Kent · England
Sand Mastic in Dunk's Green
Sand mastic for Dunk's Green and the surrounding area: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Mastic that needs renewing before redecorating
- Mastic round period door frames that has failed
- Cement or filler used on old window joints that has cracked
About our sand mastic in Dunk's Green
On many period windows, sand mastic looks right and suits the building. On modern frames we’d normally use a flexible sealant and we will explain which is best for yours. If you are dealing with gaps round a timber door in stone or brick and window mastic to renew ahead of painting, we can put it right, whatever the surface.
Homes in small places like Dunk's Green often stand in the open, with little to shelter their windows from wind and rain. Exposed frames and sills lose their mastic sooner than sheltered ones.
Big or small, you get the same one-year guarantee.
- Where
- Dunk's Green (TN11)
- Region
- Kent
- Cover
- A year, on every job
- Price
- A clear price before work begins
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Common questions in Dunk's Green
Do you cover smaller places like Dunk's Green?
Yes. Dunk's Green is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Do you cover Dunk's Green for sand mastic?
Yes. We work across London and the South East, and Dunk's Green is part of that. You can ring 0345 464 0079 or send us an email and tell us what needs doing, and we’ll give you a clear price.
Can sand mastic be painted?
Sand mastic is normally left unpainted, which is what traditional guidance recommends. Ask us before decorating.
Will you leave a mess?
Tidy work is part of the job. Nearby surfaces are protected.
How long does sand mastic take to harden?
It forms a skin fairly soon and it hardens fully over a longer time. The weather and joint depth both affect it.
Do you work for hotels and businesses?
Yes. Commercial and hotel work is a large part of what we do. Working times can be discussed when we quote.
Is consent needed for window work on a listed home?
Your local planning authority is the one to ask. They’ll tell you if consent is needed for work to your windows.
Can landlords and businesses book you?
Yes. As well as homeowners, we work for landlords, agents, businesses and hotels.
What affects the quote in Dunk's Green
We do not publish a price list, because no two jobs are the same. What we look at:
- Whether old sealant or filler has to be cut out
- Whether there’s mould to deal with
- The number and length of the joints
- Which sealant suits the joint
Instead of a standard rate, we look at what your job involves: the amount of work, the old material and the access. You’ll know the price before we begin.
Asking for a quote
Photos help, but a description is a good start. Try to tell us:
- If it’s domestic, commercial or a hotel
- Pictures of the joints, sent by email
- Any previous sealing or DIY work
- The address or postcode of the job
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and email photos if that’s easy.
What the job involves on each surface
Brick reveals
We rake out the old mastic and pack deep voids before pointing.
Stone surrounds
The stone is treated with care while raking out the old mastic.
What we do, step by step
Most of a good job is in the preparation, and we don’t rush it. Every joint is cleaned and dried before new material goes in. All told, the work takes anything from a few hours to a full day, depending on how many windows. Somewhere like Dunk's Green 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 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
- Move anything stored near the joints
- Let us know if you’ve seen damp or leaks
- For business premises, tell us about site rules or sign-in
Getting a quote
Need a quote? Please ring 0345 464 0079 or drop us an email with a few details. We’ll explain what we’d do and send you a clear quote before any work starts.
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Other services in Dunk's Green
Looking after it afterwards
Once the sealant has cured, a few habits help it last:
- Check with your local planning authority if your home is listed
- Ask us before painting near the mastic
- Have rotten timber repaired before new mastic goes in
- Avoid patching sand mastic with silicone
Look at the mastic when you look over the windows. Catching cracks early keeps repairs small.
An open joint round the box lets weather through. Left, the gap tends to get bigger.
Dunk's Green homes and the weather
Historic houses like Old Soar Manor (about 0.9 miles north-east) are a reminder that the area around Dunk's Green 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 is traditional sand mastic. The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Rented homes near Borough Green & Wrotham station change hands often, and any sash windows need sound mastic to keep draughts and rain out. For an older house near a landmark such as Plaxtol Church, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Dunk's Green is about 4 miles north of Tonbridge, in Kent. Whether you’re in the middle of Dunk's Green or further out, sand mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Across Kent, we cover 922 places, and Dunk's Green is one of them. London is on our list too, about 24 miles from Dunk's Green.
Postcode districts we cover here for sand mastic: TN11. We also cover the places around Dunk's Green: Plaxtol (1 mile north), Roughway (1 mile east), Claygate Cross (2 miles north), Crouch (2 miles north) and Pittswood (2 miles south). Larger places within reach include Maidstone (10 miles east), Dartford (14 miles north), Sevenoaks (6 miles west), Royal Tunbridge Wells (8 miles south), Gravesend (13 miles north) and Tonbridge (4 miles south).
What’s near Dunk's Green
Around Dunk's Green, our work takes us to homes and buildings near Hadlow Rural Community School, The Kentish Rifleman Public House and Ivy Hatch Nature Reserve and the streets around them. For rail, the closest station is Borough Green & Wrotham station, about 2.8 miles north. Other landmarks nearby include Tonbridge Cottage Hospital (5.3 miles south) and Ightham Court (3.1 miles north). Green spaces nearby include Barden Lake.
Signs you need sand mastic in Dunk's Green
Over the years, sand mastic weathers. It hardens, cracks and starts to come away from the frame or the masonry.
These are the problems we are asked about most:
- Draughty sash windows at the surround
- Mastic worn away on windows facing the weather
- Cracked mastic round a front door frame
- Mastic that needs renewing before redecorating
For site and facilities teams at buildings such as Plaxtol Primary School, the mastic around its windows and doors needs looking after like any other building’s.
What your quote should include
- Whether they’re fully insured
- What the cure time is
- Is the old sealant removed completely?
- Which colour the sealant will be
When it is not the sealant
Before you book, it’s worth knowing the limits:
- Planning or listed building consent (your local planning authority decides)
- Masonry that needs repairing
- Sash cords, weights and draught-proofing of the sashes
If in doubt, ring 0345 464 0079 or drop us an email and we will say what we think.
What we seal
- Timber door frames
- Stone surrounds
- Brick reveals
- Sash and case windows
- Tenement windows
- Period & listed homes
Landlords, agents and businesses in Dunk's Green
Housing providers, facilities teams and property managers book us too. We can quote a run of properties together, and we are fully insured.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.