Hampshire · England
Window & door mastic in Charlwood, Hampshire
Mastic around window and door frames, sills and patio doors in Charlwood, with a one-year guarantee on every job. Ask us for a quote.
- Cracked sealant at the sill ends
- Mastic that is falling out in pieces
- Damp patches on the reveal after heavy rain
How we handle window mastic in Charlwood
The new joint doesn’t have to be white. White, brown, anthracite grey, black and clear sealants are all available, so the bead blends with the window rather than framing it. If you have cracked or shrunken mastic around the frame and cold air getting in at the frame edge, we can help, whatever the surface.
In a village or hamlet like Charlwood, older cottages and farmhouses often have timber windows set in stone or brick. Older buildings like these don’t always suit modern silicone, so the sealant has to be chosen to suit the building.
Big or small, you get the same 12-month guarantee in Charlwood and across Hampshire.
- Where
- Charlwood (SO24)
- Wider area
- Hampshire
- Guarantee
- 12 months on all our work
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Do you need window mastic in Charlwood?
Some failures date back to when the windows were fitted. Mastic laid onto dusty, damp or crumbling surfaces never bonded as it should, and it lets go sooner than it should.
People usually contact us after spotting something like this:
- Cracked or shrunken mastic around the frame
- Old mastic that has gone black or come away
- Draughts coming in around windows and doors
- White mastic on grey or black frames
For an older house near a landmark such as Monkwood Mission Church, the joint between an old wall and a newer frame is generally the first place rain gets in.
Before you book anyone
- What happens if the job turns out different
- What product goes in the joint
- Who turns up on the day
- Whether you can choose the colour
How we quote for window mastic
The price is agreed before any work begins. It takes into account:
- Whether there’s mould to deal with
- Access and height
- The type of sealant required
- Any working-time requirements on site
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.
Helping us quote
You don’t need to know the technical terms. It helps if you can tell us:
- Where the job is, and your postcode
- The rough size of the job
- How we’d reach the joints
- What’s wrong with the joints now
For window mastic in Charlwood, call 0345 464 0079 or drop us an email. Tell us what the problem is and where, and we will agree the price before any work begins.
Why deal with it now?
Running fresh sealant over the old joint is tempting, but it will not grip old, dirty sealant. It soon lifts and the leak carries on behind it. Proper resealing starts with removing the old joint. In a small place like Charlwood, 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 guesswork. That is why we ask a few questions first and give you a clear price before we start.
What you get with us
- Sanitary silicone with an anti-fungal additive in wet areas
- ARBOMaster approved applicator
- Old sealant always removed completely
- Colour agreed with you before we start
Take a look at our cost guide or what customers say.
When it isn’t the sealant
Before you book, it’s worth knowing the limits too:
- Draughts through the window seals rather than the frame
- Faulty window hardware
- Damp problems in the wall away from the window
If you are not sure, just call 0345 464 0079 or email us and we will give you a straight answer.
What we seal
- Window sills
- uPVC windows
- Aluminium frames
- Timber windows & doors
- Patio & French doors
- Composite doors
Frames and glazing around Charlwood
Historic houses like Bentworth Hall (about 4.8 miles north) are a reminder that the area around Charlwood has older buildings as well as new. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. 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.
Around Charlwood, as everywhere, window mastic is only as good as the preparation behind it.
Charlwood is about 6 miles south-west of Alton, in Hampshire. Homes, rented property, offices and hotels in Charlwood is covered for window mastic, old or new, large or small. The work is guaranteed for a year. Across Hampshire, we cover 683 places, and Charlwood is one of them. You can also see our page for Southampton, roughly 19 miles from Charlwood.
Every address in SO24 is within our area for window mastic, from the main roads to the quietest streets. Neighbouring places we cover for window mastic include Monkwood (1 mile south-west), Kitwood (1 mile north-west), Gilbert Street (1 mile north-west), Ropley (2 miles west) and West Tisted (2 miles south-west). Larger places within reach include Basingstoke (13 miles north), Winchester (12 miles west), Havant (15 miles south), Eastleigh (15 miles south-west), Horndean (12 miles south) and Alton (6 miles north-east).
What’s near Charlwood
Other landmarks nearby include Alton Community Hospital (4.7 miles north-east). Not far away are Red Hill and Shutts Copse.
What happens on the day
We bring everything the job needs with us, so you don’t need to buy or prepare anything. Once we’ve agreed what’s being done, we protect the area and start. Most jobs take most of a day for a typical house, less for a few frames. In a small place like Charlwood, access is usually the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- Each frame is looked over and we agree which ones need resealing.
- The old mastic is cut out and scraped back to clean surfaces.
- Deep gaps get closed-cell backing rod to set the depth.
- A flexible exterior sealant is applied in a colour to suit the frame.
- We tool each bead neatly and check every joint is closed.
Before we arrive
- Tell us if parking is tricky
- Let us know about stairs, lifts or work at height
- Where the joints are inside, avoid wetting them before we arrive
Getting a quote
There’s no standard price list. Instead, your job gets its own clear quote. To arrange one, call 0345 464 0079 or send us an email.
Read more
Surface by surface
uPVC windows
Fitters’ mastic on plastic frames is sometimes thin and rushed. We cut it out, back any deep gaps and reseal properly.
Composite doors
Composite doors are normally hung in an uPVC-type frame, and the joint around it is sealed like a window. The bead is colour-matched to the frame.
Charlwood questions
Can you do window mastic in Charlwood?
Yes, Charlwood is within the area we cover. We work across 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.
Is Charlwood within the area you cover?
Yes, Charlwood is covered. Our work covers 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 I paint over the new sealant?
Silicone generally won’t take paint. If you plan to paint, tell us first and we can use a paintable sealant where it suits the joint.
Is it worth trying it myself?
You can, for simple jobs. Preparation is everything: all the old sealant out, and a clean, dry joint. If it does not work out, we can redo it.
Can you do the inside joint as well?
Yes, we do both. Indoors, we seal between the frame and the plaster or reveal, using a paintable sealant if you want to decorate.
Where is Mr Mastic based?
We are based in Crawley, West Sussex, and we work across South East England, London and Scotland.
I’m a tenant. Can you help?
Of course. Ask your landlord first, and we can send them the quote if that helps.
What does window mastic cost?
It depends on the job, so we quote each one individually. To get one, phone 0345 464 0079 or email us with a short description of the job.
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DIY versus a professional finish
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it doesn’t work out, we can still put it right.