Kent · England
Throwley Forstal Window Mastic
Professional window mastic in and around Throwley Forstal, with every bit of old sealant taken out first and a 12-month guarantee.
- Draughty joints inside around the window
- Rain getting in at the frame or under the sill
- Old mastic that has gone black or come away
For landlords and businesses
For anyone letting property in or around Throwley Forstal, several properties can be quoted together. Just tell us the addresses and what each one needs.
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we will quote.
How we handle window mastic in Throwley Forstal
Around Throwley Forstal we seal all kinds of frames: from uPVC casements to timber and aluminium, plus patio doors, French doors and sills. The sealant is chosen to suit the frame material and the wall. We work on window sills, aluminium frames and uPVC windows, and the jobs we see most are cracked or shrunken mastic around the frame and white mastic on grey or black frames.
Somewhere as small as Throwley Forstal, older homes often have timber frames set in stone or brickwork. Not every older frame suits a modern silicone bead, and sometimes a traditional sand mastic is the better choice.
You get a 12-month guarantee, the same in Throwley Forstal as everywhere else we work.
- Where
- Throwley Forstal (ME13)
- Wider area
- Kent
- Guarantee
- 12 months on all our work
- Quote
- A clear price before we start
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
What sealant work cannot fix
Sealant is not the answer to every problem, and we’ll tell you before work begins. It will not solve:
- Misting between the panes of a double-glazed unit (that needs a new unit)
- Damp coming through the wall itself rather than the frame joint
- A door that needs adjusting, rehanging or new seals
If you’re not sure, just ring 0345 464 0079 or send us an email and we will give you a straight answer.
Where we work in Throwley Forstal
- uPVC windows
- Composite doors
- Aluminium frames
- Window sills
- Timber windows & doors
- Patio & French doors
Do you need window mastic in Throwley Forstal?
Joints that are too thin or too deep fail early. A thin smear across a wide gap has nothing to it, and a gap filled solid can’t flex. Backing rod sets the right depth.
Keep an eye out for these signs:
- Damp patches on the reveal after heavy rain
- Black, perished sealant on frames
- Sealant in the wrong colour for the frame
- Leaking joints at the ends of sills
Homes close to Church of St Michael and All Angels include some older properties, and replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
What to look for in a quote
- What happens if they find a problem under the old sealant
- How long the guarantee is
- What the quote includes, VAT included or not
- How much experience the applicator has
Keeping the joints in good condition
How long the joints last depends on use and care. Here’s what we suggest:
- Repaint timber before it’s bare
- Do not use solvent cleaners on the joint
- Paint up to the joint, not over it
- Look round the frames every year or so
Timber frames need their paint kept up, 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.
Towns and villages near Throwley Forstal
Also in Throwley Forstal
What affects the cost of window mastic
The price is agreed before any work begins. It takes into account:
- How much old sealant there is and how hard it is to remove
- Any mould that needs treating
- The product the joint needs
- Access and height
What it costs depends on the size of the job, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before we start, so you know where you stand.
Helping us quote
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- The problem you’ve noticed
- A few pictures by email, if you can
- If it’s domestic, commercial or a hotel
- Roughly how big the job is
If you’re in Throwley Forstal and need window mastic, ring 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
Your questions about window mastic in Throwley Forstal
Do you cover Throwley Forstal for window mastic?
Yes, Throwley Forstal is within the area we cover. Our work covers London and the South East. You can call 0345 464 0079 or drop us an email and tell us what needs doing.
Is Throwley Forstal within the area you cover?
Yes, we do. We work across London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Can tenants book the work?
Of course. Ask your landlord first, and we can send them the quote if that helps.
Will the old sealant be removed?
Yes. All of the old material is cut out and the joint cleaned before resealing.
Are you fully insured?
Yes. We are fully insured, and we have been doing sealant work for more than 20 years.
Where do you work from?
We work from Crawley. We cover Throwley Forstal and the rest of Kent, along with the rest of our area.
Do you guarantee window mastic?
Yes. Each job is covered for 12 months, inside or out.
Can resealing stop a draught around my window?
In many cases. The gap between frame and wall is a common source of draughts, and resealing inside and out closes it.
Different surfaces, different methods
Patio & French doors
Patio and French doors have the longest joints on most houses. The threshold and the bottom corners take the most water, so we pay close attention there.
Aluminium frames
Bi-fold and sliding aluminium doors have long frame joints, and the threshold joint takes a lot of water. We prepare and reseal every joint, backing the deep ones.
What we do, step by step
You do not need to clear the whole room or building before we come, just the space around the work. We protect the rest, and the work takes a few hours for a handful of frames, longer for a whole house in most cases. For a village or hamlet like Throwley Forstal, 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 check each frame and agree which ones need doing.
- The old mastic is cut out and the surfaces cleaned back.
- We fit backing rod in deep gaps so the sealant is the right depth.
- We apply a weatherproof sealant to match the frame and tool it neatly.
- Every joint is checked before we leave.
Before we arrive
- Where the joints are inside, avoid wetting them before we arrive
- Let us know if you’ve seen damp or leaks
- Keep pets and children clear of the area while we work
Get a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and add photos by email if you can.
Related advice
What window mastic looks like in Throwley Forstal
Historic houses like Belmont House and Gardens (about 1.1 miles north) are a reminder that the area around Throwley Forstal has older buildings as well as new. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic. 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.
Letting a property close to Selling station? Then renewing tired window mastic between tenants heads off draught and damp complaints.
Throwley Forstal is about 4 miles south of Faversham, in Kent. Wherever you are in the ME13 postcode area, our applicators can take on window mastic. Our Kent coverage runs to 922 places, Throwley Forstal among them. Our Chelmsford page covers work nearby (37 miles or so).
Postcode districts we cover here for window mastic: ME13. We also cover Throwley (1 mile north), Badlesmere (1 mile east), Sheldwich (2 miles north-east), Sheldwich Lees (2 miles north-east) and The Valley (2 miles west). Further out, we also cover Maidstone (14 miles west), Ashford (8 miles south), Canterbury (10 miles east), Sittingbourne (8 miles north-west), Whitstable (10 miles north-east) and Faversham (4 miles north).
Local landmarks in Throwley Forstal
For rail, the closest station is Selling station, roughly 4.1 miles east. Nearby you will also find Newnham Castle (3 miles north-west).