Isle of Wight · England
Branstone Sand Mastic
Professional sand mastic in and around Branstone, with old sealant always removed completely.
- Window mastic to renew ahead of painting
- Gaps round a timber door in stone or brick
- Old cement repairs round a window that have failed
How it works
Our applicators work methodically: protect, prepare, seal, tidy. Typically it takes a few hours per window, depending on the condition of the joints, and the area is left clean. For a village or hamlet like Branstone, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- We start by checking each surround and agreeing the joints to renew.
- Old, loose mastic is raked out and the joint cleaned.
- We pack any deep gaps so the mastic sits at the right depth.
- 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
- Let us know about parking restrictions
- Tell us about any water getting in
- Mention any sign-in or site rules at work premises
Ask for a quote
We don’t publish a price list. Instead, your job gets its own clear quote. To arrange one, phone 0345 464 0079 or send us an email.
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Sand mastic in Branstone, done properly
Sand mastic is the traditional way to point the gap between a timber window frame and the stone or brick around it. It’s made from sand and a linseed-oil-based binder, applied by hand. On older homes, it suits the building far better than silicone. If you have cement or filler used on old window joints that has cracked and draughts and rain around sash boxes, we can put it right, whatever the surface.
Somewhere as small as Branstone, older homes often have timber frames set in stone or brickwork. Older buildings like these don’t always suit modern silicone, and sometimes a traditional sand mastic is the better choice.
Each job carries a 12-month guarantee, large or small.
- Place
- Branstone (PO36)
- Region
- Isle of Wight
- Cover
- One year on every job
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Can I do it myself?
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
A careful DIYer can reseal a simple joint, 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.
Honest limits
Honest advice matters more to us than a booking, so here’s what sealant can’t fix:
- Decisions on consent for listed homes
- Sashes that need overhauling
- Rotten sashes, sills or window boxes (a joiner’s job)
If you’re not sure, just phone 0345 464 0079 or send us an email and we will give you a straight answer before booking.
Where we work in Branstone
- Sash and case windows
- Stone surrounds
- Timber door frames
- Brick reveals
- Period & listed homes
- Tenement windows
Signs you need sand mastic in Branstone
Paint, silicone or cement used over old mastic causes problems. They do not move with the timber, and they generally need raking out.
The problems people normally mention when they call are:
- Mastic round period door frames that has failed
- Old cement repairs round a window that have failed
- Crumbling sand mastic round a window
- Gaps where the frame meets the masonry
Letting a property close to Shanklin station? Then older sash windows in a rental need their mastic kept sound to keep the weather out.
Before you book anyone
- What insurance they hold
- Who does the work, and how experienced they are
- How the surfaces are prepared before sealing
- Which colour the sealant will be
Why it’s worth doing now in Branstone
If you are redecorating, renew the mastic first. Painting over failed mastic doesn’t seal it and traditional guidance is to leave the new mastic unpainted. In a small place like Branstone, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
A failed joint rarely gets cheaper to fix by waiting. If you’re not sure whether it needs doing, ring 0345 464 0079 or email us and we will give you an honest view and a quote.
Why Branstone customers choose us
- Rated 4.9 stars on Google
- Full insurance on every job
- Trusted Arbo and Everbuild sealants
- More than 20 years in sealant work
Take a look at how sealant jobs are priced and customer reviews.
Quotes for sand mastic in Branstone
Jobs vary more than people expect. The main factors:
- How many areas need sealing
- Whether there’s mould to deal with
- Whether old sealant or filler has to be cut out
- Access and height
Homes and businesses are quoted the same way: the amount of work, the access and the products needed, plus any working-time requirements on site. Call for a quick quote and we will go through it with you.
Helping us quote
There’s no need for technical detail. Just tell us:
- The address or postcode of the job
- What the problem is, such as mould, gaps, leaks or cracking
- The rough size of the job
- A few pictures by email, if you can
If you are in Branstone and need sand mastic, phone 0345 464 0079 or send us an email. Tell us what the problem is and where, and we’ll agree the price before any work begins.
Keeping the joints in good condition
Simple care keeps the joints in good condition. Our advice:
- Check with your local planning authority if your home is listed
- Ask us before painting near the mastic
- Don’t run silicone over sand mastic
- Make sure water runs off the sill
Make sure water drains away from the window surround. Water sitting against the mastic shortens its life.
Crumbling mastic lets rain into the joint. That water can reach the timber frame and the wall so early renewal protects both.
Frames and glazing around Branstone
Branstone is within about 3 miles of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. Both are hard on the mastic around older windows and doors, which can dry out and crack sooner where a building faces the weather. Historic houses like Haseley Manor (about 1.2 miles north-west) are a reminder that the area around Branstone 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.
Managing a site like Newchurch Primary School? Then larger buildings have plenty of frames, and the mastic around each one ages. In the older streets around All Saints' Church, the joint between an old wall and a newer frame is generally the first place rain gets in.
Branstone is about 5 miles south-east of Newport, in the Isle of Wight. Homes, rented property, offices and hotels in Branstone can book us for sand mastic. Every job comes with our one-year guarantee. We cover 125 towns and villages across the Isle of Wight, from the larger towns to small villages. For nearby work, see our Portsmouth page, about 12 miles away.
Postcode districts we cover here for sand mastic: PO36. That includes homes and businesses on Branstone Farm Lane and Stockmans Close and the roads around them. Neighbouring places we cover for sand mastic include Winford (1 mile east), Apse Heath (1 mile south-east), Princelett (1 mile south), Hale Common (1 mile west) and Newchurch (1 mile north). We also work in nearby towns such as Newport (5 miles north-west), Ryde (5 miles north-east), Cowes (8 miles north-west), Ventnor (4 miles south), East Cowes (8 miles north-west) and Oakfield (5 miles north-east). Island and remote addresses take a little more planning, so tell us where you are when you ask for a quote.
Local landmarks in Branstone
We work in homes and buildings around Sandown Bay Academy. For rail, the closest station is Shanklin station, roughly 1.9 miles south-east. Nearby you will also find Wight Aviation Museum (1.3 miles east) and Arthur Webster Memorial Hospital for Children (1.8 miles south-east). The countryside around Branstone includes Alverstone Mead and Stenbury Down.
Also near Branstone
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FAQs for Branstone
I let a flat near Shanklin station. Can you help?
Yes. We work for landlords and letting agents as well as homeowners. You can phone 0345 464 0079 or email us with the details for a clear quote.
Does living near the coast affect sand mastic in Branstone?
Coastal homes put outside sealant through more weather than inland ones, so preparation and the right sealant matter all the more. Walls facing the sea are generally the first to need attention.
Is it worth trying it myself?
Sometimes. The key is preparation: remove all the old material and work on a clean, dry joint. If it does not work out, we can redo it.
What’s sand mastic made of?
A traditional pointing material made from sand and a linseed-oil-based binder for the joint between timber frames and masonry.
Do you cover Branstone?
Yes. From our base in Crawley, we cover South East England, London and all of Scotland.
Can old silicone round a sash window be swapped for sand mastic?
Yes, it’s a common request. All the old silicone is removed first so the mastic beds in well.
Is consent needed for window work on a listed home?
Checking first is sensible. Ask your local planning authority whether consent is needed for work on a listed home or in a conservation area.
Do you remove the old sealant?
Always. Sealing over old sealant is the main reason resealing fails early, so we never do it.