West Sussex · England
Sand Mastic in Coneyhurst
Sand mastic in Coneyhurst from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Cracked mastic round a front door frame
- Mastic that needs renewing before redecorating
- Cement or filler used on old window joints that has cracked
Sand mastic for homes and businesses in Coneyhurst
Across Coneyhurst, we renew sand mastic around sash and case windows. Every joint is cleaned out and filled by hand for a neat, traditional finish. We work on tenement windows, period & listed homes and timber door frames, and the jobs we see most are gaps where the frame meets the masonry and mastic round period door frames that has failed.
Around Coneyhurst, many homes face open ground, so their windows and doors take the full weather. Exposed frames and sills lose their mastic sooner than sheltered ones.
Whatever the size of the job, you get the same one-year guarantee.
- Location
- Coneyhurst (RH14)
- Region
- West Sussex
- Guarantee
- One year on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Work for landlords, hotels and businesses
Hotels need rooms back in use, so the work can be planned room by room around your bookings where we can. We have worked in hotels as well as homes and businesses.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance that we can handle for you.
Keeping the joints in good condition
Simple care keeps the joints in good condition. We recommend:
- Avoid heavy scraping on the mastic joint
- Plan mastic work ahead of painting
- Don’t run silicone over sand mastic
- Find out about consent before window work on a listed home
When preparing windows for paint, take care around the mastic. Hard scraping can loosen it.
An open joint round the box lets weather through. The longer it’s left, the more the joint opens as more mastic falls out.
What sand mastic looks like in Coneyhurst
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. Historic houses like Old Place Manor (about 4.8 miles south-west) are a reminder that the area around Coneyhurst 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.
Historic houses such as Old Place Manor, about 4.8 miles south-west, show how far back building around Coneyhurst goes. Letting a property close to Billingshurst station? Then older sash windows in a rental need their mastic kept sound to keep the weather out.
Coneyhurst is about 6 miles south-west of Horsham, in West Sussex. Coneyhurst gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. We cover 371 towns and villages across West Sussex. For nearby work, see our Crawley page, about 13 miles away.
Work in RH14 works the same way as everywhere else we cover. If you’re just outside Coneyhurst, we cover Billingshurst (2 miles north-west), Five Oaks (3 miles north), Newpound Common (3 miles north-west), The Haven (4 miles north) and Slinfold (5 miles north). We also work in nearby towns such as Crawley (13 miles north-east), Horsham (6 miles north-east), Worthing (13 miles south), Haywards Heath (14 miles east), Burgess Hill (13 miles east) and Littlehampton (14 miles south).
Landmarks near Coneyhurst
The closest station to Coneyhurst is Billingshurst station, roughly 1.2 miles north-west. Well-known places in the area include Christs Hospital School Museum (3.9 miles north-east). For a walk, there’s Knepp Wildland.
Quotes for sand mastic in Coneyhurst
Jobs vary more than people expect. What affects the quote:
- Which sealant suits the joint
- Whether old sealant or filler has to be cut out
- The amount of work
- Whether there’s mould to deal with
A few things move the cost up or down: how much old sealant there is and how stubborn it is, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
What we need to know
When you call or email, it’s useful to know:
- Whether it’s a home or a business
- What the problem is, such as mould, gaps, leaks or cracking
- Where the job is, and your postcode
- Whether it has been sealed before
Getting a quote is simple: let us know what needs doing and where, and roughly how big it is. A few pictures by email make the job easier to understand, and we’ll come back to you with a quote.
Nearby places to Coneyhurst
More services for Coneyhurst
The process
On the day, we start by going over the job with you, so there are no surprises. We protect the surfaces around the joints before work begins. Most jobs take a few hours per window, depending on the condition of the joints. In a small place like Coneyhurst, access is generally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- First, we look at the surrounds with you and agree what needs doing.
- The loose and crumbling mastic is raked out and the joint cleaned.
- Deep voids are packed so the mastic is the right thickness.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- The finish is dressed so it sits neatly against the stone or brick.
Before we arrive
- Let us know about earlier repairs to the joints
- For business premises, tell us about site rules or sign-in
- Mention any tricky access
Ask for a quote
Want a quote for sand mastic? Please call 0345 464 0079 or drop us an email with a few details. You will know what we plan to do, and what it will cost, before any work begins.
Advice
What happens if it’s left?
Not every draught comes from the sashes themselves. Gaps between the frame and the wall can be just as bad and new mastic seals them. In a small place like Coneyhurst, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
The cost reflects the work involved, not a rough estimate. That is why we ask about the job first.
Why choose Mr Mastic in Coneyhurst
- Rated 4.9 stars on Google
- Anti-fungal silicone where joints get wet
- A 12-month guarantee on all work
- Trusted Arbo and Everbuild sealants
DIY sealant or a professional job?
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
A DIY attempt does not rule out a professional job. We remove it and do the joint properly, so just mention it when you contact us.
Coneyhurst questions
Can you do sand mastic in Coneyhurst?
Yes, Coneyhurst is within the area we cover. We work across London and the South East. Just call 0345 464 0079 or drop us an email with a few details of the job, and we will give you a clear price.
Can you help a landlord with a rental near Billingshurst station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. Just ring 0345 464 0079 or email us with the address and what needs doing, and we will give you a clear price.
Where is Mr Mastic based?
We work from Crawley. Our applicators cover Coneyhurst.
Are you ARBOMaster approved?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
Can you do several jobs on one visit?
Of course. Combining jobs makes good use of the visit, so mention them when you ask for a quote.
What guarantee comes with the work?
You get our one-year guarantee to all our work.
Is it worth trying it myself?
Sometimes. The key is preparation: remove all the old material and work on a clean, dry joint. If it doesn’t work out, we can redo it.
Do you work for hotels and businesses?
Yes. We have worked for hotels, offices and other businesses, and we are fully insured.
Common problems we fix in Coneyhurst
Sand mastic slowly weathers. It hardens, cracks and starts to come away on the stone or timber.
The most common problems we see are:
- Tired mastic found when preparing windows for paint
- Mastic dropping out of the joint
- Mastic worn away on windows facing the weather
- Draughts and rain around sash boxes
Schools such as The Weald School are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages.
Before you book anyone
- What the cure time is
- Whether all the old sealant comes out first
- What preparation is included
- Which colour the sealant will be