Surrey · England
Sand mastic for sash & case windows in Chilworth, Surrey
Sand mastic across Chilworth and nearby, with every bit of old sealant taken out first and a 12-month guarantee.
- Silicone on a period window that looks wrong
- Mastic worn away on windows facing the weather
- Cement or filler used on old window joints that has cracked
Landlords, agents and businesses in Chilworth
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
We also work for property managers and facilities teams in Chilworth and across Surrey. Several sites can be quoted together.
Sand mastic in Chilworth
Traditional burnt sand mastic that sits naturally against stone and brick. It’s a good fit for period properties where a modern sealant bead would stand out. We work on stone surrounds, timber door frames and brick reveals, and people most often call us about crumbling sand mastic round a window and patchy fillers round a sash window.
Outdoor sealant needs dry, clean surfaces, so work on frames around Chilworth is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
Each job carries a 12-month guarantee, whatever its size.
- Place
- Chilworth (GU4)
- Wider area
- Surrey
- Guarantee
- A year, on every job
- Quotes
- A clear price before work begins
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Surface by surface
Tenement and terrace windows
Upper-floor windows need access planning. Tell us the height and we will confirm what’s needed.
Period and listed homes
Period homes look their best with traditional materials.
What sand mastic looks like in Chilworth
With historic houses such as Chilworth Manor (about 0.4 miles north) nearby, there’s older building stock in the area around Chilworth as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic. 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.
For an older house near a landmark such as Church of St Thomas, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. Schools such as Chilworth CofE (Aided) Infant School are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages.
Chilworth is about 3 miles south-east of Guildford, in Surrey. From the centre of Chilworth to the outskirts, we cover sand mastic for every kind of property. Chilworth is one of 395 places in Surrey we cover. Crawley is on our list too, around 17 miles away.
Every address in GU4 is covered for sand mastic, from the main roads to the quietest streets. You will find streets such as Old Manor Gardens, Redwood Grove and Blacksmith Lane, all of which we cover. Main roads around Chilworth include the A248, so getting to you is simple. Close by, we work in Blackheath (1 mile south-east), East Shalford (1 mile west), Shalford (1 mile west), Broadford (2 miles west) and Abbotswood (2 miles north-west). We also work in nearby towns such as Guildford (3 miles north-west), Woking (7 miles north), Camberley (12 miles north-west), Epsom (14 miles north-east), Farnham (11 miles west) and Ewell (15 miles north-east).
Around Chilworth
Locally, jobs take us to homes and businesses close to The Percy Arms, St Peter's Catholic School and Shalford Mill. Chilworth has its own railway station: Chilworth station. Well-known places in the area include Guildford House (2.2 miles north-west) and Guildford Castle (2.1 miles north-west). For a walk, there’s Silent Pool and St Martha's Hill.
Signs you need sand mastic in Chilworth
Scraping and sanding before painting can loosen old mastic. It’s often found when windows are being prepared for paint.
These are the problems we’re asked about most:
- Silicone on a period window that looks wrong
- Gaps round a timber door in stone or brick
- Crumbling sand mastic round a window
- Gaps where the frame meets the masonry
Letting a property close to Chilworth station? Then older sash windows in a rental need their mastic kept sound to keep the weather out.
Comparing quotes
- Whether the sealant suits the joint
- How the surfaces are prepared before sealing
- Is the old sealant removed completely?
- Who does the work, and how experienced they are
Towns and villages near Chilworth
More services for Chilworth
Common questions in Chilworth
Do you work for landlords with property near Chilworth station?
Yes. We work for letting agents and landlords as well as householders, and several properties can be quoted together. You can phone 0345 464 0079 or send us an email with the details for a clear quote.
Will you come out to Chilworth?
Yes, smaller places are covered as well as towns. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Is it possible to paint over sand mastic?
Sand mastic is normally left unpainted, as guidance on traditional windows advises. Ask us before decorating.
Is it messy?
Not at all. The area is protected while we work and cleaned up afterwards.
What sealant do you use?
It depends on the joint: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. Brands we use include Arbo and Everbuild.
Can you seal over the old sealant?
No, because it fails. The old sealant always comes out first.
Are you insured?
Yes. We are fully insured.
How long will you be here?
It depends on the size of the job, but most jobs take a few hours per window, depending on the condition of the joints. We will give you a better idea when we quote.
What affects the cost of sand mastic
For a quick quote, just ask. The main things that affect it are:
- The number and length of the joints
- The number of rooms or windows
- How much old sealant there is and how hard it is to remove
- The type of sealant required
No two jobs are quite the same, so we quote each one individually. Size, access and the product the joint needs all make a difference.
Helping us quote
Photos help, but a description is a good start. Please mention:
- The type of property
- Where the job is, and your postcode
- How we’d reach the joints
- How many joints, rooms or windows are involved
We do not publish a price list. Instead, your job gets its own clear quote. To get started, ring 0345 464 0079 or send us an email.
How the visit works
Our applicators work methodically: protect, prepare, seal, tidy. Typically it takes anything from a few hours to a full day, depending on how many windows, and the area is left clean. Somewhere as small as Chilworth, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We check each window surround and the condition of the joint.
- The joint is raked out and cleaned.
- Large voids are packed out.
- New sand mastic is applied and shaped by hand.
- The finish is dressed neatly.
Before we arrive
- Try not to wet indoor joints just before the visit
- Tell us if parking is tricky
- Let us know about earlier repairs to the joints
Get a quote
Getting a quote is simple: let us know the job and the location, and roughly how big it is. A few photos by email make the job easier to understand, and we will come back to you with a quote.
Advice
What happens if it’s left?
Cement-based fillers and modern sealants do not always suit a period surround. Sand mastic matches what was there and that can be important for listed homes. Around Chilworth, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
Rather than a set price list, we price the job in front of us: the amount of work, the old material and the access. The price is agreed before we begin.
Why Chilworth customers choose us
- ARBOMaster approved applicator
- Arbo and Everbuild products
- Over 20 years’ experience
- Old sealant always removed completely
Read our cost guide and our reviews.
Can I do it myself?
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.