Hampshire · England
Window & door mastic in Mount Pleasant, Hampshire
Problem with your window and door frames in Mount Pleasant? We cut out the old, prepare the joints and apply the right sealant, with a one-year guarantee.
- Gaps where the sill meets the wall
- Draughts coming in around windows and doors
- Rain getting in at the frame or under the sill
Can I do it myself?
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
Window mastic for homes and businesses in Mount Pleasant
Some gaps around frames are far deeper than they look. Packing it solid with sealant gives a joint that cannot flex, so deep gaps get backing rod first. The sealant then grips the two sides it should. We work on composite doors, uPVC windows and patio & French doors, and people most often call us about cracked internal joints between frame and plaster and leaking joints at the ends of sills.
Around Mount Pleasant, many homes face open ground, so their windows and doors take the full weather. That exposure dries out and cracks the mastic around frames and sills faster.
The work is covered for a year after we finish. If anything isn’t right with it, ring 0345 464 0079 or email us.
- Where
- Mount Pleasant (SO41)
- Region
- Hampshire
- Guarantee
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
When to call us in Mount Pleasant
Older frames were often sealed with products that set hard. Once it has hardened, the frame’s movement tears it from the wall, leaving a hairline gap down one side.
These are the problems we are asked about most:
- Cold air getting in at the frame edge
- Hard, cracked sealant around windows
- Old mastic that has gone black or come away
- Cracked internal joints between frame and plaster
If you let a flat or house near Sway station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Before you book anyone
- How long the guarantee is
- Whether you can choose the colour
- What insurance they hold
- Whether the sealant suits the joint
What happens if it’s left?
A quick bead over the top of old mastic looks like an easy fix, but it won’t grip old, dirty sealant. It soon lifts and the leak carries on behind it. Proper resealing starts with removing the old joint. Older cottages and farmhouses around Mount Pleasant can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
Combining jobs into one visit is usually more efficient than separate visits, so it’s worth mentioning everything you’d like done. We’ll give you a clear price for the lot.
What you get with us
- 20+ years of sealant experience
- One-year guarantee on every job
- Anti-fungal silicone where joints get wet
- Quality sealants from Arbo and Everbuild
Take a look at how sealant jobs are priced and what customers say.
Frames and glazing around Mount Pleasant
Mount Pleasant 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 window and door frames, which can dry out and crack sooner where a building faces the weather. Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Managing a site like Priestlands School? Then the mastic around its windows and doors needs looking after like any other building’s.
Mount Pleasant is about 2 miles north-west of Lymington, in Hampshire. We carry out window mastic for homes and businesses in Mount Pleasant. Our area takes in 683 places across Hampshire, from the larger towns to small villages. Our Southampton page covers work nearby.
We cover every part of SO41 for window mastic. Whether your property is on Mount Pleasant Lane and Kings Hyde or anywhere close by, we can help. If you’re just outside Mount Pleasant, we cover Battramsley (1 mile north-east), Boldre (1 mile east), Sandy Down (1 mile north-east), Warborne (2 miles east) and Lymington (2 miles south-east). Larger places within reach include Totton (10 miles north), Hedge End (15 miles north-east), Romsey (15 miles north), Hythe (10 miles north-east), New Milton (4 miles south-west) and Ringwood (10 miles north-west).
Local landmarks in Mount Pleasant
Locally, jobs take us to homes and businesses close to The Hobler Public House, among other places. The nearest railway station is Sway station, about 1.6 miles west of the centre. A little further out are St Barbe Museum and Art Gallery (1.9 miles south-east) and Lymington New Forest Hospital (1.4 miles south-east). Open spaces near Mount Pleasant include Milford on Sea LNR.
Also near Mount Pleasant
Other services in Mount Pleasant
FAQs for Mount Pleasant
Does the coastal weather in Mount Pleasant affect outside sealant?
Coastal weather is harder on outside sealant: there’s more wind-driven rain and, closer to the shore, salt in the air. Choosing the right sealant for the frame and wall, laid at the right depth, helps it last.
Will you come out to Mount Pleasant?
Yes, Mount Pleasant is covered. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
What does window mastic cost?
We don’t publish prices, because the cost depends on the job: its size, the old material, access and the product needed. We agree the price before any work begins.
Can you seal the gap between the frame and the plaster indoors?
Yes. Plenty of draughts come through the inside joint as well as the outside, so it can be worth sealing both.
What do you put in the joint?
We choose the sealant for the joint, not the other way round. Where it moves, gets wet or faces the weather makes a difference, and we’ll tell you what we are using.
Will resealing my frames help with draughts?
Often, yes. The gap between frame and wall is a common source of draughts, and resealing inside and out closes it.
Is there any odour?
Sometimes, a little. It fades as the sealant cures, and ventilation helps.
Do you take out the old sealant first?
Yes, always, and completely. New silicone doesn’t stick to old silicone, so any old material comes out before anything new goes in.
When it isn’t the sealant
We will always be straight with you, so here’s what new sealant will not do:
- Worn gaskets, brush seals or a door that has dropped
- Condensation trapped between the panes
- A frame that has rotted at the joint
If in doubt, call 0345 464 0079 or drop us an email and we will say what we think before booking.
Where we work in Mount Pleasant
- Timber windows & doors
- uPVC windows
- Window sills
- Composite doors
- Patio & French doors
- Aluminium frames
Work for landlords, hotels and businesses
If you manage several properties in or around Mount Pleasant, jobs at different addresses can go on one quote. Just tell us the addresses and what each one needs.
Landlords and agents in Mount Pleasant can book us as well as homeowners. Resealing between tenancies is a simple way to keep a property in good order.
What we do, step by step
We keep the work tidy and contained to the joints we are treating, so you can carry on as normal. The job usually takes a few hours for a few frames, or a day or more for a whole house, and we explain the cure time before we leave. In a small place like Mount Pleasant, access is normally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- First, we confirm safe access to each frame.
- Old, cracked mastic is removed completely.
- Frame and wall are cleaned and must be dry before sealing, and primed where the sealant calls for it.
- Backing rod fills deep voids and the sealant goes in on top.
- The joint is shaped to shed water and the area tidied.
How to prepare
- Mention any sign-in or site rules at work premises
- Clear items away from the joints we are working on
- Mention any leaks or damp you’ve noticed
Get a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we will explain what’s involved.
Read more
Aftercare tips
Once the sealant has cured, a few habits help it last:
- Look round the frames every year or so
- Use gentle cleaners on frames and sealant
- Paint up to the joint, not over it
- Don’t use solvent cleaners on the joint
Keep sill grooves and drainage slots clear, so water can run away instead of sitting against the joint.
A small gap around a frame only grows. As old mastic keeps shrinking, the gap widens, and a cold room gets colder. A new joint closes it up.