Hampshire · England
Window & door mastic in Stanmore, Hampshire
Our applicators work in Stanmore 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.
- A bead that does not match the frame
- Hard, cracked sealant around windows
- Mastic that’s falling out in pieces
Window mastic in Stanmore
Most frames have an outside joint and an inside one. The external joint is the weather seal; the internal joint closes the gap to the plaster and stops draughts. Either or both can be done. If you are dealing with rushed sealant from a window installation and mastic that’s falling out in pieces, we can put it right.
In a smaller place like Stanmore, some walls face open ground and catch the full force of the weather. That is hard on the mastic around frames and sills.
Every job is covered by a 12-month guarantee.
- Location
- Stanmore (SO22, SO23)
- Wider area
- Hampshire
- Cover
- 12 months on all our work
- Quotes
- A clear price before we start
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Why deal with it now?
Choosing the product is half the job. Interior caulk and bathroom silicone are not made for exterior frame joints. A low-modulus exterior sealant keeps its stretch through hot and cold weather. Around Stanmore, water from a failed joint in an older home can soak into timber and plaster, which is far harder to put right than the sealant itself.
We do not show prices on the website, because each job is priced on what it involves. For a quick quote, please ring 0345 464 0079 or drop us an email and we will talk you through it.
Why choose Mr Mastic in Stanmore
- Anti-fungal silicone where joints get wet
- We leave the area clean and tidy
- An ARBOMaster approved applicator
- A choice of colours where the product allows
Take a look at how sealant jobs are priced and what customers say.
Stanmore homes and the weather
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.
If you let a flat or house near Winchester station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets. In the older streets around Saint Luke, 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 Stanmore Primary School, its window and door frames need their mastic kept sound, just like a home’s.
Stanmore is about 1 mile south-west of Winchester, in Hampshire. Anywhere in SO22, we can carry out window mastic at your property. Stanmore is one of 683 towns and villages in Hampshire where we work. We also work in Southampton, around 10 miles away.
Postcode districts we cover here for window mastic: SO22 and SO23. We cover properties on Fox Lane, Kings Road and Romsey Road. Being close to the A3090, Stanmore is easy for our applicators to reach for window mastic. Other places close to Stanmore include Badger Farm (1 mile south), St Cross (1 mile south-east), Oliver's Battery (1 mile south-west), Winchester (1 mile north-east) and Weeke (1 mile north). Further out, we also cover Eastleigh (6 miles south), Fareham (15 miles south-east), Andover (13 miles north-west), Totton (12 miles south-west), Chandler's Ford (5 miles south-west) and Hedge End (10 miles south).
Near you in Stanmore
In Stanmore, that means homes and buildings near White Horse Public House, Kings' School and St. Cross Park, among other places. For rail, the closest station is Winchester station, about 1.2 miles north-east of the centre. A little further out are Winchester Castle (0.9 miles north-east) and Balfour Museum of Hampshire Red Cross History (0.5 miles north-west). For a walk, there’s Winnall Moors and Twyford Down.
How the visit works
Good joint work is mostly preparation, so that is where we spend the time. Every joint is cleaned and dried before new material goes in. All told, the work takes a morning for a couple of windows and a door. A visit to Stanmore is planned like any other: the time, the access and where to park are agreed in advance. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- First, we confirm safe access to each frame.
- All the failed sealant is cut away, along with any loose debris.
- The surfaces are cleaned and left dry, and primed where the sealant calls for it.
- Deep voids are backed, then the sealant is gunned in.
- The joint is shaped to shed water and the area tidied.
Getting ready for the visit
- Mention any parking rules near the property
- Let us know about stairs, lifts or work at height
- Where the joints are inside, avoid wetting them before we arrive
Get a quote
Getting a quote is simple: let us know what needs doing and where. Photos by email help us understand the job.
Related advice
DIY sealant or a professional job?
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.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Keeping the joints in good condition
A little care helps the new joints last. Our advice:
- Keep solvents and bleach off the sealant
- Wash the frames with mild soapy water
- Keep jet washers away from the mastic
- Check the mastic once a year
Try not to touch the new joint while it cures, for as long as we advise. Keep jet washers away from the frames.
On timber windows, water behind the joint can lead to rot. Once wood has rotted, it needs repair before it can be sealed, so early resealing is worth it.
Towns and villages near Stanmore
What else we do in Stanmore
What affects the cost of window mastic
We quote each job individually. These are the things that affect it:
- The old material and how stubborn it is
- Access and height
- Whether there’s mould to deal with
- The type of sealant required
Instead of a standard rate, we price the job in front of us: how many joints, what’s in them now and how we reach them. You will know the price before we begin.
Helping us quote
What to tell us when you ask for a quote:
- Where the job is, and your postcode
- What the problem is, such as mould, gaps, leaks or cracking
- Whether it’s a home or a business
- Photos by email, if that is easy
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we’ll talk you through what we’d do. Whenever you are ready, ring 0345 464 0079 or send us an email.
Questions from Stanmore
Can you do window mastic in Stanmore?
Yes, Stanmore is within the area we cover. Our work covers London and the South East. You can phone 0345 464 0079 or drop us an email and tell us what needs doing, and we’ll send you a clear quote.
I let a flat near Winchester station. Can you help?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. Just call 0345 464 0079 or drop us an email with the address and what needs doing, and we will give you a clear price.
What does window mastic cost?
The cost depends on the size of the job, access and how much old sealant has to come out. Ask us for a quote and we will talk you through it.
Are you ARBOMaster approved?
Yes. We hold ARBOMaster approved applicator status and we’re fully insured too.
How long before the joint can be used?
Different products cure at different speeds, so follow the cure time we give you.
Do you work for hotels and businesses?
Yes. We work in offices, washrooms, hotels and other commercial premises, as well as homes. Working times can be discussed when we quote.
Will new mastic stop draughts?
If the draught is coming in around the frame, yes. If it’s coming through the window seals, we’ll tell you.
Do you work on first-floor windows?
Yes, as long as they can be reached safely. Tell us about access when you get in touch and we will plan for it.
What we cannot put right
We won’t take on work that will not last, so these are the limits:
- Misting between the panes of a double-glazed unit (that needs a new unit)
- Draughts through the window seals rather than the frame
- Faulty window hardware
Not sure which it is? You can phone 0345 464 0079 or send us an email and we will tell you honestly.
Where we work in Stanmore
- Window sills
- Timber windows & doors
- uPVC windows
- Aluminium frames
- Composite doors
- Patio & French doors
Landlord and commercial work in Stanmore
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.
If you manage several properties in or around Stanmore, jobs at different addresses can go on one quote. Send us the addresses and the work at each.