Slough · England
Window & door mastic in Langley, Slough
Window mastic in Langley from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Hard, cracked sealant around windows
- Rain getting in at the frame or under the sill
- Mastic that’s falling out in pieces
What window mastic looks like in Langley
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. With historic houses such as Windsor Castle (about 2.7 miles south-west) nearby, there’s older building stock in the area around Langley 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.
Homes close to St Mary the Virgin Church include some older properties, and the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. Rented homes near Langley station change hands often, and cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Langley is about 2 miles east of Slough, in Slough. If you need window mastic in Langley, it’s easy to get a quote: please phone 0345 464 0079 or send us an email. We cover Slough from our Crawley base. Langley is one of 31 places in Slough we cover for window mastic. We also work in Reading, around 19 miles away.
Work in SL3 works the same way as everywhere else we cover. Streets in the area include Fox Road, New Road and Ives Road, and we cover them all. Nearby, we also carry out window mastic in Middlegreen (1 mile north-west), George Green (1 mile north), Shreding Green (1 mile north-east), Upton (2 miles west) and Richings Park (2 miles east). Larger places within reach include Cippenham (4 miles west), Britwell (4 miles north-west), Burnham (5 miles west), Stoke Poges (3 miles north-west), Huntercombe (5 miles west) and Farnham Common (4 miles north-west). Langley is one of the larger places we cover in Slough.
Around Langley
We work in homes and buildings around Upton Court Grammar School, The Red Lion Public House and Langley Academy, among other places. Langley’s nearest station is Langley station, about 0.5 miles east. Nearby you will also find Windsor Castle (2.7 miles south-west) and Upton Hospital (1.7 miles west). For a walk, there’s Staines Reservoirs and Uxbridge Moor.
Window mastic in Langley, done properly
Homes in Langley have every kind of window: uPVC, aluminium, timber and composite, along with patio doors, French doors and sills. Each gets a sealant chosen for the frame and the wall it meets. We work on patio & French doors, timber windows & doors and composite doors, and people most often call us about gaps between the frame and the inside reveal and water coming in at the bottom corners of a door.
Homes around Langley range from older properties to newer houses, and their windows range just as widely. Each frame material needs the right sealant against the right wall.
We stand behind the work with a 12-month guarantee.
- Location
- Langley (SL3)
- Region
- Slough
- Guarantee
- One year on every job
- Price
- A clear price before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Signs you need window mastic in Langley
A lot of older mastic was never designed to stay flexible. Once it’s rigid, every bit of frame movement pulls at it, and a gap opens along one edge.
Signs it’s time to call us include:
- Cracked or shrunken mastic around the frame
- Untidy mastic left by window fitters
- Cracked internal joints between frame and plaster
- Whistling draughts around closed windows
If you look after a building such as The Langley Academy Primary, larger buildings have plenty of frames, and the mastic around each one ages.
Before you book anyone
- Which sealant they’ll use, and why
- When the joint can take water or movement
- What happens if the job turns out different
- What the quote includes, VAT included or not
What else we do in Langley
Landlords, agents and businesses in Langley
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance that we can handle for you.
For anyone letting property in or around Langley, jobs at different addresses can be quoted together. Send us the addresses and the work at each.
Langley: your questions answered
Can you do window mastic in Langley?
Yes. Our work covers London and the South East, and Langley is part of that. Just call 0345 464 0079 or drop us an email with a few details of the job.
Do you cover smaller places like Langley?
Yes, smaller places are covered as well as towns. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Do you work for letting agents?
Yes. As well as householders, we work for landlords, agents, businesses and hotels.
What should I tell you?
The location, the problem and the rough size of the job. If you can, email a few pictures.
Where are you based?
Mr Mastic is based in Crawley. We cover Langley and the rest of Slough.
Do you guarantee window mastic?
Yes. Every job comes with our one-year guarantee, and we’re ARBOMaster approved applicators.
When is the sealant fully cured?
Most sealants are touch-dry well before they’re fully cured. We’ll give you the cure time for the product we used before we leave.
What does window mastic cost?
There’s no set price, as it depends on the job: how much there is, what’s there now, how we reach it and what it needs. We agree the price before any work begins.
How it works
There’s no need to move everything out, just the space around the work. Everything nearby is protected, and the work takes a few hours for a few frames, or a day or more for a whole house for a typical job. For a job in Langley, we agree the time, the access and parking before the day. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- Each frame is looked over and we agree which ones need resealing.
- The old mastic is cut out and scraped back to clean surfaces.
- Where the gap is deep, backing rod goes in first.
- A flexible exterior sealant is applied in a colour to suit the frame.
- Every joint is tooled smooth and checked before we leave.
How to prepare
- Let us know about earlier repairs to the joints
- Try not to wet indoor joints just before the visit
- Mention any parking rules near the property
Getting a quote
Asking for a quote is easy: let us know the job and the location. A few pictures by email make the job easier to understand, and we’ll take it from there.
Read more
Looking after it afterwards
A little care helps the new joints last. We recommend:
- Keep paint and stain on wooden frames in good order
- Avoid blasting the frames with a pressure washer
- Keep drainage slots and sill grooves clear
- Keep solvents and bleach off the sealant
Silicone can’t generally be painted, so mention any painting plans before we start. There are paintable sealants for joints that need it.
A small gap around a frame only grows. As the old mastic shrinks further, more air gets through, and a cold room gets colder. Resealing closes it.
Quotes for window mastic in Langley
There’s no set price list, because no two jobs are the same. The quote depends on:
- Whether there’s mould to deal with
- Any working-time requirements on site
- How much old sealant there is and how hard it is to remove
- The size of the job
Homes and businesses are quoted the same way: the amount of work, the access and the products needed. Call for a quick quote and we will explain what it covers.
What to tell us for a quote
You don’t need to know the technical terms. Just tell us:
- Where the property is
- Any access issues, like height or stairs
- The rough size of the job
- Photos by email, if that’s easy
For a quote, call 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. We’ll send you a clear quote before any work starts.
When something else is needed
Some problems need a builder, plumber or other trade rather than us:
- A failed sealed unit that has misted up
- Damp problems in the wall away from the window
- A sash or casement that won’t close properly
If in doubt, phone 0345 464 0079 or send us an email and we will say what we think.
What we seal
- Patio & French doors
- Composite doors
- Window sills
- Timber windows & doors
- uPVC windows
- Aluminium frames
DIY versus a professional finish
A DIY attempt doesn’t rule out a professional job. We cut it out and start again, so just mention it when you contact us.
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.