Kent · England
Sissinghurst Window Mastic
Mastic around window and door frames, sills and patio doors for Sissinghurst, backed by a 12-month guarantee. Call for a quick quote.
- Gaps left after new windows were fitted
- Whistling draughts around closed windows
- Rain getting in at the frame or under the sill
Sissinghurst homes and the weather
The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Rented homes near Staplehurst station change hands often, and sound mastic around windows and doors keeps out the draughts and damp that tenants notice first. If you live in an older home near Church of the Holy Trinity, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Sissinghurst is about 11 miles south of Maidstone, in Kent. Homes, rented property, offices and hotels in Sissinghurst is covered for window mastic. Every job comes with our one-year guarantee. Sissinghurst is one of 922 towns and villages in Kent we cover for window mastic. You can also see our page for Crawley, roughly 32 miles from Sissinghurst.
Our applicators cover all of the TN17 postcode area for window mastic and the streets around it. You will find streets such as The Street, Milkhouse Cottages and Cobnut Close. Other places close to Sissinghurst include Wilsley Pound (1 mile west), Cranbrook Common (1 mile north), Wilsley Green (1 mile south-west), Knox Bridge (2 miles north) and Colliers Green (2 miles west). Within a short drive, we also cover Maidstone (11 miles north), Ashford (14 miles east), Royal Tunbridge Wells (13 miles west), Tonbridge (14 miles north-west), Kings Hill (13 miles north-west) and Foley Park (12 miles north).
Local landmarks in Sissinghurst
In Sissinghurst, that means homes and buildings near Crane Valley and The Bull Public House and the streets around them. Sissinghurst’s nearest station is Staplehurst station, about 4.3 miles north. Nearby you will also find Sissinghurst Castle (1.1 miles east) and Benenden Hospital (3.1 miles south-east).
Window mastic in Sissinghurst, done properly
Frames and walls don’t move together. Heat and cold make frames grow and shrink against brick or render that hardly moves. That is why the joint needs a flexible, low-modulus sealant rather than something rigid. We work on aluminium frames, composite doors and uPVC windows, and common reasons people get in touch are water coming in at the bottom corners of a door and sealant in the wrong colour for the frame.
Somewhere as small as Sissinghurst, older homes often have timber frames set in stone or brickwork. Not every older frame suits a modern silicone bead, so the sealant has to be chosen to suit the building.
Big or small, it’s backed by our 12-month guarantee.
- Where
- Sissinghurst (TN17)
- Region
- Kent
- Cover
- 12 months on all our work
- Quotes
- A clear price before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Also near Sissinghurst
Also in Sissinghurst
Surface by surface
Window sills
Stone and concrete sills have their own joints, and the joint under the frame can let rain run behind. We seal those with a sealant suited to masonry.
Patio & French doors
The joints around patio doors run a long way, top, sides and threshold. Most leaks start at the bottom corners, so we pay close attention there.
Landlords, agents and businesses in Sissinghurst
Housing providers, facilities teams and property managers book us too in Sissinghurst and across Kent. Several sites can go on one quote, and we are fully insured.
Hotels need rooms back in use, so we plan the work room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
When to call us in Sissinghurst
Every frame moves through the day. A plastic or aluminium frame lengthens in sunshine and shortens as it cools, while the brick or render around it hardly moves. If the sealant can’t stretch, it splits.
If you can see any of these, it’s time to have the joints looked at:
- Gaps where the sill meets the wall
- Cold air getting in at the frame edge
- Mastic that is falling out in pieces
- Hard, cracked sealant around windows
If you look after a building such as Cranbrook School, its window and door frames need their mastic kept sound, just like a home’s.
What to look for in a quote
- Which sealant they’ll use, and why
- What insurance they hold
- Who turns up on the day
- The length of the guarantee
Why deal with it now?
Running fresh sealant over the old joint is tempting, but it won’t grip old, dirty sealant. It peels before long, and water still gets in behind. The old mastic has to come out. In a small place like Sissinghurst, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
There are no prices on our website, because the cost depends so much on the job itself. For a quick quote, please ring 0345 464 0079 or send us an email and we’ll talk you through it.
Why Sissinghurst customers choose us
- Domestic, commercial and hotel work
- Approved under the ARBOMaster scheme
- Every job guaranteed for a year
- Over 20 years’ experience
Keeping the joints in good condition
Good habits help new joints last longer. Our tips:
- Wash the frames with mild soapy water
- Keep drainage slots and sill grooves clear
- Air rooms to keep condensation down around windows
- Check the mastic once a year
Wipe the frames with soapy water when you clean the windows, and avoid solvent cleaners on the sealant.
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. If you notice one, it’s time to get the joint looked at.
How we quote for window mastic
Call for a quick quote. The main things that affect it are:
- Mould in or behind the old joints
- The product the joint needs
- How many rooms, windows or areas are involved
- How easy the joints are to reach
What it costs depends on how much there is to do, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before work begins.
Helping us quote
Before you ask for a quote, have a think about:
- The address or postcode of the job
- Roughly how big the job is
- Whether it’s a home or a business
- Whether it has been sealed before
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is. When it suits you, phone 0345 464 0079 or send us an email.
How it works
You do not need to clear the whole room or building, just the space around the work. Everything nearby is protected, and the work takes anything from an hour or two to a full day, depending on how many frames there are for a typical job. Somewhere like Sissinghurst needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- We start by checking each window and door with you.
- We remove the old mastic and clean the frame and the wall.
- Deep gaps are filled with backing rod to set the depth.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- We clear up and check every joint is fully closed.
Before we arrive
- Mention any tricky access
- Plan for the work area to be out of bounds to pets and children
- Tell us if parking is tricky
Getting a quote
For a quote, call 0345 464 0079 or email us with the location and a short description of the problem. You’ll have a clear quote before any work starts.
Advice
Sissinghurst questions
Do you cover Sissinghurst for window mastic?
Yes, Sissinghurst is within the area we cover. We work across London and the South East. You can phone 0345 464 0079 or email us and tell us what needs doing, and we’ll give you a clear price.
I let a flat near Staplehurst station. Can you help?
Yes, we work for landlords and letting agents. You can ring 0345 464 0079 or drop us an email with the address and a few details, and we will give you a fixed price before any work starts.
Can you do upstairs windows?
Yes, where they can be reached safely. Tell us about access when you get in touch so we can plan the job.
Do you have insurance?
Yes. We’re fully insured, and we have been doing sealant work for more than 20 years.
Where is Mr Mastic based?
We are a Crawley-based firm, with over 20 years’ experience. We work across South East England, London and Scotland.
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.
Do I need to be at home?
That depends on where the joints are. Inside work needs someone to give us access, while outside work can sometimes be arranged differently.
What information do you need?
The location, the problem and the rough size of the job. Photos by email help too.