Surrey · England
Sand mastic for sash & case windows in Sheerwater, Surrey
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in Sheerwater, with a one-year guarantee on every job. Ask us for a quote.
- Crumbling sand mastic round a window
- Patchy fillers round a sash window
- Draughts and rain around sash boxes
The process
We bring everything the job needs with us, so you don’t need to buy or prepare anything. After a quick look at the joints together, we protect the area and start. Most jobs take a few hours per window, depending on the condition of the joints. In a small place like Sheerwater, access is generally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First we agree which joints need doing.
- Old mastic and any loose material are raked out.
- We pack any deep voids first.
- We apply the mastic by hand and shape it.
- We dress the finish so it sits neatly against the masonry.
How to prepare
- Let us know about parking restrictions
- Keep children and pets away from the work area
- Move anything stored near the joints
How to get a quote
We don’t publish a price list. Instead, we send you a clear quote for your job. To arrange one, call 0345 464 0079 or send us an email.
Advice
How we handle sand mastic in Sheerwater
Sand mastic has long been used to fill the joint between timber frames and masonry. It’s a mix of sand and a linseed-oil-based binder and built up by hand. On older homes, it suits the building far better than silicone. We work on stone surrounds, timber door frames and brick reveals, and the jobs we see most are silicone on a period window that looks wrong and old sand mastic that has cracked, crumbled or fallen out.
Around Sheerwater, many homes face open ground, so their windows and doors take the full weather. That exposure dries out and cracks the mastic around frames and sills faster.
You’re covered for a year from the day we finish. If there’s a problem with it, please call 0345 464 0079 or send us an email.
- Where
- Sheerwater (GU21)
- Region
- Surrey
- Guarantee
- One year on every job
- Quotes
- A clear price before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Keeping the joints in good condition
Looking after new joints is easy:
- Plan mastic work ahead of painting
- Go gently near the mastic when preparing windows
- Leave the new mastic unpainted
- Keep sills and gutters clear so water drains away
Do not run silicone over the new mastic. If anything cracks, get it looked at before trying a quick fix.
Gaps round a sash box let in draughts and rain. The longer it’s left, the more the joint opens.
Do you need sand mastic in Sheerwater?
Age is the main cause. Sand mastic is a maintenance item like any pointing, depending on exposure and upkeep.
Look out for these signs:
- Gaps where the frame meets the masonry
- Gaps round a timber door in stone or brick
- A silicone bead on a sash window that spoils the look
- Failed mastic on an exposed elevation
If you live in an older home near St. Michaels Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Questions to ask before you book
- How the surfaces are prepared before sealing
- Whether VAT is included
- Whether you can choose the colour
- What insurance they hold
Quotes for sand mastic in Sheerwater
We quote each job individually. This is what makes a difference:
- Whether there’s mould to deal with
- Which sealant suits the joint
- The number and length of the joints
- How many rooms, windows or areas are involved
There are no prices on our website, because each job is priced on what it involves. For a quick quote, please ring 0345 464 0079 or send us an email.
Asking for a quote
Photos by email are helpful but not essential. Please mention:
- How we’d reach the joints
- Whether it has been sealed before
- Roughly how big the job is
- Whether it’s a home or a business
We quote each job on its own. Just ring 0345 464 0079 or email us with the details.
When it is not the sealant
We will always be straight with you, so here’s what new sealant won’t do:
- Sash cords, weights and draught-proofing of the sashes
- Decisions on consent for listed homes
- Masonry that needs repairing
If you are not sure, just phone 0345 464 0079 or email us and we’ll give you a straight answer before you book.
Surfaces we seal
- Tenement windows
- Period & listed homes
- Sash and case windows
- Brick reveals
- Stone surrounds
- Timber door frames
Sand mastic in Sheerwater: local notes
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. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic. Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For landlords with property near West Byfleet station, older sash windows in a rental need their mastic kept sound to keep the weather out. For site and facilities teams at buildings such as Broadmere Primary Academy, its window and door frames need their mastic kept sound, just like a home’s.
Sheerwater is about 2 miles north-east of Woking, in Surrey. From the centre of Sheerwater to the outskirts, we cover sand mastic for every kind of property, from flats and houses to offices and hotels. We cover 395 towns and villages across Surrey, large and small. Our Crawley page covers work nearby, about 21 miles away.
Here we cover the GU21 postcode area for sand mastic. Local streets include Dartmouth Avenue, Dartmouth Green and Pine Grove, and we cover them all. Nearby, we also carry out sand mastic in 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). We also work in nearby towns such as 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).
Near you in Sheerwater
In Sheerwater, that means homes and buildings near The Bishop David Brown School, White Rose Lane and The Bishop David Brown School, among other places. Sheerwater’s nearest station is West Byfleet station, roughly 1.1 miles north-east of the centre. Nearby you’ll also find 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.
Common questions in Sheerwater
Is Sheerwater within the area you cover?
Yes. Sheerwater is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Do you cover Sheerwater for sand mastic?
Yes. Our work covers 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, and we will give you a clear price.
How long does sand mastic take to go off?
It skins over fairly quickly but takes longer to harden fully. We will explain what to expect before we leave.
Should I try DIY first?
Sometimes. Preparation is everything: all the old sealant out, and a clean, dry joint. If it does not work out, we can redo it.
Which is right for my windows, sand mastic or modern sealant?
We will help you decide. Sand mastic suits many period homes, and modern sealants suit newer frames.
Will you leave a mess?
Not at all. We work neatly, protect the area around the joints and tidy up afterwards.
Can sand mastic be painted?
Traditional guidance is not to paint over sand mastic. If you’re redecorating the window, ask us first and we’ll talk you through it.
Does someone need to be in?
We need access to the joints, so we will agree that with you when we book. Indoors, that generally means someone at home.
What happens if it’s left?
Silicone might seem the quicker option, but on period stone or brick it often looks out of place. Sand mastic is the traditional material and finishes neatly against the masonry. Around Sheerwater, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
Combining jobs into one visit normally makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. You will get one clear quote for the whole job.
What you get with us
- Quality sealants from Arbo and Everbuild
- More than 20 years in sealant work
- We leave the area clean and tidy
- Approved under the ARBOMaster scheme
Take a look at what affects the cost and customer reviews.
DIY versus a professional finish
A DIY attempt does not rule out a professional job. We cut it out and start again, so just mention it when you contact us.
If you are set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it doesn’t work out, we can still put it right.