Isle of Wight · England
Sand Mastic in Alverstone
Problem with your window and door surrounds in Alverstone? We cut out the old, prepare the joints and apply the right sealant.
- Open joints round the window box
- Old sand mastic that has cracked, crumbled or fallen out
- A silicone bead on a sash window that spoils the look
Sand mastic in Alverstone, done properly
Silicone on a period window often looks wrong and isn’t always the right material. Sand mastic is the traditional choice and we can swap the silicone for it. We work on tenement windows, period & listed homes and stone surrounds, and common reasons people get in touch are draughty sash windows at the surround and mastic worn away on windows facing the weather.
Homes in small places like Alverstone often stand in the open, with little to shelter their windows from wind and rain. Exposed frames and sills lose their mastic sooner than sheltered ones.
You are covered for a year from the day we finish. If anything is not right with it, phone 0345 464 0079 or send us an email.
- Location
- Alverstone (PO36)
- Wider area
- Isle of Wight
- Cover
- 12 months on all our work
- Price
- A clear price before work begins
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Why it’s worth doing now in Alverstone
Gaps round a sash window let in rain and draughts. Water can get to the frame and the masonry so renewing it early protects the window. In a small place like Alverstone, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
Commercial jobs are quoted on the same basis as homes: the amount of work, how we reach it and what it needs, plus any working-time requirements on site. Ask us for a quote and we will explain what it covers.
Why choose Mr Mastic in Alverstone
- Old sealant always removed completely
- A 12-month guarantee on all work
- Over 20 years’ experience
- 4.9 on Google from 180+ five-star reviews
See how sealant jobs are priced and our reviews.
Nearby places to Alverstone
Also in Alverstone
Quotes for sand mastic in Alverstone
Your quote is based on your job. We look at:
- When we can work, for business premises
- Access and height
- Which sealant suits the joint
- Whether there’s mould to deal with
What it costs depends on the amount of work, how much old material has to come out and access to the work. You’ll have a clear quote before any work starts.
What to tell us for a quote
Photos by email are helpful but not essential. Try to tell us:
- The address or postcode of the job
- Any previous sealing or DIY work
- What the problem is, such as mould, gaps, leaks or cracking
- A few pictures by email, if you can
Asking for a quote is easy: tell us what needs doing and where and its rough size. A few photos by email make the job easier to understand.
Common questions in Alverstone
Will you come out to Alverstone?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Is sand mastic in a coastal place like Alverstone any different?
Near the sea, outside joints face more wind, rain and salt than they would inland, so the choice of sealant and the preparation matter even more. Walls facing the sea are usually the first to need attention.
What guarantee comes with the work?
Our 12-month guarantee applies to all our work.
What’s sand mastic made of?
It’s sand mixed with a linseed-oil-based binder for the joint between timber frames and masonry.
Can you match the sealant colour?
Yes. White, clear and grey are common, and other colours are available for many products, and we’ll agree it with you first.
Can you quote for more than one area?
Yes, and it often makes sense. Combining jobs makes good use of the visit, so mention them when you ask for a quote.
Do you hold any approvals?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
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 for work to your windows.
DIY versus a professional finish
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.
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
Sand mastic in Alverstone: local notes
Alverstone is within about 2 miles of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That is hard on the mastic around older windows and doors, especially on the side facing the sea. Historic houses like Haseley Manor (about 1.8 miles west) are a reminder that the area around Alverstone has older buildings as well as new. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
If you look after a building such as Newchurch Primary School, the mastic around its windows and doors needs looking after like any other building’s. In the older streets around All Saints' Church, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. For landlords with property near Sandown station, cracked sand mastic around sash windows lets in the draughts tenants complain about.
Alverstone is about 4 miles south of Ryde, in the Isle of Wight. Anywhere in PO36, we can carry out sand mastic at your property. Our area takes in 125 places across the Isle of Wight, from the larger towns to small villages. Portsmouth is on our list too, about 11 miles from Alverstone.
All of PO36 is covered for sand mastic, from the main roads to the quietest streets. If you’re just outside Alverstone, we cover Alverstone Garden Village (1 mile north-west), Queen's Bower (1 mile south-west), Skinner's Hill (1 mile west), Adgestone (1 mile north-east) and Lake (1 mile south-east). We also work in nearby towns such as Newport (5 miles north-west), Ryde (4 miles north), Cowes (8 miles north-west), Ventnor (5 miles south), East Cowes (8 miles north-west) and Oakfield (4 miles north). If you’re somewhere remote, the job takes a little more planning, so let us know when you get in touch.
Landmarks near Alverstone
In Alverstone, that means homes and buildings near Sandown Bay Academy, The Bay Church of England School and The Pointer Inn, among other places. For rail, the closest station is Sandown station, roughly 1.1 miles south-east. Nearby you’ll also find Arthur Webster Memorial Hospital for Children (2 miles south) and Wight Aviation Museum (0.7 miles south). Open spaces near Alverstone include Brading Down and Alverstone Mead.
What the job involves on each surface
Tenement and terrace windows
Where a building is shared, window work may involve neighbours so it’s worth checking responsibilities.
Period and listed homes
Materials matter on listed and conservation-area homes. Sand mastic is often the preferred finish.
How the visit works
The work is kept neat and contained to the joints we are treating, so you can get on with your day. Expect the work to take a few hours for a single window, longer for several. Somewhere like Alverstone 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.
- We check each window surround and the condition of the joint.
- We rake out the old mastic and clean the joint.
- We fill deep gaps so the new mastic isn’t too thick.
- We point the joint with sand mastic by hand.
- We finish the mastic to a tidy line.
How to prepare
- Mention any parking rules near the property
- Keep pets and children clear of the area while we work
- Let us know about earlier repairs to the joints
Getting a quote
There’s no standard price list, because every job is different. Instead, we send you a clear quote for your job. To arrange one, phone 0345 464 0079 or drop us an email.
Read more
When something else is needed
Sealant isn’t the answer to every problem, and we’d rather say so up front. It will not solve:
- Decisions on consent for listed homes
- Damaged stone surrounds
- Rotten sashes, sills or window boxes (a joiner’s job)
If you are not sure, just call 0345 464 0079 or email us and we’ll give you a straight answer before you book.
Surfaces we seal
- Timber door frames
- Brick reveals
- Stone surrounds
- Tenement windows
- Sash and case windows
- Period & listed homes
Looking after it afterwards
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Take care around the mastic when scraping paint
- Clear gutters so water does not pour onto the windows
- Keep modern sealant off the mastic
- Do not paint over the new mastic
When preparing windows for paint, take care around the mastic. It can be damaged by heavy scraping.
Crumbling mastic lets rain into the joint. It can soak into the frame and the surrounding masonry so early renewal protects both.