Construction Mastic in Chesham
Mastic packages for new-build and refurbishment projects in Chesham. CHAS accredited and fully insured, with a 12-month guarantee.
- Existing joints on a refurb that need cutting out and resealing
- Cracks opening in caulked internal joints
- Snag items on joints that need redoing before handover
Construction mastic in Chesham
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
Keeping the joints sound
After handover, these steps help:
- Release areas for mastic once other trades have finished in them
- Keep scrapers and abrasive pads off new beads
- Check frame gaps are within the sealant’s range before sealing
- Get the mastic subcontractor involved early in the programme
Record which products went where in the handover file. Future maintenance is easier when the products are known, and tells you what to reseal with. We can confirm the handover information you need when we quote.
One unsealed frame can let water into finished internal areas. On a new building that means remedial work after decorating and possibly a delayed handover. Checking perimeters before internal finishes go on avoids it.
Construction mastic in Chesham
Refurbishment work needs a slightly different approach from new build. Old beads come out completely, as fresh silicone can’t grip old and the asbestos survey is checked first on older stock. New and existing joints then get the same preparation. We work on internal decorators’ caulk, sanitary and kitchen joints and brick and block movement joints, and the failures we’re asked to look at most are snag items on joints that need redoing before handover and failed sealant in an existing building being refurbished. Whoever orders the work in Chesham, the brief is typically the same: a fixed quote, no surprises on site and a 12-month guarantee behind the result.
Construction in a town such as Chesham is often smaller schemes: a few new flats, a school extension, a refurbished unit. A mastic package on a smaller site still needs the same care at window perimeters and facade joints.
Guaranteed is the last step of every job. Our workmanship is backed for 12 months, and we explain exactly what that covers when we quote.
- Location
- Chesham (HP5)
- Region
- Buckinghamshire
- Cover
- 12 months on every job
- Quote
- Quoted before any work starts
- Phone
- 01277 525 020
- Page updated
- 3 November 2026
How the quote is worked out
There’s no standard rate for sealant work, because every site is different. What we look at:
- Backing rod, priming and other preparation
- Specialist products, such as fire-rated or hygienic sealants
- Removal of failed or old sealant
- Induction, permit and paperwork requirements
Cost follows what’s involved: removing old material, preparing the joints, the product, the access and how the work is phased. Call for a quote and we will explain how it’s made up.
What we need to price the job
To price the job accurately, we need to understand the site. Useful things to include:
- Approximate linear metres or a joint schedule
- Asbestos survey details if the building is older
- Clear photographs of the problem areas
- The site address and postcode
Tell us about the building, the joints and when you need the work done, and we will put a fixed quote together. The easiest way is to give us a call on 01277 525 020 or email a schedule or drawings.
FAQs: Chesham
Can you take on a job at a hospital such as Amersham Hospital?
Yes. We work in healthcare settings as well as offices and schools. The estates team’s permit system and infection-control rules come first, and the work is planned around them.
Will you take on work at estates like Waterside Business Park, close to Chesham?
Yes. We cover Chesham and the area around it, including industrial estates, business parks and retail parks such as Waterside Business Park. Send details of the unit and the work through our quote form for a quick quote.
What will the job cost?
There isn’t a price list, as every site differs. With photographs or drawings, we can give you a fixed quote.
Do you do internal caulk as well as external mastic?
External perimeters and movement joints, internal caulking where specified, sanitary and kitchen joints, plus snagging.
Will you quote for a small job?
Small jobs are welcome alongside larger packages. Send details for a fixed quote.
What accreditations do you hold?
We are CHAS accredited and a Constructionline member, and our applicators hold CSCS cards. We are fully insured for public liability.
Do you have public liability insurance?
Yes. We are fully insured, including public liability cover.
Should maintenance staff do it?
Certain joints really need a specialist: fire-rated seals that must follow a tested detail, trafficked floor joints and external movement joints among them. A poor seal in places like these tends to cost more to put right later.
Site maintenance staff can often handle a short internal joint. Where it goes wrong is preparation: new sealant over old, damp or dusty faces, or the wrong product for the movement.
