Kent · England
Sand Mastic in Warmlake
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for householders, landlords and businesses in Warmlake. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Draughty sash windows at the surround
- Gaps between timber frames and stone or brick
- Patchy fillers round a sash window
Sand mastic for homes and businesses in Warmlake
Fresh sand mastic forms a skin quite soon, but it takes longer to harden fully. Traditionally, sand mastic is left unpainted, so ask us before you decorate. We work on period & listed homes, timber door frames and brick reveals, and common reasons people get in touch are tired mastic found when preparing windows for paint and mastic dropping out of the joint.
Mastic can only go onto a dry, clean joint, so window work in Warmlake is booked around the forecast. Tell us about access to every side of the house, including upper-floor windows.
You get a 12-month guarantee, the same in Warmlake as everywhere else we work.
- Place
- Warmlake (ME17)
- Region
- Kent
- Cover
- One year on every job
- Price
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
What happens on the day
At the end, we look at the finished work together and tell you how long to leave it. The work normally takes a few hours for a single window, longer for several, depending on the size of the job. Somewhere as small as Warmlake, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We start by checking each surround and agreeing the joints to renew.
- We rake out the old mastic and clean the joint.
- Deep voids are packed so the mastic is the right thickness.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- The finish is dressed so it sits neatly against the stone or brick.
Before we arrive
- Mention if the joints have been sealed before
- Tell us about access, such as stairs, a lift or high-level joints
- For indoor joints, keep the area dry beforehand if you can
Get a quote
To get a quote, call 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. We will send you a clear quote before any work starts.
Advice
How we quote for sand mastic
You will get a clear quote before any work starts. It takes into account:
- How many areas need sealing
- The type of sealant required
- Any mould that needs treating
- Whether the work is at height
A few things move the cost up or down: the old material and how easily it comes out, whether mould needs treating, and whether the work is at height. Your quote takes all of that into account.
Helping us quote
You do not need to know the technical terms. Just tell us:
- Photos by email, if that is easy
- If someone has resealed it before
- The type of property
- The problem you’ve noticed
Every job is quoted individually, so the first step is telling us about yours. Just ring 0345 464 0079 or send us an email with the details.
What we can’t put right
Sealant isn’t the answer to every problem, and we’d rather say so up front. Sealant won’t put right:
- Sash cords, weights and draught-proofing of the sashes
- Damaged stone surrounds
- Planning or listed building consent (your local planning authority decides)
Not sure which it is? You can call 0345 464 0079 or send us an email and we’ll tell you honestly before booking.
Where we work in Warmlake
- Stone surrounds
- Sash and case windows
- Period & listed homes
- Tenement windows
- Brick reveals
- Timber door frames
Aftercare tips
So the new joints stay in good condition:
- Ask us before painting near the mastic
- Have rotten timber repaired before new mastic goes in
- Go gently near the mastic when preparing windows
- Avoid patching sand mastic with silicone
When preparing windows for paint, take care around the mastic. It can be damaged by heavy scraping.
Fine cracks show the mastic is starting to fail. Renewing it then is simpler than waiting until it falls out.
Surface by surface
Sash and case windows
A sash window’s box frame sits in the masonry opening. The gap round it is pointed with sand mastic.
Tenement and terrace windows
Where a building is shared, window work may involve neighbours, so check who is responsible first.
Why deal with it now?
An open joint round the frame lets weather in. Left, water can reach the timber and the wall so renewing it early protects the window. Around Warmlake, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
The cost depends on the size of the job, how much old material has to come out and access to the work. You’ll have a clear quote before any work starts.
What you get with us
- Rated 4.9 stars on Google
- More than 20 years in sealant work
- An ARBOMaster approved applicator
- Tidy, careful work
See how sealant jobs are priced and our reviews.
Also near Warmlake
What else we do in Warmlake
Your questions about sand mastic in Warmlake
Can you do sand mastic in Warmlake?
Yes. Our work covers London and the South East, and Warmlake is part of that. You can call 0345 464 0079 or send us an email and tell us what needs doing, and we will give you a clear price.
Do you work for landlords with property near Hollingbourne station?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before any work starts.
Are you fully insured?
Yes. We’re fully insured, and we can confirm the details when we quote.
Can you replace silicone on a period window with sand mastic?
In most cases. The silicone is cut out and the joint cleaned, then point it with sand mastic.
How long does sand mastic take?
That depends on the amount of work, but as a guide it takes a few hours per window, depending on the condition of the joints. We will give you a better idea when we quote.
Which products do you use?
The product depends on the job: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. Brands we use include Arbo and Everbuild.
Is there any odour?
It depends on the product. Some smell for a while, some hardly at all, and any smell fades as they cure.
What should I tell you?
Where the job is, what the problem is and roughly how big it is. Photos by email help too.
Warmlake homes and the weather
With historic houses such as Stoneacre (about 2.1 miles north) nearby, there’s older building stock in the area around Warmlake as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic. London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
In the older streets around Church of St Michael, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. Schools such as Sutton Valence Primary School are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages.
Warmlake is about 4 miles south-east of Maidstone, in Kent. Every kind of property in Warmlake can book us for sand mastic. Every job comes with our one-year guarantee. Warmlake is one of 922 towns and villages in Kent we cover for sand mastic. London is on our list too, about 35 miles from Warmlake.
Jobs for sand mastic in ME17 works the same way as everywhere else we cover. You’ll find streets such as Warmlake Orchard, Oast Gardens and Maidstone Road, all of which we cover. Other places close to Warmlake include Five Wents (1 mile north), Sutton Valence (1 mile south), Langley Heath (1 mile north), Langley (1 mile north) and Chart Sutton (1 mile west). Within a short drive, we also cover Maidstone (4 miles north-west), Ashford (13 miles south-east), Sittingbourne (10 miles north-east), Royal Tunbridge Wells (15 miles south-west), Tonbridge (14 miles west) and Faversham (14 miles north-east).
What’s near Warmlake
Typical jobs here are in homes near The Plough Inn, among other places. Warmlake’s nearest station is Hollingbourne station, about 3.3 miles north-east. A little further out are KIMS hospital (4.6 miles north) and The Dog Collar Museum (2.3 miles north-east).
When to call us in Warmlake
Some old mastic was never deep enough. Mastic that’s too thin cracks and drops out so we make sure the new mastic is the right thickness.
People generally contact us when they notice one of these:
- Modern sealant on a period surround
- Old sand mastic that has cracked, crumbled or fallen out
- Gaps between timber frames and stone or brick
- Cement or filler used on old window joints that has cracked
For landlords with property near Hollingbourne station, cracked sand mastic around sash windows lets in the draughts tenants complain about.
Comparing quotes
- Who does the work, and how experienced they are
- Is the old sealant removed completely?
- When the joint can take water or movement
- The length of the guarantee