East Sussex · England
Sand Mastic in Old Heathfield
Window and door surrounds in Old Heathfield need attention? We cut out the old, prepare the joints and apply the right sealant.
- Crumbling sand mastic round a window
- Patchy fillers round a sash window
- Silicone on a period window that looks wrong
How it works
We work through the job in order: protect, prepare, seal, tidy. Typically it takes a few hours for a single window, longer for several and we leave things clean and tidy. Somewhere like Old Heathfield 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.
- Each surround is checked first.
- We rake out the old mastic and clean the joint.
- We fill deep gaps so the new mastic is not too thick.
- We point the joint with sand mastic by hand.
- The finish is dressed neatly.
How to prepare
- Let us know if you’ve seen damp or leaks
- Let us know about parking restrictions
- Where the joints are inside, avoid wetting them before we arrive
Getting a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we’ll explain what’s involved.
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Sand mastic for homes and businesses in Old Heathfield
Sand mastic does not last for ever, leaving gaps round the window. Renewing it closes the gap so the surround looks right again. If you have old cement repairs round a window that have failed and wind and rain getting in round a sash window, we can help, on sash and case windows, period & listed homes and timber door frames alike.
Outdoor sealant needs dry, clean surfaces, so work on frames around Old Heathfield is planned for dry weather. Tell us about access to every side of the house, including upper-floor windows.
A one-year guarantee comes as standard.
- Where
- Old Heathfield (TN21)
- Wider area
- East Sussex
- Cover
- One year on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Why act early in Old Heathfield
Silicone might seem the quicker option, but it can look wrong on a period surround. Sand mastic is the traditional material and blends with the stone or brick. In a small place like Old Heathfield, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
Leaving a failed joint normally makes the job bigger, not smaller, because water and mould keep working on it. If you are not sure whether it needs doing, call 0345 464 0079 or email us for an honest opinion and a quote.
Why Old Heathfield clients choose us
- One-year guarantee on every job
- Anti-fungal sanitary silicone in wet areas
- Neat joints and a tidy finish
- Arbo and Everbuild products
Read what affects the cost or what customers say.
Aftercare tips
To keep the joints looking good and working properly:
- Have rotten timber repaired before new mastic goes in
- Renew mastic before redecorating the windows
- Go gently near the mastic when preparing windows
- Check the mastic when you check the paintwork
Leave the new mastic unpainted, as traditional guidance advises. Ask us before any decorating around it.
Small cracks are a sign the mastic is ageing. Renewing it then is simpler than waiting until it falls out.
Work for landlords, hotels and businesses
We work for letting agents and landlords as well as homeowners. Resealing between tenancies keeps a property looking cared for before the next move-in.
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we’ll give you a quote.
Towns and villages near Old Heathfield
Also in Old Heathfield
Can I do it myself?
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
What we can’t put right
Before you book, it’s worth knowing the limits:
- Sashes that need overhauling
- Timber that has rotted
- Damaged stone surrounds
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we will tell you honestly before you book.
Surfaces we seal
- Tenement windows
- Timber door frames
- Period & listed homes
- Stone surrounds
- Sash and case windows
- Brick reveals
Windows and doors in Old Heathfield
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. With historic houses such as Bateman's (about 4.9 miles north-east) nearby, there’s older building stock in the area around Old Heathfield 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.
Managing a site like Heathfield Community College? Then the mastic around its windows and doors needs looking after like any other building’s. For an older house near a landmark such as The Parish Church of All Saints, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Old Heathfield is about 7 miles north of Hailsham, in East Sussex. Jobs in Old Heathfield get the same care as everywhere else we work: old sealant removed completely, careful preparation and a one-year guarantee. Old Heathfield is one of 289 towns and villages in East Sussex we cover. We also work in Brighton, about 20 miles from Old Heathfield.
We cover every part of TN21 for sand mastic and the streets around it. That includes homes and businesses on School Hill and Church Street and the roads around them. Nearby, we also carry out sand mastic in Cade Street (1 mile north), Sandy Cross (1 mile west), Heathfield (1 mile west), Broad Oak (1 mile north) and Warbleton (1 mile south). Larger places within reach include Eastbourne (12 miles south), Hastings (14 miles south-east), Bexhill-on-Sea (11 miles south-east), Seaford (15 miles south-west), Lewes (13 miles south-west) and Hailsham (7 miles south).
Around Old Heathfield
In Old Heathfield, that means homes and buildings near The Star Inn and Parkside Community Primary School. Nearby you will also find Hellingly Hospital (5 miles south) and Old Castle (3.6 miles east). The countryside around Old Heathfield includes Selwyns Wood.
Old Heathfield: your questions answered
Do you cover Old Heathfield for sand mastic?
Yes. Our work covers London and the South East, and Old Heathfield is part of that. Just phone 0345 464 0079 or email us with a few details of the job, and we will give you a clear price.
Is Old Heathfield within the area you cover?
Yes. Old Heathfield is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Is it OK to seal over old sealant?
No, because it fails. We remove every bit of old sealant first.
Do I need permission for sand mastic on a listed building?
Check with your local planning authority. They’ll tell you if consent is needed.
What’s sand mastic made of?
It’s sand mixed with a linseed-oil-based binder for the joint between timber frames and masonry.
What do you need from me for a quote?
Just the basics: the address or postcode, what’s wrong and any access issues. After that, simply ring 0345 464 0079 or send us an email.
Do you do commercial work?
Yes. Commercial and hotel work is a large part of what we do. We can talk about working times when we quote.
Can you replace silicone on a period window with sand mastic?
Normally, yes. Once the silicone is out and the joint prepared, sand mastic is applied by hand.
What the job involves on each surface
Period and listed homes
Many older homes were built with sand mastic round the windows. On listed buildings, check with your planning authority first.
Sash and case windows
Sash windows are where we do most sand mastic work. Each joint round the box is raked out and renewed.