Hampshire · England
Window & door mastic in Swanwick, Hampshire
Mastic around window and door frames, sills and patio doors for Swanwick, backed by a one-year guarantee. Ask us for a quote.
- Rain getting in at the frame or under the sill
- Cracked sealant at the sill ends
- Black, perished sealant on frames
How the job changes by surface
Window sills
The end joints of a sill tend to fail before the rest. A tight seal at each end keeps rain out of the wall.
Aluminium frames
Aluminium moves with heat, and the frames are often slimmer than uPVC. A neat, narrow bead in a colour to match keeps the clean look.
About our window mastic in Swanwick
Mr Mastic’s applicators have more than 20 years’ experience with window and door sealants. We’re fully insured ARBOMaster approved applicators, and every job is covered by a 12-month guarantee. Common call-outs are for old mastic that has gone black or come away and hard, cracked sealant around windows, across window sills, composite doors and aluminium frames.
Somewhere as small as Swanwick, older homes often have timber frames set in stone or brickwork. Older buildings like these don’t always suit modern silicone, so the sealant has to be chosen to suit the building.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we will sort it.
- Where
- Swanwick (SO31, PO15)
- Wider area
- Hampshire
- Guarantee
- A year, on every job
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
What affects the cost of window mastic
Every job gets its own quote. This is what makes a difference:
- Any mould that needs treating
- The product the joint needs
- When we can work, for business premises
- How much there is to do
What you pay reflects the work, not a rough estimate. That’s why we ask about the job first and agree the price before starting.
What to tell us for a quote
Photos by email are helpful but not essential. Please mention:
- Whether it’s a home or a business
- What’s wrong with the joints now
- Where the job is, and your postcode
- Any access issues, like height or stairs
Getting a quote is simple: let us know the job and the location and its rough size. Photos by email help us understand the job, and we will take it from there.
Questions from Swanwick
Do you cover smaller places like Swanwick?
Yes, Swanwick is covered. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Can you help a landlord with a rental near Bursledon station?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. Just ring 0345 464 0079 or drop us an email with the address and what needs doing, and we’ll send you a clear quote.
Should I try DIY first?
That depends on the joint. High-level, external movement and fire-rated joints are professional jobs.
Can you do several jobs on one visit?
Yes, and it often makes sense. Doing several areas at once is generally more efficient, so mention them when you ask for a quote.
What information do you need?
Let us know what needs doing and where. If we need more, we’ll ask.
How long will my window job take?
Allow a few hours for a few frames, or a day or more for a whole house. Access and the amount of old mastic make the biggest difference.
Do you do commercial work?
Yes. We work in offices, washrooms, hotels and other commercial premises. We can talk about working times when we quote.
Does the work come with a guarantee?
Yes. Our one-year guarantee covers every job.
Leave it or put it right?
Resealing frames is a short job: it takes anything from an hour or two to a full day, depending on how many frames there are. Leave it until water is coming in and you may need plastering and decorating as well. Around Swanwick, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
Rather than a set price list, we look at what your job involves: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
What you get with us
- 12-month guarantee on every job
- Neat joints and a tidy finish
- Domestic, commercial and hotel work
- Rated 4.9 stars on Google
Take a look at how sealant jobs are priced or our reviews.
DIY sealant or a professional job?
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
What we can’t put right
New sealant can’t fix everything, and we’d rather say so up front. Sealant won’t put right:
- Damp problems in the wall away from the window
- Rotten timber, which needs a joiner first
- A failed sealed unit that has misted up
If in doubt, ring 0345 464 0079 or email us and we will say what we think.
Surfaces we seal
- Composite doors
- Aluminium frames
- Patio & French doors
- Window sills
- uPVC windows
- Timber windows & doors
How it works
Before we leave, we go over the finished joints with you and explain the cure time. The work normally takes a few hours for a few frames, or a day or more for a whole house, depending on the size of the job. For a village or hamlet like Swanwick, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- We start by checking each window and door with you.
- Next the failed sealant is cut away and the joint cleaned.
- Deep gaps are filled with backing rod to set the depth.
- A flexible, weatherproof sealant is applied in a colour to suit the frame.
- Finally we tidy up and check each joint.
Before we arrive
- Tell us about access, such as stairs, a lift or high-level joints
- Let us know about earlier repairs to the joints
- Move anything stored near the joints
Ask for a quote
To get a quote, phone 0345 464 0079 or email us and tell us where the job is and what the problem looks like. You will have a clear quote before we start.
Related advice
Window mastic in Swanwick: local notes
Swanwick is within about 3 miles of 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 window and door frames, which can dry out and crack sooner where a building faces the weather. Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Schools such as Sarisbury Church of England Junior School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s. For an older house near a landmark such as Church of St Paul, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. Rented homes near Bursledon station change hands often, and cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Swanwick is about 2 miles south of Hedge End, in Hampshire. Homes, rented property, offices and hotels in Swanwick can book us for window mastic. The work is guaranteed for a year. Our area takes in 683 places across Hampshire.
We cover every part of SO31 and PO15 for window mastic. You’ll find streets such as Walpole Lane, Ashby Mews and Swanwick Lane. Other places close to Swanwick include Lower Swanwick (1 mile north-west), Sarisbury (1 mile south-east), Park Gate (1 mile south-east), Burridge (1 mile north-east) and Sarisbury Green (1 mile south). We also work in nearby towns such as Winchester (12 miles north), Gosport (8 miles south-east), Havant (13 miles east), Eastleigh (6 miles north-west), Fareham (4 miles south-east) and Horndean (12 miles east).
What’s near Swanwick
Typical jobs here are in homes near The Old Ship Inn and Brookfield Community School and Language College, among other places. For rail, the closest station is Bursledon station, roughly 0.8 miles west of the centre. A little further out are Bursledon Brickworks Industrial Museum (under half a mile north) and St Andrew's Castle (2.4 miles south-west). Open spaces near Swanwick include Swanwick Lakes.
Landlords, agents and businesses in Swanwick
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. Several properties can be quoted together.
From a single let to a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.