Nearby places to Chesham
Other services in Chesham
Our process
On arrival, we sign in, go through any site induction and check how permits are handled. Everything around the joints gets protected before any cutting starts, with the work itself usually taking a day or two on a small fit-out and several weeks on a large multi-storey package. If you have more than one building in Chesham, they can often be done on the same visit, with one quote covering them. Tell us when the building is open and we’ll plan to suit.
- We price from the drawings, specification and programme you send.
- You receive a fixed quote listing scope, products and phasing.
- You tell us what site paperwork you need, such as RAMS, an insurance certificate or CSCS details, and we confirm it with the quote.
- Areas are sealed plot by plot or floor by floor as the trades hand them over.
- Joints are cleaned, primed where the maker requires it, backed and sealed to the specification.
- We close out snagging and hand over with a 12-month guarantee.
Getting the site ready
- Tell us which areas need to stay in use
- Send asbestos survey details if the building is pre-2000
- Have the specification and drawings to hand
Quotes
Pricing a project or setting a maintenance budget? Send the scope and any drawings, and we will return a fixed quote you can plan around. If you have questions first, call the office on 01277 525 020 or email drawings and photos.
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Mastic packages on Chesham sites
The South East is one of the drier parts of the UK. Still, external mastic needs dry faces within the maker’s temperature limits, which isn’t every day, so we time external mastic for dry faces and agree it with the site team. At about 27 miles from central London, Chesham is within reach of the capital. Building activity in the commuter belt runs from new flats near stations to business park refurbishments, and each scheme needs its mastic sealed to programme.
When a school such as Elmtree Infant and Nursery School is extended or refurbished, the mastic package is often squeezed into the holidays. Units on estates such as Waterside Business Park (to the south of Chesham) tend to be reclad and refitted as tenants change, and each job leaves cladding and perimeter joints to seal.
Chesham is about 7 miles south-west of Hemel Hempstead, in Buckinghamshire. We cover commercial sites throughout Chesham, whether it’s a single job or part of a planned programme. Across Buckinghamshire, 308 places are covered, Chesham among them. We also cover Reading, some 24 miles away.
Business premises anywhere in HP5 are within our area. We cover commercial and managed buildings on High Street, Station Road and Sunnyside Road. Chesham sits on or close to the A416 and B485, which helps when planning parking and deliveries for the job. Nearby places we also cover include Pond Park (1 mile north), Chartridge (2 miles north-west), Hundridge (2 miles west), Asheridge (2 miles north-west) and Bellingdon (2 miles north-west). Further afield, our area takes in Aylesbury (11 miles north-west), High Wycombe (8 miles south-west), Marlow (12 miles south-west), Amersham (3 miles south), Beaconsfield (7 miles south) and Chalfont St Peter (8 miles south). Chesham is one of the busier places in Buckinghamshire, and its commercial and public buildings are all within our area.
Around Chesham
We work on buildings around Chiltern Hills Academy and The Jolly Sportsman pub, among other places. The nearest railway station is Amersham station, about 2.6 miles south. A little further out are Amersham Hospital (3.4 miles south) and Hawridge Court (2.2 miles north). The countryside around Chesham includes Sands Bank.
When to call us in Chesham
On construction sites, joints normally fail early because of when they were sealed, not what was used. If sealant goes in before the last trades are through, it gets knocked, painted over or contaminated, and the joint has to be redone.
Most enquiries start with something like this:
- Cracks opening in caulked internal joints
- Bath and shower joints scraped during the final clean
- External joints sealed in damp or cold conditions that are now failing
- Frame perimeters left unsealed or poorly sealed
Older buildings in the area around Chesham, such as Cholesbury Manor House (3.5 miles north-west of Chesham), need care when sealed: the product has to suit soft or historic materials.
What your quote should include
- Health and safety accreditation such as CHAS
- How they’ll work around occupants
- The named product and why it was chosen
- What level of public liability insurance do they hold?
When it isn’t the sealant
Our job is the joint, not everything around it. Sealant alone won’t deal with:
- Glazing units that are cracked or misted
- Designing joint widths or choosing the specification (that sits with the designer)
- Oversized gaps that need packing or adjustment by others
Not sure which it is? You can call 01277 525 020 or use the quote form and we’ll tell you honestly before you book.
What we seal
- Brick and block movement joints
- Internal decorators’ caulk
- Cladding and panel joints
- Floor and skirting junctions
- Window and door perimeters
- Sanitary and kitchen joints