Chesham Bois mastic sealing
Mastic sealing for building owners, managing agents and housing associations in Chesham Bois. CHAS accredited and fully insured, with a 12-month guarantee.
- Movement joints with sealant missing
- Damaged joints in communal entrances and corridors
- Occupiers reporting cold air round windows
Need mastic sealing in Chesham Bois?
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
About our mastic sealing in Chesham Bois
We work for building owners, landlords with commercial or block portfolios, managing agents and housing associations. Many prefer a planned programme to one-off visits, with each block quoted and scheduled in turn. If you’re dealing with worn sealant at communal door frames and draughts at frames across a block, we can put it right, on communal kitchens and washrooms, balcony and threshold joints and external wall and movement joints alike. A specialist sealant contractor works differently from a general builder: in Chesham Bois, that means joint design, primers and backing rod as standard.
Older buildings and conversions around places like Chesham Bois mix old masonry with newer frames. Perimeter joints need a sealant that suits both frame and masonry.
The 12-month guarantee covers our workmanship: preparation, application and finish. It doesn’t extend to damage, other trades’ later work or movement the joint was never designed to take.
- Where
- Chesham Bois (HP6, HP5)
- Region
- Buckinghamshire
- Cover
- 12 months on our workmanship
- Quotes
- A fixed quote before we start
- Phone
- 01277 525 020
- Updated
- 3 November 2026
Owners, agents and contractors
We work for building owners and managing agents on everything from one building to a spread of sites around Chesham Bois. One quote can cover more than one site, so there’s one set of paperwork to deal with.
Housing associations and managing agents often need work done across blocks and communal areas. Work can be phased so residents and staff keep access throughout, and each stage is agreed with your contact.
Also near Chesham Bois
Also in Chesham Bois
Chesham Bois: questions and answers
Is Chesham Bois off your patch?
No. Places such as Chesham Bois are covered as much as the big towns. We cover Greater London and the counties of the South East. Send photos and a list of what needs doing, and we’ll plan the job to need as few trips as possible.
Will you take on a block within reach of Amersham station?
Yes. Managing agents, landlords, property factors and housing associations are who this service is for. Give us the building’s details and say how residents are notified, and we’ll quote and plan to suit.
How many days will you need on site?
The duration is planned around your programme and the access we’re given. We’ll give you an estimate of time on site when we quote.
How long before the joints can be used?
We will confirm how long the chosen product needs to cure, and flag anything to keep off until it has cured.
Can weather delay the job?
It can, for external work. Sealant won’t bond properly to a wet or frosty joint, so external work may be moved if conditions aren’t right. Internal work is far less affected.
Do you check for asbestos in old sealant?
Some mastics in pre-2000 buildings contain asbestos. We check the asbestos register or survey before disturbing it, and if it’s suspected, work stops until it’s tested.
Can people stay in the building while you reseal?
The work is planned around occupiers. We agree the programme so you can notify occupiers, and entrances stay in use.
Why act early in Chesham Bois
Piecemeal repairs over the years often leave mismatched sealant. Resealing a whole building gives a consistent finish and one 12-month guarantee. Small buildings around Chesham Bois suffer from failed joints as much as large ones. Early resealing avoids the damage that follows a leak.
Quantities, awkward access and phased working all shape the price. Site requirements like inductions and permits play a part as well.
What you get with us
- CSCS-carded applicators
- Products installed to the manufacturer’s instructions
- A range of standard colours, depending on the product
- Colours chosen to suit frames, cladding or finishes where possible
Take a look at our cost guide and how we’re accredited.
What we’re called out for in Chesham Bois
UV and rain age external sealant. It stiffens, stops stretching and cracks, especially on south and west faces.
Any of the following is a good reason to get the joints checked over:
- Repeated reactive repairs to the same buildings
- Open joints in brickwork or panels
- Damp patches beside frames
- A mix of products and colours from past repairs
Blocks of flats and mixed-use buildings often cluster around stations such as Amersham station (to the south of Chesham Bois) and their window and balcony mastic tends to age at the same rate across a building.
Questions to ask before you book
- Are they CHAS accredited or on Constructionline?
- Will failed sealant be removed rather than covered?
- Whether primer will be used where the manufacturer specifies it
- Their public liability cover
Maintenance after handover
A few simple habits keep the new joints working:
- Check sealant joints during planned building inspections
- Have the asbestos survey to hand for older buildings
- Track which buildings were done and when
- List the paperwork your organisation requires when you send details
Add mastic joints to your cyclical inspections. Watch for splits, open gaps, hard or chalky surfaces and mastic pulling away and record where they are.
Joints on a building age together, so it pays to look at the whole elevation. Doing them together saves going back again and again.
What we can’t put right
Before quoting, we check that sealant is the right answer. It isn’t the answer for:
- Glazing that needs replacing
- Water coming in from the roof or rainwater goods
- Substrate edges that need repairing first
If in doubt, speak to us on 01277 525 020 or send details through our quote form and we’ll say what we think.
Where we work in Chesham Bois
- Shopfronts below residential blocks
- Window and door perimeters on blocks
- External wall and movement joints
- Communal entrances and stairwells
- Balcony and threshold joints
- Communal kitchens and washrooms
Block-wide mastic in Chesham Bois
Chesham Bois sits in one of the drier corners of the country, the South East. Outside work still depends on dry joints, and elevations facing the sun and the prevailing weather are usually where frame mastic ages first. Chesham Bois lies roughly 25 miles out from central London. Managed blocks of flats are a big part of commuter-belt property, and window and balcony mastic on them tends to age at the same rate.
Student blocks close to universities like Buckinghamshire New University, 1.8 miles to the west of Chesham Bois, are easiest to work on between tenancies. If your remit includes a building such as Elangeni School, frame and door mastic can be programmed for the holidays.
Chesham Bois is about 1 mile north of Amersham, in Buckinghamshire. If you’re looking for mastic sealing in Chesham Bois, we can help. Chesham Bois is one of 308 places we cover in Buckinghamshire. Sites around Reading have their own page, about 23 miles away.
We cover the HP6 and HP5 postcode districts. For a building on Bois Lane, Green Lane and North Road or nearby, send details and we’ll quote for mastic joints. Sites close to Chesham Bois are covered too, including 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). A short drive away, we cover 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).
Near you in Chesham Bois
We work on buildings around Dr Challoner's Grammar School, The Boot and Slipper pub and Home Tuition Service. For rail, the closest station is Amersham station, about 0.8 miles south of the centre. Nearby you’ll also find Amersham Fair Organ Museum (0.6 miles south-east) and Amersham Hospital (1.7 miles south-west). For a walk, there’s Sands Bank.
From enquiry to sign-off
When we get to site, we sign in, go through any site induction and check how permits are handled. Floors, finishes and fittings next to the joints are covered before anything is cut or cleaned, and the work typically takes a few days for most blocks, with larger programmes scheduled building by building. For a job in Chesham Bois, the main thing is a clear picture of the work, so send photographs of each area. You’ll then get a fixed price for the work.
- First comes a look at the joints and, for older buildings, the asbestos records.
- The products and programme are set out in a fixed quote.
- Failed mastic is removed completely.
- Joint faces are cleaned, backed and resealed.
- Buildings are completed in turn.
What we need from you
- Let building users know which areas are affected
- Flag any permit to work we’ll need
- Send asbestos survey details if the building is pre-2000
Get a fixed quote
To get a fixed quote, ring 01277 525 020 or email a schedule or drawings, telling us the site location and the nature of the job. You can also send details through our quote form.