Surrey · England
Sand mastic for sash & case windows in New Haw, Surrey
Our applicators work in New Haw 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.
- Modern sealant on a period surround
- Gaps between timber frames and stone or brick
- Wind and rain getting in round a sash window
Sand mastic in New Haw, done properly
If your home is listed or in a conservation area, check with your local planning authority whether consent is needed for work to windows. Sand mastic is often favoured as a like-for-like material. We work on period & listed homes, timber door frames and stone surrounds, and people most often call us about old sand mastic that has cracked, crumbled or fallen out and old cement repairs round a window that have failed.
In a smaller place like New Haw, some walls face open ground and catch the full force of the weather. That’s hard on the mastic around frames and sills.
Big or small, it’s backed by our one-year guarantee.
- Place
- New Haw (KT15)
- Wider area
- Surrey
- Guarantee
- One year on every job
- Price
- A clear price before work begins
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Your questions about sand mastic in New Haw
Do you cover New Haw for sand mastic?
Yes. Our work covers London and the South East, and New Haw is part of that. You can phone 0345 464 0079 or email us and tell us what needs doing, and we will send you a clear quote.
Can you help a landlord with a rental near Byfleet & New Haw station?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or email us with the address and a few details, and we will give you a fixed price before we start.
Do you work for hotels and businesses?
Yes. We’ve worked for hotels, offices and other businesses and we are fully insured.
How do I get a quote for sand mastic in New Haw?
We do not publish prices, because the cost depends on the job: its size, the old material, access and the product needed. You will get a clear quote before any work starts.
Can I do it myself?
You can, for simple jobs. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
Can you replace silicone on a period window with sand mastic?
Yes. We remove the silicone and clean the joint before the sand mastic goes in.
Where do you work from?
Our base is Crawley, with over 20 years’ experience. Our area covers South East England, London and Scotland.
Will it make a mess?
No. We work neatly, protect the area around the joints and tidy up afterwards.
DIY versus a professional finish
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
Looking after it afterwards
No joint lasts for ever, but care makes a real difference. Our tips:
- Find out about consent before window work on a listed home
- Renew mastic before redecorating the windows
- Ask a joiner to look at soft timber first
- Leave the new mastic unpainted
Don’t touch or press the mastic while it hardens. It skins over quickly but needs longer to fully harden.
An open joint round the box lets weather through. Left, the gap tends to get bigger as more mastic falls out.
New Haw homes and the weather
Historic houses like Byfleet Manor (about 1.9 miles south-east) are a reminder that the area around New Haw has older buildings as well as new. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. 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.
If you look after a building such as The Grange Community Infant School, its window and door frames need their mastic kept sound, just like a home’s. If you live in an older home near All Saints Church, the joint between an old wall and a newer frame is usually the first place rain gets in.
New Haw is about 2 miles south-west of Weybridge, in Surrey. Jobs in New Haw get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. New Haw is one of 395 places in Surrey we cover for sand mastic. There’s also a page for London, about 20 miles away.
Jobs for sand mastic in KT15 is quoted and booked the same way as anywhere else. Whether your property is on Hawthorn Way, Woodham Lane and Mayfield Avenue or anywhere close by, we can help. New Haw sits on or near the A318 and B385, which makes travel easy. We also cover the places around New Haw: Byfleet (1 mile south-east), Brooklands (1 mile east), Addlestone (1 mile north), Wisley (2 miles south) and St George's Hill (2 miles east). Further out, we also cover Guildford (8 miles south-west), Woking (4 miles south-west), Camberley (10 miles west), Epsom (10 miles east), Ewell (10 miles east) and Egham (6 miles north-west).
Near you in New Haw
Around New Haw, our work takes us to homes and buildings near Manor Farm, Fullbrook School and The Station pub. The closest station to New Haw is Byfleet & New Haw station, about 0.6 miles east of the centre. Nearby you’ll also find The Hockey Museum (3.6 miles south-west) and Runnymede Hospital (2.3 miles north-west). Not far away are Papercourt Marshes and Ferris Meadow Lake.
Landlord and commercial work in New Haw
Housing providers, facilities teams and property managers book us too. Several sites can be quoted together, and we’re fully insured for the work.
From a single let to a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.
Do you need sand mastic in New Haw?
Paint, silicone or cement used over old mastic causes problems. They do not suit the joint, and they usually need raking out.
If you can see any of these, it’s time to have the joints looked at:
- Wind and rain getting in round a sash window
- Crumbling sand mastic round a window
- Modern sealant on a period surround
- Patchy fillers round a sash window
Rented homes near Byfleet & New Haw station change hands often, and cracked sand mastic around sash windows lets in the draughts tenants complain about.
What to look for in a quote
- What the quote includes, VAT included or not
- What the cure time is
- How much experience the applicator has
- How long the guarantee is
Why it’s worth doing now in New Haw
Gaps round a sash window let in rain and draughts. Left, water can reach the timber and the wall so renewing it early protects the window. Homes in smaller places like New Haw can face more weather, and failed outside joints let damp into walls. Inside, a split seal lets water into floors and panels just as it would anywhere.
There are no prices on our website, because the cost depends so much on the job itself. Call for a quick quote and we’ll talk you through it.
Why New Haw customers choose us
- We’re fully insured
- Over 20 years’ experience
- Sanitary silicone with an anti-fungal additive in wet areas
- We never seal over old sealant
How the visit works
On the day, we start by going over the job with you, so you know exactly what we are doing. We protect the surfaces around the joints before any work begins. Most jobs take anything from a few hours to a full day, depending on how many windows. In a smaller place like New Haw, parking is seldom the issue; lanes, gates and long drives are worth mentioning. For outside work, side access and the height of the joints help us plan.
- We check each window surround and the condition of the joint.
- The joint is raked out and cleaned.
- We fill deep gaps so the new mastic is not too thick.
- New sand mastic is applied and shaped by hand.
- We finish the mastic to a tidy line.
How to prepare
- Plan for the work area to be out of bounds to pets and children
- Tell us if parking is tricky
- Mention any sign-in or site rules at work premises
Ask for a quote
For a quick quote, get us on the phone, or email us if that’s easier. Describe what needs sealing and we will explain what’s involved before giving you a price.
Read more
What else we do in New Haw
What the job involves on each surface
Sash and case windows
A sash window’s box frame sits in the masonry opening. Sand mastic seals the joint round it.
Stone surrounds
The stone is treated with care while raking out the old mastic.