Surrey · England
Chelsham New Build Mastic
Our applicators work in Chelsham on plot mastic for developers and snagging failed sealant in new homes. Old material cut out, joints cleaned and sealed neatly and every job guaranteed for a year.
- Leaking shower tray seals in a new home
- Gaps behind new kitchen upstands
- Sealant work across a run of new homes
What happens if it’s left?
For developers, getting the sealant right first time saves return visits. Every return visit for a failed seal takes time. Where a wall is exposed, as many are in small places like Chelsham, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Homes and businesses are quoted the same way: the amount of work, how we reach it and what it needs, plus any working-time requirements on site. Ask us for a quote and we’ll go through it with you.
Why choose Mr Mastic in Chelsham
- Colour picked to suit the job
- Anti-fungal sanitary silicone in wet areas
- Full insurance on every job
- 12-month guarantee on every job
Take a look at what affects the cost or what customers say.
How we handle new build mastic in Chelsham
Our new-build work comes in two parts: plot mastic for developers, and putting right failed sealant for people who’ve bought a new home. Both get the same care over preparation since hurried prep is behind a lot of new-build failures. Common call-outs are for messy sealant that spoils new finishes and cracks appearing as a new home settles, on kitchens, windows & doors and skirting & floors.
For a small place like Chelsham, the journey and access are planned in advance, and the work itself is the same as on any site.
Whatever the size of the job, it’s backed by our one-year guarantee in Chelsham and across Surrey.
- Where
- Chelsham (CR6)
- Region
- Surrey
- Guarantee
- One year on every job
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
New build mastic around Chelsham
London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you’ve bought a new home near Woldingham station, the sealant around baths, showers and frames is worth checking in the first year or two.
Chelsham is about 3 miles north-east of Caterham, in Surrey. From the centre of Chelsham to the outskirts, new build mastic is available for homes and businesses alike. Across Surrey, we cover 395 places, Chelsham among them. Our London page covers work nearby.
All of CR6 is within our area for new build mastic. If you need new build mastic at a property on Chelsham Common and Chelsham Road or anywhere close by, our applicators can take on the job. Nearby, we also carry out new build mastic in Farleigh (1 mile north), Warlingham (1 mile west), Hamsey Green (1 mile west), Fickleshole (1 mile north-east) and New Addington (2 miles north). We also work in nearby towns such as Epsom (10 miles west), Horley (11 miles south-west), Redhill (8 miles south-west), Ewell (10 miles west), Reigate (9 miles south-west) and Caterham (3 miles south-west).
Near you in Chelsham
Around Chelsham, our work takes us to homes and buildings near Warlingham School, Ledgers Wood and Hare & Hounds pub, among other places. Chelsham’s nearest station is Woldingham station, roughly 1.9 miles south-west of the centre. Other landmarks nearby include Warlingham Park Hospital (less than half a mile north) and East Surrey Museum (3 miles south-west). Open spaces near Chelsham include Hutchinson's Bank and Nore Hill.
Your questions about new build mastic in Chelsham
Can you do new build mastic in Chelsham?
Yes. We work across London and the South East, and Chelsham is part of that. Just ring 0345 464 0079 or drop us an email with a few details of the job, and we will give you a clear quote.
Can you help a landlord with a rental near Woldingham station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. Just ring 0345 464 0079 or send us an email with the address and what needs doing, and we’ll give you a clear price.
Where do you work from?
We are a Crawley-based firm. Our area covers South East England, London and Scotland.
Do you take out the old sealant first?
Always. Sealing over the old bead is the commonest cause of early failure, so we never do it.
Will there be a smell?
Some sealants have a smell while they cure, which fades as it sets. Ventilation helps.
Do I have to be there?
For indoor joints, yes, someone needs to let us in. After that, you can carry on with your day.
Do you do commercial work?
Yes. Hotels, offices and other businesses use us and we’re fully insured.
How do I get a quote for new build mastic in Chelsham?
There’s no set price, as it depends on the job: how much there is, what’s there now, how we reach it and what it needs. We agree the price before any work begins.
Common problems we fix in Chelsham
On many sites, sealant goes on in the final rush before handover. Dusty, unprimed joints are common, so the bead never bonds properly.
Signs it’s time to call us include:
- Leaking shower tray seals in a new home
- Gaps opening as the house dries out and settles
- Gaps behind new kitchen upstands
- Sealant applied over dusty or wet surfaces
Around Chelsham, as everywhere, new build mastic is only as good as the preparation behind it.
Comparing quotes
- Whether they seal over old material or remove it
- Which sealant they’ll use, and why
- How long the guarantee is
- Who does the work, and how experienced they are
Keeping the joints in good condition
To keep the joints looking good and working properly:
- Wipe joints with warm soapy water
- Look at the sealant regularly in the first couple of years
- Photograph failed sealant before it’s redone
- Resist patching a failed seal with a tube from the DIY shop
Clean the sealant with a mild detergent and a soft cloth. Avoid abrasive pads and strong solvents as they wear the bead.
A failed seal in a new home lets water into joists, plasterboard and ceilings. Early resealing keeps the job small and protects the rest of the house.
How the visit works
When we arrive, we start by going over the job with you, so there are no surprises. Surfaces next to the work are protected before we start. The work normally takes a few hours for most snagging lists, longer for a run of plots. In a small place like Chelsham, access is usually the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First we work through your snagging list or plot schedule with you.
- The old bead comes out in full, with no layer left behind.
- Surfaces are cleaned of building dust and primed where needed.
- New sealant suited to each joint is applied and tooled neatly.
- Finally, each room is checked and you’re given the cure time.
Getting ready for the visit
- Mention any leaks or damp you’ve noticed
- For indoor joints, keep the area dry beforehand if you can
- Keep children and pets away from the work area
How to get a quote
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we’ll talk you through what we’d do. When it suits you, phone 0345 464 0079 or drop us an email.
Read more
What affects the cost of new build mastic
Jobs vary more than people expect. What affects the quote:
- The type of sealant required
- How much there is to do
- Access and height
- The number of rooms or windows
The cost reflects the work involved, not guesswork. That’s why we ask about the job first and give you a clear price before work begins.
What we need to know
To help us quote quickly, please include:
- The type of property
- The address or postcode of the job
- If someone has resealed it before
- Roughly how big the job is
Asking for a quote is easy: let us know what needs doing and where. Photos by email help us understand the job, and we’ll take it from there.
Also near Chelsham
What else we do in Chelsham
When something else is needed
Before booking, it’s worth knowing the limits:
- Cracked trays, tiles or worktops
- Movement caused by a poorly fitted tray or bath
- Your warranty claim itself, which is between you and the builder
If in doubt, phone 0345 464 0079 or drop us an email and we will say what we think before you book.
Joints and surfaces we work on
- Show homes
- Bathrooms & en suites
- Windows & doors
- Kitchens
- Skirting & floors
- Plot handovers
DIY versus a professional finish
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.