Hampshire · England
Window & door mastic in Exton, Hampshire
Our applicators work in Exton on mastic around window and door frames, sills and patio doors. Old sealant removed completely, joints prepared properly and every job guaranteed for a year.
- Hard, cracked sealant around windows
- Cold air getting in at the frame edge
- Rushed sealant from a window installation
About our window mastic in Exton
Some gaps around frames are far deeper than they look. Packing it solid with sealant gives a joint that can’t flex, so we fit backing rod to set the right depth. The sealant then grips the two sides it should. If you have draughty joints inside around the window and cold air getting in at the frame edge, we can help, on composite doors, window sills and uPVC windows alike.
Outdoor sealant needs dry, clean surfaces, so work on frames around Exton is planned for dry weather. Tell us about access to every side of the house, including upper-floor windows.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Location
- Exton (SO32)
- Region
- Hampshire
- Guarantee
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Your questions about window mastic in Exton
Will you come out to Exton?
Yes, Exton is covered. We work across London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Can you do window mastic in Exton?
Yes, Exton is within the area we cover. We work across London and the South East. You can call 0345 464 0079 or send us an email and tell us what needs doing.
Where do you work from?
We are based in Crawley, and we work across South East England, London and Scotland.
Are you insured?
Yes, we are fully insured for every job we do.
Do you guarantee window mastic?
Yes. Each job is covered for 12 months.
I’m a tenant. Can you help?
We are happy to deal with the tenant, landlord or agent. Just make sure your landlord agrees.
Can you do the inside joint as well?
Yes, we do both. Inside, the joint between frame and plaster is sealed neatly.
Can I paint over the new sealant?
Not generally, if it’s silicone. Tell us your decorating plans and we will pick a sealant to suit.
What affects the cost of window mastic
There’s no set price list. The quote depends on:
- How many areas need sealing
- The amount of work
- Any mould that needs treating
- Which sealant suits the joint
A few things move the cost up or down: the old material and how easily it comes out, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
What we need to know
Before you ask for a quote, have a think about:
- How many joints, rooms or windows are involved
- Where the property is
- The type of property
- A few pictures by email, if you can
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we will talk you through what we’d do. Whenever you’re ready, ring 0345 464 0079 or send us an email.
What window mastic looks like in Exton
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. With historic houses such as Hinton Ampner House (about 4.2 miles north) nearby, there’s older building stock in the area around Exton as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
For an older house near a landmark such as Church of St Peter and St Paul, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. If you look after a building such as Meonstoke Church of England Infant School, the mastic around its windows and doors needs looking after like any other building’s.
Exton is about 7 miles north-west of Horndean, in Hampshire. From the centre of Exton to the outskirts, window mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Exton is one of 683 places in Hampshire where we work. We also work in Southampton, about 12 miles from Exton.
All of SO32 is within our area for window mastic. Whether your property is on Shoe Lane, Church Lane and Beacon Hill Lane or anywhere close by, our applicators can take on the job. We also cover the places around Exton: Corhampton (1 mile south), Meonstoke (1 mile south), Brockbridge (1 mile south), Droxford (2 miles south) and Soberton (3 miles south). We also work in nearby towns such as Winchester (10 miles north-west), Gosport (12 miles south), Havant (10 miles south-east), Eastleigh (10 miles west), Fareham (10 miles south) and Horndean (7 miles south-east).
What’s near Exton
Typical jobs here are in homes near The Shoe Inn and the streets around them. For a walk, there’s St Clair's Meadow and Beacon Hill.
Why deal with it now?
Working on frames from a ladder with a sealant gun isn’t easy, especially on upper floors. We cut out properly, back deep gaps and tool every joint neatly, in a sealant suited to the wall. In a small place like Exton, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
Combining jobs into one visit is generally more efficient than separate visits, so it’s worth mentioning everything you’d like done. You will get one clear quote for the whole job.
Why choose Mr Mastic in Exton
- Quality sealants from Arbo and Everbuild
- ARBOMaster approved applicator
- Over 20 years’ experience
- 4.9 on Google from 180+ five-star reviews
Take a look at how sealant jobs are priced or our reviews.
What sealant work can’t fix
We’d rather tell you now than do work that will not last, so these are the limits:
- Damp coming through the wall itself rather than the frame joint
- A frame that has rotted at the joint
- A sash or casement that will not close properly
Not sure which it is? You can call 0345 464 0079 or drop us an email and we’ll tell you honestly before you book.
Where we work in Exton
- Aluminium frames
- Composite doors
- uPVC windows
- Patio & French doors
- Timber windows & doors
- Window sills
Aftercare tips
No joint lasts for ever, but care makes a real difference. A few tips:
- Don’t use solvent cleaners on the joint
- Air rooms to keep condensation down around windows
- Clear any debris from frame drain holes
- Look round the frames every year or so
A yearly look round the frames is enough. Small splits are simple to catch before they leak.
On timber windows, water behind the joint can lead to rot. Once wood has rotted, it needs repair before it can be sealed, so it pays to reseal before that happens.
What else we do in Exton
What the job involves on each surface
Patio & French doors
Water at the foot of a door frame is not always the mastic: worn seals, blocked drainage slots or a poor threshold detail can be the cause. We check before we reseal.
Composite doors
Composite doors are normally hung in an uPVC-type frame, so its perimeter joint is sealed much like a window. The bead is colour-matched to the frame.
How it works
Before we leave, we go over the finished joints with you and tell you how long to leave it. The visit itself generally takes anything from an hour or two to a full day, depending on how many frames there are, depending on the size of the job. Somewhere as small as Exton, 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.
- The old mastic is cut out and scraped back to clean surfaces.
- Where the gap is deep, backing rod goes in first.
- A flexible exterior sealant is applied in a colour to suit the frame.
- Every joint is tooled smooth and checked before we leave.
Before we arrive
- Try not to wet indoor joints just before the visit
- Let us know about parking restrictions
- Move anything stored near the joints
Get a quote
Every job is quoted individually. Just ring 0345 464 0079 or drop us an email with the details and send pictures if you have them.
Related advice
Should I try it myself first?
A careful DIYer can reseal a simple joint, 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.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.