Surrey · England
Sand mastic for sash & case windows in Crowhurst, Surrey
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in Crowhurst and across Surrey. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Window mastic to renew ahead of painting
- Gaps round a timber door in stone or brick
- Old cement repairs round a window that have failed
About our sand mastic in Crowhurst
We renew sand mastic around sash windows and doors set in stone or brick. Out comes the old, loose mastic, the joint is prepared and new mastic is shaped by hand. If you have gaps round a timber door in stone or brick and open joints round the window box, we can put it right, whatever the surface.
In a village or hamlet like Crowhurst, older cottages and farmhouses often have timber windows set in stone or brick. Older buildings like these do not always suit modern silicone, and sometimes a traditional sand mastic is the better choice.
There’s a 12-month guarantee on every job, whatever its size.
- Location
- Crowhurst (RH7)
- Wider area
- Surrey
- Guarantee
- One year on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Why it’s worth doing now in Crowhurst
Not every filler suits an old window surround. Sand mastic matches what was there, which can matter on listed and conservation-area homes. Around Crowhurst, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
Homes and businesses are quoted the same way: the amount of work, the access and the products needed, plus any working-time requirements on site. Ask us for a quote and we will go through it with you.
Why choose Mr Mastic in Crowhurst
- 180+ five-star Google reviews
- Fully insured
- Trusted Arbo and Everbuild sealants
- We never seal over old sealant
Read our cost guide and our reviews.
Also near Crowhurst
More services for Crowhurst
Honest limits
New sealant can’t fix everything, and we’ll tell you before we start. It will not solve:
- Sashes that need overhauling
- Masonry that needs repairing
- Decayed frames that need repair
If in doubt, ring 0345 464 0079 or email us and we’ll say what we think.
Joints and surfaces we work on
- Brick reveals
- Sash and case windows
- Tenement windows
- Timber door frames
- Stone surrounds
- Period & listed homes
Looking after it afterwards
No joint lasts for ever, but care makes a real difference. A few tips:
- Find out about consent before window work on a listed home
- Avoid heavy scraping on the mastic joint
- Keep modern sealant off the mastic
- Plan mastic work ahead of painting
Keep gutters and sills clear so water runs away from the surround. Constant wetting wears the mastic faster.
Crumbling mastic lets rain into the joint. That water can reach the timber frame and the wall, so renewing it early is worth it.
Crowhurst homes and the weather
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Historic houses like Chartwell (about 4.7 miles north-east) are a reminder that the area around Crowhurst has older buildings as well as new. In older buildings, 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 Godstone station? Then older sash windows in a rental need their mastic kept sound to keep the weather out.
Crowhurst is about 6 miles north of East Grinstead, in Surrey. Whether you’re in the middle of Crowhurst or further out, sand mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Across Surrey, we cover 395 places, Crowhurst among them. There’s also a page for Crawley, roughly 10 miles from Crowhurst.
All of RH7 is within our area for sand mastic. Nearby, we also carry out sand mastic in Crowhurst Lane End (1 mile north-west), Merle Common (1 mile north-east), South Godstone (2 miles north-west), Troy Town (2 miles east) and Tandridge (2 miles north-west). Within a short drive, we also cover Epsom (14 miles north-west), Horley (7 miles west), Redhill (7 miles west), Ewell (15 miles north-west), Reigate (8 miles west) and Caterham (6 miles north-west).
Near you in Crowhurst
The nearest railway station is Godstone station, about 1.9 miles west of the centre. Other landmarks nearby include Haxted Watermill Museum (2.1 miles south-east) and Bletchingley Castle (4.7 miles north-west). Open spaces near Crowhurst include Hedgecourt Lake and Botley Hill.
Common questions in Crowhurst
Do you cover Crowhurst for sand mastic?
Yes. We work across London and the South East, and Crowhurst is part of that. Just ring 0345 464 0079 or email us with a few details of the job.
Is Crowhurst within the area you cover?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Is it worth trying it myself?
Some simple jobs can be done by a careful DIYer. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Do you work for landlords and businesses?
Yes, we do. Domestic, commercial and hotel work are all part of what we do.
What do you need from me for a quote?
A short description and the location, plus photos if you have them. We will ask anything else we need to know.
Do the sealants smell?
There can be a smell while the sealant cures. Opening a window helps.
Which products do you use?
Each joint gets the product that suits it. Where it moves, gets wet or faces the weather makes a difference, and we’ll explain our choice.
Is it possible to take out silicone and use sand mastic instead?
Usually, yes. With the silicone removed and the joint cleaned we point it with sand mastic.
Can I do it myself?
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
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. All the old material has to come out first.
What affects the cost of sand mastic
For a quick quote, just ask. What matters most is:
- How much there is to do
- Whether the work is at height
- The old material and how stubborn it is
- Working hours on commercial sites
Doing several joints on one visit usually makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. You’ll get one clear quote for the whole job.
What to tell us for a quote
To make quoting easier, please include:
- What’s wrong with the joints now
- Pictures of the joints, sent by email
- If it’s domestic, commercial or a hotel
- How we’d reach the joints
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’s easy.
Signs you need sand mastic in Crowhurst
Most of it is simply age. Sand mastic is a maintenance item like any pointing and how long it lasts depends on the weather it faces.
Any of these means the joints need attention:
- Draughts and rain around sash boxes
- Silicone on a period window that looks wrong
- Tired mastic found when preparing windows for paint
- Old sand mastic that has cracked, crumbled or fallen out
In the older streets around Church of St George, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Comparing quotes
- Whether all the old sealant comes out first
- How hidden problems are handled
- What the quote includes, VAT included or not
- How long the guarantee is
How the visit works
At the end, we look at the finished work together and tell you how long to leave it. The work normally takes a few hours for a single window, longer for several, depending on the amount of work. Somewhere like Crowhurst needs a little journey planning: 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.
- We check each window surround and the condition of the joint.
- We rake out the old mastic and clean the joint.
- We fill deep gaps so the new mastic isn’t too thick.
- We point the joint with sand mastic by hand.
- The finish is dressed neatly.
How to prepare
- Tell us if parking is tricky
- Tell us about any water getting in
- Clear items away from the joints we’re working on
Getting a quote
For a quote, phone 0345 464 0079 or drop us an email with the location and a short description of the problem. You will have a clear quote before we start.