West Sussex · England
Sand mastic for sash & case windows in Sutton, West Sussex
Window and door surrounds in Sutton need attention? We cut out the old, prepare the joints and apply the right sealant.
- Silicone on a period window that looks wrong
- Patchy fillers round a sash window
- Window mastic to renew ahead of painting
What sealant work cannot fix
Sealant is not the answer to every problem, and we’d rather say so up front. Sealant will not put right:
- Cracked or broken glass
- Whether work needs listed building consent
- Timber that has rotted
If in doubt, phone 0345 464 0079 or email us and we will say what we think.
Joints and surfaces we work on
- Sash and case windows
- Period & listed homes
- Stone surrounds
- Brick reveals
- Timber door frames
- Tenement windows
Sand mastic for homes and businesses in Sutton
If your home is listed or in a conservation area, check with your local planning authority if consent is needed before window work. Like-for-like sand mastic is often the preferred finish. If you have crumbling sand mastic round a window and mastic worn away on windows facing the weather, we can help, on stone surrounds, sash and case windows and brick reveals alike.
Outdoor sealant needs dry, clean surfaces, so work on frames around Sutton is planned for dry weather. Tell us about access to every side of the house, including upper-floor windows.
You get a 12-month guarantee, the same in Sutton as everywhere else we work.
- Where
- Sutton (RH20)
- Region
- West Sussex
- Guarantee
- A year, on every job
- Quotes
- A clear price before we start
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
More services for Sutton
Should I try it myself first?
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
How we quote for sand mastic
Jobs vary more than people expect. What affects the quote:
- When we can work, for business premises
- How many areas need sealing
- Whether old sealant or filler has to be cut out
- Mould in or behind the old joints
A few things move the cost up or down: the old material and how easily it comes out, any mould to treat, and whether the work is at height. Your quote takes all of that into account.
Asking for a quote
You don’t need to know the technical terms. Just tell us:
- A few pictures by email, if you can
- Roughly how big the job is
- How we’d reach the joints
- The type of property
To get a quote, call 0345 464 0079 or drop us an email with the location and a short description of the problem. We will give you a clear price before any work starts.
Work for landlords, hotels and businesses
From a single let to a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a one-year guarantee.
In hotels, rooms out of use cost money, so the work can be planned room by room around your bookings where we can. We’ve worked in hotels as well as homes and businesses.
Aftercare tips
No joint lasts for ever, but care makes a real difference. A few tips:
- Keep sills and gutters clear so water drains away
- Check the mastic when you check the paintwork
- Go gently near the mastic when preparing windows
- Renew mastic before redecorating the windows
Keep gutters and sills clear so water runs away from the surround. Water sitting against the mastic shortens its life.
Crumbling mastic lets rain into the joint. That water can reach the timber frame and the wall, so renewing it early is worth it.
Sutton questions
Do you work for landlords with property near Amberley station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. Just phone 0345 464 0079 or send us an email with the address and what needs doing, and we will give you a clear price.
Will you come out to Sutton?
Yes, smaller places are covered as well as towns. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Can old silicone round a sash window be swapped for sand mastic?
Yes. We remove the silicone and clean the joint, then point it with sand mastic.
Do the sealants smell?
Sometimes, a little. It fades as the sealant cures.
What should I tell you?
Let us know what needs doing and where. We’ll ask anything else we need to know.
Do you take out the old sealant first?
Yes, every time. New sealant will not bond properly to old, so any old material comes out before anything new goes in.
Can you work on commercial sites?
Yes. We work in offices, washrooms, hotels and other commercial premises. We can talk about working times when we quote.
Where do you work from?
We work from Crawley. We cover Sutton and the rest of West Sussex, along with the rest of our area.
The process
At the end, we look at the finished work together and tell you how long to leave it. The visit itself usually takes a few hours per window, depending on the condition of the joints, depending on the size of the job. For a village or hamlet like Sutton, 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.
- Each surround is checked first.
- We rake out the old mastic and clean the joint.
- Large voids are packed out.
- We point the joint with sand mastic by hand.
- The finish is dressed neatly.
Preparing for the visit
- Let us know about stairs, lifts or work at height
- Let us know about earlier repairs to the joints
- Move anything stored near the joints
Get a quote
For sand mastic in Sutton, phone 0345 464 0079 or email us. Tell us what the problem is and where, and we will agree the price before any work begins.
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What happens if it’s left?
A silicone bead can be quicker, but it can look wrong on a period surround. Sand mastic is the traditional material and finishes neatly against the masonry. Around Sutton, 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 is generally more efficient than separate visits, so it’s worth mentioning everything you’d like done. We’ll give you a clear price for the lot.
Why choose Mr Mastic in Sutton
- Over 20 years’ experience
- Sanitary silicone with an anti-fungal additive in wet areas
- Trusted Arbo and Everbuild sealants
- A 12-month guarantee on all work
See what affects the cost and what customers say.
Frames and glazing around Sutton
Historic houses like Bignor Roman Villa (about 0.8 miles east) are a reminder that the area around Sutton has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window. Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
In the older streets around The Parish Church of the Holy Cross, frames set in older brick or stone need a sealant that suits the wall as well as the frame. If you let a flat or house near Amberley station, cracked sand mastic around sash windows lets in the draughts tenants complain about.
Sutton is about 9 miles north-west of Littlehampton, in West Sussex. Jobs in Sutton get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. Our West Sussex coverage runs to 371 places, and Sutton is one of them. You can also see our page for Crawley, about 22 miles away.
All of RH20 is within our area for sand mastic, from the main roads to the quietest streets. Nearby, we also carry out sand mastic in 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). We also work in nearby towns such as 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).
What’s near Sutton
Sutton’s nearest station is Amberley station, roughly 3.7 miles south-east. A little further out are Coultershaw Heritage Site (2.9 miles north) and Arundel and District Hospital (5.3 miles south-east). Green spaces nearby include Bignor Hill and Amberley Wild Brooks.