Kent · England
Sand mastic for sash & case windows in Ashurst, Kent
Window and door surrounds in Ashurst need attention? We cut out the old, prepare the joints and apply the right sealant.
- Mastic round period door frames that has failed
- Window mastic to renew ahead of painting
- Mastic dropping out of the joint
How we handle sand mastic in Ashurst
Sand mastic has long been used to fill the joint between timber frames and masonry. It’s a mix of sand and a linseed-oil-based binder, applied by hand. On older homes, it suits the building far better than silicone. We’re often asked to deal with gaps round a timber door in stone or brick and weathered mastic on the most exposed windows, on tenement windows, timber door frames and stone surrounds.
Homes in small places like Ashurst often stand in the open, with little to shelter their windows from wind and rain. That exposure dries out and cracks the mastic around frames and sills faster.
All our work is covered by a 12-month guarantee, wherever you are in Kent.
- Location
- Ashurst (TN3)
- Region
- Kent
- Guarantee
- A year, on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Leave it or put it right?
New mastic over crumbling mastic won’t hold. We remove the loose material first so the new work lasts. In a small place like Ashurst, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
No two jobs are quite the same, so we quote each one individually. Size, access and the product the joint needs all make a difference.
Why choose Mr Mastic in Ashurst
- Any old sealant cut out fully, not covered over
- Over 20 years’ experience
- Trusted Arbo and Everbuild sealants
- Anti-fungal silicone where joints get wet
Read what affects the cost and customer reviews.
Quotes for sand mastic in Ashurst
Some jobs are bigger than they look, and some smaller. What affects the quote:
- Any working-time requirements on site
- The product the joint needs
- The old material and how stubborn it is
- Any mould that needs treating
What it costs depends on the size of the job, how much old material has to come out and how easy the joints are to reach. We give a clear quote before any work starts, so you know where you stand.
What to tell us for a quote
When you contact us, these details help:
- If it’s domestic, commercial or a hotel
- Roughly how big the job is
- Photos by email, if that is easy
- What the problem is, such as mould, gaps, leaks or cracking
For a quick quote, get us on the phone, or email us if that’s easier. Tell us about the joints that need doing and we will talk you through the work.
Keeping the joints in good condition
After the cure time, these simple habits help:
- Plan mastic work ahead of painting
- Take care around the mastic when scraping paint
- Look over the window mastic once a year
- Leave the new mastic unpainted
Make sure water drains away from the window surround. Constant wetting wears the mastic faster.
Fine cracks show the mastic is starting to fail. It’s easier to renew it before it drops out.
What sealant work cannot fix
We’d rather tell you now than do work that won’t last, so these are the limits:
- Timber that has rotted
- Sash cords, weights and draught-proofing of the sashes
- Putty and glazing repairs
Not sure which it is? You can call 0345 464 0079 or drop us an email and we will tell you honestly.
What we seal
- Tenement windows
- Timber door frames
- Brick reveals
- Stone surrounds
- Period & listed homes
- Sash and case windows
Ashurst homes and the weather
Historic houses like Groombridge Place (about 1.6 miles south-east) are a reminder that the area around Ashurst has older buildings as well as new. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. 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.
In the older streets around Church of St Martin of Tours, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. For landlords with property near Ashurst Kent station, any sash windows need sound mastic to keep draughts and rain out.
Ashurst is about 5 miles west of Royal Tunbridge Wells, in Kent. Homes, rented property, offices and hotels in Ashurst can book us for sand mastic, old or new, large or small. Every job comes with our 12-month guarantee. Ashurst is one of 922 places in Kent we cover. Our Crawley page covers work nearby, about 15 miles away.
We cover every part of TN3 for sand mastic and the streets around it. Sand mastic is available to properties on Ashurst Road, Clayton's Lane and Ashurst Hill. Neighbouring places we cover for sand mastic include Stone Cross (1 mile east), Teasley Mead (1 mile north-west), Fordcombe (1 mile north-east), Walter's Green (1 mile north) and Groombridge (2 miles south-east). Within a short drive, we also cover Sevenoaks (11 miles north), Royal Tunbridge Wells (5 miles east), Tonbridge (7 miles north-east), Kings Hill (15 miles north-east), Paddock Wood (11 miles east) and Southborough (5 miles north-east).
Around Ashurst
Ashurst has its own railway station: Ashurst Kent station. Well-known places in the area include Tunbridge Wells Homeopathic Hospital (4.4 miles east) and Bolebroke Castle (2.4 miles west). Open spaces near Ashurst include Broadwater Warren RSPB Reserve.
The process
All our tools and materials come with us in the van, so there’s nothing for you to buy. Once we have agreed what’s being done, we protect the area and start. Most jobs take a few hours per window, depending on the condition of the joints. Somewhere as small as Ashurst, 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.
- The mastic is mixed, pressed into the joint by hand and shaped.
- The finish is dressed so it sits neatly against the stone or brick.
Before we arrive
- Mention if the joints have been sealed before
- Mention any tricky access
- Let us know if you’ve seen damp or leaks
Get a quote
For 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’ll give you a clear price before any work starts.
Advice
What the job involves on each surface
Brick reveals
Sand mastic is also used where timber frames meet brick. It gives a traditional finish.
Stone surrounds
Stone surrounds suit sand mastic well. It finishes to look like part of the surround.
Landlord and commercial work in Ashurst
In hotels, rooms out of use cost money, so the work can be planned room by room. Hotel work is part of what we do, alongside homes and businesses.
Landlords and agents in Ashurst can book us as well as householders. Sealant work between tenants keeps a property looking cared for.
Your questions about sand mastic in Ashurst
I let a flat near Ashurst Kent station. Can you help?
Yes. We work for letting agents and landlords as well as householders, and several properties can go on one quote. Just ring 0345 464 0079 or drop us an email with the address and what needs doing, and we’ll send you a clear quote.
Do you cover Ashurst for sand mastic?
Yes, Ashurst is within the area we cover. Our work covers London and the South East. You can call 0345 464 0079 or email us and let us know what needs doing.
How long will you be here?
Most jobs take a few hours for a single window, longer for several, including the preparation. We’ll confirm how long when we quote.
Can new sealant go over the old?
No, it won’t last. It may look fine at first, but the new bead soon lifts. Removing the old sealant completely is the only lasting way.
Do you take out the old sealant first?
Yes, always, and completely. New sealant won’t bond properly to old, so any old material comes out before anything new goes in.
Which products do you use?
Products from Arbo and Everbuild, among others, picked for each joint. We explain the product when we quote.
How long does sand mastic take to go off?
The surface skins quite quickly, then hardens over a longer period. The weather and joint depth both affect it.
Should I try DIY first?
Sometimes. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.