Surrey · England
Sand mastic for sash & case windows in Cobham, Surrey
Sand mastic for Cobham, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Modern sealant on a period surround
- Gaps between timber frames and stone or brick
- Wind and rain getting in round a sash window
How we handle sand mastic in Cobham
We renew sand mastic around sash windows and doors set in stone or brick. Out comes the old, loose mastic, and new mastic is applied and shaped by hand. Common call-outs are for weathered mastic on the most exposed windows and cement or filler used on old window joints that has cracked, across sash and case windows, period & listed homes and stone surrounds.
Houses in smaller places like Cobham can stand more in the open than those in a built-up town, so exposed windows and doors face the weather head on. That’s hard on the mastic around frames and sills.
The work is covered for a year after we finish. If anything isn’t right with it, phone 0345 464 0079 or email us.
- Place
- Cobham (KT11)
- Region
- Surrey
- Cover
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Your questions about sand mastic in Cobham
Can you do sand mastic in Cobham?
Yes, Cobham is within the area we cover. Our work covers London and the South East. You can call 0345 464 0079 or drop us an email and tell us what needs doing, and we will give you a clear quote.
Do you work for landlords with property near Cobham & Stoke Dabernon 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’ll give you a fixed price before we start.
How do I get a quote for sand mastic in Cobham?
We don’t publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. You’ll get a clear quote before we start.
Can new sealant go over the old?
No. Fresh sealant doesn’t stick to old sealant, and it traps any mould or water underneath. It all has to come out first.
Is it possible to take out silicone and use sand mastic instead?
Yes, we do this often. The old silicone has to come out completely so the mastic beds in well.
Is there any odour?
Some sealants have a smell while they cure. Ventilation helps.
What information do you need?
The location, the problem and the rough size of the job. Photos by email help too.
What do you put in the joint?
We choose the sealant for the joint, not the other way round. Movement, water and weather all affect the choice, and we will tell you what we are using.
Places near Cobham
More services for Cobham
Leave it or put it right?
Before painting the windows, it pays to renew the mastic. Paint over cracked mastic won’t stop the gaps, and the new mastic is traditionally left unpainted. Around Cobham, water from a failed joint in an older home can soak into timber and plaster, which is far harder to put right than the sealant itself.
Commercial jobs are quoted on the same basis as homes: 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 us?
- 12-month guarantee on every job
- Domestic, commercial and hotel work
- We’re fully insured
- 4.9 on Google from 180+ five-star reviews
See our cost guide or customer reviews.
How it works
Good joint work is mostly preparation, so that is where we spend the time. Joints are cleaned back and dried before anything new goes in. In total, it normally takes a few hours for a single window, longer for several. For a job in Cobham, we agree the time, the access and parking before the day. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- Each surround is checked first.
- The joint is raked out and cleaned.
- We fill deep gaps so the new mastic isn’t too thick.
- We point the joint with sand mastic 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
- Mention any tricky access
- Clear the area around the work
Getting a quote
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is, and add photos by email if you can.
Advice
Cobham homes and the weather
The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. With historic houses such as The Homewood (about 1.2 miles north) nearby, there’s older building stock in the area around Cobham as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
For landlords with property near Cobham & Stoke Dabernon station, cracked sand mastic around sash windows lets in the draughts tenants complain about. Managing a site like St Andrew's CofE Primary School? Then larger buildings have plenty of frames, and the mastic around each one ages.
Cobham is about 6 miles west of Epsom, in Surrey. We provide sand mastic to householders, landlords and businesses in Cobham, as part of our work across Surrey. Cobham is one of 395 towns and villages in Surrey where we work for sand mastic. London is on our list too, about 17 miles from Cobham.
Here we cover the KT11 postcode area for sand mastic. Local streets include High Street, Summerhays and Fairfield Park. If you are just outside Cobham, we cover Stoke D'Abernon (1 mile south-east), Oxshott (2 miles east), West End (2 miles north), Pachesham Park (3 miles east) and Esher (3 miles north-east). Within a short drive, we also cover Guildford (10 miles south-west), Woking (8 miles west), Camberley (14 miles west), Epsom (6 miles east), Horley (15 miles south-east) and Redhill (12 miles south-east).
Around Cobham
Typical jobs here are in homes near The Running Mare pub and West End Common. The closest station to Cobham is Cobham & Stoke Dabernon station, about 1.1 miles south of the centre. Other landmarks nearby include Elmbridge Museum (3 miles north-east) and Chessington Castle Hill (4.9 miles east). Green spaces nearby include Jubilee Wood and Claremont Lake.
How the job changes by surface
Sash and case windows
On a sash window, the mastic joint shows on the outside, so a neat, even finish matters.
Brick reveals
Loose mastic comes out and deep gaps are packed before pointing.
Work for landlords, hotels and businesses
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
Letting agents often deal with us directly. Tell us the address, the job and how access works and we will quote.
What affects the quote in Cobham
Jobs vary more than people expect. What affects the quote:
- The size of the job
- Any working-time requirements on site
- How easy the joints are to reach
- How many rooms, windows or areas are involved
Combining jobs into one visit usually makes better use of the time than several visits, so tell us about everything that needs sealing. We’ll give you a clear quote for the lot.
What we need to know
When you call or email, these details help:
- If someone has resealed it before
- Any access issues, like height or stairs
- The problem you’ve noticed
- The rough size of the job
It all starts with a short chat. Describe the problem, the location and the size of the job. Whenever you are ready, ring 0345 464 0079 or send us an email.
Do you need sand mastic in Cobham?
Over the years, sand mastic weathers. It dries out, cracks and loses its grip from the frame or the masonry.
Most people get in touch after spotting one of these:
- Draughty sash windows at the surround
- Gaps where the frame meets the masonry
- Old sand mastic that has cracked, crumbled or fallen out
- Cement or filler used on old window joints that has cracked
For an older house near a landmark such as Church of St Andrew, the joint between an old wall and a newer frame is generally the first place rain gets in.
What your quote should include
- What happens if the job turns out different
- What guarantee comes with the work
- What preparation is included
- Whether you can choose the colour
When something else is needed
In fairness, some problems need a different trade:
- Putty and glazing repairs
- Sash cords, weights and draught-proofing of the sashes
- Planning or listed building consent (your local planning authority decides)
Not sure which it is? You can ring 0345 464 0079 or send us an email and we will tell you honestly before booking.
Joints and surfaces we work on
- Period & listed homes
- Timber door frames
- Stone surrounds
- Tenement windows
- Sash and case windows
- Brick reveals