Isle of Wight · England
Sand Mastic in Freshwater
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for householders, landlords and businesses in Freshwater. Fully insured, ARBOMaster approved and guaranteed for a year.
- Gaps round a timber door in stone or brick
- Modern sealant on a period surround
- Old cement repairs round a window that have failed
How the job changes by surface
Stone surrounds
Stone openings are rarely perfectly straight, so the gap is not the same all the way round. Sand mastic is shaped by hand to suit.
Tenement and terrace windows
Tenements and terraces often have many sash windows with ageing mastic. We work on single windows or whole elevations.
Sand mastic in Freshwater, done properly
Across Freshwater, we renew sand mastic around sash and case windows. Every joint is cleaned out and filled by hand, finished to suit the masonry. We work on tenement windows, timber door frames and period & listed homes, and the jobs we see most are a silicone bead on a sash window that spoils the look and draughty sash windows at the surround.
Houses in smaller places like Freshwater can stand more in the open than those in a built-up town. The mastic around frames on those walls tends to age faster.
A 12-month guarantee comes as standard.
- Location
- Freshwater (PO40)
- Region
- Isle of Wight
- Cover
- 12 months on all our work
- Quote
- A clear price before we start
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Frames and glazing around Freshwater
Freshwater is close to 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. The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For an older house near a landmark such as All Saints' Church, the joint between an old wall and a newer frame is normally the first place rain gets in.
Freshwater is about 5 miles south of Lymington, in the Isle of Wight. Homes, rented property, offices and hotels in Freshwater can book us for sand mastic, old or new, large or small. The work is guaranteed for a year. Our the Isle of Wight coverage runs to 125 places, and Freshwater is one of them. You can also see our page for Southampton, roughly 17 miles from Freshwater.
Here we cover the PO40 postcode area for sand mastic. If you need sand mastic at a property on Dall Square, High Street and The Square or anywhere close by, our applicators can take on the job. Close by, we work in Easton (1 mile south-east), Colwell (1 mile north-west), Norton Green (1 mile north), Afton (1 mile south-east) and Totland (1 mile west). Within a short drive, we also cover Newport (10 miles east), Cowes (11 miles north-east), Shanklin (15 miles east), Ventnor (15 miles south-east), East Cowes (12 miles north-east) and Barton (10 miles east). For island and remote addresses, the job takes a little more planning.
What’s near Freshwater
Around Freshwater, our work takes us to homes and buildings near The Red Lion pub, among other places. Nearby you’ll also find Yarmouth Castle (1.9 miles north-east) and Ferguson Family Museum (0.7 miles north-east). For a walk, there’s Lymington and Keyhaven Marshes Nature Reserve and Afton Down.
Common problems we fix in Freshwater
Over the years, sand mastic weathers. It hardens, cracks and starts to come away from the frame or the masonry.
The most common problems we see are:
- Cement or filler used on old window joints that has cracked
- Open joints round the window box
- Wind and rain getting in round a sash window
- Weathered mastic on the most exposed windows
For site and facilities teams at buildings such as All Saints Church of England Primary School, the mastic around its windows and doors needs looking after like any other building’s.
Before you book anyone
- What preparation is included
- Which sealant they’ll use, and why
- Which colour the sealant will be
- How long to leave it before use
Aftercare tips
Good habits help new joints last longer. A few tips:
- Keep sills and gutters clear so water drains away
- Ask a joiner to look at soft timber first
- Don’t paint over the new mastic
- Keep modern sealant off the mastic
Keep paint scrapers and sanders off the mastic when redecorating. Hard scraping can loosen it.
An open joint round the box lets weather through. The longer it’s left, the more the joint opens.
Freshwater: your questions answered
Will you come out to Freshwater?
Yes, Freshwater is covered. Our work covers London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Does the coastal weather in Freshwater affect outside sealant?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. Choosing the right sealant for the frame and wall, laid at the right depth, helps it last.
Do I need permission for sand mastic on a listed building?
Yes, it’s worth checking. Your local planning authority can say if consent is needed for work on a listed home or in a conservation area.
Is it OK to seal over old sealant?
No. New silicone won’t bond to old silicone, and anything trapped underneath, including mould and water, stays there. We remove it all first.
What does sand mastic cost?
Every job is different, so each one gets its own quote. For a quick quote, phone 0345 464 0079 or drop us an email with a short description of the job.
Is sand mastic better than silicone for my windows?
It depends on the window. On many period windows, sand mastic looks right and suits the building and newer frames generally get a flexible sealant.
Do I have to be there?
It depends on the job. Inside work needs someone to give us access, and for outside work we’ll agree access with you when we book.
Is the work guaranteed?
You get our one-year guarantee to all our work.
Can I do it myself?
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
Quotes for sand mastic in Freshwater
Jobs vary more than people expect. What affects the quote:
- How much old sealant there is and how hard it is to remove
- The size of the job
- Any mould that needs treating
- Working hours on commercial sites
The cost reflects the work involved, not guesswork. That is why we ask about the job first and give you a clear quote before we start.
What we need to know
There’s no need for technical detail. Just tell us:
- Pictures of the joints, sent by email
- What’s wrong with the joints now
- Any previous sealing or DIY work
- Access, such as stairs, a lift or height
Getting a quote is simple: let us know what needs doing and where. Photos by email help us understand the job.
Places near Freshwater
Also in Freshwater
How the visit works
All our tools and materials come with us in the van. Once we have agreed what’s being done, we protect the area and start. Most jobs take a few hours per window, depending on the condition of the joints. A visit to Freshwater is planned like any other: the time, the access and where to park are agreed in advance. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- We check each window surround and the condition of the joint.
- The joint is raked out and cleaned.
- We fill deep gaps so the new mastic is not too thick.
- We point the joint with sand mastic by hand.
- The finish is dressed neatly.
Preparing for the visit
- Tell us about any previous sealing or DIY attempts
- For indoor joints, keep the area dry beforehand if you can
- Clear items away from the joints we are working on
Ask for a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and add photos by email if you can.
Advice
Work for landlords, hotels and businesses
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance.
Letting agents often deal with us directly. Tell us the address, the job and how access works.