West Sussex · England
Window & door mastic in Sutton, West Sussex
Professional window mastic in and around Sutton, with old sealant always removed completely and a 12-month guarantee.
- Sealant in the wrong colour for the frame
- Cold air getting in at the frame edge
- Mastic that’s falling out in pieces
Common problems we fix in Sutton
Water runs down the glass onto the sill, so the sill ends and the joint below the frame are common leak points. When that sealant fails, water gets into the wall or under the frame.
These are the problems we are asked about most:
- Sealant in the wrong colour for the frame
- Cold air getting in at the frame edge
- Gaps where the sill meets the wall
- Black, perished sealant on frames
For landlords with property near Amberley station, 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 guarantee comes with the work
- Whether the sealant suits the joint
- How the surfaces are prepared before sealing
- What happens if they find a problem under the old sealant
How we handle window mastic in Sutton
Some gaps around frames are far deeper than they look. Filling it with sealant alone leaves a joint that can’t move properly, so we fit backing rod to set the right depth. The sealant then grips the two sides it should. We’re often asked to deal with draughty joints inside around the window and rain getting in at the frame or under the sill, on timber windows & doors, composite doors and aluminium frames.
Somewhere as small as Sutton, older homes often have timber frames set in stone or brickwork. Not every older frame suits a modern silicone bead, so the sealant has to be chosen to suit the building.
There’s a 12-month guarantee on every job.
- Location
- Sutton (RH20)
- Wider area
- West Sussex
- Cover
- A year, on every job
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
How the visit works
We bring everything the job needs with us, so there’s nothing for you to buy. After a quick look at the joints together, we protect the area and start. It normally takes most of a day for a typical house, less for a few frames. Somewhere like Sutton needs a little journey planning: 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.
- First, we confirm safe access to each frame.
- Old, cracked mastic is removed completely.
- The surfaces are cleaned and left dry, and primed where the sealant calls for it.
- Backing rod fills deep voids and the sealant goes in on top.
- We tool the joint so water runs off, then clear up.
How to prepare
- Mention if the joints have been sealed before
- Tell us if parking is tricky
- Let us know if you’ve seen damp or leaks
Getting 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.
Advice
Frames and glazing around Sutton
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. With historic houses such as Bignor Roman Villa (about 0.8 miles east) nearby, there’s older building stock in the area around Sutton as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic.
In the older streets around The Parish Church of the Holy Cross, the joint between an old wall and a newer frame is usually the first place rain gets in.
Sutton is about 9 miles north-west of Littlehampton, in West Sussex. From the centre of Sutton to the outskirts, window mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Across West Sussex, we cover 371 places, Sutton among them. You can also see our page for Crawley, about 22 miles away.
Work in RH20 is quoted and booked the same way as anywhere else. Neighbouring places we cover for window mastic include Duncton (2 miles north-west), East Lavington (2 miles north-west), Rotherbridge (3 miles north), Graffham (3 miles north-west) and Haslingbourne (3 miles north). Larger places within reach include Worthing (12 miles south-east), Bognor Regis (10 miles south), Chichester (9 miles south-west), Selsey (15 miles south-west), Littlehampton (9 miles south-east) and Lancing (14 miles south-east).
Near you in Sutton
The closest station to Sutton is Amberley station, roughly 3.7 miles south-east. Nearby you will also find Coultershaw Heritage Site (2.9 miles north) and Arundel and District Hospital (5.3 miles south-east). Not far away are Bignor Hill and Amberley Wild Brooks.
What the job involves on each surface
Patio & French doors
Not every patio door leak is a mastic problem: blocked drain slots, worn brush seals and threshold details can let water in too. We check before we reseal.
Aluminium frames
Aluminium needs a sealant that bonds to coated metal and we avoid acetoxy silicones, which can react with some metals. Neutral-cure sealant is the safe choice.
Work for landlords, hotels and businesses
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a one-year guarantee.
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. Several properties can be quoted together.
Questions from Sutton
Can you do window mastic in Sutton?
Yes. We work across London and the South East, and Sutton is part of that. You can call 0345 464 0079 or send us an email and tell us what needs doing.
I let a flat near Amberley station. Can you help?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before we start.
Does someone need to be in?
Access is agreed with you when the job is booked. For inside work, that normally means someone being in.
How long does it take to reseal the windows on a house?
That depends on the number of frames, how they’re reached and the state of the old mastic. We will tell you how long your job needs when we quote.
Is the new sealant paintable?
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 messy?
We keep the work tidy. Nearby surfaces are protected.
Where is Mr Mastic based?
We are a Crawley-based firm, with over 20 years’ experience. Our area covers South East England, London and Scotland.
Is the work guaranteed?
Yes. All our work carries a 12-month guarantee, and we are ARBOMaster approved applicators.
Also in Sutton
Why it’s worth doing now in Sutton
Running fresh sealant over the old joint is tempting, but it won’t grip old, dirty sealant. It peels before long, and water still gets in behind. The old mastic has to come out. Older cottages and farmhouses around Sutton can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Combining jobs into one visit generally makes better use of the time than several visits. You will get one clear quote for the whole job.
Why Sutton customers choose us
- Quality sealants from Arbo and Everbuild
- We never seal over old sealant
- ARBOMaster approved applicator
- 20+ years of sealant experience
When it isn’t the sealant
We’d rather tell you now than do work that will not last, so these are the limits:
- A sash or casement that will not close properly
- Worn gaskets, brush seals or a door that has dropped
- A frame that has rotted at the joint
If you are not sure, just phone 0345 464 0079 or drop us an email and we’ll give you a straight answer.
What we seal
- Patio & French doors
- Timber windows & doors
- Composite doors
- uPVC windows
- Aluminium frames
- Window sills
DIY sealant or a professional job?
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
Some sealant jobs are within reach of a careful DIYer, 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.