Slough · England
Sand mastic for sash & case windows in Poyle, Slough
Sand mastic across Poyle and nearby, with every bit of old sealant taken out first and a 12-month guarantee.
- Failed mastic on an exposed elevation
- Draughts and rain around sash boxes
- Gaps where the frame meets the masonry
Why deal with it now?
If you are redecorating, renew the mastic first. Painting over failed mastic does not seal it, and the new mastic is traditionally left unpainted. Where a wall is exposed, as many are in small places like Poyle, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
What it costs depends on the size of the job, how much old material has to come out and access to the work. We give a clear quote before any work starts, so you know where you stand.
What you get with us
- We leave the area clean and tidy
- Old sealant always removed completely
- Anti-fungal silicone where joints get wet
- We’re fully insured
Sand mastic in Poyle
We work across Poyle renewing sand mastic on sash windows and doors. Every joint is cleaned out and filled by hand for a neat, traditional finish. We work on sash and case windows, period & listed homes and timber door frames, and people most often call us about old cement repairs round a window that have failed and gaps where the frame meets the masonry.
Around Poyle, many homes face open ground, so their windows and doors take the full weather. Exposed frames and sills lose their mastic sooner than sheltered ones.
We guarantee the work for a year. If something isn’t right with it in that time, tell us and we’ll put it right.
- Where
- Poyle (SL3)
- Region
- Slough
- Cover
- A year, on every job
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Sand mastic in Poyle: local notes
London and the South East are among 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 Frogmore House (about 3.5 miles west) nearby, there’s older building stock in the area around Poyle as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
Letting a property close to Heathrow Terminal 5 Rail station? Then any sash windows need sound mastic to keep draughts and rain out. Homes close to Church of St Thomas include some older properties, and the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. If you look after a building such as Pippins School, the mastic around its windows and doors needs looking after like any other building’s.
Poyle is about 3 miles north of Staines-upon-Thames, in Slough. If you need sand mastic in Poyle, it’s easy to get a quote: please call 0345 464 0079 or email us. We’re based in Crawley and cover Slough. Poyle is one of 31 places in Slough we cover. London is on our list too, around 18 miles away.
Postcode districts we cover here for sand mastic: SL3. Streets in the area include Poplar Close, Sherborne Close and Bath Road. If you’re just outside Poyle, we cover Colnbrook (1 mile north-west), Horton (1 mile south-west), Brands Hill (1 mile west), Stanwell Moor (1 mile south-east) and Sunnymeads (2 miles west). We also work in nearby towns such as Slough (5 miles north-west), Cippenham (6 miles north-west), Chalvey (5 miles north-west), Britwell (6 miles north-west), Langley (3 miles north-west) and Upton (4 miles north-west).
Around Poyle
We work in homes and buildings around Langley Grammar School, Arthur Jacob Nature Reserve and The Punch Bowl pub, among other places. The nearest railway station is Heathrow Terminal 5 Rail station, roughly 1.2 miles south-east. A little further out are Spelthorne Museum (3.2 miles south) and Windsor Castle (3.9 miles west). The countryside around Poyle includes Crane Meadows and Staines Reservoirs.
What affects the cost of sand mastic
You’ll get a clear quote before we start. It takes into account:
- How much old sealant there is and how hard it is to remove
- How many rooms, windows or areas are involved
- The type of sealant required
- Working hours on commercial sites
Combining jobs into one visit is generally more efficient than separate visits. We’ll send you a clear quote for the lot.
What to tell us for a quote
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- Roughly how big the job is
- Photos by email, if that is easy
- Any previous sealing or DIY work
- The address or postcode of the job
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 add pictures by email if you can.
How the visit works
On the day, there’s very little for you to do. Point us to the joints and we will get on with it. The work itself takes a few hours for a single window, longer for several from start to finish. For a village or hamlet like Poyle, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- We check each window surround and the condition of the joint.
- The joint is raked out and cleaned.
- Large voids are packed out.
- New sand mastic is applied and shaped by hand.
- The finish is dressed neatly.
Preparing for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Plan for the work area to be out of bounds to pets and children
- Clear the area around the work
How to get a quote
Every job is quoted individually. Just ring 0345 464 0079 or email us with the details.
Advice
Surface by surface
Period and listed homes
Materials matter on listed and conservation-area homes. Like-for-like sand mastic is usually favoured.
Tenement and terrace windows
Where a building is shared, window work may involve neighbours so it’s worth checking responsibilities.
Your questions about sand mastic in Poyle
Do you work for landlords with property near Heathrow Terminal 5 Rail station?
Yes. We work for landlords and letting agents as well as householders, and several properties can go on one quote. You can ring 0345 464 0079 or email us with the details for a clear quote.
Will you come out to Poyle?
Yes, Poyle is covered. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
What’s sand mastic made of?
It’s sand mixed with a linseed-oil-based binder, used between timber frames and stone or brick.
Can I do it myself?
Sometimes. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
Do the sealants smell?
Sometimes, a little. It fades as the sealant cures.
Should I use sand mastic or silicone?
Sand mastic usually suits period timber windows best. Modern frames normally suit a flexible sealant.
Do you guarantee sand mastic work?
Our 12-month guarantee applies to all our work.
How long does sand mastic take to go off?
The surface skins quite quickly, then hardens over a longer period. The weather and joint depth both affect it.
Landlords, agents and businesses in Poyle
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.
We also work for property managers and facilities teams in Poyle and across Slough. We can quote a run of properties together, and we are fully insured.
What sealant work can’t fix
Before you book, it’s worth knowing the limits too:
- Putty and glazing repairs
- Sash cords, weights and draught-proofing of the sashes
- Damaged stone surrounds
If in doubt, ring 0345 464 0079 or send us an email and we will say what we think.
What we seal
- Sash and case windows
- Period & listed homes
- Tenement windows
- Brick reveals
- Timber door frames
- Stone surrounds
Nearby places to Poyle
What else we do in Poyle
Should I try it myself first?
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.