Isle of Wight · England
Sand mastic for sash & case windows in Colwell, Isle of Wight
Window and door surrounds in Colwell need attention? We cut out the old, prepare the joints and apply the right sealant, with a 12-month guarantee.
- Mastic dropping out of the joint
- Wind and rain getting in round a sash window
- Failed mastic on an exposed elevation
When something else is needed
We will not take on work that won’t last, so here’s what sealant cannot put right:
- Planning or listed building consent (your local planning authority decides)
- Rotten sashes, sills or window boxes (a joiner’s job)
- Crumbling stone or brickwork round the window
If in doubt, call 0345 464 0079 or email us and we will say what we think.
Where we work in Colwell
- Period & listed homes
- Stone surrounds
- Timber door frames
- Brick reveals
- Sash and case windows
- Tenement windows
About our sand mastic in Colwell
Across Colwell, we renew sand mastic around sash and case windows. Each joint is raked out, prepared and pointed by hand for a neat, traditional finish. Typical jobs include a silicone bead on a sash window that spoils the look and gaps round a timber door in stone or brick, across brick reveals, period & listed homes and sash and case windows.
Somewhere as small as Colwell, older homes often have timber frames set in stone or brickwork. Older buildings like these do not always suit modern silicone, and sometimes a traditional sand mastic is the better choice.
All of our work is guaranteed for twelve months.
- Where
- Colwell (PO40, PO39)
- Wider area
- Isle of Wight
- Cover
- One year on every job
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Windows and doors in Colwell
Colwell is within about 1 mile of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That’s hard on the mastic around older windows and doors, especially on the side facing the sea. 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 site and facilities teams at buildings such as All Saints Church of England Primary School, its window and door frames need their mastic kept sound, just like a home’s. If you live in an older home near Christ Church, the joint between an old wall and a newer frame is normally the first place rain gets in. Letting a property close to Lymington Pier station? Then older sash windows in a rental need their mastic kept sound to keep the weather out.
Colwell is about 5 miles south of Lymington, in the Isle of Wight. Homes, rented property, offices and hotels in Colwell is covered for sand mastic, old or new, large or small. The work is guaranteed for a year. Our area takes in 125 places across the Isle of Wight, large and small. You can also see our page for Southampton, about 17 miles away.
Jobs for sand mastic in PO40 and PO39 is quoted and booked the same way as anywhere else. That includes homes and businesses on Colwell Chine Road, Heath Lane and Chine Close. Neighbouring places we cover for sand mastic include Totland (1 mile south-west), Freshwater (1 mile south-east), Norton Green (1 mile north-east), Easton (1 mile south-east) and Afton (1 mile south-east). We also work in nearby towns such as Newport (10 miles east), Cowes (11 miles north-east), East Cowes (12 miles north-east), Barton (11 miles east), Hunny Hill (10 miles east) and Cross Lane (11 miles east). Island and remote addresses take a little more planning, so please mention your location when you call 0345 464 0079 or email us.
What’s near Colwell
In Colwell, that means homes and buildings near Colwell Bay Inn, among other places. For rail, the closest station is Lymington Pier station, about 4.9 miles north of the centre. A little further out are Lymington New Forest Hospital (5.7 miles north) and Ferguson Family Museum (1.1 miles east). Green spaces nearby include Tennyson Down and Lymington and Keyhaven Marshes Nature Reserve.
Looking after it afterwards
So the new joints stay in good condition:
- Find out about consent before window work on a listed home
- Keep modern sealant off the mastic
- Get any rot dealt with first
- Take care around the mastic when scraping paint
Check the mastic when you check the paintwork. Catching cracks early keeps repairs small.
Once mastic starts to crumble, rain gets in. It can soak into the frame and the surrounding masonry so early renewal protects both.
Leave it or put it right?
Draughts round a sash window are not always the sashes. Open mastic joints round the box can let air in, and renewing the mastic closes them. Around Colwell, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
The cost reflects the work involved, not guesswork. That is why we ask about the job first.
What you get with us
- We never seal over old sealant
- Over 20 years’ experience
- Rated 4.9 stars on Google
- ARBOMaster approved applicator
What happens on the day
You don’t need to clear the whole room or building before we come, only the area right around the joints. Everything nearby is protected, and the job takes a few hours for a single window, longer for several for a typical job. Somewhere like Colwell 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 start by checking each surround and agreeing the joints to renew.
- Old, loose mastic is raked out and the joint cleaned.
- Deep voids are packed so the mastic is the right thickness.
- The mastic is mixed, pressed into the joint by hand and shaped.
- We dress the surface so it sits neatly against the masonry.
Getting ready for the visit
- Mention any leaks or damp you’ve noticed
- Let us know about stairs, lifts or work at height
- Let us know about earlier repairs to the joints
Ask for a quote
For a quote, ring 0345 464 0079 or send us an email with the location and a short description of the problem. We’ll send you a clear quote before any work starts.
Advice
Landlords, agents and businesses in Colwell
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. We can quote for more than one property at once.
DIY sealant or a professional job?
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
If you’re set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
Also near Colwell
More services for Colwell
Surface by surface
Sash and case windows
Sash windows are where we do most sand mastic work. Each joint round the box is raked out and renewed.
Stone surrounds
Old stone surrounds are often uneven, so the gap is not the same all the way round. We shape it by hand to follow the stone.
Colwell questions
Is sand mastic in a coastal place like Colwell any different?
Coastal homes put outside sealant through more weather than inland ones, so the choice of sealant and the preparation matter even more. Walls facing the sea are generally the first to need attention.
Do you cover smaller places like Colwell?
Yes, Colwell is covered. We work across London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Can I add another job to the visit?
Yes. Just list everything you need and you’ll get one quote.
Will you leave a mess?
No. We work neatly, protect the area around the joints and tidy up afterwards.
Which products do you use?
Each joint gets the product that suits it. Movement, water and weather all affect the choice, and we’ll tell you what we are using.
Should I use sand mastic or silicone?
For period timber windows in stone or brick, sand mastic is often the better fit. On modern frames, we’d normally use a flexible sealant, and we will explain why.
Can I do it myself?
You can, for simple jobs. Preparation is everything: all the old sealant out, and a clean, dry joint. If it doesn’t work out, we can redo it.
Is it OK to seal over old sealant?
No, because it fails. We remove every bit of old sealant first, so the new sealant bonds properly.