West Sussex · England
Window Mastic in South Ambersham
Window mastic across South Ambersham and nearby, with every bit of old sealant taken out first and a 12-month guarantee.
- Cold air getting in at the frame edge
- Gaps between the frame and the inside reveal
- Untidy mastic left by window fitters
About our window mastic in South Ambersham
From a single sill to a whole house of windows, you’ll get a clear quote before any work starts. To get one, call 0345 464 0079 or drop us an email with the number of frames and any access details. We work on window sills, patio & French doors and aluminium frames, and people most often call us about black, perished sealant on frames and damp patches on the reveal after heavy rain.
Homes in small places like South Ambersham often stand in the open, with little to shelter their windows from wind and rain. Exposed frames and sills lose their mastic sooner than sheltered ones.
We stand behind the work with a one-year guarantee, so you’re not left on your own once the job is done.
- Location
- South Ambersham (GU29)
- Region
- West Sussex
- Cover
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Aftercare tips
Joint life depends on how it’s used and looked after. We suggest:
- Make sure the drainage slots aren’t blocked
- Do not use solvent cleaners on the joint
- Look round the frames every year or so
- Repaint timber before it’s bare
Keep the new mastic undisturbed while it cures, for as long as we advise. Keep jet washers away from the frames.
A small gap around a frame only grows. As the old mastic shrinks further, more air gets through, and heat escapes around the frame. A new joint closes it up.
What window mastic looks like in South Ambersham
With historic houses such as Cowdray House (about 1.7 miles north-west) nearby, there’s older building stock in the area around South Ambersham as well as newer homes. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic. 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 look after a building such as Midhurst Rother College, its window and door frames need their mastic kept sound, just like a home’s. For an older house near a landmark such as Church of St James, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
South Ambersham is about 10 miles north of Chichester, in West Sussex. We carry out window mastic for householders, landlords and businesses in South Ambersham and nearby. Our West Sussex coverage runs to 371 places, and South Ambersham is one of them. There’s also a page for Portsmouth, roughly 20 miles from South Ambersham.
Every address in GU29 is covered for window mastic, from the main roads to the quietest streets. Nearby, we also carry out window mastic in Selham (1 mile east), Graffham (2 miles south), River (2 miles north-east), Upperton (3 miles north-east) and Tillington (3 miles east). Further out, we also cover Bognor Regis (13 miles south), Chichester (10 miles south), Littlehampton (14 miles south-east), Emsworth (14 miles south-west), Rustington (14 miles south-east) and Storrington (11 miles east).
Around South Ambersham
Well-known places in the area include Midhurst Community Hospital (2 miles north-west) and Lodsworth Castle (1.1 miles east). Green spaces nearby include Graffham Common and Levin Down.
What we do, step by step
The work is kept neat and contained to the area we’re working on. The job normally takes a few hours for a few frames, or a day or more for a whole house, and we tell you how long to leave it before we go. For a village or hamlet like South Ambersham, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- We check each frame and agree which ones need doing.
- Next the failed sealant is cut away and the joint cleaned.
- We fit backing rod in deep gaps so the sealant is the right depth.
- We apply a weatherproof sealant to match the frame and tool it neatly.
- We clear up and check every joint is fully closed.
Before we arrive
- Tell us about access, such as stairs, a lift or high-level joints
- Let us know about parking restrictions
- Try not to wet indoor joints just before the visit
Getting a quote
Asking for a quote is easy: let us know the job and the location and its rough size. Photos by email help us understand the job, and we’ll take it from there.
Read more
Should I try it myself first?
If you’ve already had a go yourself, that’s fine. We cut it out and start again, so just mention it when you contact us.
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
When something else is needed
In fairness, there are a few things sealant will not fix:
- Soft or decayed wood in the frame
- Draughts through the window seals rather than the frame
- Faulty window hardware
Not sure which it is? You can call 0345 464 0079 or email us and we will tell you honestly before booking.
What we seal
- Composite doors
- Patio & French doors
- Window sills
- Aluminium frames
- Timber windows & doors
- uPVC windows
How the job changes by surface
Timber windows & doors
Where timber has rotted at the joint, it needs repairing first. We’ll point out any rot we find, as that’s a job for a joiner.
uPVC windows
uPVC expands and contracts noticeably with temperature, so the joint needs a low-modulus sealant that stays flexible. We match white, brown, anthracite grey and black frames.
FAQs for South Ambersham
Do you cover South Ambersham for window mastic?
Yes, South Ambersham is within the area we cover. We work across London and the South East. Just call 0345 464 0079 or send us an email with a few details of the job, and we’ll send you a clear quote.
What guarantee comes with window mastic in South Ambersham?
Every job comes with our one-year guarantee, wherever it is. We’re also fully insured and ARBOMaster approved.
Do I need to be at home?
We need access to the joints, so we’ll agree that with you when we book. For inside work, that normally means someone being in.
Is it worth trying it myself?
Some simple jobs can be done by a careful DIYer. Most DIY failures come from sealing over old material, wet joints or too much sealant.
Can landlords and businesses book you?
Yes, regularly. Several properties can go on one quote, and between tenancies is a good time for the work.
Are you ARBOMaster approved?
Yes. We’re an ARBOMaster approved applicator, the approved applicator scheme for Arbo sealants.
Can resealing stop a draught around my window?
In many cases. The gap between frame and wall is a common source of draughts, and resealing inside and out closes it.
I rent my home. Can I book you?
Yes, though it’s best to check with your landlord first. Many landlords are glad to have it sorted.
For landlords and businesses
Housing providers, facilities teams and property managers book us too in South Ambersham and across West Sussex. We can quote a run of properties together, and we’re fully insured for the work.
Whether it’s one flat or a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
Also near South Ambersham
Other services in South Ambersham
What happens if it’s left?
A quick bead over the top of old mastic looks like an easy fix, but it won’t grip old, dirty sealant. It soon lifts and the leak carries on behind it. The old mastic has to come out. Around South Ambersham, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
Combining jobs into one visit normally makes better use of the time than several visits, so tell us about everything that needs sealing. You will get one clear quote for the whole job.
Why us?
- You choose the colour before work begins
- White, clear, grey or another colour, product permitting
- Sealant colour chosen to suit
- Any old sealant cut out fully, not covered over
Take a look at how sealant jobs are priced or what customers say.