Isle of Wight · England
Sand mastic for sash & case windows in Merstone, Isle of Wight
Sand mastic for Merstone and the surrounding area: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Mastic dropping out of the joint
- Tired mastic found when preparing windows for paint
- Weathered mastic on the most exposed windows
FAQs for Merstone
Can you do sand mastic in Merstone?
Yes. Our work covers London and the South East, and Merstone is part of that. Just call 0345 464 0079 or send us an email with a few details of the job.
I let a flat near Shanklin station. Can you help?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or send us an email and tell us about the property, and we’ll give you a clear price.
Is consent needed for window work on a listed home?
Check with your local planning authority. They’ll tell you if consent is needed for work to your windows.
What sealant do you use?
Quality sealants from brands including Arbo and Everbuild, picked for each joint. We’ll tell you what we’re using and why.
Will the old sealant be removed?
Yes. We cut out all the old sealant and clean the joint before resealing.
How do I get a quote for sand mastic in Merstone?
Size, access and the old material all affect the cost. Call for a quick quote.
Will there be a smell?
It depends on the product. Some products have a noticeable smell, others very little.
How long does sand mastic take to go off?
Not right away. It skins first and hardens fully later, and we will tell you what to expect.
Sand mastic for homes and businesses in Merstone
Burnt sand mastic is a traditional material blends with stone and brick surrounds. It suits period and listed homes, where modern sealant can look out of place. Typical jobs include old sand mastic that has cracked, crumbled or fallen out and window mastic to renew ahead of painting, across sash and case windows, period & listed homes and brick reveals.
Mastic can only go onto a dry, clean joint, so window work in Merstone is booked around the forecast. Let us know about access to all the frames, upstairs ones included.
You are covered for a year from the day we finish. If there’s a problem with it, please phone 0345 464 0079 or drop us an email.
- Place
- Merstone (PO30)
- Region
- Isle of Wight
- Guarantee
- A year, on every job
- Quotes
- A clear price before we start
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Surface by surface
Timber door frames
Period doors in stone or brick openings are often pointed with sand mastic. We renew it the same way as on windows.
Sash and case windows
Sash windows are where we do most sand mastic work. Each joint round the box is raked out and renewed.
How it works
The work is kept neat and contained to the joints we are treating, so you can get on with your day. The job usually takes anything from a few hours to a full day, depending on how many windows, and we tell you how long to leave it before we go. Somewhere like Merstone needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- We start by checking each surround and agreeing the joints to renew.
- We rake out the old mastic and clean the joint.
- Large voids are packed out first, so the mastic is not too thick.
- The mastic is mixed, pressed into the joint by hand and shaped.
- The mastic is finished to sit tidily against the stone or brick.
Before we arrive
- Try not to wet indoor joints just before the visit
- On commercial sites, let us know about site rules
- Keep children and pets away from the work area
How to get a quote
For a quote, call 0345 464 0079 or send us an email with the location and a short description of the problem. We’ll give you a clear price before any work starts.
Read more
What we are called out for in Merstone
Over the years, sand mastic weathers. It hardens, cracks and starts to come away from the frame or the masonry.
Signs it’s time to call us include:
- Silicone on a period window that looks wrong
- Old sand mastic that has cracked, crumbled or fallen out
- Gaps where the frame meets the masonry
- Tired mastic found when preparing windows for paint
For landlords with property near Shanklin station, cracked sand mastic around sash windows lets in the draughts tenants complain about.
What your quote should include
- Whether they seal over old material or remove it
- What product goes in the joint
- How the joint is cleaned and prepared
- What happens if the job turns out different
DIY sealant or a professional job?
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.
Leave it or put it right?
If you’re redecorating, renew the mastic first. Painting over failed mastic does not seal it, and the new mastic is traditionally left unpainted. Where a wall is exposed, as many are in small places like Merstone, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
No two jobs are quite the same, so we quote each one individually. Size, access and the product the joint needs all play a part.
What you get with us
- Full insurance on every job
- Experience in homes, commercial sites and hotels
- We never seal over old sealant
- Arbo and Everbuild products
See our cost guide and what customers say.
Sand mastic in Merstone: local notes
Historic houses like Arreton Manor (about 1.1 miles north) are a reminder that the area around Merstone has older buildings as well as new. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic. London and the South East are among the drier parts 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 Arreton Manor, about 1.1 miles north, show how far back building around Merstone goes.
Merstone is about 3 miles south-east of Newport, in the Isle of Wight. If you need sand mastic in Merstone, it’s easy to get a quote: please phone 0345 464 0079 or email us. We cover the Isle of Wight from our Crawley base, Merstone included. Merstone is one of 125 towns and villages in the Isle of Wight we cover for sand mastic. We also work in Portsmouth, about 13 miles from Merstone.
We cover every part of the PO30 postcode area for sand mastic. If you need sand mastic at a property on Merstone Lane, Chapel Lane and Newlands or anywhere close by, our applicators can take on the job. We also cover the places around Merstone: Arreton (1 mile north-east), Rookley (1 mile south-west), Hale Common (1 mile south-east), Rookley Green (1 mile south-west) and Blackwater (2 miles north-west). We also work in nearby towns such as Newport (3 miles north-west), Ryde (6 miles north-east), Cowes (7 miles north), Sandown (4 miles east), Shanklin (4 miles south-east) and Ventnor (5 miles south-east). If you are somewhere remote, the job takes a little more planning, so mention it when you ask for a quote.
Near you in Merstone
Merstone’s nearest station is Shanklin station, about 3.8 miles south-east. A little further out are Whitecroft Hospital (2.2 miles west) and Carisbrooke Castle (3.1 miles north-west). Open spaces near Merstone include Stenbury Down and Alverstone Mead.
For landlords and businesses
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance that we can handle for you.
If you manage several properties in or around Merstone, several properties can go on one quote. Send us the addresses and the work at each.
Also near Merstone
More services for Merstone
Honest limits
A few problems are outside what sealant work can do:
- Rotten sashes, sills or window boxes (a joiner’s job)
- Sash cords, weights and draught-proofing of the sashes
- Cracked or broken glass
If in doubt, call 0345 464 0079 or send us an email and we will say what we think before you book.
What we seal
- Period & listed homes
- Tenement windows
- Brick reveals
- Timber door frames
- Sash and case windows
- Stone surrounds