Kent · England
Window & door mastic in Langley, Kent
Window mastic across Langley and nearby, with old sealant always removed completely and a 12-month guarantee.
- Cold air getting in at the frame edge
- Old mastic that has gone black or come away
- Cracked or shrunken mastic around the frame
How we handle window mastic in Langley
Colour matters on a frame. We can seal in white, brown, anthracite grey, black or clear, so the line suits the frame instead of standing out. We work on uPVC windows, timber windows & doors and composite doors, and the jobs we see most are mastic that has split away from the wall and water coming in at the bottom corners of a door.
Somewhere as small as Langley, older homes often have timber frames set in stone or brickwork. Older buildings like these don’t always suit modern silicone, so the sealant has to be chosen to suit the building.
All of our work is guaranteed for twelve months, in Langley and everywhere else we cover.
- Where
- Langley (ME17, ME15)
- Wider area
- Kent
- Cover
- One year on every job
- Quotes
- A clear price before work begins
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Questions from Langley
Do you work for landlords with property near Bearsted station?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or email us with the address and a few details, and we will give you a fixed price before work begins.
Do you cover Langley for window mastic?
Yes. Our work covers London and the South East, and Langley is part of that. You can call 0345 464 0079 or email us and tell us what needs doing, and we’ll give you a clear price.
Will resealing my frames help with draughts?
Often, yes. The gap between frame and wall is a common source of draughts, and sealing the inside and outside joints closes that path.
Will it make a mess?
No. We protect the surfaces around the joints, and we clear up the old sealant and our materials before we leave.
How much does window mastic cost in Langley?
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. You will get a clear quote before any work starts.
Are you fully insured?
Yes. We’re fully insured.
Do you seal inside as well as outside?
Yes. Inside, the joint between frame and plaster is sealed neatly, using a paintable sealant if you want to decorate.
Where is Mr Mastic based?
We’re a Crawley-based firm, with over 20 years’ experience. Our area covers South East England, London and Scotland.
Why deal with it now?
Draughts and leaks don’t always mean new windows. Where the frames are sound, new mastic normally deals with draughts and leaks at the edges. If we find failed glass units or worn seals, we’ll tell you. Around Langley, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
Every job is a little different, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all play a part.
Why book with us
- Colour agreed with you before work begins
- 180+ five-star Google reviews
- We never seal over old sealant
- Anti-fungal sanitary silicone in wet areas
See our cost guide or our reviews.
How it works
We bring everything the job needs with us. Once we have agreed what’s being done, we protect the area and start. Most jobs take most of a day for a typical house, less for a few frames. In a small place like Langley, access is generally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- First, we confirm safe access to each frame.
- All the failed sealant is cut away, along with any loose debris.
- Frame and wall are cleaned and must be dry before sealing, and primed where the sealant calls for it.
- Backing rod fills deep voids and the sealant goes in on top.
- We tool the joint so water runs off, then clear up.
Getting ready for the visit
- Move anything stored near the joints
- Plan for the work area to be out of bounds to pets and children
- Let us know about parking restrictions
Get a quote
Want a quote for window mastic? Please call 0345 464 0079 or email us with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.
Related advice
Towns and villages near Langley
Also in Langley
For landlords and businesses
Housing providers, facilities teams and property managers book us too in Langley and across Kent. We can quote a run of properties together, and we are fully insured for the work.
From a single let to a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
What window mastic looks like in Langley
Historic houses like Stoneacre (about 1.1 miles north) are a reminder that the area around Langley has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window. 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.
Homes close to Church of St Mary 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 let a flat or house near Bearsted station, renewing tired window mastic between tenants heads off draught and damp complaints.
Langley is about 3 miles south-east of Maidstone, in Kent. For window mastic in and around Langley, it’s easy to get a quote: please phone 0345 464 0079 or email us. We are based in Crawley and cover Kent, Langley included. 922 places in Kent are on our list, large and small. London is on our list too, about 34 miles from Langley.
Our applicators cover all of the ME17 and ME15 postcode area for window mastic and the streets around it. If you need window mastic at a property on Heath Road, Green Lane and Sutton Road or a nearby road, our applicators can take on the job. Other places close to Langley include Langley Heath (1 mile east), Five Wents (1 mile south-east), Warmlake (1 mile south), Otham (1 mile north-west) and Chart Sutton (1 mile south-west). Within a short drive, we also cover Maidstone (3 miles north-west), Ashford (14 miles south-east), Sittingbourne (10 miles north-east), Royal Tunbridge Wells (15 miles south-west), Tonbridge (14 miles west) and Faversham (14 miles north-east).
Near you in Langley
Around Langley, our work takes us to homes and buildings near New Line Learning Academy, The Potting Shed pub and Senacre Technology College and the streets around them. For rail, the closest station is Bearsted station, about 2.7 miles north. A little further out are KIMS hospital (3.6 miles north) and Sutton Valence Castle (1.8 miles south). Green spaces nearby include Detling Hill.
How the job changes by surface
Aluminium frames
Coated aluminium needs a compatible sealant and we avoid acetoxy silicones, which can react with some metals. Neutral-cure sealant is the safe choice.
Window sills
The end joints of a sill tend to fail before the rest. A tight seal at each end keeps rain out of the wall.
Honest limits
Before you book, it’s worth knowing the limits:
- Worn gaskets, brush seals or a door that has dropped
- Penetrating damp from a failed cavity tray or render
- Misting between the panes of a double-glazed unit (that needs a new unit)
If in doubt, call 0345 464 0079 or email us and we’ll say what we think.
Joints and surfaces we work on
- Aluminium frames
- Timber windows & doors
- Patio & French doors
- Composite doors
- uPVC windows
- Window sills
DIY versus a professional finish
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.
What we’re called out for in Langley
Frames are never completely still. Sun on a frame makes it expand, and it contracts again overnight, while the brick or render around it hardly moves. If the sealant cannot stretch, it splits.
These are the problems we are asked about most:
- Whistling draughts around closed windows
- Sealant in the wrong colour for the frame
- Rain getting in at the frame or under the sill
- Gaps between the frame and the inside reveal
Managing a site like Langley Park Primary Academy? Then larger buildings have plenty of frames, and the mastic around each one ages.
Comparing quotes
- Whether all the old sealant comes out first
- Is VAT in the price?
- How long to leave it before use
- Which sealant they’ll use, and why