Surrey · England
Sand mastic for sash & case windows in Hurst Green, Surrey
Our applicators work in Hurst Green on traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old material cut out, joints cleaned and sealed neatly and every job guaranteed for a year.
- Crumbling sand mastic round a window
- Mastic worn away on windows facing the weather
- Old cement repairs round a window that have failed
Sand mastic for homes and businesses in Hurst Green
Sand mastic suits most period window surrounds. Newer frames usually get a flexible sealant instead and we’ll explain which is best for yours. We are often asked to deal with open joints round the window box and failed mastic on an exposed elevation, across period & listed homes, timber door frames and brick reveals.
Outdoor sealant needs dry, clean surfaces, so work on frames around Hurst Green is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
We stand behind the work with a 12-month guarantee, so you’re covered after we’ve gone.
- Location
- Hurst Green (RH8)
- Region
- Surrey
- Cover
- One year on every job
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
What the job involves on each surface
Stone surrounds
We take care not to mark the stone while raking out the old mastic.
Sash and case windows
The mastic round a sash window is on show, so a neat, even finish matters.
Signs you need sand mastic in Hurst Green
Scraping and sanding before painting can loosen old mastic. Many people find it crumbling when they prepare the windows, which is a good time to renew it.
Signs it’s time to call us include:
- Wind and rain getting in round a sash window
- Old sand mastic that has cracked, crumbled or fallen out
- Patchy fillers round a sash window
- Cracked mastic round a front door frame
In the older streets around St Agatha's Hall, the joint between an old wall and a newer frame is usually the first place rain gets in.
What to look for in a quote
- How the colour is chosen
- What insurance they hold
- Which sealant they’ll use, and why
- What the cure time is
Sand mastic in Hurst Green: local notes
Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Historic houses like Titsey Place (about 2.3 miles north) are a reminder that the area around Hurst Green 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.
For site and facilities teams at buildings such as Hurst Green Infant School, the mastic around its windows and doors needs looking after like any other building’s. If you let a flat or house near Hurst Green station, older sash windows in a rental need their mastic kept sound to keep the weather out.
Hurst Green is about 1 mile south of Oxted, in Surrey. From the centre of Hurst Green to the outskirts, sand mastic is available for homes and businesses alike. Our Surrey coverage runs to 395 places, Hurst Green among them. Crawley is on our list too, around 12 miles away.
Work in RH8 is quoted and booked the same way as anywhere else. You’ll find streets such as Oast Road, Spring Lane and Quarry Road. Close by, we work in Oxted (1 mile north), Limpsfield (1 mile north-east), Pains-Hill (1 mile east), Tandridge (2 miles west) and Merle Common (2 miles south-east). Larger places within reach include Epsom (13 miles north-west), Horley (9 miles south-west), Redhill (7 miles west), Ewell (13 miles north-west), Reigate (9 miles west) and Caterham (5 miles north-west).
Around Hurst Green
In Hurst Green, that means homes and buildings near Hazelwood School and Oxted School, among other places. There’s a railway station in Hurst Green itself: Hurst Green station. A little further out are Haxted Watermill Museum (4 miles south) and Bletchingley Castle (4.6 miles west). For a walk, there’s Bay Pond and Botley Hill.
What we do, step by step
Every visit runs the same way: we check the joints, protect the area around them, do the work and tidy away. Most jobs take anything from a few hours to a full day, depending on how many windows. Somewhere like Hurst Green needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- We check the window surrounds and agree which joints need renewing.
- The loose and crumbling mastic is raked out and the joint cleaned.
- Large voids are packed out first, so the mastic is not too thick.
- The mastic is mixed, pressed into the joint by hand and shaped.
- The finish is dressed so it sits neatly against the stone or brick.
Preparing for the visit
- For indoor joints, keep the area dry beforehand if you can
- Clear items away from the joints we are working on
- Tell us about access, such as stairs, a lift or high-level joints
Get a quote
To get a quote, phone 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. You will have a clear quote before work begins.
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How we quote for sand mastic
We do not publish a price list. The quote depends on:
- How much old sealant there is and how hard it is to remove
- Any mould that needs treating
- How much there is to do
- The type of sealant required
There are no prices on our website, because each job is priced on what it involves. Call for a quick quote.
What to tell us for a quote
What to tell us when you ask for a quote:
- Whether it has been sealed before
- Whether it’s a home or a business
- The problem you’ve noticed
- The address or postcode of the job
There’s no standard price list. Instead, your job gets its own clear quote. To get started, phone 0345 464 0079 or drop us an email.
Looking after it afterwards
Good habits help new joints last longer. A few tips:
- Renew mastic before redecorating the windows
- Check with your local planning authority if your home is listed
- Take care around the mastic when scraping paint
- Do not paint over the new mastic
Leave the new mastic alone while it firms up. It forms a skin fairly soon 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.
When something else is needed
We will always be straight with you, so here’s what sealant can’t fix:
- Broken panes
- Decayed frames that need repair
- Sashes that rattle, stick or will not open
If in doubt, call 0345 464 0079 or email us and we will say what we think.
Where we work in Hurst Green
- Brick reveals
- Timber door frames
- Stone surrounds
- Sash and case windows
- Tenement windows
- Period & listed homes
Also near Hurst Green
Other services in Hurst Green
Hurst Green: your questions answered
Do you cover smaller places like Hurst Green?
Yes, Hurst Green is covered. Our work covers London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Do you work for landlords with property near Hurst Green station?
Yes. We work for landlords and agents as well as homeowners. Just call 0345 464 0079 or send us an email with the address and what needs doing, and we’ll give you a clear quote.
Can old silicone round a sash window be swapped for sand mastic?
Yes, we do this often. The old silicone has to come out completely so the mastic can sit properly.
Will it make a mess?
Tidy work is part of the job. We protect what’s around the joints, and the area is left clean when we finish.
What’s sand mastic made of?
Sand plus a binder based on linseed oil. It’s applied by hand and finished to sit neatly against the masonry.
How long will you be here?
It depends on the size of the job, but most jobs take a few hours for a single window, longer for several. We will give you a better idea when we quote.
Is it OK to seal over old sealant?
No, and we never do. It can look neat for a few weeks, but the new layer lifts away from the old one. Removing the old sealant completely is the only lasting way.
Can I paint the new mastic?
It’s traditionally left unpainted, as guidance on traditional windows advises. Talk to us before any painting near it.
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.
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it does not work out, we can still put it right.