Buckinghamshire · England
Chesham Bois New Build Mastic
New-build sealant joints in Chesham Bois need attention? We cut out the old, prepare the joints and apply the right sealant.
- Leaking shower tray seals in a new home
- Beads laid onto grit and dust from the build
- Smeared, uneven beads picked up at snagging
Can I do it myself?
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is.
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
About our new build mastic in Chesham Bois
We carry out plot mastic and second-fix sealing for builders, and snagging reseals for new-home owners. Both get the same care over preparation, because that’s what rushed new-build sealant usually lacks. If you are dealing with leaking shower tray seals in a new home and sealant that never bonded to the surface, we can put it right.
Where new homes go up in smaller places like Chesham Bois, it’s often a small development or a single plot. Each still needs its sealant and floor joints finished properly from day one.
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.
- Location
- Chesham Bois (HP6, HP5)
- Wider area
- Buckinghamshire
- Cover
- One year on every job
- Price
- A clear price before we start
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
What sealant work can’t fix
Sealant is not the answer to every problem, and we will tell you before any work starts. Sealant won’t put right:
- Leaks from pipes, valves or wastes, which need a plumber
- Your warranty claim itself, which is between you and the builder
- Structural cracks in walls or ceilings
If in doubt, call 0345 464 0079 or send us an email and we’ll say what we think.
Where we work in Chesham Bois
- Kitchens
- Windows & doors
- Show homes
- Bathrooms & en suites
- Plot handovers
- Skirting & floors
How it works
We bring everything the job needs with us. Once we have agreed what’s being done, we protect the area and start. Most jobs take a few hours in a single home. 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 start by agreeing which joints are on the list, from the snagging sheet or plot schedule.
- We cut out every bit of the failed or messy sealant.
- Each joint is cleaned of dust and grit, then primed if required.
- New sealant suited to each joint is applied and tooled neatly.
- We check every joint and tell you how long each needs to cure.
Before we arrive
- Clear the area around the work
- Let us know about stairs, lifts or work at height
- Keep pets and children clear of the area while we work
Ask for a quote
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is.
Read more
Landlords, agents and businesses in Chesham Bois
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
In hotels, rooms out of use cost money, 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.
FAQs for Chesham Bois
I let a flat near Amersham station. Can you help?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before work begins.
Is Chesham Bois within the area you cover?
Yes, Chesham Bois 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 your work?
Yes, for a year. If there’s a problem with our work in that time, tell us and we will put it right.
Do you take out the old sealant first?
Yes. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
How do I get a quote for new build mastic in Chesham Bois?
Size, access and the old material all affect the cost. Ask us for a quote and we will talk you through it.
When is the sealant fully cured?
That depends on the sealant used, so please follow the time we give you when we finish.
How long will you be here?
A typical job takes anything from a few hours to several days, depending on the number of plots. Your quote will say how long we expect yours to take.
Can new sealant go on top of the old bead?
No. Sealing over old sealant looks fine for a few weeks, then lifts. All the old sealant comes out before we start.
Nearby places to Chesham Bois
What else we do in Chesham Bois
Common problems we fix in Chesham Bois
Sealant is often one of the last jobs before handover. Dusty, unprimed joints are common, so the bead never bonds properly.
Any of these means the joints need attention:
- Skirting joints opening in the first winter
- Plot mastic for developers ahead of handover
- Beads laid onto grit and dust from the build
- Gaps opening as the house dries out and settles
In and around Chesham Bois, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Questions to ask before booking
- Are they insured?
- Whether you can choose the colour
- How the surfaces are prepared before sealing
- Whether they seal over old material or remove it
Why act early in Chesham Bois
Resealing everything on a snagging list in one visit is normally simpler than chasing joints one at a time. You get one visit and one clear quote to plan around. In a smaller place like Chesham Bois, wherever a wall is exposed, a failed outside joint is a real source of damp. Indoors, a failed seal lets water into floors and panels as it would anywhere.
No two jobs are quite the same, so each one gets its own quote. Size, access and the product the joint needs all play a part, and we will explain the quote if you ask.
Why choose Mr Mastic in Chesham Bois
- Old sealant always removed completely
- Domestic, commercial and hotel work
- White, clear, grey or another colour, product permitting
- Quality sealants from Arbo and Everbuild
What new build mastic looks like in Chesham Bois
The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you’ve bought a new home near Amersham station, the sealant around baths, showers and frames is worth checking in the first year or two.
Chesham Bois is about 1 mile north of Amersham, in Buckinghamshire. From the centre of Chesham Bois to the outskirts, new build mastic is available for homes and businesses alike. Chesham Bois is one of 263 places in Buckinghamshire where we work. Our Reading page covers work nearby, about 23 miles away.
All of HP6 and HP5 is covered for new build mastic. Streets in the area include Bois Lane, Green Lane and North Road. We also cover the places around Chesham Bois: 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). Within a short drive, we also 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).
Landmarks near Chesham Bois
We work in homes and buildings around Dr Challoner's Grammar School, The Boot and Slipper pub and Home Tuition Service and the streets around them. For rail, the closest station is Amersham station, roughly 0.8 miles south. A little further out are Amersham Fair Organ Museum (0.6 miles south-east) and Amersham Hospital (1.7 miles south-west). Not far away are Sands Bank.
How we quote for new build mastic
You will get a clear quote before any work starts. It’s based on:
- Which sealant suits the joint
- Any mould that needs treating
- The old material and how stubborn it is
- Access and height
The cost depends on the amount of work, how much old material has to come out and how easy the joints are to reach. You’ll have a clear quote before any work starts.
What we need to know
Before you ask for a quote, have a think about:
- Where the job is, and your postcode
- Access, such as stairs, a lift or height
- What the problem is, such as mould, gaps, leaks or cracking
- Whether it has been sealed before
Call for a quick quote, or email us if that’s easier. Tell us about the joints that need doing and we’ll talk you through the work.