West Sussex · England
Bolney Sand Mastic
Sand mastic in Bolney from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Mastic round period door frames that has failed
- Gaps between timber frames and stone or brick
- Mastic that needs renewing before redecorating
What happens on the day
At the end, we look at the finished work together and explain the cure time. The work normally takes a few hours per window, depending on the condition of the joints, depending on the amount of work. In a small place like Bolney, access is generally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We start by checking each surround and agreeing the joints to renew.
- We rake out the old mastic and clean the joint.
- We pack any deep gaps so the mastic sits at the right depth.
- We mix the sand mastic and apply it by hand, shaping it to the joint.
- The mastic is finished to sit tidily against the stone or brick.
Preparing for the visit
- Let us know if you’ve seen damp or leaks
- Mention if the joints have been sealed before
- Clear items away from the joints we are working on
Ask for a quote
There’s no standard price list, because every job is different. Instead, your job gets its own clear quote. To get started, call 0345 464 0079 or email us.
Advice
Sand mastic in Bolney
Sand mastic skins over fairly quickly, but it takes longer to harden fully. Traditional guidance is not to paint over it, so ask us before you decorate. We work on tenement windows, stone surrounds and sash and case windows, and people most often call us about modern sealant on a period surround and window mastic to renew ahead of painting.
Homes in small places like Bolney 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.
The work is covered for a year after we finish. If anything is not right with it, phone 0345 464 0079 or email us.
- Place
- Bolney (RH17)
- Region
- West Sussex
- Cover
- A year, on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Towns and villages near Bolney
Also in Bolney
Should I try it myself first?
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
Bolney: your questions answered
Do you cover Bolney for sand mastic?
Yes, Bolney is within the area we cover. We work across London and the South East. You can call 0345 464 0079 or drop us an email and tell us what needs doing.
Can you help a landlord with a rental near Wivelsfield station?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. You can phone 0345 464 0079 or email us with the details for a clear quote.
What exactly is sand mastic?
It’s sand mixed with a linseed-oil-based binder for the joint between timber frames and masonry.
Do you take out the old sealant first?
Always. Sealing over the old bead is the commonest cause of early failure, so we never do it.
Is the work guaranteed?
Every job comes with our one-year guarantee, and we are fully insured.
What sealant do you use?
Quality sealants from brands including Arbo and Everbuild, chosen to suit the joint. We explain the product when we quote.
Can you seal over the old sealant?
No. The old sealant always comes out first, so the new sealant bonds properly.
Do you have insurance?
Yes. We are fully insured, with over 20 years’ experience in sealant work.
Aftercare tips
Good habits help new joints last longer. Our tips:
- Inspect the joints round the windows every year or so
- Make sure water runs off the sill
- Avoid heavy scraping on the mastic joint
- Do not paint over the new mastic
Avoid painting over the new mastic, which is the traditional advice. Ask us before any decorating around it.
Gaps round a sash box let in draughts and rain. The longer it’s left, the more the joint opens as more mastic falls out.
Why act early in Bolney
Replacing sash windows is a big decision for a period home and on a listed home, consent may be needed. If the frames are sound, renewing the mastic deals with gaps and draughts at the surround. Older cottages and farmhouses around Bolney can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
Leaving a failed joint generally makes the job bigger, not smaller. If you are unsure, phone 0345 464 0079 or send us an email and we will give you an honest view and a quote.
Why book with us
- Over 20 years’ experience
- Anti-fungal sanitary silicone in wet areas
- One-year guarantee on every job
- Neat joints and a tidy finish
See how sealant jobs are priced and our reviews.
Bolney homes and the weather
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Historic houses like Ockenden Manor (about 2.5 miles east) are a reminder that the area around Bolney has older buildings as well as new. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
Letting a property close to Wivelsfield station? Then cracked sand mastic around sash windows lets in the draughts tenants complain about. For site and facilities teams at buildings such as Bolney CofE Primary School, its window and door frames need their mastic kept sound, just like a home’s. If you live in an older home near St Mary Magdalene's Church, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Bolney is about 4 miles north-west of Burgess Hill, in West Sussex. Homes, rented property, offices and hotels in Bolney can book us for sand mastic, old or new, large or small. Every job comes with our one-year guarantee. Bolney is one of 371 places in West Sussex we cover. There’s also a page for Crawley, about 8 miles away.
Here we cover the RH17 postcode area for sand mastic. Whether your property is on The Street, Cherry Lane and Top Street or a nearby road, we can help. Nearby, we also carry out sand mastic in Crosspost (1 mile south-west), Twineham Green (2 miles south), Twineham (2 miles south), Wineham (3 miles south-west) and Kent Street (3 miles south-west). Larger places within reach include Crawley (8 miles north), Horsham (7 miles north-west), Worthing (15 miles south-west), Haywards Heath (5 miles east), Burgess Hill (4 miles south-east) and East Grinstead (12 miles north-east).
Near you in Bolney
Bolney’s nearest station is Wivelsfield station, roughly 4.1 miles south-east of the centre. Well-known places in the area include The Dene Hospital (2.6 miles south-east) and Cuckfield Museum (2.6 miles east). For a walk, there’s Blunts Wood and Paiges Meadow.
For landlords and businesses
Mouldy or split sealant often shows up at the end of a tenancy. Several properties can go on one quote.
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
How the job changes by surface
Sash and case windows
On a sash window, the mastic joint shows on the outside so we finish it carefully.
Brick reveals
Gaps between frame and brick let in rain and draughts. New mastic seals the gap.
When it isn’t the sealant
We will not take on work that won’t last, so these are the limits:
- Broken panes
- Damaged stone surrounds
- Whether work needs listed building consent
If you are not sure, just phone 0345 464 0079 or drop us an email and we will give you a straight answer.
What we seal
- Tenement windows
- Period & listed homes
- Stone surrounds
- Timber door frames
- Sash and case windows
- Brick reveals