West Sussex · England
Sand mastic for sash & case windows in Kent Street, West Sussex
Professional sand mastic in and around Kent Street, with every bit of old sealant taken out first.
- Patchy fillers round a sash window
- Mastic round period door frames that has failed
- Tired mastic found when preparing windows for paint
Aftercare tips
So the new joints stay in good condition:
- Ask us before painting near the mastic
- Avoid patching sand mastic with silicone
- Ask the planning authority about consent for listed or conservation-area homes
- Make sure water runs off the sill
Don’t touch or press the mastic while it hardens. It skins over quickly but needs longer to fully harden.
Once mastic starts to crumble, rain gets in. That water can reach the timber frame and the wall so early renewal protects both.
How we handle sand mastic in Kent Street
Fresh sand mastic forms a skin quite soon, but it takes longer to harden fully. Traditional guidance is not to paint over it, so ask us before you decorate. We work on sash and case windows, stone surrounds and brick reveals, and people most often call us about mastic that needs renewing before redecorating and a silicone bead on a sash window that spoils the look.
In a village or hamlet like Kent Street, 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.
Our work is backed for twelve months, in Kent Street and everywhere else we cover.
- Where
- Kent Street (RH13)
- Region
- West Sussex
- Cover
- A year, on every job
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Kent Street: your questions answered
Is Kent Street within the area you cover?
Yes. Kent Street is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Is sand mastic in Kent Street guaranteed?
All our work, in Kent Street and everywhere else, comes with a 12-month guarantee. We are also fully insured and ARBOMaster approved.
Can you quote for more than one area?
Yes. More than one area can be quoted together.
Are you fully insured?
Yes. We are fully insured.
How long does sand mastic take to harden?
A skin forms quite soon, but full hardening takes longer. We will explain what to expect before we leave.
Are you ARBOMaster approved?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we’re part of it.
Do the sealants smell?
Some sealants have a smell while they cure. Opening a window helps.
What do you put in the joint?
We choose the sealant for the joint, not the other way round. Movement, water and weather all affect the choice, and we’ll explain our choice.
Towns and villages near Kent Street
Also in Kent Street
Common problems we fix in Kent Street
Over the years, sand mastic weathers. It dries out, cracks and loses its grip from the frame or the masonry.
Any of these means the joints need attention:
- Tired mastic found when preparing windows for paint
- Gaps round a timber door in stone or brick
- Draughts and rain around sash boxes
- Weathered mastic on the most exposed windows
For jobs in and around Kent Street, choosing the right material for each joint is as important as a tidy finish.
Questions to ask before booking
- What the cure time is
- How the colour is chosen
- What preparation is included
- Whether they’re fully insured
Why act early in Kent Street
New mastic over crumbling mastic will not hold. Raking out and preparing the joint gives it a sound base so the new work lasts. In a small place like Kent Street, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
Rather than a set price list, we look at what your job involves: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Why book with us
- 20+ years of sealant experience
- 4.9 on Google from 180+ five-star reviews
- We’re fully insured
- Old sealant always removed completely
Read our cost guide or what customers say.
How it works
There’s no need to move everything out before we come, only the area right around the joints. Everything nearby is protected, and the work takes a few hours per window, depending on the condition of the joints for a typical job. For a village or hamlet like Kent Street, the journey is planned in advance: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- Each surround is checked first.
- The joint is raked out and cleaned.
- We fill deep gaps so the new mastic isn’t too thick.
- We point the joint with sand mastic by hand.
- We finish the mastic to a tidy line.
How to prepare
- Mention any sign-in or site rules at work premises
- Tell us about access, such as stairs, a lift or high-level joints
- Mention if the joints have been sealed before
Ask for a quote
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we will explain how we’d tackle it. Whenever you’re ready, ring 0345 464 0079 or email us.
Advice
When something else is needed
It helps to know what we cannot do too:
- Putty and glazing repairs
- Planning or listed building consent (your local planning authority decides)
- Sashes that rattle, stick or won’t open
Not sure which it is? You can call 0345 464 0079 or email us and we’ll tell you honestly.
Surfaces we seal
- Period & listed homes
- Brick reveals
- Timber door frames
- Stone surrounds
- Tenement windows
- Sash and case windows
Landlord and commercial work in Kent Street
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. We can quote for more than one property at once.
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance.
What affects the cost of sand mastic
We don’t publish a price list, because no two jobs are the same. What we look at:
- Working hours on commercial sites
- Mould in or behind the old joints
- The size of the job
- Whether old sealant or filler has to be cut out
What it costs depends on the size of the job, how much old material has to come out and how easy the joints are to reach. You will have a clear quote before any work starts, so you know where you stand.
What to tell us for a quote
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- How we’d reach the joints
- How many joints, rooms or windows are involved
- Whether it has been sealed before
- What the problem is, such as mould, gaps, leaks or cracking
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and email pictures if that is easy.
Kent Street homes and the weather
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
In and around Kent Street, as anywhere, good sand mastic starts with a clean, dry, properly prepared joint.
Kent Street is about 5 miles west of Burgess Hill, in West Sussex. Homes, rented property, offices and hotels in Kent Street can book us for sand mastic. The work is guaranteed for a year. Kent Street is one of 371 towns and villages in West Sussex where we work. You can also see our page for Crawley, roughly 10 miles from Kent Street.
Here we cover the RH13 postcode area for sand mastic. If you’re just outside Kent Street, we cover Wineham (1 mile south-east), Cowfold (1 mile north-west), Twineham Green (2 miles east), Shermanbury (2 miles south-west) and Twineham (2 miles south-east). Larger places within reach include Crawley (10 miles north), Horsham (7 miles north-west), Worthing (12 miles south-west), Haywards Heath (7 miles east), Burgess Hill (5 miles east) and East Grinstead (15 miles north-east).
Local landmarks in Kent Street
Nearby you will also find The Dene Hospital (3.8 miles east). Green spaces nearby include Knepp Wildland.