Kent · England
Window & door mastic in Biddenden, Kent
Mastic around window and door frames, sills and patio doors for householders, landlords and businesses in Biddenden. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Rushed sealant from a window installation
- Whistling draughts around closed windows
- Gaps where the sill meets the wall
Why deal with it now?
Failed mastic is not a reason to replace sound windows. Where the frames are sound, new mastic generally deals with draughts and leaks at the edges. If we find failed glass units or worn seals, we’ll tell you. Older cottages and farmhouses around Biddenden can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Rather than a set price list, we price the job in front of us: how many joints, what’s in them now and how we reach them. You will know the price before we begin.
Why choose Mr Mastic in Biddenden
- Rated 4.9 stars on Google
- Domestic, commercial and hotel work
- Trusted Arbo and Everbuild sealants
- We leave the area clean and tidy
Read what affects the cost and our reviews.
About our window mastic in Biddenden
Around Biddenden we seal all kinds of frames: from uPVC casements to timber and aluminium, along with patio doors, French doors and sills. The sealant is chosen to suit the frame material and the wall. We work on patio & French doors, uPVC windows and aluminium frames, and people most often call us about old mastic that has gone black or come away and rushed sealant from a window installation.
Somewhere as small as Biddenden, older homes often have timber frames set in stone or brickwork. Older buildings like these don’t always suit modern silicone, and sometimes a traditional sand mastic is the better choice.
We stand behind the work with a 12-month guarantee.
- Where
- Biddenden (TN27)
- Wider area
- Kent
- Cover
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
What else we do in Biddenden
Different surfaces, different methods
Composite doors
If the door itself is draughty, the issue may be the door seals or hinges rather than the frame mastic. We’ll tell you if that is what we find.
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.
How the visit works
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. For most jobs that takes a morning for a couple of windows and a door. Somewhere as small as Biddenden, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We check each frame and agree which ones need doing.
- Next the failed sealant is cut away and the joint cleaned.
- Where gaps are deep, backing rod goes in first.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- We clear up and check every joint is fully closed.
How to prepare
- Let us know if you’ve seen damp or leaks
- Tell us about any previous sealing or DIY attempts
- On commercial sites, let us know about site rules
Ask for 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.
Related advice
Questions from Biddenden
Will you come out to Biddenden?
Yes, Biddenden is covered. We work across London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Do you cover Biddenden for window mastic?
Yes, Biddenden is within the area we cover. We work across London and the South East. You can phone 0345 464 0079 or drop us an email and tell us what needs doing.
Is it messy?
Not at all. The area is protected while we work and cleaned up afterwards.
Can you match the sealant to my frames?
Yes. White, brown, anthracite grey, black and clear sealants are all available.
Can landlords and businesses book you?
Yes, often. Several properties can be quoted together.
Do you guarantee window mastic?
Yes. Each job is covered for 12 months, inside or out.
Will the old sealant be removed?
Yes, every time. New sealant will not bond properly to old, so any old material comes out before anything new goes in.
When is the sealant fully cured?
Many sealants skin over quickly but take longer to cure fully. We will tell you how long to leave the joint.
When to call us in Biddenden
Mastic ages in the weather. Sunlight dries the surface out, and over the years it loses its give, cracks and comes away.
Look out for any of the following:
- A bead that doesn’t match the frame
- Draughts coming in around windows and doors
- Rain getting in at the frame or under the sill
- Rushed sealant from a window installation
Rented homes near Headcorn 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.
What your quote should include
- Which sealant they’ll use, and why
- Whether they’re fully insured
- When the joint can take water or movement
- Whether they seal over old material or remove it
Work for landlords, hotels and businesses
We work for letting agents and landlords as well as homeowners. Sealant work between tenants is a simple way to keep a property in good order.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance.
Windows and doors in Biddenden
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.
If you live in an older home near Parish Church of All Saints, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. For site and facilities teams at buildings such as John Mayne Church of England Primary School, larger buildings have plenty of frames, and the mastic around each one ages.
Biddenden is about 10 miles west of Ashford, in Kent. Biddenden gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Across Kent, we cover 922 places, Biddenden among them. For nearby work, see our Crawley page, about 36 miles away.
All of TN27 is within our area for window mastic. If you need window mastic at a property on High Street, The Meadows and Cloth Hall Gardens or anywhere close by, our applicators can take on the job. Close by, we work in Curteis' Corner (1 mile north-east), Woolpack Corner (1 mile south-east), Standen (1 mile north-east), Hareplain (1 mile north-west) and Stede Quarter (1 mile east). Larger places within reach include Maidstone (11 miles north-west), Ashford (10 miles east), Kings Hill (15 miles north-west), Foley Park (12 miles north-west), Paddock Wood (12 miles west) and Tenterden (4 miles south-east).
Around Biddenden
We work in homes and buildings around The Red Lion Inn. For rail, the closest station is Headcorn station, about 3.5 miles north. Other landmarks nearby include Benenden Hospital (2.3 miles south-west) and Sissinghurst Castle (2.6 miles west).
Honest limits
Honest advice matters more to us than a booking, so here’s what new sealant won’t do:
- Soft or decayed wood in the frame
- Condensation trapped between the panes
- Damp problems in the wall away from the window
Not sure which it is? You can call 0345 464 0079 or email us and we’ll tell you honestly.
Surfaces we seal
- Patio & French doors
- Aluminium frames
- Timber windows & doors
- uPVC windows
- Window sills
- Composite doors
How to look after the new joints
No joint lasts for ever, but care makes a real difference. Our tips:
- Ventilate rooms so frames don’t stay wet inside
- Wash the frames with mild soapy water
- Avoid harsh chemicals near the mastic
- Walk round the house once a year and look at the joints
On timber frames, keep the paintwork in good order, since wood that gets wet swells and shrinks more. Keep paint off the silicone itself.
Look out for the warning signs: cracks in the mastic, gaps you can see light through, damp on the reveal or mould around the inside of the frame. Any of these is worth a call.