Kent · England
Window Mastic in Sinkhurst Green
Specialist window mastic for Sinkhurst Green: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Whistling draughts around closed windows
- Rain getting in at the frame or under the sill
- Untidy mastic left by window fitters
Window mastic in Sinkhurst Green, done properly
Behind a thin line of old mastic there’s sometimes a deep void. Packing it solid with sealant gives a joint that cannot flex, so we fit backing rod to set the right depth. That way the new bead bonds to the frame and the wall only. We work on window sills, uPVC windows and timber windows & doors, and the jobs we see most are cracked internal joints between frame and plaster and mastic that’s falling out in pieces.
Somewhere as small as Sinkhurst Green, 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.
All our work comes with our 12-month guarantee.
- Where
- Sinkhurst Green (TN17)
- Region
- Kent
- Cover
- 12 months on all our work
- Quotes
- A clear price before work begins
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Honest limits
Some problems need a builder, plumber or other trade rather than us:
- Penetrating damp from a failed cavity tray or render
- Condensation trapped between the panes
- Worn gaskets, brush seals or a door that has dropped
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we’ll tell you honestly before booking.
What we seal
- Patio & French doors
- Composite doors
- Aluminium frames
- Timber windows & doors
- Window sills
- uPVC windows
Nearby places to Sinkhurst Green
More services for Sinkhurst Green
The process
There is not much for you to do on the day. Show us the job and we’ll take it from there. The job generally takes most of a day for a typical house, less for a few frames from start to finish. In a small place like Sinkhurst Green, access is usually the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We start by checking each window and door with you.
- We remove the old mastic and clean the frame and the wall.
- Where gaps are deep, backing rod goes in first.
- A flexible, weatherproof sealant is applied in a colour to suit the frame.
- Finally we tidy up and check each joint.
Getting ready for the visit
- Keep pets and children clear of the area while we work
- Clear items away from the joints we are working on
- For business premises, tell us about site rules or sign-in
Get a quote
There’s no standard price list. Instead, your job gets its own clear quote. To get started, call 0345 464 0079 or email us.
Related advice
How the job changes by surface
Patio & French doors
The joints around patio doors run a long way, top, sides and threshold. The threshold and the bottom corners take the most water, so we pay close attention there.
Aluminium frames
Aluminium needs a sealant that bonds to coated metal, and acetoxy silicones aren’t used, as they can attack some metals. Neutral-cure sealant is the safe choice.
Quotes for window mastic in Sinkhurst Green
Every job gets its own quote. This is what makes a difference:
- Working hours on commercial sites
- How easy the joints are to reach
- Any mould that needs treating
- Whether old sealant or filler has to be cut out
Doing several joints on one visit usually makes better use of the time than several visits, so tell us about everything that needs sealing. You’ll get one clear quote for the whole job.
Helping us quote
When you contact us, it’s useful to know:
- Pictures of the joints, sent by email
- The address or postcode of the job
- The rough size of the job
- What the problem is, such as mould, gaps, leaks or cracking
We quote each job on its own, so start by telling us what you need. Simply ring 0345 464 0079 or drop us an email and describe the job.
Keeping the joints in good condition
How long the joints last depends on use and care. Here’s what we suggest:
- Ventilate rooms so frames don’t stay wet inside
- Walk round the house once a year and look at the joints
- Clean frames with a soft cloth and soapy water
- Keep paint off silicone joints
On timber frames, keep the paintwork in good order, since wood that gets wet swells and shrinks more. Paint up to the joint, not over the silicone.
Water trapped behind a failed joint can start rot in timber frames and sills. Rotten timber needs a joiner, not a sealant, so early resealing is worth it.
DIY sealant or a professional job?
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions.
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
Common questions in Sinkhurst Green
Do you cover Sinkhurst Green for window mastic?
Yes. We work across London and the South East, and Sinkhurst Green is part of that. You can call 0345 464 0079 or email us and tell us what needs doing.
Do you cover smaller places like Sinkhurst Green?
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.
Is the work guaranteed?
Yes, with our 12-month guarantee. A yearly look at the joints helps them last.
Is it messy?
We keep the work tidy. We protect what’s around the joints, and we clear up when we’re done.
What information do you need?
Tell us what needs doing and where, plus photos if you have them. If we need more, we’ll ask.
What does window mastic cost?
Size, access and the old material all affect the cost. Ask us for a quote and we will talk you through it.
How long before the joint can be used?
That depends on the sealant used, so follow the cure time we give you when we finish.
Do I need to be at home?
Access is agreed with you when the job is booked. Indoors, that generally means someone at home.
What window mastic looks like in Sinkhurst Green
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Letting a property close to Headcorn station? Then cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets. If you live in an older home near Church of St Mary, the joint between an old wall and a newer frame is generally the first place rain gets in.
Sinkhurst Green is about 8 miles south of Maidstone, in Kent. Anywhere in TN17, we cover window mastic for homes and businesses. Our Kent coverage runs to 922 places, Sinkhurst Green among them. Our Crawley page covers work nearby (34 miles or so).
All of TN17 is covered for window mastic, from the main roads to the quietest streets. Nearby, we also carry out window mastic in Frittenden (1 mile south), Knox Bridge (2 miles south-west), Hawkenbury (2 miles north), Staplehurst (2 miles north-west) and Cranbrook Common (2 miles south-west). Larger places within reach include Maidstone (8 miles north), Ashford (12 miles east), Sittingbourne (15 miles north-east), Royal Tunbridge Wells (14 miles west), Tonbridge (14 miles west) and Kings Hill (11 miles north-west).
Near you in Sinkhurst Green
Locally, jobs take us to homes and businesses close to Bell And Jorrocks Public House and the streets around them. The nearest railway station is Headcorn station, about 2 miles north-east. A little further out are Kent Firefighting Museum (1.6 miles south-east) and Benenden Hospital (4.6 miles south).
When to call us in Sinkhurst Green
Plenty of failed mastic was poorly applied in the first place. Mastic laid onto dusty, damp or crumbling surfaces didn’t grip properly, and it lets go sooner than it should.
The problems people usually mention when they call include:
- Draughty joints inside around the window
- Untidy mastic left by window fitters
- Cracked or shrunken mastic around the frame
- Cold air getting in at the frame edge
For site and facilities teams at buildings such as Frittenden Church of England Primary School, larger buildings have plenty of frames, and the mastic around each one ages.
Comparing quotes
- Is VAT in the price?
- Which colour the sealant will be
- How the joint is cleaned and prepared
- Is the old sealant removed completely?