Buckinghamshire · England
Sand mastic for sash & case windows in Chalkshire, Buckinghamshire
Professional sand mastic in and around Chalkshire, with every bit of old sealant taken out first and a 12-month guarantee.
- Cement or filler used on old window joints that has cracked
- Modern sealant on a period surround
- Draughts and rain around sash boxes
About our sand mastic in Chalkshire
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 replace one with the other. We work on stone surrounds, period & listed homes and sash and case windows, and common reasons people get in touch are mastic that needs renewing before redecorating and wind and rain getting in round a sash window.
In a village or hamlet like Chalkshire, older cottages and farmhouses often have timber windows set in stone or brick. Not every older frame suits a modern silicone bead, and sometimes a traditional sand mastic is the better choice.
We guarantee the work for a year. If something isn’t right with it in that time, tell us and we’ll put it right.
- Where
- Chalkshire (HP17)
- Wider area
- Buckinghamshire
- Cover
- A year, on every job
- Price
- A clear price before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Work for landlords, hotels and businesses
Housing providers, facilities teams and property managers book us too in Chalkshire and across Buckinghamshire. Several sites can be quoted together.
From a single let to a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
Surface by surface
Brick reveals
Sand mastic is also used where timber frames meet brick. It suits older brickwork.
Tenement and terrace windows
In shared buildings, the windows may be part of a wider repair, so check who is responsible first.
Chalkshire: your questions answered
Can you help a landlord with a rental near Little Kimble station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. Just phone 0345 464 0079 or drop us an email with the address and what needs doing, and we will send you a clear quote.
Do you cover smaller places like Chalkshire?
Yes, Chalkshire is covered. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Do you guarantee sand mastic work?
You get our one-year guarantee on every job.
Can new sealant go over the old?
No, because it fails. The old sealant always comes out first, so the new joint bonds to clean surfaces.
What do you put in the joint?
Quality sealants from brands including Arbo and Everbuild, chosen to suit the joint. We’ll tell you what we’re using and why.
Are you ARBOMaster approved?
Yes. We are an ARBOMaster approved applicator, the approved applicator scheme for Arbo sealants.
How long does sand mastic take to harden?
The surface skins quite quickly, then hardens over a longer period. The weather and joint depth both affect it.
How long does the job take?
A typical job takes a few hours for a single window, longer for several. We will confirm how long when we quote.
Keeping the joints in good condition
Joint life depends on how it’s used and looked after. We suggest:
- Ask us before painting near the mastic
- Check the mastic when you check the paintwork
- Ask the planning authority about consent for listed or conservation-area homes
- Clear gutters so water does not pour onto the windows
Avoid sealing over the mastic with silicone. If anything cracks, get it looked at rather than patching it.
An open joint round the box lets weather through. Left, the gap tends to get bigger.
Honest limits
We’ll always be straight with you, so here’s what sealant can’t fix:
- Decisions on consent for listed homes
- Sash cords, weights and draught-proofing of the sashes
- Cracked or broken glass
If in doubt, phone 0345 464 0079 or send us an email and we will say what we think.
What we seal
- Sash and case windows
- Brick reveals
- Tenement windows
- Timber door frames
- Period & listed homes
- Stone surrounds
Frames and glazing around Chalkshire
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Schools such as John Colet School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s. In the older streets around Church of St Peter and St Paul, the joint between an old wall and a newer frame is normally the first place rain gets in.
Chalkshire is about 4 miles south of Aylesbury, in Buckinghamshire. For sand mastic in and around Chalkshire, it’s easy to get a quote: please call 0345 464 0079 or send us an email. We cover Buckinghamshire from our Crawley base, Chalkshire included. Our Buckinghamshire coverage runs to 263 places, Chalkshire among them. Oxford is on our list too, about 19 miles from Chalkshire.
Postcode districts we cover here for sand mastic: HP17. Nearby, we also carry out sand mastic in Terrick (1 mile north), Butler's Cross (1 mile south), Nash Lee (1 mile north), Ellesborough (1 mile south-west) and Coombe (1 mile south). We also work in nearby towns such as Aylesbury (4 miles north), High Wycombe (9 miles south), Chesham (8 miles south-east), Marlow (13 miles south), Amersham (10 miles south-east) and Beaconsfield (12 miles south-east).
Near you in Chalkshire
In Chalkshire, that means homes and buildings near The Russell Arms. The nearest railway station is Little Kimble station, roughly 1.3 miles south-west of the centre. Other landmarks nearby include Little Kimble Motte (1.1 miles south-west) and Stoke Mandeville Hospital (2.7 miles north). Green spaces nearby include Brush Hill Local Nature Reserve and Coombe Hill.
Nearby places to Chalkshire
Other services in Chalkshire
Common problems we fix in Chalkshire
Age is the main cause. Sand mastic is a maintenance item like any pointing and how long it lasts depends on the weather it faces.
The most common problems we see are:
- Failed mastic on an exposed elevation
- Modern sealant on a period surround
- Old cement repairs round a window that have failed
- Old sand mastic that has cracked, crumbled or fallen out
Letting a property close to Little Kimble station? Then older sash windows in a rental need their mastic kept sound to keep the weather out.
What to look for in a quote
- How the surfaces are prepared before sealing
- What the quote includes, VAT included or not
- Whether you can choose the colour
- Who turns up on the day
How we quote for sand mastic
For a quick quote, just ask. The main things that affect it are:
- The number and length of the joints
- How much old sealant there is and how hard it is to remove
- Any working-time requirements on site
- Whether the work is at height
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.
What we need to know
To help us quote quickly, please include:
- If someone has resealed it before
- Any access issues, like height or stairs
- Where the job is, and your postcode
- Roughly how big the job is
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we will talk you through what we’d do. When it suits you, phone 0345 464 0079 or email us.
What happens on the day
We work through the job in order: protection first, then preparation, sealing and a tidy-up. For most jobs that takes a few hours per window, depending on the condition of the joints and we leave things clean and tidy. In a small place like Chalkshire, access is generally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First we agree which joints need doing.
- We remove the old, loose mastic.
- Deep gaps are packed so the mastic sits at the right depth.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
How to prepare
- For business premises, tell us about site rules or sign-in
- Mention any leaks or damp you’ve noticed
- Move anything stored near the joints
How to get a quote
Asking for a quote is easy: tell us what needs doing and where and its rough size. Photos by email help us understand the job, and we will take it from there.