Surrey · England
Sand mastic for sash & case windows in Coldharbour, Surrey
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for Coldharbour, backed by a 12-month guarantee. Call for a quick quote.
- Modern sealant on a period surround
- Gaps between timber frames and stone or brick
- Old cement repairs round a window that have failed
Sand mastic in Coldharbour
Our applicators renew the sand mastic around sash and case windows and doors set in stone or brick. The old mastic is raked out, the joint is prepared and new mastic is shaped by hand. We work on sash and case windows, timber door frames and stone surrounds, and common reasons people get in touch are gaps where the frame meets the masonry and gaps round a timber door in stone or brick.
Somewhere as small as Coldharbour, older homes often have timber frames set in stone or brickwork. Older buildings like these don’t always suit modern silicone, so the sealant has to be chosen to suit the building.
We guarantee the work for a year. If something isn’t right with it in that time, tell us and we will put it right.
- Location
- Coldharbour (RH5)
- Wider area
- Surrey
- Cover
- A year, on every job
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Surface by surface
Period and listed homes
Period homes look their best with traditional materials.
Sash and case windows
The box of a sash and case window sits in the stone or brick opening. The gap round it is pointed with sand mastic.
Signs you need sand mastic in Coldharbour
Rain on the window surround works into any crack and pushes it out. Windows facing the weather tend to go first.
It’s worth asking for a quote if you see:
- Draughts and rain around sash boxes
- Modern sealant on a period surround
- Cracked mastic round a front door frame
- Old cement repairs round a window that have failed
Rented homes near Holmwood station change hands often, and older sash windows in a rental need their mastic kept sound to keep the weather out.
Questions to ask before you book
- What the quote includes, VAT included or not
- What product goes in the joint
- The length of the guarantee
- What happens if they find a problem under the old sealant
Towns and villages near Coldharbour
More services for Coldharbour
Why act early in Coldharbour
Silicone might seem the quicker option, but it can look wrong on a period surround. Sand mastic is the traditional material and blends with the stone or brick. Older cottages and farmhouses around Coldharbour can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether the work is at height. We take all of that into account in your quote.
What you get with us
- Fully insured
- Every job guaranteed for a year
- Anti-fungal silicone where joints get wet
- Neat joints and a tidy finish
Read what affects the cost or customer reviews.
Frames and glazing around Coldharbour
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.
Homes close to Christ Church include some older properties, and the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Coldharbour is about 4 miles south of Dorking, in Surrey. For sand mastic in and around Coldharbour, it’s easy to get a quote: please call 0345 464 0079 or drop us an email. We cover Surrey from our Crawley base, Coldharbour included. Coldharbour is one of 395 places in Surrey we cover. We also work in Crawley, about 9 miles from Coldharbour.
Jobs for sand mastic in RH5 is quoted and booked the same way as anywhere else. We also cover Abinger Bottom (2 miles north-west), South Holmwood (2 miles north-east), Holmwood Corner (2 miles east), Friday Street (2 miles north-west) and Beare Green (2 miles east). We also work in nearby towns such as Guildford (10 miles north-west), Woking (13 miles north-west), Epsom (11 miles north), Horley (8 miles east), Redhill (9 miles north-east) and Ewell (13 miles north).
Landmarks near Coldharbour
We work in homes and buildings around Wotton and Abinger Commons and Plough Inn, among other places. The nearest railway station is Holmwood station, roughly 1.6 miles east of the centre. A little further out are Mesolithic Museum (2.6 miles north-west) and Abinger Castle (2.6 miles north-west). Open spaces near Coldharbour include Vann Lake and Leith Hill.
Keeping the joints in good condition
How long the joints last depends on use and care. Here’s what we suggest:
- Take care around the mastic when scraping paint
- Find out about consent before window work on a listed home
- Check the mastic when you check the paintwork
- Keep modern sealant off the mastic
When preparing windows for paint, take care around the mastic. Hard scraping can loosen it.
Sound mastic protects the frame. Once it fails, water can sit against the timber and timber that stays wet can rot.
What we do, step by step
The work is kept neat and contained to the joints we are treating, so you can carry on as normal. Expect the work to take anything from a few hours to a full day, depending on how many windows. Somewhere as small as Coldharbour, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- Each surround is checked first.
- The joint is raked out and cleaned.
- Large voids are packed out.
- New sand mastic is applied and shaped by hand.
- We finish the mastic to a tidy line.
Preparing for the visit
- Mention any sign-in or site rules at work premises
- Tell us about any previous sealing or DIY attempts
- Let us know if you’ve seen damp or leaks
Getting a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and add pictures by email if you can.
Related advice
Coldharbour: your questions answered
Do you work for landlords with property near Holmwood station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can call 0345 464 0079 or drop us an email with the details for a clear quote.
Do you cover smaller places like Coldharbour?
Yes, we do. 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.
What should I tell you?
A short description and the location, with photos by email if possible. We will ask anything else we need to know.
How long does sand mastic take?
A typical job takes anything from a few hours to a full day, depending on how many windows, including the preparation. We’ll confirm how long when we quote.
Can you quote for more than one area?
Of course. Combining jobs makes good use of the visit.
Do the sealants smell?
That depends on the sealant. Some products have a noticeable smell, others very little, and any smell fades as they cure.
Can you replace silicone on a period window with sand mastic?
Yes. We remove the silicone and clean the joint, then point it with sand mastic.
What sealant do you use?
Quality sealants from brands including Arbo and Everbuild, picked for each joint. We explain the product when we quote.
For landlords and businesses
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
From a single let to a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
What affects the quote in Coldharbour
There’s no set price list, because no two jobs are the same. What we look at:
- When we can work, for business premises
- Any mould that needs treating
- Which sealant suits the joint
- Access and height
Instead of a standard rate, we look at what your job involves: the amount of work, the old material and the access. The price is agreed before we begin.
Helping us quote
To help us quote quickly, please include:
- A few photos by email, if you can
- Whether it’s a home or a business
- What the problem is, such as mould, gaps, leaks or cracking
- How we’d reach the joints
Call for a quick quote, or send an email if you’d rather. Describe what needs sealing and we’ll explain what’s involved.