Hampshire · England
Old Netley Window Mastic
Mastic around window and door frames, sills and patio doors for homeowners, landlords and businesses in Old Netley. Fully insured, ARBOMaster approved and guaranteed for a year.
- Rain getting in at the frame or under the sill
- White mastic on grey or black frames
- Gaps between the frame and the inside reveal
Window mastic for homes and businesses in Old Netley
Around Old Netley we seal all kinds of frames: from uPVC casements to timber and aluminium, plus patio doors, French doors and sills. The sealant is chosen to suit the frame material and the wall. We’re often asked to deal with mastic that’s falling out in pieces and gaps where the sill meets the wall, on uPVC windows, patio & French doors and composite doors.
Mastic can only go onto a dry, clean joint, so window work in Old Netley is booked around the forecast. Let us know about access to all the frames, upstairs ones included.
The work is covered for a year after we finish. If anything is not right with it, ring 0345 464 0079 or email us.
- Location
- Old Netley (SO31)
- Region
- Hampshire
- Guarantee
- A year, on every job
- Price
- A clear price before we start
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
When something else is needed
New sealant cannot fix everything, and we’d rather say so up front. Sealant won’t put right:
- Damp problems in the wall away from the window
- Draughts through the window seals rather than the frame
- Misting between the panes of a double-glazed unit (that needs a new unit)
If in doubt, ring 0345 464 0079 or email us and we will say what we think before booking.
Surfaces we seal
- Aluminium frames
- Timber windows & doors
- Window sills
- uPVC windows
- Composite doors
- Patio & French doors
More services for Old Netley
Questions from Old Netley
Is window mastic in a coastal place like Old Netley any different?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. The right product, a clean joint and the right depth all help it cope.
Is Old Netley within the area you cover?
Yes, we do. 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.
Will it make a mess?
No. We protect the surfaces around the joints, and we clear up the old sealant and our materials before we leave.
How long should I leave it?
That depends on the sealant used, so please follow the time we give you.
What do you need from me for a quote?
Where the job is, what the problem is and roughly how big it is. If you can, email a few pictures.
Is it OK to seal over old sealant?
No. We remove every bit of old sealant first, so the new sealant bonds properly.
Are you fully insured?
Yes. Mr Mastic is fully insured, with over 20 years’ experience in sealant work.
Can tenants book the work?
We can work for tenants, landlords or agents. Get your landlord’s agreement first.
What window mastic looks like in Old Netley
Old Netley is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That is hard on the mastic around window and door frames, especially on the side facing the sea. The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Homes close to St Paul’s Church include some older properties, and the joint between an old wall and a newer frame is usually the first place rain gets in. For landlords with property near Bursledon station, renewing tired window mastic between tenants heads off draught and damp complaints.
Old Netley is about 2 miles south-west of Hedge End, in Hampshire. Jobs in Old Netley get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Across Hampshire, we cover 683 places, and Old Netley is one of them.
Here we cover the SO31 postcode area for window mastic. Local streets include Darlee Gate, Green Lane and Cranbury Gardens, and we cover them all. Neighbouring places we cover for window mastic include Lowford (1 mile north-east), Bursledon (1 mile east), Butlocks Heath (1 mile south-west), Hound (1 mile south-west) and Netley (1 mile south-west). We also work in nearby towns such as Winchester (12 miles north), Gosport (10 miles south-east), Havant (15 miles east), Eastleigh (5 miles north), Fareham (6 miles south-east) and Horndean (14 miles east).
What’s near Old Netley
In Old Netley, that means homes and buildings near Oasis Academy Mayfield, Westwood Woodland Park and The Linden Tree pub and the streets around them. For rail, the closest station is Bursledon station, about 1 mile south-east. A little further out are Coldeast (2.3 miles south-east) and Bursledon Brickworks Industrial Museum (1.6 miles east). Not far away are Netley Common.
Work for landlords, hotels and businesses
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.
When to call us in Old Netley
Frames are never completely still. Sun on a frame makes it expand, and it contracts again overnight, while the masonry beside it stays put. If the sealant can’t stretch, it splits.
It’s worth asking for a quote if you see:
- Cracked internal joints between frame and plaster
- Mastic that has split away from the wall
- Rain getting in at the frame or under the sill
- White mastic on grey or black frames
Managing a site like Bursledon Church of England Infant School? Then its window and door frames need their mastic kept sound, just like a home’s.
Comparing quotes
- Which sealant they’ll use, and why
- What the cure time is
- Whether all the old sealant comes out first
- What guarantee comes with the work
Can I do it myself?
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
What the job involves on each surface
Aluminium frames
Coated aluminium needs a compatible sealant and we avoid acetoxy silicones, which can react with some metals. We use a neutral-cure product.
uPVC windows
Fitters’ mastic on plastic frames is sometimes thin and rushed. We cut it out, back any deep gaps and reseal properly.
How the visit works
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 work takes anything from an hour or two to a full day, depending on how many frames there are in most cases. For a village or hamlet like Old Netley, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- We check how each frame can be reached safely.
- Old, cracked mastic is removed completely.
- 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
- For business premises, tell us about site rules or sign-in
- Move anything stored near the joints
- Keep pets and children clear of the area while we work
How to get a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and add photos by email if you can.
Read more
What happens if it’s left?
Once mastic fails, rain can get between the frame and the wall. Over time that can mean damp patches, damaged plaster and rotting timber. A reseal is a much smaller job. In a small place like Old Netley, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
Instead of a standard rate, we look at what your job involves: how many joints, what’s in them now and how we reach them. You will know the price before we begin.
Why us?
- Colour agreed with you before we start
- Tidy, careful work
- Sanitary silicone with an anti-fungal additive in wet areas
- Every job guaranteed for a year
Take a look at our cost guide or our reviews.