Surrey · England
Sand mastic for sash & case windows in Westborough, Surrey
We cover Westborough for traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old sealant removed completely, joints prepared properly.
- Mastic dropping out of the joint
- A silicone bead on a sash window that spoils the look
- Cement or filler used on old window joints that has cracked
How we handle sand mastic in Westborough
On many period windows, sand mastic looks right and suits the building. Newer frames normally get a flexible sealant instead, and we will talk through which suits your home. Typical jobs include cracked mastic round a front door frame and silicone on a period window that looks wrong, on period & listed homes, sash and case windows and stone surrounds.
Around Westborough, conservatories, garden rooms and patio doors are often part of the house. Those joints need the same attention as the main windows.
We stand behind the work with a 12-month guarantee.
- Where
- Westborough (GU2, GU1, GU3)
- Wider area
- Surrey
- Guarantee
- A year, on every job
- Quote
- A clear price before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Keeping the joints in good condition
After the cure time, these simple habits help:
- Avoid patching sand mastic with silicone
- Ask us before painting near the mastic
- Look over the window mastic once a year
- Get any rot dealt with first
Keep gutters and sills clear so water runs away from the surround. Water sitting against the mastic shortens its life.
Once mastic starts to crumble, rain gets in. It can soak into the frame and the surrounding masonry, so renewing it early is worth it.
Why it’s worth doing now in Westborough
Silicone might seem the quicker option, but it can look wrong on a period surround. Sand mastic is the traditional material and finishes neatly against the masonry. In an older home around Westborough, damp from a failed joint can get into timber and plaster, which is far harder to put right than the sealant itself.
There are no prices on our website, because the cost depends so much on the job itself. For a quick quote, please phone 0345 464 0079 or drop us an email and we’ll talk you through it.
Why book with us
- Quality sealants from Arbo and Everbuild
- A 12-month guarantee on all work
- We leave the area clean and tidy
- Anti-fungal silicone where joints get wet
Take a look at our cost guide or our reviews.
Do you need sand mastic in Westborough?
Sand mastic slowly weathers. It dries out, cracks and loses its grip on the stone or timber.
Most people get in touch after spotting one of these:
- Wind and rain getting in round a sash window
- Gaps between timber frames and stone or brick
- Old sand mastic that has cracked, crumbled or fallen out
- Tired mastic found when preparing windows for paint
Schools such as St Joseph's Catholic Primary School are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages.
Before you book anyone
- Who does the work, and how experienced they are
- How hidden problems are handled
- How long the guarantee is
- Whether all the old sealant comes out first
How it works
On the day, there’s very little for you to do. Show us the job and we will take it from there. The work itself takes a few hours per window, depending on the condition of the joints. Parking around Westborough is normally 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.
- Deep gaps are packed so the mastic sits at the right depth.
- The sand mastic is mixed and pressed into the joint by hand.
- We dress the finish so it sits neatly against the masonry.
How to prepare
- Mention any sign-in or site rules at work premises
- Try not to wet indoor joints just before the visit
- Clear the area around the work
Ask for a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we will explain how we’d tackle it. Whenever you are ready, ring 0345 464 0079 or drop us an email.
Related advice
How we quote for sand mastic
Call for a quick quote. The main things that affect it are:
- How many rooms, windows or areas are involved
- The type of sealant required
- Whether there’s mould to deal with
- The number and length of the joints
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.
What we need to know
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- What’s wrong with the joints now
- The address or postcode of the job
- Any access issues, like height or stairs
- Roughly how big the job is
For a quote, call 0345 464 0079 or email us and tell us where the job is and what the problem looks like. You’ll have a clear quote before we start.
What we cannot put right
In fairness, there are a few things sealant will not fix:
- Timber that has rotted
- Sash cords, weights and draught-proofing of the sashes
- Masonry that needs repairing
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we’ll tell you honestly.
Surfaces we seal
- Sash and case windows
- Period & listed homes
- Timber door frames
- Tenement windows
- Stone surrounds
- Brick reveals
What sand mastic looks like in Westborough
The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. With historic houses such as Guildford Castle (about 1.4 miles south-east) nearby, there’s older building stock in the area around Westborough as well as newer homes. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic.
In the older streets around St Francis Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. Rented homes near Guildford station change hands often, and cracked sand mastic around sash windows lets in the draughts tenants complain about.
Westborough is about 1 mile west of Guildford, in Surrey. Across the GU2 area, our applicators can take on sand mastic. Our area takes in 395 places across Surrey, large and small. There’s also a page for Crawley, about 20 miles away.
Our applicators cover all of the GU2, GU1 and GU3 postcode area for sand mastic. That includes homes and businesses on Cabell Road, Clover Road and Weston Road. You will find Westborough on the A323, which makes it straightforward to reach. Close by, we work in Stoughton (1 mile north), Bellfields (1 mile north-east), Guildford (1 mile east), Abbotswood (2 miles east) and Jacobs Well (2 miles north-east). Further out, we also cover Woking (5 miles north), Camberley (8 miles north-west), Farnham (9 miles west), Egham (13 miles north), Walton-on-Thames (13 miles north-east) and Dorking (12 miles east).
Around Westborough
We work in homes and buildings around Kings College Guildford, Broadstreet and Hare and Hounds pub, among other places. For rail, the closest station is Guildford station, roughly 1 mile south-east of the centre. Well-known places in the area include Royal Surrey County Hospital (0.6 miles south-west) and Guildford Cathedral Treasury (0.5 miles south-east). Not far away are Littlefield Common and Pewley Hill.
Also near Westborough
Also in Westborough
Different surfaces, different methods
Sash and case windows
Most of our sand mastic work is on sash windows. We renew the mastic round each box.
Tenement and terrace windows
Rows of sash windows on tenements and terraces often need renewing together. We can do one window or several.
Questions from Westborough
Will you come out to Westborough?
Yes, Westborough is covered. Our work covers London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Can you do sand mastic in Westborough?
Yes. Our work covers London and the South East, and Westborough is part of that. Just phone 0345 464 0079 or drop us an email with a few details of the job.
How do I get a quote for sand mastic in Westborough?
We do not publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. You will get a clear quote before any work starts.
Can landlords and businesses book you?
Yes. Domestic, commercial and hotel work are all part of what we do.
Should I use sand mastic or silicone?
For period timber windows in stone or brick, sand mastic is often the better fit. On modern frames, we’d normally use a flexible sealant, and we’ll explain why.
Will it make a mess?
Tidy work is part of the job. Nearby surfaces are protected.
Can you work on commercial sites?
Yes, regularly. We can plan bigger jobs in stages.
Is it possible to paint over sand mastic?
The usual advice is to leave sand mastic unpainted. Ask us before you decorate around it and we’ll talk you through it.