Slough · England
Sand mastic for sash & case windows in Brands Hill, Slough
Sand mastic for Brands Hill, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Gaps round a timber door in stone or brick
- Old cement repairs round a window that have failed
- Old sand mastic that has cracked, crumbled or fallen out
What sealant work cannot fix
In fairness, some problems need a different trade:
- Decayed frames that need repair
- Planning or listed building consent (your local planning authority decides)
- Damaged stone surrounds
If in doubt, phone 0345 464 0079 or send us an email and we’ll say what we think.
Where we work in Brands Hill
- Brick reveals
- Timber door frames
- Sash and case windows
- Stone surrounds
- Period & listed homes
- Tenement windows
Sand mastic for homes and businesses in Brands Hill
We renew sand mastic around sash windows and doors in stone and brick. The old mastic is raked out, the joint is prepared and new mastic is shaped by hand. If you are dealing with draughty sash windows at the surround and patchy fillers round a sash window, we can put it right.
Somewhere as small as Brands Hill, older homes often have timber frames set in stone or brickwork. Older buildings like these do not always suit modern silicone, so the sealant has to be chosen to suit the building.
There’s a 12-month guarantee on every job, large or small.
- Place
- Brands Hill (SL3)
- Wider area
- Slough
- Guarantee
- One year on every job
- Price
- A clear price before work begins
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Brands Hill: your questions answered
Will you come out to Brands Hill?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Is Brands Hill in your area for sand mastic?
Yes. We work across London and the South East, and Brands Hill is part of that. You can phone 0345 464 0079 or drop us an email and let us know what needs doing.
Are you insured?
Yes. We’re fully insured.
What should I tell you?
A short description and the location, with pictures by email if possible. If we need more, we’ll ask.
Is it messy?
No. The area is protected while we work and cleaned up afterwards.
Can you seal over the old sealant?
No, because it fails. The old sealant always comes out first.
Do you work for hotels and businesses?
Yes. Hotels, offices and other businesses use us and we’re fully insured.
How long does the job take?
Typically it takes a few hours per window, depending on the condition of the joints. Bigger jobs take longer, and we’ll say how long yours will take.
How to look after the new joints
No joint lasts for ever, but care makes a real difference. Our tips:
- Go gently near the mastic when preparing windows
- Don’t run silicone over sand mastic
- Leave the new mastic unpainted
- Ask a joiner to look at soft timber first
Do not run silicone over the new mastic. If you see a crack, ask us to take a look rather than patching it.
It’s best to renew mastic before painting the windows. Painting over failed mastic hides the problem for a while.
Landlords, agents and businesses in Brands Hill
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
Housing providers, facilities teams and property managers book us too. We can quote a run of properties together, and we’re fully insured.
Places near Brands Hill
More services for Brands Hill
Frames and glazing around Brands Hill
With historic houses such as Frogmore House (about 2.4 miles west) nearby, there’s older building stock in the area around Brands Hill 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.
Schools such as Colnbrook Church of England Primary School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s. If you live in an older home near Church of St Michael, the joint between an old wall and a newer frame is usually the first place rain gets in. If you let a flat or house near Sunnymeads station, cracked sand mastic around sash windows lets in the draughts tenants complain about.
Brands Hill is about 3 miles south-west of West Drayton, in Slough. If you need sand mastic in Brands Hill, it’s easy to get a quote: please call 0345 464 0079 or email us. We’re based in Crawley and cover Slough. Brands Hill is one of 31 places in Slough we cover. There’s also a page for London, roughly 19 miles from Brands Hill.
Our applicators cover all of SL3 for sand mastic and the streets around it. If you are just outside Brands Hill, we cover Horton (1 mile south), Colnbrook (1 mile east), Poyle (1 mile east), Sunnymeads (1 mile south-west) and Ditton (1 mile north-west). Further out, we also cover Slough (4 miles north-west), Cippenham (5 miles north-west), Chalvey (4 miles north-west), Britwell (5 miles north-west), Upton (3 miles north-west) and Burnham (6 miles north-west).
Landmarks near Brands Hill
Around Brands Hill, our work takes us to homes and buildings near Langley Grammar School, The Crown Public House And Attached Barn and Arthur Jacob Nature Reserve. For rail, the closest station is Sunnymeads station, about 1.1 miles south-west. Nearby you’ll also find Windsor Castle (2.8 miles west) and Museum of Eton Life (3.1 miles west). For a walk, there’s Uxbridge Moor and Staines Reservoirs.
What the job involves on each surface
Timber door frames
Doors face weather and wear, so their mastic can fail sooner. We rake it out and renew it.
Sash and case windows
The box of a sash and case window sits in the stone or brick opening. Sand mastic seals the joint round it.
How it works
You don’t need to clear the whole room or building before we come, just the space around the work. We protect the rest, and the work takes a few hours for a single window, longer for several in most cases. In a small place like Brands Hill, access is normally 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.
- We remove the old, loose mastic.
- 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
- Try not to wet indoor joints just before the visit
- Mention any tricky access
- Let us know about parking restrictions
How to get a quote
Every job is quoted individually, so the first step is telling us about yours. Just ring 0345 464 0079 or send us an email with the details.
Read more
Why deal with it now?
Draughts round a sash window are not always the sashes. Open mastic joints round the box can let air in and new mastic seals them. Around Brands Hill, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
Instead of a standard rate, we price the job in front of us: the amount of work, the old material and the access. You will know the price before we begin.
Why book with us
- Every job guaranteed for a year
- Experience in homes, commercial sites and hotels
- Full insurance on every job
- An ARBOMaster approved applicator
Take a look at what affects the cost and what customers say.
How we quote for sand mastic
The quote reflects the job in front of us. We take into account:
- Access and height
- Which sealant suits the joint
- The number of rooms or windows
- Whether old sealant or filler has to be cut out
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. We take all of that into account in your quote.
What to tell us for a quote
Before you ask for a quote, have a think about:
- Access, such as stairs, a lift or height
- The type of property
- Any previous sealing or DIY work
- Roughly how big the job is
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is.