Surrey · England
Sand mastic for sash & case windows in Godalming, Surrey
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homeowners, landlords and businesses in Godalming. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Old sand mastic that has cracked, crumbled or fallen out
- Open joints round the window box
- Gaps round a timber door in stone or brick
Godalming: your questions answered
Do you cover smaller places like Godalming?
Yes, Godalming is covered. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Do you work for landlords with property near Godalming station?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or send us an email with the address and a few details, and we’ll give you a fixed price before any work starts.
Are you fully insured?
Yes. We’re fully insured, with over 20 years’ experience in sealant work.
How long does sand mastic take to harden?
Not straight away. The skin forms first, and the full set comes later, and we’ll tell you what to expect.
Is sand mastic better than silicone for my windows?
We’ll talk it through with you. Sand mastic suits many period homes, and modern sealants suit newer frames.
Can I do it myself?
Sometimes. The key is preparation: remove all the old material and work on a clean, dry joint. If it doesn’t work out, we can redo it.
Do you remove the old sealant?
Yes. Sealing over old sealant is the main reason resealing fails early, so we never do it.
Can sand mastic be painted?
Traditional guidance is not to paint over sand mastic. Ask us before you decorate around it and we will advise.
Sand mastic in Godalming, done properly
Traditional burnt sand mastic that sits naturally against stone and brick. It’s a good fit for period properties, where modern sealant can look out of place. We work on tenement windows, sash and case windows and period & listed homes, and the jobs we see most are a silicone bead on a sash window that spoils the look and open joints round the window box.
In smaller places like Godalming, homes range from older cottages to newer houses, with windows to match: timber, uPVC and aluminium. Each frame material needs the right sealant against the right wall.
Our work is backed for twelve months.
- Where
- Godalming (GU7, GU8)
- Wider area
- Surrey
- Cover
- A year, on every job
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Looking after it afterwards
Once the sealant has cured, a few habits help it last:
- Don’t run silicone over sand mastic
- Keep sills and gutters clear so water drains away
- Leave the new mastic unpainted
- Sort the mastic before the decorators arrive
Look at the mastic when you look over the windows. Small cracks are easier to deal with early.
Once mastic starts to crumble, rain gets in. That water can reach the timber frame and the wall, so renewing it early is worth it.
When it isn’t the sealant
Before booking, it’s worth knowing the limits too:
- Cracked or broken glass
- Rotten sashes, sills or window boxes (a joiner’s job)
- Planning or listed building consent (your local planning authority decides)
If you are not sure, just ring 0345 464 0079 or drop us an email and we’ll give you a straight answer.
Surfaces we seal
- Brick reveals
- Stone surrounds
- Timber door frames
- Period & listed homes
- Sash and case windows
- Tenement windows
Windows and doors in Godalming
Historic houses like Loseley Park (about 2.2 miles north) are a reminder that the area around Godalming 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, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Rented homes near Godalming station change hands often, and any sash windows need sound mastic to keep draughts and rain out. Managing a site like Moss Lane School? Then larger buildings have plenty of frames, and the mastic around each one ages.
Godalming is about 5 miles south of Guildford, in Surrey. Homes, rented property, offices and hotels in Godalming can book us for sand mastic, old or new, large or small. Every job comes with our 12-month guarantee. Across Surrey, we cover 395 places, and Godalming is one of them. For nearby work, see our Crawley page.
Here we cover the GU7 and GU8 postcode area for sand mastic. Streets in the area include High Street, Station Road and Market Mews. Being close to the A3100 and B2130, Godalming is easy for our applicators to reach for sand mastic. We also cover the places around Godalming: Aaron's Hill (1 mile west), Busbridge (1 mile south-east), Farncombe (1 mile north), Tuesley (1 mile south) and Upper Eashing (1 mile west). Further out, we also cover Guildford (5 miles north), Woking (9 miles north), Camberley (11 miles north-west), Farnham (8 miles west), Dorking (13 miles east) and Frimley (10 miles north-west).
Around Godalming
Locally, jobs take us to homes and businesses close to The Richmond Arms Public House, Godalming College and St Hilary's School and the streets around them. There’s a railway station in Godalming itself: Godalming station. Nearby you will also find Guildford Castle (3.9 miles north-east) and Godalming Museum (under half a mile north). For a walk, there’s Frith Hill and Farncombe Wood.
How the visit works
At the end, we look at the finished work together and tell you how long to leave it. The visit itself generally takes anything from a few hours to a full day, depending on how many windows, depending on how much there is to do. Parking around Godalming is usually easier than in a town centre, but mention any lanes, gates or long drives. For outside work, side access and the height of the joints help us plan.
- First we agree which joints need doing.
- Old mastic and any loose material are raked out.
- We pack any deep voids first.
- The sand mastic is mixed and pressed into the joint by hand.
- We dress the finish so it sits neatly against the masonry.
Before we arrive
- Mention any sign-in or site rules at work premises
- Let us know if you’ve seen damp or leaks
- Tell us if parking is tricky
Getting a quote
To get a quote, ring 0345 464 0079 or send us an email with the location and a short description of the problem. You’ll have a clear quote before any work starts.
Related advice
How we quote for sand mastic
Some jobs are bigger than they look, and some smaller. The main factors:
- Mould in or behind the old joints
- The number of rooms or windows
- Whether the work is at height
- How much old sealant there is and how hard it is to remove
A few things move the cost up or down: how much old sealant there is and how stubborn it is, any mould to treat, and whether we need extra access for height. Your quote takes all of that into account.
What we need to know
Photos help, but a description is a good start. Please mention:
- Whether it’s a home or a business
- If someone has resealed it before
- Photos by email, if that is easy
- What the problem is, such as mould, gaps, leaks or cracking
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and email photos if that’s easy.
DIY sealant or a professional job?
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.
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
Common problems we fix in Godalming
Sand mastic slowly weathers. It dries out, cracks and loses its grip on the stone or timber.
Look out for any of the following:
- Cracked mastic round a front door frame
- Silicone on a period window that looks wrong
- Gaps between timber frames and stone or brick
- Draughts and rain around sash boxes
Homes close to St Edmund Church include some older properties, and the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
What to look for in a quote
- What product goes in the joint
- Is VAT in the price?
- Who turns up on the day
- What happens if they find a problem under the old sealant
Towns and villages near Godalming
What else we do in Godalming
Why deal with it now?
Draughts round a sash window aren’t always the sashes. Gaps between the frame and the wall can be just as bad and new mastic seals them. Homes in smaller places like Godalming can face more weather, and failed outside joints let damp into walls. Inside, a split seal lets water into floors and panels just as it would anywhere.
Instead of a standard rate, we look at what your job involves: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Why Godalming customers choose us
- Homes, businesses and hotels
- More than 20 years in sealant work
- Trusted Arbo and Everbuild sealants
- Fully insured
See what affects the cost and customer reviews.