Kent · England
Sand mastic for sash & case windows in Harvel, Kent
Sand mastic for Harvel and the surrounding area: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Gaps between timber frames and stone or brick
- Tired mastic found when preparing windows for paint
- Silicone on a period window that looks wrong
How we handle sand mastic in Harvel
Across Harvel, we renew sand mastic around sash and case windows. Each joint is raked out, prepared and pointed by hand for a neat, traditional finish. We work on timber door frames, sash and case windows and brick reveals, and the jobs we see most are cement or filler used on old window joints that has cracked and mastic dropping out of the joint.
Somewhere as small as Harvel, 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.
Our work is backed for twelve months, in Harvel and everywhere else we cover.
- Location
- Harvel (DA13)
- Wider area
- Kent
- Guarantee
- 12 months on all our work
- Quote
- A clear price before work begins
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Looking after it afterwards
How long the joints last depends on use and care. We suggest:
- Inspect the joints round the windows every year or so
- Keep sills and gutters clear so water drains away
- Leave the new mastic unpainted
- Get any rot dealt with first
Keep paint scrapers and sanders off the mastic when redecorating. It can be damaged by heavy scraping.
An open joint round the box lets weather through. The longer it’s left, the more the joint opens.
DIY sealant or a professional job?
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
If you do try it yourself, take your time over the 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.
Common questions in Harvel
Is Harvel in your area for sand mastic?
Yes. We work across London and the South East, and Harvel is part of that. You can call 0345 464 0079 or email us and let us know what needs doing, and we will send you a clear quote.
Do you cover smaller places like Harvel?
Yes. Harvel 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.
How do I get a quote for sand mastic in Harvel?
Every job is different, so each one gets its own quote. For a quick quote, ring 0345 464 0079 or drop us an email and tell us what needs doing and where.
Is it OK to seal over old sealant?
No, because it fails. The old sealant always comes out first.
Can you match the sealant colour?
We’ll suggest a colour to suit the surroundings. The choice depends on the product the joint needs.
Do you have insurance?
Yes. We’re fully insured for domestic and commercial work.
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 normally get a flexible sealant.
Do I need permission for sand mastic on a listed building?
Your local planning authority is the one to ask. They’ll tell you if consent is needed for work to your windows.
What happens on the day
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. Typically it takes a few hours for a single window, longer for several, and the area is left clean. Somewhere like Harvel needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- We check each window surround and the condition of the joint.
- We rake out the old mastic and clean the joint.
- We fill deep gaps so the new mastic isn’t too thick.
- We point the joint with sand mastic by hand.
- We finish the mastic to a tidy line.
Getting ready for the visit
- Mention any tricky access
- Let us know about earlier repairs to the joints
- Clear the area around the work
Get a quote
For sand mastic in Harvel, call 0345 464 0079 or drop us an email. Tell us what the problem is and where, and we will agree the price before any work begins.
Advice
What sand mastic looks like in Harvel
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. With historic houses such as Cobham College (about 3.4 miles north-east) nearby, there’s older building stock in the area around Harvel as well as newer homes. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
Letting a property close to Sole Street station? Then any sash windows need sound mastic to keep draughts and rain out. Schools such as Culverstone Green Primary School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s.
Harvel is about 6 miles south of Gravesend, in Kent. Anywhere in DA13, our applicators can take on sand mastic. Across Kent, we cover 922 places, Harvel among them. For nearby work, see our London page (23 miles or so).
Postcode districts we cover here for sand mastic: DA13. If you need sand mastic at a property on St Francis Road, Hart Lane and Harvel Street or anywhere close by, our applicators can take on the job. We also cover the places around Harvel: Priestwood Green (1 mile north), Culverstone Green (1 mile south-west), Priestwood (1 mile north), South Street (1 mile north-west) and Vigo Village (1 mile south). Larger places within reach include Maidstone (9 miles south-east), Dartford (9 miles north-west), Sevenoaks (9 miles south-west), Royal Tunbridge Wells (15 miles south), Gravesend (6 miles north) and Tonbridge (11 miles south).
Landmarks near Harvel
We work in homes and buildings around Meopham School and Trosley Country Park. For rail, the closest station is Sole Street station, roughly 2.7 miles north. Nearby you’ll also find Leybourne Castle (3.6 miles south-east) and Coldrum Long Barrow (1.6 miles south). Not far away are Ranscombe Farm.
Nearby places to Harvel
More services for Harvel
Do you need sand mastic in Harvel?
Sand mastic slowly weathers. It dries out, cracks and loses its grip on the stone or timber.
People usually contact us when they notice something like this:
- Modern sealant on a period surround
- Mastic dropping out of the joint
- Window mastic to renew ahead of painting
- Wind and rain getting in round a sash window
In the older streets around Church of Our Lady of the Meadow, the joint between an old wall and a newer frame is normally the first place rain gets in.
Questions to ask before you book
- Whether the sealant suits the joint
- What happens if they find a problem under the old sealant
- How the surfaces are prepared before sealing
- What insurance they hold
How we quote for sand mastic
Some jobs are bigger than they look, and some smaller. The main factors:
- Access and height
- Which sealant suits the joint
- The size of the job
- Any working-time requirements on site
The cost reflects the work involved, not a rough estimate. That’s why we ask about the job first and agree the price before starting.
What we need to know
You don’t need to know the technical terms. Just tell us:
- How many joints, rooms or windows are involved
- Any access issues, like height or stairs
- Pictures of the joints, sent by email
- The problem you’ve noticed
Need a quote? Please ring 0345 464 0079 or send us an email with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.
Landlords, agents and businesses in Harvel
If you manage several properties in or around Harvel, jobs at different addresses can be quoted together. Just tell us the addresses and what each one needs, and photos by email help.
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. We can quote for more than one property at once.
Why it’s worth doing now in Harvel
New sash windows are a major, costly change and on a listed home, consent may be needed. If the frames are sound, renewing the mastic deals with gaps and draughts at the surround. Where a wall is exposed, as many are in small places like Harvel, wind-driven rain gets into any failed joint, 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, along with when we can work on site. Call for a quick quote and we’ll go through it with you.
Why book with us
- Domestic, commercial and hotel work
- More than 20 years in sealant work
- Rated 4.9 stars on Google
- ARBOMaster approved applicator
Take a look at how sealant jobs are priced and our reviews.