Kent · England
Heaverham Window Mastic
Mastic around window and door frames, sills and patio doors for homes and businesses in Heaverham and across Kent. Fully insured, ARBOMaster approved and guaranteed for a year.
- Gaps left after new windows were fitted
- Leaking joints at the ends of sills
- Cracked or shrunken mastic around the frame
Window mastic in Heaverham
The new joint doesn’t have to be white. White, brown, anthracite grey, black and clear sealants are all available, so the line suits the frame instead of standing out. Common call-outs are for mastic that’s falling out in pieces and draughty joints inside around the window, across window sills, timber windows & doors and patio & French doors.
Around Heaverham, many homes face open ground, so their windows and doors take the full weather. That exposure dries out and cracks the mastic around frames and sills faster.
You’re covered for a year from the day we finish. If there’s a problem with it, please call 0345 464 0079 or send us an email.
- Where
- Heaverham (TN15)
- Region
- Kent
- Guarantee
- One year on every job
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Leave it or put it right?
Choosing the product is half the job. Interior caulk and bathroom silicone are not made for exterior frame joints. A low-modulus exterior sealant keeps its stretch through hot and cold weather. In a small place like Heaverham, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
We don’t show prices on the website, because each job is priced on what it involves. For a quick quote, please phone 0345 464 0079 or send us an email.
What you get with us
- Homes, businesses and hotels
- An ARBOMaster approved applicator
- Any old sealant cut out fully, not covered over
- Sanitary silicone with an anti-fungal additive in wet areas
Take a look at our cost guide and customer reviews.
Looking after it afterwards
To keep the joints looking good and working properly:
- Make sure the drainage slots are not blocked
- Avoid harsh chemicals near the mastic
- Wash the frames with mild soapy water
- Keep paint off silicone joints
Wipe the frames with soapy water when you clean the windows, and avoid solvent cleaners on the sealant.
A failed joint lets water into the wall a little at a time. Often the first sign is a damp patch inside or flaking paint on the reveal. Catching it early keeps the fix to a reseal.
Nearby places to Heaverham
What else we do in Heaverham
What window mastic looks like in Heaverham
With historic houses such as Ightham Mote (about 3.3 miles south) nearby, there’s older building stock in the area around Heaverham as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Managing a site like Kemsing Primary School? Then its window and door frames need their mastic kept sound, just like a home’s. For an older house near a landmark such as Church of St Mary, the joint between an old wall and a newer frame is usually the first place rain gets in.
Heaverham is about 3 miles north-east of Sevenoaks, in Kent. From the centre of Heaverham to the outskirts, window mastic is available for homes and businesses alike, from flats and houses to offices and hotels. We cover 922 towns and villages across Kent, large and small. For nearby work, see our London page.
All of TN15 is within our area for window mastic. Other places close to Heaverham include Cotman's Ash (1 mile north-west), Woodlands (1 mile north), Kemsing (2 miles west), Knatts Valley (2 miles north) and Romney Street (2 miles north-west). Further out, we also cover Maidstone (12 miles east), Dartford (10 miles north), Sevenoaks (3 miles south-west), Royal Tunbridge Wells (12 miles south), Gravesend (10 miles north-east) and Tonbridge (7 miles south).
Landmarks near Heaverham
Typical jobs here are in homes near Wrotham School, The Chequers Public House and Kemsing Down and the streets around them. The closest station to Heaverham is Kemsing station, about 0.6 miles south-west. A little further out are Otford Heritage Centre (2.5 miles west) and Kemsing Castle Bank (1 mile west). Green spaces nearby include Dryhill Nature Reserve.
Common questions in Heaverham
Will you come out to Heaverham?
Yes. Heaverham is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Is Heaverham in your area for window mastic?
Yes, Heaverham is within the area we cover. We work across London and the South East. You can phone 0345 464 0079 or send us an email and tell us what needs doing.
How much does window mastic cost in Heaverham?
Every job is different, so each one gets its own quote. To get one, ring 0345 464 0079 or send us an email with a short description of the job.
Is the new sealant paintable?
That depends on the product. Silicone isn’t paintable, but some hybrid sealants are. Tell us if you’re decorating and we’ll choose accordingly.
Where do you work from?
We are based in Crawley, West Sussex, and we work across South East England, London and Scotland.
Do you have insurance?
Yes. Full insurance covers our work.
Do I have to be there?
It depends on the job. Inside work needs someone to give us access, and for outside work we will agree access with you when we book.
Is it worth trying it myself?
It depends on the job. High-level, external movement and fire-rated joints are professional jobs, while a short indoor joint may be within reach.
What sealant work cannot fix
We will always be straight with you, so here’s what sealant can’t fix:
- Soft or decayed wood in the frame
- A door that needs adjusting, rehanging or new seals
- Penetrating damp from a failed cavity tray or render
If in doubt, ring 0345 464 0079 or email us and we’ll say what we think before booking.
Surfaces we seal
- Window sills
- Patio & French doors
- Aluminium frames
- Timber windows & doors
- Composite doors
- uPVC windows
Can I do it myself?
If you are set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it doesn’t work out, we can still put it right.
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
What we do, step by step
There isn’t much for you to do on the day. Show us the job and we will take it from there. The job generally takes a morning for a couple of windows and a door, including the tidy-up. Somewhere like Heaverham 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.
- We check each frame and agree which ones need doing.
- Next the failed sealant is cut away and the joint cleaned.
- Deep gaps are filled with backing rod to set the depth.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- Every joint is checked before we leave.
Getting ready for the visit
- Let us know about parking restrictions
- For indoor joints, keep the area dry beforehand if you can
- For business premises, tell us about site rules or sign-in
Getting a quote
For a quote, call 0345 464 0079 or email us and tell us where the job is and what the problem looks like. We’ll give you a clear quote before any work starts.
Advice
Landlord and commercial work in Heaverham
Hotels need rooms back in use, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
Landlords and letting agents in Heaverham can book us as well as homeowners. Sealant work between tenants is a simple way to keep a property in good order before the next move-in.
What we are called out for in Heaverham
Joint shape matters as much as the product. A thin smear across a wide gap has nothing to it, and a gap filled solid cannot flex. Backing rod sets the right depth.
It’s worth asking for a quote if you see:
- Old mastic that has gone black or come away
- Gaps where the sill meets the wall
- Whistling draughts around closed windows
- Gaps between the frame and the inside reveal
Rented homes near Kemsing 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.
Questions to ask before you book
- How the joint is cleaned and prepared
- Whether the sealant suits the joint
- When the joint can take water or movement
- What happens if the job turns out different