Surrey · England
Sand mastic for sash & case windows in Great Bookham, Surrey
Window and door surrounds in Great Bookham need attention? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Mastic worn away on windows facing the weather
- Patchy fillers round a sash window
- Draughty sash windows at the surround
About our sand mastic in Great Bookham
Across Great Bookham, we renew sand mastic around sash and case windows. Each joint is raked out, prepared and pointed by hand for a neat, traditional finish. We work on sash and case windows, brick reveals and period & listed homes, and the jobs we see most are crumbling sand mastic round a window and failed mastic on an exposed elevation.
In a smaller place like Great Bookham, some walls face open ground and catch the full force of the weather. That’s hard on the mastic around frames and sills.
A 12-month guarantee comes with the work, just as it does everywhere we cover.
- Place
- Great Bookham (KT23, KT22)
- Region
- Surrey
- Cover
- One year on every job
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
What we do, step by step
Most of a good job is in the preparation, so that is where we spend the time. Every joint is cleaned and dried before new material goes in. In total, it normally takes a few hours per window, depending on the condition of the joints. Parking around Great Bookham is generally easier than in a town centre, but mention any lanes, gates or long drives. For outside work, side access and the height of the joints help us plan.
- First we agree which joints need doing.
- Old mastic and any loose material are raked out.
- We pack any deep voids first.
- The sand mastic is mixed and pressed into the joint by hand.
- We dress the finish so it sits neatly against the masonry.
Preparing for the visit
- Let us know about parking restrictions
- Keep children and pets away from the work area
- Tell us about any water getting in
Ask for a quote
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we will explain how we’d tackle it. Whenever you are ready, phone 0345 464 0079 or email us.
Related advice
Also near Great Bookham
What else we do in Great Bookham
Windows and doors in Great Bookham
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. With historic houses such as Polesden Lacey (about 1.6 miles south) nearby, there’s older building stock in the area around Great Bookham as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
Homes close to Church of St Nicolas include some older properties, and replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. Managing a site like The Dawnay School? Then larger buildings have plenty of frames, and the mastic around each one ages.
Great Bookham is about 6 miles south-west of Epsom, in Surrey. We carry out sand mastic for homes and businesses in Great Bookham, as part of our work across Surrey. Our area takes in 395 places across Surrey, large and small. We also work in Crawley, around 14 miles away.
Our applicators cover all of KT23 and KT22 for sand mastic. Sand mastic is available to properties on High Street, Church Road and Beeches Drive and the roads around them. We also cover the places around Great Bookham: Fetcham (1 mile north-east), Little Bookham (1 mile south-west), Leatherhead (2 miles north-east), Mickleham (2 miles east) and Westhumble (3 miles south-east). Larger places within reach include Guildford (9 miles west), Woking (9 miles west), Epsom (6 miles north-east), Horley (11 miles south-east), Redhill (9 miles east) and Ewell (7 miles north-east).
Landmarks near Great Bookham
In Great Bookham, that means homes and buildings near Howard of Effingham School, Manor House School and The Old Crown pub and the streets around them. Great Bookham’s nearest station is Bookham station, roughly 0.8 miles north-west of the centre. Well-known places in the area include Headley Court (4.1 miles east) and Betchworth Castle (4.4 miles south-east). The countryside around Great Bookham includes Box Hill and Jubilee Wood.
Great Bookham: your questions answered
Can you do sand mastic in Great Bookham?
Yes, Great Bookham is within the area we cover. We work across London and the South East. You can phone 0345 464 0079 or send us an email and tell us what needs doing.
Can you help a landlord with a rental near Bookham station?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or send us an email with the address and a few details, and we’ll give you a fixed price before any work starts.
Can I add another job to the visit?
Of course. Combining jobs makes good use of the visit, so mention them when you ask for a quote.
Do you work for hotels and businesses?
Yes. We’ve worked for hotels, offices and other businesses.
Do you offer different sealant colours?
Most of the time, yes. We will explain which colours are available and agree one before work begins.
How much does sand mastic cost in Great Bookham?
Every job is different, so each one gets its own quote. For a quick quote, ring 0345 464 0079 or drop us an email with a short description of the job.
Do you have insurance?
Yes. Full insurance covers our work.
Do I need permission for sand mastic on a listed building?
Check with your local planning authority. They’ll tell you if consent is needed for work to your windows.
Looking after it afterwards
After the cure time, these simple habits help:
- Have rotten timber repaired before new mastic goes in
- Find out about consent before window work on a listed home
- Avoid heavy scraping on the mastic joint
- Inspect the joints round the windows every year or so
Make sure water drains away from the window surround. Constant wetting wears the mastic faster.
Small cracks are a sign the mastic is ageing. It’s easier to renew it before it drops out.
Leave it or put it right?
New sash windows are a major, costly change, and in listed buildings it may need consent. Where the frames are in good order, new mastic seals the surround. Around Great Bookham, water from a failed joint in an older home can soak into timber and plaster, and that is a much bigger job than renewing the sealant.
What it costs depends on the size of the job, how much old material has to come out and how easy the joints are to reach. We give a clear quote before work begins.
Why book with us
- 180+ five-star Google reviews
- A 12-month guarantee on all work
- Any old sealant cut out fully, not covered over
- Over 20 years’ experience
Take a look at how sealant jobs are priced or our reviews.
How we quote for sand mastic
Jobs vary more than people expect. What affects the quote:
- The size of the job
- When we can work, for business premises
- Whether there’s mould to deal with
- Access and height
Every job is a little different, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all play a part.
Asking for a quote
There’s no need for technical detail. It helps if you can tell us:
- Whether it’s a home or a business
- What’s wrong with the joints now
- The rough size of the job
- Any access issues, like height or stairs
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and add photos by email if you can.
What we are called out for in Great Bookham
Shallow joints are a common cause. Mastic that’s too thin cracks and drops out so we make sure the new mastic is the right thickness.
People normally contact us when they notice one of these:
- Cracked mastic round a front door frame
- Silicone on a period window that looks wrong
- Old cement repairs round a window that have failed
- Crumbling sand mastic round a window
Rented homes near Bookham station change hands often, and any sash windows need sound mastic to keep draughts and rain out.
Questions to ask before booking
- Whether they’re fully insured
- What product goes in the joint
- What happens if they find a problem under the old sealant
- What preparation is included
What the job involves on each surface
Period and listed homes
On a listed home or in a conservation area, the right material matters. Sand mastic is often the preferred finish.
Tenement and terrace windows
In shared buildings, the windows may be part of a wider repair, so check who is responsible first.
DIY versus a professional finish
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, then guaranteed for a year.
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.