Kent · England
Knox Bridge Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in Knox Bridge, with a 12-month guarantee on every job. Ask us for a quote.
- Cracked mastic round a front door frame
- Draughts and rain around sash boxes
- Gaps between timber frames and stone or brick
Sand mastic in Knox Bridge, done properly
Sand mastic suits most period window surrounds. Newer frames normally get a flexible sealant instead, and we’ll talk through which suits your home. We work on brick reveals, timber door frames and period & listed homes, and common reasons people get in touch are modern sealant on a period surround and patchy fillers round a sash window.
Somewhere as small as Knox Bridge, 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.
The work is covered for a year after we finish. If there’s a problem with it, please phone 0345 464 0079 or drop us an email.
- Place
- Knox Bridge (TN17)
- Region
- Kent
- Cover
- 12 months on all our work
- Price
- A clear price before we start
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Keeping the joints in good condition
Simple care keeps the joints in good condition. We recommend:
- Find out about consent before window work on a listed home
- Ask a joiner to look at soft timber first
- Keep sills and gutters clear so water drains away
- Leave the new mastic unpainted
Avoid painting over the new mastic, as traditional guidance advises. Ask us before any decorating around it.
An open joint round the box lets weather through. The longer it’s left, the more the joint opens.
Also near Knox Bridge
More services for Knox Bridge
When it isn’t the sealant
New sealant cannot fix everything, and we will tell you before work begins. Sealant will not put right:
- Crumbling stone or brickwork round the window
- Timber that has rotted
- Sashes that need overhauling
If in doubt, ring 0345 464 0079 or send us an email and we will say what we think before you book.
What we seal
- Tenement windows
- Timber door frames
- Stone surrounds
- Period & listed homes
- Brick reveals
- Sash and case windows
What the job involves on each surface
Stone surrounds
Stone openings are rarely perfectly straight, so the joint varies in width. We shape it by hand to follow the stone.
Brick reveals
Sand mastic is also used where timber frames meet brick. It suits older brickwork.
Frames and glazing around Knox Bridge
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Around Knox Bridge, as everywhere, sand mastic is only as good as the preparation behind it. Rented homes near Staplehurst station change hands often, and any sash windows need sound mastic to keep draughts and rain out.
Knox Bridge is about 9 miles south of Maidstone, in Kent. Our applicators cover sand mastic for homes and businesses in Knox Bridge and the surrounding area, as part of our work across Kent. 922 places in Kent are on our list, large and small. You can also see our page for Crawley, about 32 miles away.
Postcode districts we cover here for sand mastic: TN17. We also cover the places around Knox Bridge: Cranbrook Common (1 mile south), Frittenden (1 mile east), Sinkhurst Green (2 miles north-east), Sissinghurst (2 miles south) and Staplehurst (2 miles north). We also work in nearby towns such as Maidstone (9 miles north), Ashford (13 miles east), Royal Tunbridge Wells (12 miles west), Tonbridge (13 miles west), Kings Hill (11 miles north-west) and Foley Park (10 miles north).
Local landmarks in Knox Bridge
For rail, the closest station is Staplehurst station, roughly 2.4 miles north. Nearby you’ll also find Benenden Hospital (4.4 miles south-east) and Sissinghurst Castle (1.9 miles south-east).
The process
Our applicators work methodically: protect, prepare, seal, tidy. For most jobs that takes anything from a few hours to a full day, depending on how many windows, and the area is left clean. In a small place like Knox Bridge, access is normally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- Each surround is checked first.
- We rake out the old mastic and clean the joint.
- We fill deep gaps so the new mastic isn’t too thick.
- New sand mastic is applied and shaped by hand.
- The finish is dressed neatly.
Preparing for the visit
- Let us know about parking restrictions
- Tell us about any water getting in
- Clear the area around the work
How to get a quote
To get a quote, call 0345 464 0079 or send us an email with the location and a short description of the problem. We will give you a clear quote before any work starts.
Related advice
Your questions about sand mastic in Knox Bridge
Is Knox Bridge within the area you cover?
Yes. Knox Bridge is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Is Knox Bridge in your area for sand mastic?
Yes. We work across London and the South East, and Knox Bridge is part of that. Just call 0345 464 0079 or drop us an email with a few details of the job, and we’ll send you a clear quote.
Do you work for hotels and businesses?
Yes. We’ve worked for hotels, offices and other businesses, and we are fully insured.
Which is right for my windows, sand mastic or modern sealant?
It depends on the window. On many period windows, sand mastic looks right and suits the building and newer frames generally get a flexible sealant.
What should I tell you?
The location, the problem and the rough size of the job. If you can, email a few photos.
Are you fully insured?
Yes. Mr Mastic is fully insured, with over 20 years’ experience in sealant work.
Can you match the sealant colour?
Usually, yes. Sealants come in white, clear, grey and other colours, and we’ll agree it with you first.
Will it make a mess?
We keep the work tidy. Nearby surfaces are protected, and the area is left clean when we finish.
Work for landlords, hotels and businesses
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Resealing at the right time is simple maintenance.
We also work for property managers and facilities teams. Several sites can go on one quote, and we’re fully insured for the work.
What happens if it’s left?
Not every draught comes from the sashes themselves. Gaps between the frame and the wall can be just as bad and new mastic seals them. Older cottages and farmhouses around Knox Bridge can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Homes and businesses are quoted the same way: how much there is to do, how we reach it and what it needs, plus any working-time requirements on site. Ask us for a quote and we’ll explain what it covers.
Why book with us
- Old sealant always removed completely
- Rated 4.9 stars on Google
- Fully insured
- Experience in homes, commercial sites and hotels
Take a look at what affects the cost or customer reviews.
Should I try it myself first?
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and getting the depth right matters as much as the look.
If you’re 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 fails, we can still redo it.