Surrey · England
Window & door mastic in Cobham, Surrey
Window and door frames in Cobham need attention? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Sealant in the wrong colour for the frame
- Damp patches on the reveal after heavy rain
- Gaps left after new windows were fitted
How we handle window mastic in Cobham
There are two joints on most windows. Outside, the mastic keeps rain out; inside, the joint between frame and plaster stops draughts and tidies the reveal. Either or both can be done. We work on composite doors, aluminium frames and timber windows & doors, and the jobs we see most are mastic that’s falling out in pieces and gaps left after new windows were fitted.
In smaller places like Cobham, homes range from older cottages to newer houses, with windows to match: timber, uPVC and aluminium. The right sealant depends on the frame and on what it sits in.
A one-year guarantee comes with the work, just as it does everywhere we cover.
- Place
- Cobham (KT11)
- Region
- Surrey
- Cover
- A year, on every job
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
When to call us in Cobham
Water runs down the glass onto the sill, so the sill ends and the joint below the frame are common leak points. Failed sealant there lets rain into the wall or behind the frame.
Keep an eye out for these signs:
- Gaps where the sill meets the wall
- Cracked internal joints between frame and plaster
- A bead that does not match the frame
- Rain getting in at the frame or under the sill
In the older streets around Church of St Andrew, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Questions to ask before you book
- What product goes in the joint
- How the colour is chosen
- How long to leave it before use
- How the joint is cleaned and prepared
Places near Cobham
Also in Cobham
What window mastic looks like in Cobham
With historic houses such as The Homewood (about 1.2 miles north) nearby, there’s older building stock in the area around Cobham as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you let a flat or house near Cobham & Stoke Dabernon station, sound mastic around windows and doors keeps out the draughts and damp that tenants notice first. Schools such as St Andrew's CofE Primary School are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages.
Cobham is about 6 miles west of Epsom, in Surrey. Cobham gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a 12-month guarantee. Our area takes in 395 places across Surrey, from the larger towns to small villages. For nearby work, see our London page, about 17 miles away.
We work across the KT11 postcode area for window mastic. Whether your property is on High Street, Summerhays and Fairfield Park or a nearby road, we can help. Neighbouring places we cover for window mastic include Stoke D'Abernon (1 mile south-east), Oxshott (2 miles east), West End (2 miles north), Pachesham Park (3 miles east) and Esher (3 miles north-east). Larger places within reach include Guildford (10 miles south-west), Woking (8 miles west), Camberley (14 miles west), Epsom (6 miles east), Horley (15 miles south-east) and Redhill (12 miles south-east).
What’s near Cobham
Typical jobs here are in homes near The Running Mare pub and West End Common. The nearest railway station is Cobham & Stoke Dabernon station, roughly 1.1 miles south. A little further out are Elmbridge Museum (3 miles north-east) and Chessington Castle Hill (4.9 miles east). Open spaces near Cobham include Jubilee Wood and Claremont Lake.
Why it’s worth doing now in Cobham
If you’re painting or rendering, reseal at the same time. Fresh joints finish the job neatly, and it’s easier while the walls are being worked on anyway. In a smaller place like Cobham, wherever a wall is exposed, a failed outside joint is a real source of damp. Inside, a split seal lets water into floors and panels just as it would anywhere.
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you’re unsure, call 0345 464 0079 or send us an email and we’ll give you an honest view and a quote.
Why us?
- Domestic, commercial and hotel work
- Old sealant always removed completely
- Over 20 years’ experience
- Every job guaranteed for a year
See our cost guide or what customers say.
What affects the quote in Cobham
Your quote is based on your job. We look at:
- Which sealant suits the joint
- Any mould that needs treating
- The old material and how stubborn it is
- Any working-time requirements on site
A few things move the cost up or down: the old material and how easily it comes out, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
Helping us quote
When you call or email, these details help:
- Pictures of the joints, sent by email
- Any access issues, like height or stairs
- Whether it has been sealed before
- The type of property
We don’t publish a price list, as no two jobs are quite the same. Instead, we send you a clear quote for your job. To arrange one, ring 0345 464 0079 or send us an email.
Your questions about window mastic in Cobham
Is Cobham in your area for window mastic?
Yes, Cobham is within the area we cover. Our work covers London and the South East. Just ring 0345 464 0079 or drop us an email with a few details of the job.
I let a flat near Cobham & Stoke Dabernon station. Can you help?
Yes, rental work is part of what we do. You can call 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before we start.
Where do you work from?
We work from Crawley. Our applicators cover Cobham, along with the rest of our area.
Do I have to be there?
Access is agreed with you when the job is booked. For inside work, that normally means someone being in.
Do the sealants smell?
Possibly a little. It fades as the sealant cures.
Do you work for hotels and businesses?
Yes. We have worked for hotels, offices and other businesses.
Which products do you use?
Quality sealants from brands including Arbo and Everbuild, picked for each joint. We explain the product when we quote.
How much does window mastic cost in Cobham?
Size, access and the old material all affect the cost. Ask us for a quote and we will talk you through it.
What happens on the day
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. For most jobs that takes a few hours for a handful of frames, longer for a whole house and we leave things clean and tidy. For a job in Cobham, we agree the time, the access and parking before the day. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- Each frame is looked over and we agree which ones need resealing.
- The old mastic is cut out and scraped back to clean surfaces.
- Where the gap is deep, backing rod goes in first.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- Every joint is tooled smooth and checked before we leave.
Before we arrive
- For indoor joints, keep the area dry beforehand if you can
- Mention any tricky access
- On commercial sites, let us know about site rules
How to get a quote
Call for a quick quote, or send an email if you’d rather. Describe what needs sealing and we will explain what’s involved before giving you a price.
Advice
Work for landlords, hotels and businesses
For anyone letting property in or around Cobham, jobs at different addresses can be quoted together. Just tell us the addresses and what each one needs, and pictures by email help.
Whether it’s one flat or a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
What the job involves on each surface
Patio & French doors
Not every patio door leak is a mastic problem: worn seals, blocked drainage slots or a poor threshold detail can be the cause. We check before we reseal.
Composite doors
A composite door usually sits in a plastic outer frame, and the joint around it is sealed like a window. We match the colour to the frame.
DIY versus a professional finish
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.