Kent · England
Clap Hill Window Mastic
Window mastic in Clap Hill from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- A bead that does not match the frame
- Untidy mastic left by window fitters
- Rain getting in at the frame or under the sill
Can I do it myself?
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
If you’ve already had a go yourself, that is fine. We cut it out and start again, so tell us about it when you ask for a quote.
Window mastic for homes and businesses in Clap Hill
The mastic around a window or door seals the gap between the frame and the wall. When it cracks, hardens or pulls away, draughts and rain get in. Our applicators cut it out and replace it with a flexible, weatherproof sealant. If you have cracked or shrunken mastic around the frame and whistling draughts around closed windows, we can put it right, whatever the surface.
Mastic can only go onto a dry, clean joint, so window work in Clap Hill is booked around the forecast. Tell us about access to every side of the house, including upper-floor windows.
All of our work is guaranteed for twelve months, in Clap Hill and everywhere else we cover.
- Place
- Clap Hill (TN25)
- Wider area
- Kent
- Guarantee
- One year on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Nearby places to Clap Hill
More services for Clap Hill
Landlord and commercial work in Clap Hill
Hotels need rooms back in use, so we plan the work room by room. We have worked in hotels as well as homes and businesses.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
How it works
There isn’t much for you to do on the day. Point us to the joints and we’ll get on with it. The job generally takes a morning for a couple of windows and a door. In a small place like Clap Hill, access is generally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- Each frame is looked over and we agree which ones need resealing.
- We remove the old mastic and clean the frame edge and wall.
- 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.
Preparing for the visit
- Tell us if parking is tricky
- Mention if the joints have been sealed before
- Mention any tricky access
How to get a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is.
Advice
Why deal with it now?
Draughts and leaks do not always mean new windows. Where the frames are sound, new mastic usually deals with draughts and leaks at the edges. Problems with the glass or gaskets are for a window company, and we’ll say so. Where a wall is exposed, as many are in small places like Clap Hill, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Instead of a standard rate, we look at what your job involves: the amount of work, the old material and the access. You’ll know the price before we begin.
Why us?
- 180+ five-star Google reviews
- Full insurance on every job
- Anti-fungal silicone where joints get wet
- Tidy, careful work
See our cost guide or customer reviews.
Signs you need window mastic in Clap Hill
On timber frames, paint and putty build up around the joint. Mastic painted over many times cracks with the paint, and the wood moves with damp as well as heat.
People generally contact us after spotting one of these:
- Draughts coming in around windows and doors
- Rain getting in at the frame or under the sill
- A bead that doesn’t match the frame
- Mastic that has split away from the wall
Westenhanger Castle, about 4.1 miles east, is one of the historic houses in the wider area around Clap Hill, and older homes nearby need a sealant that suits their walls.
Questions to ask before you book
- Who turns up on the day
- What the cure time is
- Which sealant they’ll use, and why
- Are they insured?
Questions from Clap Hill
Do you work for landlords with property near Ham Street station?
Yes, landlords and agents are among the people we work for. You can phone 0345 464 0079 or drop us an email with the details for a clear quote.
Will you come out to Clap Hill?
Yes, we do. 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 guarantee window mastic?
Yes, with our 12-month guarantee. A yearly look at the joints helps them last.
Are you fully insured?
Yes. Mr Mastic is fully insured, and we have been doing sealant work for more than 20 years.
Will you leave a mess?
Tidy work is part of the job. We protect what’s around the joints.
How much does window mastic cost in Clap Hill?
The cost depends on the size of the job, access and how much old sealant has to come out. Ask us for a quote and we will talk you through it.
How many windows can you do in a day?
A few frames take a few hours, while a whole house takes longer. You will get a timescale with the quote.
Can you work on commercial sites?
Yes, regularly. Larger jobs can be planned room by room or area by area.
Frames and glazing around Clap Hill
Historic houses like Westenhanger Castle (about 4.1 miles east) are a reminder that the area around Clap Hill has older buildings as well as new. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. 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.
Schools such as Aldington Primary School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s. For landlords with property near Ham Street station, renewing tired window mastic between tenants heads off draught and damp complaints.
Clap Hill is about 4 miles south-east of Ashford, in Kent. If you need window mastic in Clap Hill, please phone 0345 464 0079 or send us an email for a quick quote. We cover Kent from our Crawley base, Clap Hill included. Clap Hill is one of 922 towns and villages in Kent where we work. For nearby work, see our Chelmsford page.
Every address in TN25 is covered for window mastic, from the main roads to the quietest streets. We also cover the places around Clap Hill: Aldington (1 mile south-east), Stonestreet Green (1 mile east), Bonnington (1 mile south-west), Aldington Frith (1 mile west) and Postling Green (1 mile south-east). Larger places within reach include Ashford (4 miles north-west), Canterbury (14 miles north-east), Folkestone (10 miles east), Faversham (15 miles north), Hythe (6 miles east) and Preston (15 miles north).
Near you in Clap Hill
Around Clap Hill, our work takes us to homes and buildings near Poulton Wood and Walnut Tree Inn, among other places. The nearest railway station is Ham Street station, about 4.1 miles south-west. Nearby you will also find Lympne Castle (4.1 miles south-east) and William Harvey Hospital (3.3 miles north). For a walk, there’s Hatch Park.
How the job changes by surface
Composite doors
Draughts round the door leaf generally come from worn seals or adjustment, not the mastic. We’ll tell you if that is what we find.
Aluminium frames
Bi-fold and sliding aluminium doors have long frame joints, and the bottom joint sees the most water. Each is cleaned, backed where deep and resealed.
Keeping the joints in good condition
So the new joints stay in good condition:
- Wipe condensation off the frames
- Check the mastic once a year
- Keep paint off silicone joints
- Keep paint and stain on wooden frames in good order
Wipe the frames with soapy water when you clean the windows, and keep solvents and harsh chemicals off the joint.
Wet, windy weather is when failed mastic shows itself, but sealant goes on best when frames and walls are dry. Sorting cracked mastic early means the joint is sound before the bad weather.