Buckinghamshire · England
Sand mastic for sash & case windows in Great Kimble, Buckinghamshire
Sand mastic across Great Kimble and nearby, with old sealant always removed completely.
- Mastic that needs renewing before redecorating
- Silicone on a period window that looks wrong
- Old sand mastic that has cracked, crumbled or fallen out
What we do, step by step
On the day, there’s very little for you to do. Show us the job and we will take it from there. The job generally takes a few hours for a single window, longer for several from start to finish. Somewhere like Great Kimble needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- Each surround is checked first.
- We rake out the old mastic and clean the joint.
- We fill deep gaps so the new mastic is not too thick.
- New sand mastic is applied and shaped by hand.
- The finish is dressed neatly.
How to prepare
- Tell us about any water getting in
- Let us know about parking restrictions
- For indoor joints, keep the area dry beforehand if you can
Get a quote
Asking for a quote is easy: let us know the job and the location and its rough size. A few pictures by email make the job easier to understand, and we’ll come back to you with a quote.
Related advice
Sand mastic for homes and businesses in Great Kimble
A silicone bead around a sash window can look out of place and doesn’t suit the building. Sand mastic gives a finish that matches the age of the house and we can swap the silicone for it. Typical jobs include mastic worn away on windows facing the weather and mastic dropping out of the joint, across stone surrounds, brick reveals and period & listed homes.
Outdoor sealant needs dry, clean surfaces, so work on frames around Great Kimble is planned for dry weather. Tell us about access to every side of the house, including upper-floor windows.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Where
- Great Kimble (HP17)
- Region
- Buckinghamshire
- Guarantee
- 12 months on all our work
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Sand mastic in Great Kimble: local notes
Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Managing a site like Great Kimble Church of England School? Then its window and door frames need their mastic kept sound, just like a home’s. For an older house near a landmark such as Church of St Nicholas, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Great Kimble is about 5 miles south of Aylesbury, in Buckinghamshire. Anywhere in HP17, our applicators can take on sand mastic. We cover 263 towns and villages across Buckinghamshire, from the larger towns to small villages. Oxford is on our list too, around 18 miles away.
Here we cover the HP17 postcode area for sand mastic. We cover properties on Bridge Street, Hill View and Lower Icknield Way. Close by, we work in Little Kimble (1 mile north-east), Askett (1 mile south-west), Lower Cadsden (1 mile south), Meadle (1 mile west) and Whiteleaf (1 mile south). Within a short drive, we also cover Aylesbury (5 miles north), High Wycombe (9 miles south), Chesham (9 miles east), Marlow (12 miles south), Amersham (10 miles south-east) and Beaconsfield (12 miles south-east).
What’s near Great Kimble
Around Great Kimble, our work takes us to homes and buildings near The Swan pub and Princes Risborough School and the streets around them. Great Kimble has its own railway station: Little Kimble station. Other landmarks nearby include National Paralympic Heritage Centre (3.6 miles north) and Stoke Mandeville Hospital (3.4 miles north). For a walk, there’s Beacon Hill and Brush Hill Local Nature Reserve.
Different surfaces, different methods
Brick reveals
An open joint at a brick reveal lets weather in. New mastic seals the gap.
Timber door frames
Sand mastic is used round timber door frames too. The method is the same as for windows.
Work for landlords, hotels and businesses
In hotels, rooms out of use cost money, so we plan the work room by room. Hotel work is part of what we do, alongside homes and businesses.
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.
Common problems we fix in Great Kimble
Over the years, sand mastic weathers. It hardens, cracks and starts to come away from the frame or the masonry.
The most common problems we see are:
- Draughty sash windows at the surround
- A silicone bead on a sash window that spoils the look
- Window mastic to renew ahead of painting
- Cracked mastic round a front door frame
For landlords with property near Little Kimble station, any sash windows need sound mastic to keep draughts and rain out.
Comparing quotes
- Is VAT in the price?
- Whether they seal over old material or remove it
- What preparation is included
- Who does the work, and how experienced they are
What sealant work cannot fix
Honest advice matters more to us than a booking, so here’s what new sealant will not do:
- Damaged stone surrounds
- Rotten sashes, sills or window boxes (a joiner’s job)
- Putty and glazing repairs
If you’re not sure, just call 0345 464 0079 or email us and we will give you a straight answer.
Joints and surfaces we work on
- Timber door frames
- Brick reveals
- Tenement windows
- Period & listed homes
- Stone surrounds
- Sash and case windows
What happens if it’s left?
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. Older cottages and farmhouses around Great Kimble can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
We don’t show prices on the website, because the cost depends so much on the job itself. Call for a quick quote.
Why book with us
- More than 20 years in sealant work
- Domestic, commercial and hotel work
- Any old sealant cut out fully, not covered over
- Neat joints and a tidy finish
Read our cost guide or our reviews.
Towns and villages near Great Kimble
Also in Great Kimble
Common questions in Great Kimble
Do you work for landlords with property near Little Kimble station?
Yes, landlords and agents are among the people we work for. You can ring 0345 464 0079 or email us with the details for a clear quote.
Can you do sand mastic in Great Kimble?
Yes. We work across London and the South East, and Great Kimble is part of that. You can phone 0345 464 0079 or send us an email and let us know what needs doing.
Do you do commercial work?
Yes. Commercial and hotel work is a large part of what we do, as well as homes. We can talk about working times when we quote.
Where are you based?
We work from Crawley. We cover Great Kimble and the rest of Buckinghamshire, along with the rest of our area.
Do you offer different sealant colours?
In most cases you can choose. We’ll tell you which colours the right product comes in.
What exactly is sand mastic?
Sand mastic is a traditional material for pointing round windows and doors. It’s made with sand and a linseed-oil-based binder.
Are you insured?
Yes. We’re fully insured, and we have been doing sealant work for more than 20 years.
Is it possible to paint over sand mastic?
It’s traditionally left unpainted, as guidance on traditional windows advises. Ask us before decorating.
Looking after it afterwards
Once the sealant has cured, a few habits help it last:
- Look over the window mastic once a year
- Ask the planning authority about consent for listed or conservation-area homes
- Don’t run silicone over sand mastic
- Keep sills and gutters clear so water drains away
Keep gutters and sills clear so water runs away from the surround. Constant wetting wears the mastic faster.
Crumbling mastic lets rain into the joint. That water can reach the timber frame and the wall so early renewal protects both.