Kent · England
Sand Mastic in Westwell
Professional sand mastic in and around Westwell, with old sealant always removed completely and a 12-month guarantee.
- Silicone on a period window that looks wrong
- Cracked mastic round a front door frame
- Window mastic to renew ahead of painting
Work for landlords, hotels and businesses
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. Several properties can be quoted together.
How we handle sand mastic in Westwell
On many period windows, sand mastic looks right and suits the building. Newer frames usually get a flexible sealant instead and we’ll explain which is best for yours. We work on sash and case windows, tenement windows and brick reveals, and people most often call us about modern sealant on a period surround and open joints round the window box.
Outdoor sealant needs dry, clean surfaces, so work on frames around Westwell is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
Every job comes with a 12-month guarantee, wherever you are in Kent.
- Place
- Westwell (TN25)
- Region
- Kent
- Guarantee
- One year on every job
- Quote
- A clear price before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
What happens on the day
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. For most jobs that takes a few hours for a single window, longer for several, and the area is left clean. Somewhere as small as Westwell, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We look at the surrounds with you and agree the joints to renew.
- Old mastic and any loose material are raked out.
- Deep gaps are packed so the mastic sits at the right depth.
- The sand mastic is mixed and pressed into the joint by hand.
- We dress the finish so it sits neatly against the masonry.
Preparing for the visit
- Mention any sign-in or site rules at work premises
- Where the joints are inside, avoid wetting them before we arrive
- Mention any tricky access
Get a quote
We quote each job on its own, so the first step is telling us about yours. Just call 0345 464 0079 or send us an email with the details.
Read more
Honest limits
A few problems are outside what sealant work can do:
- Decisions on consent for listed homes
- Cracked or broken glass
- Rotten sashes, sills or window boxes (a joiner’s job)
If in doubt, ring 0345 464 0079 or email us and we’ll say what we think.
Joints and surfaces we work on
- Stone surrounds
- Brick reveals
- Tenement windows
- Sash and case windows
- Timber door frames
- Period & listed homes
Common problems we fix in Westwell
Shallow joints are a common cause. A thin layer doesn’t hold well, which is why we pack deep voids first and get the depth right.
People generally contact us when they notice one of these:
- Mastic worn away on windows facing the weather
- Window mastic to renew ahead of painting
- A silicone bead on a sash window that spoils the look
- Old sand mastic that has cracked, crumbled or fallen out
Rented homes near Charing station change hands often, and cracked sand mastic around sash windows lets in the draughts tenants complain about.
Comparing quotes
- How long the guarantee is
- Who does the work, and how experienced they are
- Whether you can choose the colour
- Whether they seal over old material or remove it
Aftercare tips
So the new joints stay in good condition:
- Do not run silicone over sand mastic
- Ask us before painting near the mastic
- Check the mastic when you check the paintwork
- Check with your local planning authority if your home is listed
Keep paint scrapers and sanders off the mastic when redecorating. It can be damaged by heavy scraping.
Good mastic helps keep the frame dry. Once it fails, water can sit against the timber, which can lead to rot.
DIY sealant or a professional job?
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
What the job involves on each surface
Timber door frames
Sand mastic is used round timber door frames too. The method is the same as for windows.
Sash and case windows
Most of our sand mastic work is on sash windows. We renew the mastic round each box.
Sand mastic in Westwell: local notes
Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. With historic houses such as Godinton House (about 2.3 miles south) nearby, there’s older building stock in the area around Westwell as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
For site and facilities teams at buildings such as The Hayesbrook School, its window and door frames need their mastic kept sound, just like a home’s. In the older streets around Church of St Mary, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Westwell is about 4 miles north of Ashford, in Kent. For sand mastic in and around Westwell, please ring 0345 464 0079 or send us an email for a quick quote. We’re based in Crawley and cover Kent, Westwell included. Westwell is one of 922 places in Kent we cover for sand mastic. Chelmsford is on our list too, about 41 miles from Westwell.
Our applicators cover all of TN25 for sand mastic and the streets around it. We also cover the places around Westwell: Tutt Hill (1 mile south-west), Ram Lane (1 mile west), Potters Corner (1 mile south), Westwell Leacon (2 miles west) and Hothfield (2 miles south-west). We also work in nearby towns such as Maidstone (15 miles west), Ashford (4 miles south), Canterbury (12 miles north-east), Sittingbourne (11 miles north-west), Whitstable (14 miles north-east) and Faversham (9 miles north).
Landmarks near Westwell
The closest station to Westwell is Charing station, about 2.6 miles north-west of the centre. Well-known places in the area include County Square (3.2 miles south) and William Harvey Hospital (4.6 miles south-east).
Towns and villages near Westwell
Also in Westwell
Common questions in Westwell
Can you do sand mastic in Westwell?
Yes. We work across London and the South East, and Westwell is part of that. Just call 0345 464 0079 or send us an email with a few details of the job.
I let a flat near Charing station. Can you help?
Yes, we work for landlords and agents. You can ring 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before work begins.
What should I tell you?
Where the job is, what the problem is and roughly how big it is. If you can, email a few photos.
Do you offer different sealant colours?
In most cases you can choose. We’ll tell you which colours the right product comes in and agree one before work begins.
Will you leave a mess?
We keep the work tidy. We protect what’s around the joints, and we clear up when we are done.
Is there any odour?
There can be a smell while the sealant cures, but it fades. Opening a window helps.
Do you take out the old sealant first?
Yes. Sealing over old sealant is the main reason resealing fails early, and it’s something we never do.
What do you put in the joint?
Products from Arbo and Everbuild, among others, chosen to suit the joint. We explain the product when we quote.