East Sussex · England
Sand Mastic in Boarshead
We cover Boarshead for traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old material cut out, joints cleaned and sealed neatly and every job guaranteed for a year.
- Failed mastic on an exposed elevation
- Cement or filler used on old window joints that has cracked
- Mastic dropping out of the joint
Sand mastic in Boarshead
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 period homes, it looks right where silicone wouldn’t. If you have silicone on a period window that looks wrong and mastic worn away on windows facing the weather, we can help.
Homes in small places like Boarshead 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 our one-year guarantee, wherever you are in East Sussex.
- Where
- Boarshead (TN6)
- Wider area
- East Sussex
- Cover
- One year on every job
- Quote
- A clear price before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
What sealant work cannot fix
Before you book, it’s worth knowing the limits too:
- Sashes that rattle, stick or won’t open
- Decayed frames that need repair
- Planning or listed building consent (your local planning authority decides)
If in doubt, ring 0345 464 0079 or drop us an email and we will say what we think before you book.
Joints and surfaces we work on
- Timber door frames
- Sash and case windows
- Period & listed homes
- Stone surrounds
- Brick reveals
- Tenement windows
Surface by surface
Tenement and terrace windows
Rows of sash windows on tenements and terraces often need renewing together. We can do one window or several.
Timber door frames
Period doors in stone or brick openings are often pointed with sand mastic. The method is the same as for windows.
What sand mastic looks like in Boarshead
With historic houses such as Groombridge Place (about 3.3 miles north) nearby, there’s older building stock in the area around Boarshead as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Historic houses such as Groombridge Place, about 3.3 miles north, show how far back building around Boarshead goes. For site and facilities teams at buildings such as Beacon Academy, larger buildings have plenty of frames, and the mastic around each one ages. For landlords with property near Eridge station, any sash windows need sound mastic to keep draughts and rain out.
Boarshead is about 2 miles north-east of Crowborough, in East Sussex. Boarshead gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Across East Sussex, we cover 289 places, and Boarshead is one of them. You can also see our page for Crawley, roughly 17 miles from Boarshead.
We cover every part of TN6 for sand mastic and the streets around it. Boarshead sits on or near the A26, which makes travel easy. If you’re just outside Boarshead, we cover Steel Cross (1 mile south), Jarvis Brook (1 mile south), Crowborough (2 miles south-west), Mott's Mill (2 miles north) and Marden's Hill (2 miles west). Within a short drive, we also cover Hailsham (15 miles south), Uckfield (8 miles south-west), South Malling (15 miles south-west), Heathfield (8 miles south), Upper Horsebridge (14 miles south) and Cliffe (15 miles south-west).
Landmarks near Boarshead
Locally, jobs take us to homes and businesses close to The Boars Head Inn, among other places. The closest station to Boarshead is Eridge station, about 1.4 miles north-east. Other landmarks nearby include Crowborough War Memorial Hospital (1.8 miles south-west) and Bolebroke Castle (4.9 miles north-west). The countryside around Boarshead includes Crowborough Country Park.
Quotes for sand mastic in Boarshead
Some jobs are bigger than they look, and some smaller. What affects the quote:
- How much there is to do
- Any mould that needs treating
- Any working-time requirements on site
- The number of rooms or windows
What you pay reflects the work, not a rough estimate. That’s why we ask a few questions first.
What we need to know
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- Where the property is
- Photos by email, if that is easy
- What the problem is, such as mould, gaps, leaks or cracking
- If it’s domestic, commercial or a hotel
There’s no standard price list, because every job is different. Instead, your job gets its own clear quote. To arrange one, phone 0345 464 0079 or send us an email.
Aftercare tips
A little care helps the new joints last. Our advice:
- Ask the planning authority about consent for listed or conservation-area homes
- Go gently near the mastic when preparing windows
- Avoid patching sand mastic with silicone
- Check the mastic when you check the paintwork
Avoid painting over the new mastic, as traditional guidance advises. If you’re redecorating, ask us first.
Good mastic helps keep the frame dry. Once it fails, water can sit against the timber and timber that stays wet can rot.
DIY sealant or a professional job?
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
How the visit works
We keep the work tidy and contained to the joints we’re treating, so you can get on with your day. Expect the work to take a few hours per window, depending on the condition of the joints, and we tell you how long to leave it before we go. In a small place like Boarshead, access is normally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We look at the surrounds with you and agree the joints to renew.
- Old mastic and any loose material are raked out.
- We pack any deep voids first.
- We apply the mastic by hand and shape it.
- We dress the finish so it sits neatly against the masonry.
How to prepare
- Clear the area around the work
- Tell us about any previous sealing or DIY attempts
- On commercial sites, let us know about site rules
Ask for a quote
Call for a quick quote, or email us if that’s easier. Tell us about the joints that need doing and we will explain what’s involved.
Related advice
Also near Boarshead
More services for Boarshead
What happens if it’s left?
Filling over old, loose mastic does not last. Raking out and preparing the joint gives it a sound base so the new work lasts. Older cottages and farmhouses around Boarshead can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
We don’t show prices on the website, because the cost depends so much on the job itself. Call for a quick quote and we will talk you through it.
What you get with us
- Neat joints and a tidy finish
- Old sealant always removed completely
- A 12-month guarantee on all work
- Fully insured
Your questions about sand mastic in Boarshead
Is Boarshead within the area you cover?
Yes, we do. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Can you help a landlord with a rental near Eridge station?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or email us and tell us about the property, and we will give you a clear price.
Do you guarantee sand mastic work?
You get our 12-month guarantee on every job.
Do you remove the old sealant?
Always. Sealing over old sealant is the main reason resealing fails early, and it’s something we never do.
How long will you be here?
As a guide, most jobs take a few hours per window, depending on the condition of the joints. Bigger jobs take longer, and we’ll tell you how long to expect.
Should I try DIY first?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. Most DIY failures come from sealing over old material, wet joints or too much sealant.
Does someone need to be in?
For indoor joints, yes, someone needs to let us in. Once we’ve agreed the job, you don’t need to watch us work.
Is it possible to take out silicone and use sand mastic instead?
Yes, we do this often. All the old silicone is removed first so the mastic beds in well.