Buckinghamshire · England
Chesham Bois Sand Mastic
Sand mastic across Chesham Bois and nearby, with old sealant always removed completely and a one-year guarantee.
- Gaps between timber frames and stone or brick
- Draughty sash windows at the surround
- Mastic worn away on windows facing the weather
Sand mastic in Chesham Bois
We work across Chesham Bois renewing sand mastic on sash windows and doors. Each joint is raked out, prepared and pointed by hand for a neat, traditional finish. Common call-outs are for gaps between timber frames and stone or brick and window mastic to renew ahead of painting, across stone surrounds, period & listed homes and tenement windows.
In a smaller place like Chesham Bois, some walls face open ground and catch the full force of the weather, so exposed windows and doors face the weather head on. That is hard on the mastic around frames and sills.
There’s a 12-month guarantee on every job.
- Location
- Chesham Bois (HP6, HP5)
- Region
- Buckinghamshire
- Guarantee
- 12 months on all our work
- Quotes
- A clear price before we start
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
What the job involves on each surface
Tenement and terrace windows
In shared buildings, the windows may be part of a wider repair, so check who is responsible first.
Period and listed homes
Materials matter on listed and conservation-area homes. Like-for-like sand mastic is normally favoured.
Nearby places to Chesham Bois
More services for Chesham Bois
Work for landlords, hotels and businesses
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance that we can handle for you.
Hotels need rooms back in use, so we plan the work room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
What affects the quote in Chesham Bois
Your quote is based on your job. We take into account:
- Mould in or behind the old joints
- The size of the job
- How many areas need sealing
- Whether old sealant or filler has to be cut out
What it costs depends on the amount of work, how much old material has to come out and how easy the joints are to reach. You will have a clear quote before any work starts.
Helping us quote
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- Whether it has been sealed before
- Where the property is
- The rough size of the job
- If it’s domestic, commercial or a hotel
If you are in Chesham Bois and need sand mastic, ring 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
DIY versus a professional finish
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly, so tell us about it when you ask for a quote.
FAQs for Chesham Bois
Do you work for landlords with property near Amersham station?
Yes. We work for landlords and agents as well as homeowners, and several properties can be quoted together. You can phone 0345 464 0079 or drop us an email with the details for a clear quote.
Is Chesham Bois in your area for sand mastic?
Yes. Our work covers London and the South East, and Chesham Bois is part of that. You can call 0345 464 0079 or drop us an email and let us know what needs doing, and we’ll give you a clear quote.
Can I add another job to the visit?
Yes, we can. More than one area can be quoted together.
What guarantee comes with the work?
You get our one-year guarantee on every job.
How do I get a quote for sand mastic in Chesham Bois?
We do not 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 any work starts.
What do you need from me for a quote?
Only a few details: the address or postcode, what’s wrong and any access issues. After that, simply phone 0345 464 0079 or email us.
Is it possible to paint over sand mastic?
The usual advice is to leave sand mastic unpainted. If you are redecorating the window, ask us first and we will talk you through it.
How long does the job take?
As a guide, most jobs take a few hours per window, depending on the condition of the joints. Bigger jobs take longer, and we’ll say how long yours will take.
Frames and glazing around Chesham Bois
With historic houses such as Chenies Manor House (about 3.2 miles east) nearby, there’s older building stock in the area around Chesham Bois as well as newer homes. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic. 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.
Letting a property close to Amersham station? Then any sash windows need sound mastic to keep draughts and rain out. For site and facilities teams at buildings such as Elangeni School, the mastic around its windows and doors needs looking after like any other building’s.
Chesham Bois is about 1 mile north of Amersham, in Buckinghamshire. From the centre of Chesham Bois to the outskirts, we cover sand mastic for every kind of property, from flats and houses to offices and hotels. Our area takes in 263 places across Buckinghamshire, large and small. For nearby work, see our Reading page, about 23 miles away.
We work across HP6 and HP5 for sand mastic and the streets around it. Sand mastic is available to properties on Bois Lane, Green Lane and North Road and the roads around them. Close by, we work in Amersham (1 mile south), Amersham on the Hill (1 mile south), Waterside (1 mile north), Hyde Heath (2 miles west) and Woodrow (3 miles south-west). We also work in nearby towns such as Aylesbury (13 miles north-west), High Wycombe (7 miles south-west), Marlow (11 miles south-west), Beaconsfield (6 miles south), Chalfont St Peter (6 miles south) and Elmhurst (13 miles north-west).
Local landmarks in Chesham Bois
Around Chesham Bois, our work takes us to homes and buildings near Dr Challoner's Grammar School, The Boot and Slipper pub and Home Tuition Service and the streets around them. The nearest railway station is Amersham station, about 0.8 miles south of the centre. Other landmarks nearby include Amersham Fair Organ Museum (0.6 miles south-east) and Amersham Hospital (1.7 miles south-west). Green spaces nearby include Sands Bank.
Do you need sand mastic in Chesham Bois?
Over the years, sand mastic weathers. It hardens, cracks and starts to come away from the frame or the masonry.
Common reasons people contact us are:
- Gaps where the frame meets the masonry
- A silicone bead on a sash window that spoils the look
- Crumbling sand mastic round a window
- Patchy fillers round a sash window
For an older house near a landmark such as Church of St Leonard, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
What to look for in a quote
- How long to leave it before use
- How the colour is chosen
- What product goes in the joint
- Whether they seal over old material or remove it
Why it’s worth doing now in Chesham Bois
Filling over old, loose mastic doesn’t last. We remove the loose material first so the new work lasts. Homes in smaller places like Chesham Bois can face more weather, and failed outside joints let damp into walls. Inside, a split seal lets water into floors and panels just as it would anywhere.
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, along with when we can work on site. Call for a quick quote and we’ll go through it with you.
Why us?
- We leave the area clean and tidy
- Any old sealant cut out fully, not covered over
- ARBOMaster approved applicator
- Experience in homes, commercial sites and hotels
Take a look at our cost guide and what customers say.
How it works
There’s no need to move everything out, just the space around the work. We protect the rest, and the job takes anything from a few hours to a full day, depending on how many windows for a typical job. In a smaller place like Chesham Bois, parking is seldom the issue; lanes, gates and long drives are worth mentioning. For outside work, side access and the height of the joints help us plan.
- We look at the surrounds with you and agree the joints to renew.
- 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.
- We dress the finish so it sits neatly against the masonry.
How to prepare
- Mention any tricky access
- Tell us about any water getting in
- On commercial sites, let us know about site rules
Getting a quote
We do not publish a price list, as no two jobs are quite the same. Instead, we send you a clear quote for your job. To arrange one, call 0345 464 0079 or email us.