East Sussex · England
Sand mastic for sash & case windows in Wellbrook, East Sussex
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homeowners, landlords and businesses in Wellbrook. Fully insured, ARBOMaster approved and guaranteed for a year.
- Gaps round a timber door in stone or brick
- Gaps between timber frames and stone or brick
- Old cement repairs round a window that have failed
Sand mastic in Wellbrook, done properly
On many period windows, sand mastic looks right and suits the building. Newer frames usually get a flexible sealant instead, and we will talk through which suits your home. If you have mastic that needs renewing before redecorating and gaps round a timber door in stone or brick, we can help.
Outdoor sealant needs dry, clean surfaces, so work on frames around Wellbrook 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, so you’re not left on your own once the job is done.
- Where
- Wellbrook (TN20)
- Wider area
- East Sussex
- Guarantee
- A year, on every job
- Quotes
- A clear price before we start
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
How it works
When we arrive, we look over the joints with you first, so you know exactly what we’re doing. We protect the surfaces around the joints before any work starts. The work usually takes a few hours for a single window, longer for several. In a small place like Wellbrook, access is generally the main thing to plan. 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.
- Old, loose mastic is raked out and the joint cleaned.
- Large voids are packed out first, so the mastic is not too thick.
- 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.
Getting ready for the visit
- Let us know about earlier repairs to the joints
- Mention any leaks or damp you’ve noticed
- For indoor joints, keep the area dry beforehand if you can
Ask for a quote
For sand mastic in Wellbrook, ring 0345 464 0079 or email us. Tell us what the problem is and where, and you will get a clear quote before any work starts.
Related advice
What sealant work cannot fix
We’d rather tell you now than do work that will not last, so here’s what sealant can’t put right:
- Crumbling stone or brickwork round the window
- Whether work needs listed building consent
- Timber that has rotted
If in doubt, call 0345 464 0079 or drop us an email and we will say what we think before booking.
Where we work in Wellbrook
- Timber door frames
- Tenement windows
- Period & listed homes
- Brick reveals
- Stone surrounds
- Sash and case windows
Common problems we fix in Wellbrook
Decorating can disturb tired mastic. Many people find it crumbling when they prepare the windows, which is a good time to renew it.
Keep an eye out for these signs:
- Draughts and rain around sash boxes
- Gaps between timber frames and stone or brick
- Modern sealant on a period surround
- Gaps round a timber door in stone or brick
Schools such as Mayfield Church of England Primary School are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages.
What to look for in a quote
- Whether they seal over old material or remove it
- What the quote includes, VAT included or not
- What product goes in the joint
- The length of the guarantee
Different surfaces, different methods
Stone surrounds
Stone surrounds suit sand mastic well. The finish blends with the masonry.
Brick reveals
Sand mastic is also used where timber frames meet brick. It gives a traditional finish.
Should I try it myself first?
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
A DIY attempt does not rule out a professional job. We remove it and do the joint properly, so just mention it when you contact us.
Places near Wellbrook
Other services in Wellbrook
Looking after it afterwards
No joint lasts for ever, but care makes a real difference. Our tips:
- Clear gutters so water does not pour onto the windows
- Take care around the mastic when scraping paint
- Renew mastic before redecorating the windows
- Inspect the joints round the windows every year or so
Make sure water drains away from the window surround. Constant wetting wears the mastic faster.
An open joint round the box lets weather through. The longer it’s left, the more the joint opens as more mastic falls out.
Landlord and commercial work in Wellbrook
Landlords and agents in Wellbrook can book us as well as homeowners. Sealant work between tenants keeps a property looking cared for.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
Questions from Wellbrook
Do you cover Wellbrook for sand mastic?
Yes. Our work covers London and the South East, and Wellbrook is part of that. Just ring 0345 464 0079 or send us an email with a few details of the job, and we’ll give you a clear quote.
Do you work for landlords with property near Crowborough station?
Yes, landlords and agents are among the people we work for. Just call 0345 464 0079 or email us with the address and what needs doing, and we will give you a clear price.
Should I try DIY first?
Some simple jobs can be done by a careful DIYer. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Is it possible to paint over sand mastic?
The usual advice is to leave sand mastic unpainted. If you’re redecorating the window, ask us first and we will advise.
How long does the job take?
Typically it takes a few hours per window, depending on the condition of the joints. Larger jobs naturally take longer, and we’ll tell you how long to expect.
Are you ARBOMaster approved?
Yes. We are an ARBOMaster approved applicator.
Do you offer different sealant colours?
In most cases you can choose. We will tell you which colours the right product comes in and agree one before we start.
What is sand mastic?
Sand mastic is a traditional material for pointing round windows and doors. It’s made with sand and a linseed-oil-based binder.
Wellbrook homes and the weather
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.
For landlords with property near Crowborough station, cracked sand mastic around sash windows lets in the draughts tenants complain about. In the older streets around Church of St. Dunstan, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Wellbrook is about 4 miles south-east of Crowborough, in East Sussex. Homes, rented property, offices and hotels in Wellbrook can book us for sand mastic, old or new, large or small. The work is guaranteed for a year. Wellbrook is one of 289 towns and villages in East Sussex we cover. You can also see our page for Crawley, roughly 20 miles from Wellbrook.
Jobs for sand mastic in TN20 is quoted and booked the same way as anywhere else. Whether your property is on Rothermead, Roselands Avenue and Wellbrook or anywhere close by, we can help. Neighbouring places we cover for sand mastic include Woolbridge (1 mile north-west), Mayfield (1 mile north-east), Butcher's Cross (1 mile west), Skippers Hill (1 mile south-west) and Five Ashes (1 mile south-west). Larger places within reach include Bexhill-on-Sea (15 miles south-east), Lewes (14 miles south-west), Hailsham (10 miles south), Crowborough (4 miles north-west), Uckfield (7 miles south-west) and Polegate (13 miles south).
Landmarks near Wellbrook
Typical jobs here are in homes near The Royal Oak Inn and St Leonards-Mayfield School, among other places. The closest station to Wellbrook is Crowborough station, roughly 3.3 miles north-west of the centre. Other landmarks nearby include Crowborough War Memorial Hospital (4.6 miles north-west). The countryside around Wellbrook includes Crowborough Country Park.