Kent · England
Coursehorn Window Mastic
Our applicators work in Coursehorn on mastic around window and door frames, sills and patio doors. Old material cut out, joints cleaned and sealed neatly.
- Gaps between the frame and the inside reveal
- Rushed sealant from a window installation
- Rain getting in at the frame or under the sill
Landlords, agents and businesses in Coursehorn
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. Several properties can be quoted together.
Whether it’s one flat or a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
Window mastic for homes and businesses in Coursehorn
Some gaps around frames are far deeper than they look. Packing it solid with sealant gives a joint that cannot flex, so deep gaps get backing rod first. The sealant then grips the two sides it should. If you have gaps where the sill meets the wall and draughty joints inside around the window, we can put it right.
In a village or hamlet like Coursehorn, older cottages and farmhouses often have timber windows set in stone or brick. Not every older frame suits a modern silicone bead, so the sealant has to be chosen to suit the building.
All of our work is guaranteed for twelve months, and the guarantee is the same wherever you are.
- Where
- Coursehorn (TN17)
- Wider area
- Kent
- Cover
- A year, on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Nearby places to Coursehorn
Also in Coursehorn
How the visit works
Every visit runs the same way: we check the joints, protect the area around them, carry out the job and clear up. It generally takes a morning for a couple of windows and a door. For a village or hamlet like Coursehorn, the journey is planned in advance: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- We start by checking each window and door with you.
- Next the failed sealant is cut away and the joint cleaned.
- We fit backing rod in deep gaps so the sealant is the right depth.
- 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
- For business premises, tell us about site rules or sign-in
- For indoor joints, keep the area dry beforehand if you can
- Let us know about earlier repairs to the joints
Getting a quote
Asking for a quote is easy: let us know what needs doing and where. A few pictures by email make the job easier to understand, and we will take it from there.
Read more
DIY versus a professional finish
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
What we cannot put right
Sealant is not the answer to every problem, and we will tell you before any work starts. It won’t solve:
- Broken hinges, locks or handles
- A door that needs adjusting, rehanging or new seals
- Damp coming through the wall itself rather than the frame joint
If in doubt, ring 0345 464 0079 or email us and we’ll say what we think.
Where we work in Coursehorn
- Aluminium frames
- Patio & French doors
- Window sills
- Timber windows & doors
- Composite doors
- uPVC windows
What window mastic looks like in Coursehorn
The South East is one of 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 Dunstan include some older properties, and replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. Managing a site like Cranbrook School? Then its window and door frames need their mastic kept sound, just like a home’s.
Coursehorn is about 12 miles south of Maidstone, in Kent. Whether you’re in the middle of Coursehorn or further out, we cover window mastic for every kind of property, from flats and houses to offices and hotels. 922 places in Kent are on our list, from the larger towns to small villages. You can also see our page for Crawley, about 32 miles away.
Work in TN17 is quoted and booked the same way as anywhere else. We also cover the places around Coursehorn: Baker's Cross (1 mile west), Cranbrook (1 mile west), Swattenden (1 mile south-west), Hartley (2 miles south-west) and Benenden (2 miles south-east). Further out, we also cover Maidstone (12 miles north), Ashford (14 miles east), Royal Tunbridge Wells (13 miles west), Tonbridge (14 miles north-west), Kings Hill (14 miles north-west) and Foley Park (13 miles north).
Around Coursehorn
We work in homes and buildings around White Horse pub, Cranbrook Church of England Primary School and Crane Valley and the streets around them. Other landmarks nearby include Sissinghurst Castle (1.7 miles north-east) and Sissinghurst Castle (1.7 miles north-east).
Common questions in Coursehorn
Is Coursehorn within the area you cover?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Do you cover Coursehorn for window mastic?
Yes, Coursehorn is within the area we cover. Our work covers London and the South East. Just ring 0345 464 0079 or send us an email with a few details of the job, and we will give you a clear quote.
What should I tell you?
Only a few details: where it is, what you’ve noticed and how we reach it. After that, simply ring 0345 464 0079 or drop us an email.
What does window mastic cost?
Every job is different, so each one gets its own quote. For a quick quote, phone 0345 464 0079 or send us an email and tell us what needs doing and where.
Do I have to be there?
It depends on the job. For work indoors, someone needs to let us in, while outside work can sometimes be arranged differently.
Do the sealants smell?
Possibly a little. It fades as the sealant cures, and ventilation helps.
Can you quote for more than one area?
Yes, and it often makes sense. Combining jobs makes good use of the visit, so mention them when you ask for a quote.
Can you work on commercial sites?
Yes. We have worked for hotels, offices and other businesses.
What happens if it’s left?
Working on frames from a ladder with a sealant gun is not easy, especially on upper floors. A professional job is cut out properly, backed where needed and finished neatly, in a sealant suited to the wall. Older cottages and farmhouses around Coursehorn can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
The cost reflects the work involved, not guesswork. That is why we ask a few questions first.
Why Coursehorn clients choose us
- A sealant colour to suit the surroundings
- ARBOMaster approved applicator
- We agree the colour with you first
- Tidy, careful work
Read our cost guide or what customers say.
How we quote for window mastic
Some jobs are bigger than they look, and some smaller. What affects the quote:
- How many areas need sealing
- The product the joint needs
- Any mould that needs treating
- Any working-time requirements on site
Leaving a failed joint usually makes the job bigger, not smaller. If you’re unsure, ring 0345 464 0079 or email us and we’ll give you an honest view and a quote.
What to tell us for a quote
When you call or email, these details help:
- If it’s domestic, commercial or a hotel
- The rough size of the job
- What the problem is, such as mould, gaps, leaks or cracking
- If someone has resealed it before
We quote each job on its own. Simply ring 0345 464 0079 or drop us an email and describe the job and send photos if you have them.
Keeping the joints in good condition
To keep the joints looking good and working properly:
- Don’t aim a pressure washer at the joints
- Wipe condensation off the frames
- Paint up to the joint, not over it
- Clear any debris from frame drain holes
Most silicone sealants won’t take paint, so if you’re planning to paint the frames or walls, tell us beforehand. There are paintable sealants for joints that need it.
Water trapped behind a failed joint can start rot in timber frames and sills. Once wood has rotted, it needs repair before it can be sealed, so it pays to reseal before that happens.