Surrey · England
Sheerwater Window Mastic
Mastic around window and door frames, sills and patio doors in Sheerwater, with a one-year guarantee on every job. Call for a quick quote.
- Mastic that’s falling out in pieces
- Draughty joints inside around the window
- Leaking joints at the ends of sills
FAQs for Sheerwater
Can you do window mastic in Sheerwater?
Yes. We work across London and the South East, and Sheerwater is part of that. You can ring 0345 464 0079 or email us and let us know what needs doing.
I let a flat near West Byfleet station. Can you help?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. Just ring 0345 464 0079 or drop us an email with the address and what needs doing, and we’ll give you a clear price.
Can new window sealant be painted?
It depends on the sealant. Some hybrid sealants can be painted; silicone cannot. Mention any painting plans before any work starts.
Will new mastic stop draughts?
Often, yes. Air often gets in between the frame and the wall, and resealing inside and out closes it.
Do you hold any approvals?
Yes. We hold ARBOMaster approved applicator status.
Can you quote for more than one area?
Yes. Tell us about everything you’d like done.
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.
Will the old sealant be removed?
Yes, every time. New silicone does not stick to old silicone, so the joint is cleaned back first.
How we handle window mastic in Sheerwater
Some gaps around frames are far deeper than they look. Packing it solid with sealant gives a joint that can’t flex, so deep gaps get backing rod first. That way the new bead bonds to the frame and the wall only. If you have draughty joints inside around the window and rain getting in at the frame or under the sill, we can help, on composite doors, patio & French doors and timber windows & doors alike.
Outdoor sealant needs dry, clean surfaces, so work on frames around Sheerwater is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
Your job is guaranteed for a year, as with all our work.
- Where
- Sheerwater (GU21)
- Region
- Surrey
- Cover
- A year, on every job
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Should I try it myself first?
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
Landlord and commercial work in Sheerwater
For anyone letting property in or around Sheerwater, several properties can be quoted together. Just tell us the addresses and what each one needs.
Letting agents often deal with us directly. Tell us the address, the job and how access works.
Frames and glazing around Sheerwater
The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. Historic houses like Botleys Mansion (about 2.8 miles north) are a reminder that the area around Sheerwater has older buildings as well as new. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
For site and facilities teams at buildings such as Broadmere Primary Academy, the mastic around its windows and doors needs looking after like any other building’s. In the older streets around St. Michaels Church, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Sheerwater is about 2 miles north-east of Woking, in Surrey. If you need window mastic in Sheerwater, it’s easy to get a quote: please ring 0345 464 0079 or drop us an email. We are based in Crawley and cover Surrey, Sheerwater included. Sheerwater is one of 395 towns and villages in Surrey where we work for window mastic. We also work in Crawley, around 21 miles away.
Work in GU21 is quoted and booked the same way as anywhere else. If you need window mastic at a property on Dartmouth Avenue, Dartmouth Green and Pine Grove or anywhere close by, our applicators can take on the job. Other places close to Sheerwater include Pyrford (1 mile south-east), Woodham (1 mile north-east), West Byfleet (1 mile east), Horsell (1 mile west) and Pyrford Village (2 miles south-east). Within a short drive, we also cover Guildford (6 miles south), Camberley (9 miles west), Epsom (11 miles east), Farnham (14 miles south-west), Ewell (12 miles east) and Egham (7 miles north).
Around Sheerwater
Typical jobs here are in homes near The Bishop David Brown School, White Rose Lane and The Bishop David Brown School. The nearest railway station is West Byfleet station, about 1.1 miles north-east. Other landmarks nearby include Woking Community Hospital (1.7 miles south-west) and The Hockey Museum (1.6 miles south-west). Green spaces nearby include Boldermere Lake and Papercourt Marshes.
What we do, step by step
All our tools and materials come with us in the van, so there’s nothing for you to buy. Once we’ve agreed what’s being done, we protect the area and start. It normally takes a few hours for a few frames, or a day or more for a whole house. In a small place like Sheerwater, access is normally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We start by checking each window and door with you.
- We remove the old mastic and clean the frame and the wall.
- Deep gaps are filled with backing rod to set the depth.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- Every joint is checked before we leave.
Getting ready for the visit
- Mention if the joints have been sealed before
- Let us know if you’ve seen damp or leaks
- Mention any tricky access
How to get a quote
If you’re in Sheerwater and need window mastic, ring 0345 464 0079 or drop us an email. Tell us what the problem is and where, and we’ll agree the price before any work begins.
Related advice
Why act early in Sheerwater
Working on frames from a ladder with a sealant gun is not easy, 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. Older cottages and farmhouses around Sheerwater can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
Rather than a set price list, we look at what your job involves: the amount of work, the old material and the access. You will know the price before we begin.
Why Sheerwater customers choose us
- Anti-fungal silicone where joints get wet
- Domestic, commercial and hotel work
- Rated 4.9 stars on Google
- Every job guaranteed for a year
Take a look at our cost guide and our reviews.
When something else is needed
We’d rather tell you now than do work that won’t last, so these are the limits:
- Faulty window hardware
- Damp coming through the wall itself rather than the frame joint
- A door that needs adjusting, rehanging or new seals
If you’re not sure, just phone 0345 464 0079 or email us and we will give you a straight answer.
Where we work in Sheerwater
- Window sills
- Timber windows & doors
- Aluminium frames
- Composite doors
- uPVC windows
- Patio & French doors
What affects the cost of window mastic
Jobs vary more than people expect. The main factors:
- The amount of work
- Whether there’s mould to deal with
- How much old sealant there is and how hard it is to remove
- How many areas need sealing
Homes and businesses are quoted the same way: how much there is to do, how we reach it and what it needs. Ask us for a quote and we will go through it with you.
Helping us quote
To make quoting easier, let us know:
- Any previous sealing or DIY work
- Whether it’s a home or a business
- Access, such as stairs, a lift or height
- Roughly how big the job is
We quote each job on its own. Simply call 0345 464 0079 or drop us an email and describe the job, and pictures are welcome.
Towns and villages near Sheerwater
What else we do in Sheerwater
Common problems we fix in Sheerwater
Sills take more water than any other part of a window, and the ends of the sill, where it meets the wall, are where it gets in. When that sealant fails, water gets into the wall or under the frame.
People generally contact us when they notice something like this:
- Hard, cracked sealant around windows
- Cracked internal joints between frame and plaster
- Leaking joints at the ends of sills
- White mastic on grey or black frames
If you let a flat or house near West Byfleet station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
What to look for in a quote
- Are they insured?
- Whether the sealant suits the joint
- How long the guarantee is
- Who does the work, and how experienced they are