landmark such as Church of St Michael, the joint between an old wall and a newer frame is generally the first place rain gets in.
What your quote should include
- How hidden problems are handled
- How the surfaces are prepared before sealing
- How much experience the applicator has
- Whether they seal over old material or remove it
Keeping the joints in good condition
Good habits help new joints last longer. Our tips:
- Make sure the drainage slots are not blocked
- Avoid harsh chemicals near the mastic
- Do not paint over the silicone
- Wash the frames with mild soapy water
Timber frames need their paint kept up, because bare, wet timber moves more and pulls at the joint. Paint up to the joint, not over the silicone.
A failed joint lets water into the wall a little at a time. You might not see it until plaster blows or a damp patch appears inside. Catching it early keeps the fix to a reseal.
Why act early in Westhumble
Getting a straight, even bead on an outside frame takes practice, especially on upper floors. A professional job is cut out properly, backed where needed and finished neatly, using a product chosen for the frame and wall. Where a wall is exposed, as many are in small places like Westhumble, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
The cost reflects the work involved, not a rough estimate. That’s why we ask about the job first and agree the price before starting.
What you get with us
- A 12-month guarantee on all work
- More than 20 years in sealant work
- Arbo and Everbuild products
- Neat joints and a tidy finish
Take a look at our cost guide and our reviews.
Should I try it myself first?
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
A DIY attempt doesn’t rule out a professional job. We remove it and do the joint properly, so just mention it when you contact us.
Frames and glazing around Westhumble
Historic houses like Polesden Lacey (about 1.8 miles west) are a reminder that the area around Westhumble has older buildings as well as new. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Schools such as The Ashcombe School are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages. If you let a flat or house near Box Hill & Westhumble station, sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Westhumble is about 2 miles north of Dorking, in Surrey. Homes, rented property, offices and hotels in Westhumble can book us for window mastic, old or new, large or small. The work is guaranteed for a year. Our Surrey coverage runs to 395 places, Westhumble among them. You can also see our page for Crawley, roughly 12 miles from Westhumble.
Work in RH5 is quoted and booked the same way as anywhere else. We cover properties on Adlers Lane, Chapel Lane and Burney Road and the roads around them. Neighbouring places we cover for window mastic include Pixham (1 mile south-east), Mickleham (1 mile north-east), Ranmore Common (2 miles south-west), Dorking (2 miles south) and Westcott (2 miles south-west). We also work in nearby towns such as Guildford (10 miles west), Woking (11 miles north-west), Epsom (6 miles north-east), Horley (9 miles south-east), Redhill (7 miles east) and Ewell (8 miles north-east).
Near you in Westhumble
Locally, jobs take us to homes and businesses close to Norbury Park, Stepping Stones pub and Pippbrook House and the streets around them. There’s a railway station in Westhumble itself: Box Hill & Westhumble station. Nearby you’ll also find Headley Court (3.6 miles north-east) and Betchworth Castle (1.9 miles south-east). The countryside around Westhumble includes Box Hill and Reigate Heath.