West Sussex · England
Sand mastic for sash & case windows in Rowfant, West Sussex
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in Rowfant and across West Sussex. Fully insured, ARBOMaster approved and guaranteed for a year.
- Gaps round a timber door in stone or brick
- Gaps between timber frames and stone or brick
- A silicone bead on a sash window that spoils the look
When to call us in Rowfant
Some old mastic was never deep enough. A thin layer doesn’t hold well so we make sure the new mastic is the right thickness.
The most common problems we see are:
- Tired mastic found when preparing windows for paint
- Draughts and rain around sash boxes
- Mastic worn away on windows facing the weather
- Gaps round a timber door in stone or brick
Letting a property close to Three Bridges station? Then any sash windows need sound mastic to keep draughts and rain out.
Questions to ask before you book
- How the joint is cleaned and prepared
- Is the old sealant removed completely?
- Which colour the sealant will be
- The length of the guarantee
Sand mastic in Rowfant, done properly
On many period windows, sand mastic looks right and suits the building. Newer frames usually get a flexible sealant instead, and we will talk through which suits your home. We are often asked to deal with cement or filler used on old window joints that has cracked and modern sealant on a period surround, on sash and case windows, timber door frames and period & listed homes.
In a village or hamlet like Rowfant, older cottages and farmhouses often have timber windows set in stone or brick. Older buildings like these do not always suit modern silicone, so the sealant has to be chosen to suit the building.
All of our work is guaranteed for twelve months.
- Location
- Rowfant (RH10)
- Region
- West Sussex
- Guarantee
- 12 months on all our work
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
What sealant work can’t fix
New sealant cannot fix everything, and we’d rather say so up front. It won’t solve:
- Sashes that rattle, stick or won’t open
- Decisions on consent for listed homes
- Broken panes
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we will tell you honestly before booking.
Joints and surfaces we work on
- Sash and case windows
- Period & listed homes
- Brick reveals
- Timber door frames
- Tenement windows
- Stone surrounds
Questions from Rowfant
Can you help a landlord with a rental near Three Bridges station?
Yes. We work for letting agents and landlords as well as homeowners. You can phone 0345 464 0079 or drop us an email with the details for a clear quote.
Can you do sand mastic in Rowfant?
Yes. We work across London and the South East, and Rowfant is part of that. You can ring 0345 464 0079 or drop us an email and tell us what needs doing, and we’ll give you a clear price.
Will the old sealant be removed?
Yes, always, and completely. New silicone doesn’t stick to old silicone, so any old material comes out before anything new goes in.
Which is right for my windows, sand mastic or modern sealant?
Sand mastic usually suits period timber windows best. Modern frames normally suit a flexible sealant, and we’ll explain why.
What sealant do you use?
We choose the sealant for the joint, not the other way round. Where it moves, gets wet or faces the weather makes a difference, and we’ll tell you what we’re using.
Can you seal over the old sealant?
No. New silicone will not bond to old silicone, and anything trapped underneath, including mould and water, stays there. It all has to come out first.
Are you ARBOMaster approved?
Yes. We are approved under the ARBOMaster scheme, which is run for the Arbo sealant brand.
Are you fully insured?
Yes. We are fully insured for every job we do.
The process
On the day, there’s very little for you to do. Show us the job and we will take it from there. The job generally takes anything from a few hours to a full day, depending on how many windows. For a village or hamlet like Rowfant, 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.
- We look at the surrounds with you and agree the joints to renew.
- We remove the old, loose mastic.
- Deep gaps are packed so the mastic sits at the right depth.
- We apply the mastic by hand and shape it.
- We dress the finish so it sits neatly against the masonry.
Getting ready for the visit
- Tell us about any previous sealing or DIY attempts
- Plan for the work area to be out of bounds to pets and children
- On commercial sites, let us know about site rules
How to get a quote
Asking for a quote is easy: tell us what needs doing and where, and roughly how big it is. Photos by email help us understand the job, and we’ll come back to you with a quote.
Related advice
Windows and doors in Rowfant
With historic houses such as Gravetye Manor (about 2.7 miles south-east) nearby, there’s older building stock in the area around Rowfant as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you live in an older home near All Saints Parish Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. Managing a site like Turners Hill CofE Primary School? Then the mastic around its windows and doors needs looking after like any other building’s.
Rowfant is about 4 miles east of Crawley, in West Sussex. Homes, rented property, offices and hotels in Rowfant is covered for sand mastic, old or new, large or small. The work is guaranteed for a year. Our West Sussex coverage runs to 371 places, and Rowfant is one of them.
Jobs for sand mastic in RH10 is quoted and booked the same way as anywhere else. Other places close to Rowfant include Copthorne (2 miles north-west), Worth (2 miles west), Pound Hill (2 miles west), Maidenbower (2 miles south-west) and Keeper's Corner (2 miles north). Larger places within reach include Crawley (4 miles west), Horsham (10 miles west), Haywards Heath (8 miles south), Burgess Hill (11 miles south), East Grinstead (4 miles east) and Broadfield (5 miles west).
Around Rowfant
For rail, the closest station is Three Bridges station, about 2.6 miles west of the centre. Well-known places in the area include County Mall (3.6 miles west) and Langley Green Hospital (4 miles west). Green spaces nearby include Hedgecourt Lake.
Towns and villages near Rowfant
More services for Rowfant
What affects the cost of sand mastic
Your quote is based on your job. We look at:
- Working hours on commercial sites
- How many areas need sealing
- Mould in or behind the old joints
- How much there is to do
What it costs depends on the amount of work, how much old material has to come out and access to the work. You will have a clear quote before any work starts.
What we need to know
There’s no need for technical detail. Just tell us:
- Where the job is, and your postcode
- Any previous sealing or DIY work
- What the problem is, such as mould, gaps, leaks or cracking
- How we’d reach the joints
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints.
Aftercare tips
Aftercare is simple, and it makes a real difference:
- Clear gutters so water doesn’t pour onto the windows
- Renew mastic before redecorating the windows
- Check the mastic when you check the paintwork
- Find out about consent before window work on a listed home
Leave the new mastic unpainted, which is the traditional advice. If you are redecorating, ask us first.
Renewing mastic before redecorating saves doing it twice. Paint over cracked mastic only covers it up.
For landlords and businesses
Letting agents often deal with us directly. Tell us the address, the job and how access works and we will quote.
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Resealing at the right time is simple maintenance.
Why act early in Rowfant
Filling over old, loose mastic doesn’t last. We remove the loose material first so the new mastic stays put. In a small place like Rowfant, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
Every job is a little different, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all make a difference.
Why us?
- A 12-month guarantee on all work
- Rated 4.9 stars on Google
- Any old sealant cut out fully, not covered over
- Experience in homes, commercial sites and hotels