Hampshire · England
Mislingford Window Mastic
Problem with your window and door frames in Mislingford? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Cracked or shrunken mastic around the frame
- Cold air getting in at the frame edge
- Water coming in at the bottom corners of a door
Window mastic in Mislingford, done properly
Homes in Mislingford have every kind of window: uPVC, aluminium, timber and composite, along with patio doors, French doors and sills. Each gets a sealant chosen for the frame and the wall it meets. If you have leaking joints at the ends of sills and water coming in at the bottom corners of a door, we can put it right, on composite doors, patio & French doors and timber windows & doors alike.
Outdoor sealant needs dry, clean surfaces, so work on frames around Mislingford is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
Each job carries a 12-month guarantee, whatever its size.
- Where
- Mislingford (PO17)
- Region
- Hampshire
- Cover
- A year, on every job
- Quote
- A clear price before work begins
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Looking after it afterwards
After the cure time, these simple habits help:
- Look round the frames every year or so
- Keep paint and stain on wooden frames in good order
- Don’t aim a pressure washer at the joints
- Keep drainage slots and sill grooves clear
Have a look at the joints once a year, ideally after winter. Small splits are simple to catch before they leak, and if anything looks wrong, just phone 0345 464 0079 or email us.
On timber windows, water behind the joint can lead to rot. Rotten timber needs a joiner, not a sealant, so it pays to reseal before that happens.
FAQs for Mislingford
Is Mislingford in your area for window mastic?
Yes. We work across London and the South East, and Mislingford is part of that. Just ring 0345 464 0079 or drop us an email with a few details of the job, and we’ll send you a clear quote.
Do you cover smaller places like Mislingford?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Can tenants book the work?
Of course. Check with your landlord; we can send the quote to them too.
Do you work on first-floor windows?
Usually, yes. We plan safe access before the job, so mention the height and anything in the way.
Can you seal the gap between the frame and the plaster indoors?
Yes, we do both. Indoors, we seal between the frame and the plaster or reveal.
Where do you work from?
Mr Mastic is based in Crawley. We cover Mislingford and the rest of Hampshire, along with the rest of our area.
When is the sealant fully cured?
It depends on the product and the temperature. We tell you how long to leave it before we go.
Can I do it myself?
That depends on the joint. High-level, external movement and fire-rated joints are professional jobs, while a short indoor joint may be within reach.
What we do, step by step
We work through the job in order: protect, prepare, seal, tidy. For most jobs that takes anything from an hour or two to a full day, depending on how many frames there are. Somewhere as small as Mislingford, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First, we go round the frames with you and agree the list.
- We remove the old mastic and clean the frame edge and wall.
- Where the gap is deep, backing rod goes in first.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- Every joint is tooled smooth and checked before we leave.
How to prepare
- Let us know about stairs, lifts or work at height
- On commercial sites, let us know about site rules
- For indoor joints, keep the area dry beforehand if you can
Ask for a quote
We do not publish a price list, because every job is different. Instead, your job gets its own clear quote. To arrange one, call 0345 464 0079 or drop us an email.
Read more
Frames and glazing around Mislingford
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you let a flat or house near Botley station, renewing tired window mastic between tenants heads off draught and damp complaints.
Mislingford is about 5 miles north of Fareham, in Hampshire. Jobs in Mislingford get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. Mislingford is one of 683 places in Hampshire where we work. There’s also a page for Portsmouth, roughly 9 miles from Mislingford.
Jobs for window mastic in PO17 is quoted and booked the same way as anywhere else. Close by, we work in Kingsmead (1 mile south), Woodend (1 mile south-east), Hill Grove (1 mile north), Shirrell Heath (1 mile west) and Swanmore (1 mile north-west). Within a short drive, we also cover Winchester (11 miles north-west), Gosport (9 miles south), Havant (9 miles south-east), Eastleigh (8 miles west), Fareham (5 miles south) and Horndean (7 miles east).
Near you in Mislingford
In Mislingford, that means homes and buildings near The Roebuck pub. For rail, the closest station is Botley station, roughly 4 miles west. A little further out are Knowle Hospital (3.6 miles south-west) and Bishop's Waltham Museum (2.7 miles north-west). Open spaces near Mislingford include St Clair's Meadow.
Surface by surface
Window sills
Stone and concrete sills have their own joints, and the joint under the frame can let rain run behind. Those are sealed with a product suited to stone or concrete.
Timber windows & doors
Older timber windows in stone or brick can suit sand mastic rather than modern sealant. We can talk through the options.
When something else is needed
We’d rather tell you now than do work that won’t last, so here’s what sealant cannot put right:
- A failed sealed unit that has misted up
- A sash or casement that won’t close properly
- Worn gaskets, brush seals or a door that has dropped
Not sure which it is? You can ring 0345 464 0079 or send us an email and we’ll tell you honestly.
Where we work in Mislingford
- Aluminium frames
- Window sills
- Timber windows & doors
- Patio & French doors
- Composite doors
- uPVC windows
For landlords and businesses
Letting agents often deal with us directly. Tell us the address, the job and how access works and we will quote.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
Why deal with it now?
Once mastic fails, rain can get between the frame and the wall. Left long enough, it can stain inside walls, spoil plaster and rot wooden frames. A reseal is a much smaller job. In a small place like Mislingford, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
The cost reflects the work involved, not a rough estimate. That is why we ask about the job first.
What you get with us
- Sanitary silicone with an anti-fungal additive in wet areas
- Tidy, careful work
- Any old sealant cut out fully, not covered over
- White, clear, grey or another colour, product permitting
See how sealant jobs are priced and our reviews.
Common problems we fix in Mislingford
Sills take more water than any other part of a window, and the ends of the sill, where it meets the wall, are where it gets in. Failed sealant there lets rain into the wall or behind the frame.
Keep an eye out for these signs:
- Sealant in the wrong colour for the frame
- Cracked or shrunken mastic around the frame
- Untidy mastic left by window fitters
- Water coming in at the bottom corners of a door
If you look after a building such as Swanmore College of Technology, larger buildings have plenty of frames, and the mastic around each one ages.
Questions to ask before you book
- How long the guarantee is
- What insurance they hold
- Who turns up on the day
- Whether they seal over old material or remove it