Kent · England
Sand Mastic in Cowden
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for Cowden, backed by a one-year guarantee. Ask us for a quote.
- Mastic round period door frames that has failed
- A silicone bead on a sash window that spoils the look
- Old cement repairs round a window that have failed
Windows and doors in Cowden
Historic houses like Bassetts Manor (about 1.7 miles south) are a reminder that the area around Cowden has older buildings as well as new. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic. Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Homes close to Church of St Mary Magdalene include some older properties, and the joint between an old wall and a newer frame is generally the first place rain gets in.
Cowden is about 5 miles east of East Grinstead, in Kent. For sand mastic in and around Cowden, please call 0345 464 0079 or drop us an email for a quick quote. We cover Kent from our Crawley base. Cowden is one of 922 places in Kent we cover for sand mastic. For nearby work, see our Crawley page.
Work in TN8 is quoted and booked the same way as anywhere else. Whether your property is on High Street, Church Street and Chantlers Mead or anywhere close by, we can help. Nearby, we also carry out sand mastic in Stick Hill (2 miles north), Hammerwood (2 miles west), Marsh Green (3 miles north-west), Ashurst Wood (4 miles south-west) and Dormansland (4 miles west). Further out, we also cover Sevenoaks (10 miles north-east), Royal Tunbridge Wells (8 miles east), Tonbridge (9 miles north-east), Paddock Wood (13 miles east), Southborough (7 miles east) and Edenbridge (4 miles north).
Local landmarks in Cowden
We work in homes and buildings around The Crown Inn, among other places. For rail, the closest station is Cowden station, roughly 1 mile north-east. Nearby you’ll also find Queen Victoria Hospital (4 miles west) and Bolebroke Castle (1.8 miles south).
Sand mastic in Cowden
We renew sand mastic around sash windows and doors set in stone or brick. Out comes the old, loose mastic, the joint is prepared and new mastic is shaped by hand. We’re often asked to deal with mastic dropping out of the joint and silicone on a period window that looks wrong, across sash and case windows, stone surrounds and period & listed homes.
In a village or hamlet like Cowden, older cottages and farmhouses often have timber windows set in stone or brick. Older buildings like these do not always suit modern silicone, so the sealant has to be chosen to suit the building.
The work is covered for a year after we finish. If anything isn’t right with it, phone 0345 464 0079 or drop us an email.
- Where
- Cowden (TN8)
- Wider area
- Kent
- Guarantee
- One year on every job
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Work for landlords, hotels and businesses
Letting agents and landlords in Cowden can book us as well as homeowners. Sealant work between tenants is a simple way to keep a property in good order before the next move-in.
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance that we can handle for you.
DIY sealant or a professional job?
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.
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
When it isn’t the sealant
We’d rather tell you now than do work that will not last, so here’s what sealant can’t put right:
- Whether work needs listed building consent
- Crumbling stone or brickwork round the window
- Sashes that rattle, stick or won’t open
If you are not sure, just call 0345 464 0079 or drop us an email and we will give you a straight answer.
Surfaces we seal
- Timber door frames
- Brick reveals
- Sash and case windows
- Tenement windows
- Period & listed homes
- Stone surrounds
Also in Cowden
Signs you need sand mastic in Cowden
Over the years, sand mastic weathers. It hardens, cracks and starts to come away on the stone or timber.
The most common problems we see are:
- Gaps round a timber door in stone or brick
- Failed mastic on an exposed elevation
- Gaps between timber frames and stone or brick
- Old sand mastic that has cracked, crumbled or fallen out
Rented homes near Cowden station change hands often, and cracked sand mastic around sash windows lets in the draughts tenants complain about.
What your quote should include
- The length of the guarantee
- What insurance they hold
- What preparation is included
- Whether the sealant suits the joint
Keeping the joints in good condition
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Get any rot dealt with first
- Plan mastic work ahead of painting
- Ask us before painting near the mastic
- Go gently near the mastic when preparing windows
Avoid painting over the new mastic, which is the traditional advice. Ask us before any decorating around it.
Once mastic starts to crumble, rain gets in. It can soak into the frame and the surrounding masonry so early renewal protects both.
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 work itself takes a few hours per window, depending on the condition of the joints. Somewhere like Cowden needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- We check each window surround and the condition of the joint.
- We rake out the old mastic and clean the joint.
- Large voids are packed out.
- New sand mastic is applied and shaped by hand.
- We finish the mastic to a tidy line.
Preparing for the visit
- For business premises, tell us about site rules or sign-in
- Tell us about access, such as stairs, a lift or high-level joints
- Move anything stored near the joints
How to get a quote
To get a quote, phone 0345 464 0079 or email us with the location and a short description of the problem. We’ll send you a clear quote before any work starts.
Advice
Common questions in Cowden
Is Cowden within the area you cover?
Yes, smaller places are covered as well as towns. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Do you cover Cowden for sand mastic?
Yes, Cowden is within the area we cover. We work across London and the South East. Just ring 0345 464 0079 or drop us an email with a few details of the job.
Do you work for hotels and businesses?
Yes, regularly. We can plan bigger jobs in stages.
I rent my home. Can I book you?
Of course. Check with your landlord; we can send the quote to them too.
Do I need to be at home?
It depends on the job. For work indoors, someone needs to let us in.
Do the sealants smell?
That depends on the sealant. Some smell for a while, some hardly at all, and any smell fades as they cure.
Do I need permission for sand mastic on a listed building?
Speak to your local planning authority before work starts. Sand mastic is often favoured as like for like but the decision is theirs.
What do you put in the joint?
It depends on the joint: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. We use products from Arbo and Everbuild.
What happens if it’s left?
Not every draught comes from the sashes themselves. Open mastic joints round the box can let air in, and renewing the mastic closes them. In a small place like Cowden, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed. Call for a quick quote and we’ll go through it with you.
Why book with us
- Fully insured
- Experience in homes, commercial sites and hotels
- Rated 4.9 stars on Google
- 20+ years of sealant experience
Take a look at our cost guide or customer reviews.