Slough · England
Window & door mastic in Poyle, Slough
Window mastic in Poyle from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Gaps left after new windows were fitted
- White mastic on grey or black frames
- Draughty joints inside around the window
Window mastic for homes and businesses in Poyle
A window frame and the wall around it expand and shrink at different rates. Plastic and aluminium frames move with the temperature, while masonry stays fairly still. That is why the joint needs a flexible, low-modulus sealant rather than something rigid. We work on patio & French doors, window sills and aluminium frames, and people most often call us about draughts coming in around windows and doors and cracked sealant at the sill ends.
Outdoor sealant needs dry, clean surfaces, so work on frames around Poyle is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
We guarantee the work for a year. If something isn’t right with it in that time, tell us and we will put it right.
- Location
- Poyle (SL3)
- Region
- Slough
- Guarantee
- One year on every job
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
What happens on the day
Once we’re on site, we check the joints match what you told us. If anything is different, we explain it before carrying on. Most jobs then take a few hours for a handful of frames, longer for a whole house. Somewhere like Poyle needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- First, we go round the frames with you and agree the list.
- The old mastic is cut out and scraped back to clean surfaces.
- Deep gaps get closed-cell backing rod to set the depth.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- Every joint is tooled smooth and checked before we leave.
Getting ready for the visit
- On commercial sites, let us know about site rules
- Clear items away from the joints we’re working on
- Tell us about access, such as stairs, a lift or high-level joints
Getting a quote
If you’re in Poyle and need window mastic, ring 0345 464 0079 or drop us an email. Tell us what the problem is and where, and you will get a clear quote before work begins.
Related advice
Questions from Poyle
Is Poyle in your area for window mastic?
Yes. We work across London and the South East, and Poyle is part of that. Just call 0345 464 0079 or send us an email with a few details of the job.
Will you come out to Poyle?
Yes, Poyle 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 guarantee window mastic?
Yes, for 12 months. Keeping drainage clear and checking the joints yearly helps them last.
How many windows can you do in a day?
It depends on access, the old mastic and the size of the frames. We’ll tell you how long your job needs when we quote.
Are you ARBOMaster approved?
Yes. We’re an ARBOMaster approved applicator.
I’m a tenant. Can you help?
We’re happy to deal with the tenant, landlord or agent. Get your landlord’s agreement first.
Can you do upstairs windows?
Yes, in most cases. Access is planned before work begins, so mention the height and anything in the way.
Where are you based?
We are a Crawley-based firm. Our area covers South East England, London and Scotland.
Should I try it myself first?
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
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.
Towns and villages near Poyle
What else we do in Poyle
What affects the cost of window mastic
Your quote is based on your job. We look at:
- Any mould that needs treating
- Whether old sealant or filler has to be cut out
- The amount of work
- When we can work, for business premises
We don’t show prices on the website, because each job is priced on what it involves. Call for a quick quote.
What to tell us for a quote
Photos by email are helpful but not essential. Please mention:
- Pictures of the joints, sent by email
- Where the property is
- Any previous sealing or DIY work
- The problem you’ve noticed
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and add photos by email if you can.
How the job changes by surface
Composite doors
An exposed front door gets wind-driven rain, and the top and bottom corners tend to fail first. We pay most attention there.
Patio & French doors
Patio and French doors have the longest joints on most houses. The threshold and the bottom corners take the most water, so we pay close attention there.
What happens if it’s left?
Working on frames from a ladder with a sealant gun isn’t easy, especially on upper floors. A professional job is cut out properly, backed where needed and finished neatly, in a sealant suited to the wall. Older cottages and farmhouses around Poyle can have timber 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 tell us about everything that needs sealing. You will get one clear quote for the whole job.
Why Poyle clients choose us
- We leave the area clean and tidy
- Anti-fungal sanitary silicone in wet areas
- White, clear, grey or another colour, product permitting
- Any old sealant cut out fully, not covered over
Take a look at what affects the cost or what customers say.
Landlord and commercial work in Poyle
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. We can quote for more than one property at once.
What we are called out for in Poyle
A lot of older mastic was never designed to stay flexible. Once it has hardened, the frame’s movement tears it from the wall, and a gap opens along one edge.
The most common problems we see are:
- Old mastic that has gone black or come away
- Cracked sealant at the sill ends
- A bead that doesn’t match the frame
- Gaps between the frame and the inside reveal
For site and facilities teams at buildings such as Pippins School, larger buildings have plenty of frames, and the mastic around each one ages.
What your quote should include
- Are they insured?
- How long to leave it before use
- How hidden problems are handled
- Whether all the old sealant comes out first
Poyle homes and the weather
London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. 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.
Rented homes near Heathrow Terminal 5 Rail station change hands often, and sound mastic around windows and doors keeps out the draughts and damp that tenants notice first. In the older streets around Church of St Thomas, the joint between an old wall and a newer frame is generally the first place rain gets in.
Poyle is about 3 miles north of Staines-upon-Thames, in Slough. Homes, rented property, offices and hotels in Poyle is covered for window mastic. Every job comes with our 12-month guarantee. Across Slough, we cover 31 places, Poyle among them. We also work in London, around 18 miles away.
Postcode districts we cover here for window mastic: SL3. If you need window mastic at a property on Poplar Close, Sherborne Close and Bath Road or anywhere close by, our applicators can take on the job. We also cover the places around Poyle: 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). Further out, we also cover 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).
What’s near Poyle
Locally, jobs take us to homes and businesses close to Langley Grammar School, Arthur Jacob Nature Reserve and The Punch Bowl pub. Poyle’s nearest station is Heathrow Terminal 5 Rail station, roughly 1.2 miles south-east of the centre. Other landmarks nearby include Spelthorne Museum (3.2 miles south) and Windsor Castle (3.9 miles west). For a walk, there’s Crane Meadows and Staines Reservoirs.