Isle of Wight · England
Window & door mastic in Merstone, Isle of Wight
Our applicators work in Merstone on mastic around window and door frames, sills and patio doors. Old material cut out, joints cleaned and sealed neatly and every job guaranteed for a year.
- Rushed sealant from a window installation
- Cracked sealant at the sill ends
- Sealant in the wrong colour for the frame
How we handle window mastic in Merstone
Around Merstone we seal all kinds of frames: from uPVC casements to timber and aluminium, plus patio doors, French doors and sills. Each gets a sealant chosen for the frame and the wall it meets. We work on timber windows & doors, uPVC windows and patio & French doors, and people most often call us about rushed sealant from a window installation and gaps where the sill meets the wall.
Homes in small places like Merstone 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.
There’s a 12-month guarantee on every job.
- Where
- Merstone (PO30)
- Region
- Isle of Wight
- Cover
- 12 months on all our work
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Work for landlords, hotels and businesses
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we’ll give you a quote.
We also work for property managers and facilities teams. We can quote a run of properties together, and we’re fully insured for the work.
How the visit works
Most of a good job is in the preparation, so that is where we spend the time. Every joint is cleaned and dried before new material goes in. All told, the work takes a morning for a couple of windows and a door. For a village or hamlet like Merstone, the journey is planned in advance: 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 how each frame can be reached safely.
- All the failed sealant is cut away, along with any loose debris.
- The surfaces are cleaned and left dry.
- Backing rod fills deep voids and the sealant goes in on top.
- We tool the joint so water runs off, then clear up.
How to prepare
- Keep children and pets away from the work area
- Mention any parking rules near the property
- Try not to wet indoor joints just before the visit
Ask for a quote
We quote each job on its own. Simply phone 0345 464 0079 or drop us an email and describe the job and send pictures if you have them.
Read more
What affects the cost of window mastic
Some jobs are bigger than they look, and some smaller. What affects the quote:
- Access and height
- The number and length of the joints
- Any working-time requirements on site
- The number of rooms or windows
Doing several joints on one visit generally makes better use of the time than several visits, so tell us about everything that needs sealing. We’ll give you a clear price for the lot.
Helping us quote
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- The address or postcode of the job
- If it’s domestic, commercial or a hotel
- Pictures of the joints, sent by email
- How many joints, rooms or windows are involved
For window mastic in Merstone, ring 0345 464 0079 or drop us an email. Tell us what the problem is and where, and you’ll get a clear quote before any work starts.
How to look after the new joints
Aftercare is simple, and it makes a real difference:
- Keep paint off silicone joints
- Avoid harsh chemicals near the mastic
- Air rooms to keep condensation down around windows
- Walk round the house once a year and look at the joints
Keep the new mastic undisturbed while it cures, following the cure time we give you. Don’t point a pressure washer at the joints.
A failed joint lets water into the wall a little at a time. Often the first sign is a damp patch inside or flaking paint on the reveal. Early resealing stops it reaching that point.
Different surfaces, different methods
uPVC windows
uPVC expands and contracts noticeably with temperature, so the joint needs a low-modulus sealant that stays flexible. White is the usual colour, with brown, anthracite grey and black for coloured frames.
Window sills
Sills catch the water running down the glass, so the sill ends and the joint under the frame are vital. Each is cleaned out and resealed.
What we cannot put right
We’d rather tell you now than do work that won’t last, so these are the limits:
- Penetrating damp from a failed cavity tray or render
- Soft or decayed wood in the frame
- Broken hinges, locks or handles
Not sure which it is? You can call 0345 464 0079 or send us an email and we’ll tell you honestly before booking.
Where we work in Merstone
- Aluminium frames
- Window sills
- Composite doors
- Patio & French doors
- uPVC windows
- Timber windows & doors
Towns and villages near Merstone
Other services in Merstone
Frames and glazing around Merstone
The South East is one of 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 like Arreton Manor (about 1.1 miles north) are a reminder that the area around Merstone has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
Rented homes near Shanklin station change hands often, and sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Merstone is about 3 miles south-east of Newport, in the Isle of Wight. From the centre of Merstone to the outskirts, window mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Merstone is one of 125 places in the Isle of Wight we cover for window mastic. There’s also a page for Portsmouth, roughly 13 miles from Merstone.
Our applicators cover all of PO30 for window mastic. That includes homes and businesses on Merstone Lane, Chapel Lane and Newlands. Nearby, we also carry out window mastic in 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). Larger places within reach include 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’re somewhere remote, the job takes a little more planning, so mention it when you ask for a quote.
Around Merstone
The nearest railway station is Shanklin station, roughly 3.8 miles south-east. A little further out are Whitecroft Hospital (2.2 miles west) and Carisbrooke Castle (3.1 miles north-west). Green spaces nearby include Stenbury Down and Alverstone Mead.
Do you need window mastic in Merstone?
Timber windows bring their own problems. Old mastic gets painted over and cracks under the paint, and the wood moves with damp as well as heat.
These are the problems we are asked about most:
- Sealant in the wrong colour for the frame
- Mastic that is falling out in pieces
- Whistling draughts around closed windows
- Gaps left after new windows were fitted
Historic houses such as Arreton Manor, about 1.1 miles north, show how far back building around Merstone goes.
What to look for in a quote
- How the surfaces are prepared before sealing
- How hidden problems are handled
- Who does the work, and how experienced they are
- What product goes in the joint
FAQs for Merstone
Can you do window mastic in Merstone?
Yes, Merstone is within the area we cover. Our work covers London and the South East. Just ring 0345 464 0079 or email us with a few details of the job.
Can you help a landlord with a rental near Shanklin station?
Yes, we work for landlords and letting agents. You can call 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before work begins.
Which products do you use?
The product depends on the job: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. We use products from Arbo and Everbuild.
Do I have to be there?
That depends on where the joints are. Inside work needs someone to give us access, while outside work can sometimes be arranged differently.
Can you seal over the old sealant?
No. Fresh sealant does not stick to old sealant, and it traps any mould or water underneath. We remove it all first.
What information do you need?
Tell us what needs doing and where, plus photos if you have them. If we need more, we’ll ask.
Will the old sealant be removed?
Always. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
Where are you based?
Our base is in Crawley, West Sussex, and we work across South East England, London and Scotland.