Hampshire · England
Window Mastic in Chithurst
Window and door frames in Chithurst need attention? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Mastic that has split away from the wall
- Sealant in the wrong colour for the frame
- Mastic that’s falling out in pieces
About our window mastic in Chithurst
The mastic around a window or door seals the gap between the frame and the wall. When it cracks, hardens or pulls away, draughts and rain get in. Our applicators cut it out and replace it with a flexible, weatherproof sealant. If you have damp patches on the reveal after heavy rain and old mastic that has gone black or come away, we can put it right, on window sills, aluminium frames and timber windows & doors alike.
Mastic can only go onto a dry, clean joint, so window work in Chithurst is booked around the forecast. Tell us about access to every side of the house, including upper-floor windows.
Our work is backed for twelve months, in Chithurst and everywhere else we cover.
- Location
- Chithurst (GU31)
- Wider area
- Hampshire
- Cover
- A year, on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Common problems we fix in Chithurst
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.
The most common problems we see are:
- Black, perished sealant on frames
- Rain getting in at the frame or under the sill
- Whistling draughts around closed windows
- Draughty joints inside around the window
Letting a property close to Liphook station? Then cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
What your quote should include
- What insurance they hold
- How the surfaces are prepared before sealing
- Which colour the sealant will be
- How long to leave it before use
How to look after the new joints
Aftercare is simple, and it makes a real difference:
- Avoid blasting the frames with a pressure washer
- Do not paint over the silicone
- Air rooms to keep condensation down around windows
- Make sure the drainage slots are not blocked
Wipe the frames with soapy water when you clean the windows, and avoid solvent cleaners on the sealant.
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.
How the job changes by surface
Window sills
Masonry sills can have joints where water gets in, and the joint under the frame can let rain run behind. Those are sealed with a product suited to stone or concrete.
Aluminium frames
Bi-fold and sliding aluminium doors have long frame joints, and the threshold joint takes a lot of water. We prepare and reseal every joint, backing the deep ones.
Window mastic in Chithurst: local notes
Historic houses like Cowdray House (about 3.1 miles east) are a reminder that the area around Chithurst has older buildings as well as new. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic. London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For site and facilities teams at buildings such as Stedham Primary School, its window and door frames need their mastic kept sound, just like a home’s. In the older streets around Chithurst Church, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Chithurst is about 6 miles east of Petersfield, in Hampshire. Anywhere in GU31, our applicators can take on window mastic. 683 places in Hampshire are on our list, large and small. We also work in Portsmouth, around 18 miles away.
All of GU31 is within our area for window mastic. Nearby, we also carry out window mastic in Trotton Marsh (1 mile north-west), Borden (1 mile north-west), Rogate (2 miles west), Milland (2 miles north) and Rake (4 miles north-west). We also work in nearby towns such as Havant (13 miles south-west), Horndean (11 miles south-west), Alton (13 miles north-west), Waterlooville (13 miles south-west), Petersfield (6 miles west) and Purbrook (14 miles south-west).
Landmarks near Chithurst
Around Chithurst, our work takes us to homes and buildings near The Keeper's Arms Public House. The nearest railway station is Liphook station, roughly 4.9 miles north of the centre. A little further out are Midhurst Museum (2.9 miles east) and Midhurst Community Hospital (2.9 miles east). The countryside around Chithurst includes Wheeler's Down and Iping and Stedham Commons.
Should I try it myself first?
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
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 fails, we can still redo it.
Quotes for window mastic in Chithurst
We quote each job individually. These are the things that affect it:
- Any working-time requirements on site
- How many rooms, windows or areas are involved
- Any mould that needs treating
- The type of sealant required
A few things move the cost up or down: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether the work is at height. We take all of that into account in your quote.
What to tell us for a quote
Photos help, but a description is a good start. Try to tell us:
- How many joints, rooms or windows are involved
- How we’d reach the joints
- Whether it has been sealed before
- Photos by email, if that’s easy
For window mastic in Chithurst, ring 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and you’ll get a clear quote before we start.
Why it’s worth doing now in Chithurst
Getting a straight, even bead on an outside frame takes practice, especially on upper floors. We cut out properly, back deep gaps and tool every joint neatly, using a product chosen for the frame and wall. Older cottages and farmhouses around Chithurst can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
What you pay reflects the work, not a rough estimate. That is why we ask a few questions first and give you a clear price before we start.
Why Chithurst clients choose us
- 20+ years of sealant experience
- We agree the colour with you first
- A sealant colour to suit the surroundings
- We leave the area clean and tidy
Take a look at our cost guide or what customers say.
Questions from Chithurst
Can you do window mastic in Chithurst?
Yes, Chithurst is within the area we cover. Our work covers London and the South East. Just phone 0345 464 0079 or drop us an email with a few details of the job, and we’ll give you a clear quote.
Will you come out to Chithurst?
Yes. Chithurst is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Can you get sealant to suit coloured frames?
Yes, we choose a colour to suit the frame. Grey and black frames get grey or black sealant, and wood-effect frames generally suit brown.
Do I have to be there?
That depends on where the joints are. Inside work needs someone to give us access.
Can new window sealant be painted?
It depends on the sealant. Silicone is not paintable, but some hybrid sealants are. Mention any painting plans before any work starts.
Where is Mr Mastic based?
Our base is Crawley. Our area covers South East England, London and Scotland.
Can you reach windows above the ground floor?
Yes, as long as they can be reached safely. Tell us about access when you get in touch so we can plan the job.
Are you ARBOMaster approved?
Yes. Mr Mastic is an ARBOMaster approved applicator, and we are fully insured.
What we do, step by step
Most of a good job is in the preparation, and we do not rush it. Joints are cleaned back and dried before anything new goes in. In total, it usually takes anything from an hour or two to a full day, depending on how many frames there are. In a small place like Chithurst, 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.
- We remove the old mastic and clean the frame edge and wall.
- Deep gaps get closed-cell backing rod to set the depth.
- 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.
Getting ready for the visit
- Mention any tricky access
- Where the joints are inside, avoid wetting them before we arrive
- Tell us about any water getting in
Get a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and add photos by email if you can.