Kent · England
New-build mastic & snagging in Knave's Ash, Kent
Plot mastic for developers and snagging failed sealant in new homes for homes and businesses in Knave's Ash and across Kent. Fully insured, ARBOMaster approved and guaranteed for a year.
- Sealant applied over dusty or wet surfaces
- Cracked caulk along new skirting
- Gaps opening as the house dries out and settles
New build mastic in Knave's Ash, done properly
Dust is the enemy of new-build sealant. Each joint is cleaned of dust and primed where the product calls for it, so the sealant actually sticks rather than sitting on a layer of grit. We work on bathrooms & en suites, kitchens and windows & doors, and common reasons people get in touch are cracked sealant around new window and door frames and worktop and upstand sealant coming away.
Work in a small place like Knave's Ash just needs the journey and access planning, and the work itself is the same as on any site.
We guarantee the work for a year. If something is not right with it in that time, tell us and we’ll put it right.
- Location
- Knave's Ash (CT3)
- Wider area
- Kent
- Cover
- 12 months on all our work
- Price
- A clear price before we start
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
What we can’t put right
We won’t take on work that won’t last, so these are the limits:
- Deciding who is responsible under a builder’s warranty
- Leaks from pipes, valves or wastes, which need a plumber
- Baths and trays that move too much for sealant to cope with
If in doubt, call 0345 464 0079 or drop us an email and we will say what we think before you book.
Surfaces we seal
- Bathrooms & en suites
- Skirting & floors
- Windows & doors
- Kitchens
- Plot handovers
- Show homes
How to look after the new joints
After the cure time, these simple habits help:
- Wipe joints with warm soapy water
- Get a leaking seal dealt with right away
- Keep water off fresh sealant until it has cured
- Report sealant problems to your builder during the snagging period
Avoid standing on the rim of the bath or the edge of the tray in the first few weeks. Report any movement in a bath or tray.
Leave a failed new-build seal and water can reach the floor and the ceiling below. Catching it early keeps the fix to the sealant.
Work for landlords, hotels and businesses
Whether it’s one flat or a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a 12-month guarantee.
For anyone letting property in or around Knave's Ash, several properties can go on one quote. Just tell us the addresses and what each one needs, and pictures by email help.
Knave's Ash questions
I let a flat near Herne Bay station. Can you help?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or email us and tell us about the property, and we will send you a clear quote.
Do you cover Knave's Ash for new build mastic?
Yes. We work across London and the South East, and Knave's Ash is part of that. Just phone 0345 464 0079 or email us with a few details of the job, and we’ll send you a clear quote.
How do I get a quote for new build mastic in Knave's Ash?
The cost depends on the size of the job, access and how much old sealant has to come out. Call for a quick quote.
Is there any odour?
That depends on the sealant. Some smell for a while, some hardly at all, and any smell fades as they cure.
Will you just run a new bead over the existing one?
No. Fresh silicone does not stick to the old layer, so it soon lifts and traps water. The old sealant always comes out first.
Are you ARBOMaster approved?
Yes. Mr Mastic is an ARBOMaster approved applicator and we’re fully insured too.
Is it worth resealing while the house is still settling?
If the seal has failed and water is getting in, do it now. Small gaps that are just cosmetic can be resealed once movement has slowed.
Can you work from my snagging list?
Yes. Send it with pictures and we’ll quote for the sealant items. Items that need a plumber, tiler or the builder are flagged.
What happens on the day
There’s no need to move everything out, just the space around the work. Everything nearby is protected, and the job takes anything from a few hours to several days, depending on the number of plots in most cases. For a village or hamlet like Knave's Ash, the journey is planned in advance: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- We look at why each joint failed, including any movement.
- Old sealant is cut out and the joints cleaned.
- We make sure the joints are dry and prime them if needed.
- New sealant goes in, with baths filled first so they’re at their heaviest.
- The finished joints are checked and the cure times given.
Getting ready for the visit
- Mention any leaks or damp you’ve noticed
- Tell us if parking is tricky
- For business premises, tell us about site rules or sign-in
Getting a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we’ll talk you through the work before giving you a price.
Advice
Can I do it myself?
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
New build mastic in Knave's Ash: local notes
Knave's Ash is close to the coast. New homes near the sea put their outside mastic to work from day one, so it’s worth checking at snagging. 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.
Around Knave's Ash, as everywhere, new build mastic is only as good as the preparation behind it.
Knave's Ash is about 2 miles south of Herne Bay, in Kent. If you need new build mastic in Knave's Ash, it’s easy to get a quote: please ring 0345 464 0079 or email us. We cover Kent from our Crawley base. We cover 922 towns and villages across Kent, large and small. For nearby work, see our Chelmsford page, about 40 miles away.
Jobs for new build mastic in CT3 is quoted and booked the same way as anywhere else. Streets in the area include Hicks Forstal Road and Hoath Road, and we cover them all. Close by, we work in Hoath (1 mile east), Maypole (1 mile north-east), Old Tree (1 mile north-east), Millbank (1 mile north-east) and Hicks Forstal (1 mile west). Further out, we also cover Canterbury (5 miles south-west), Margate (10 miles east), Dover (15 miles south-east), Ramsgate (11 miles east), Broadstairs (12 miles east) and Whitstable (5 miles west).
Near you in Knave's Ash
We work in homes and buildings around Curtis Wood and Spires Academy. Knave's Ash’s nearest station is Herne Bay station, about 2.6 miles north-west. A little further out are St Martins Hospital (4.4 miles south-west). The countryside around Knave's Ash includes West Blean and Thornden Woods.
Signs you need new build mastic in Knave's Ash
The wrong product is sometimes used in the wrong place: caulk where water collects, or a rigid product on a moving joint. Both fail early.
The problems people generally mention when they call are:
- Kitchen sealant that has pulled off the wall
- Cracks appearing as a new home settles
- Shower seals failing in the first year or two
- Messy sealant that spoils new finishes
For new homes near Herne Bay station, it’s worth checking the sealant early, while snags are still fresh.
Questions to ask before booking
- Which colour the sealant will be
- Who turns up on the day
- Are they insured?
- What the quote includes, VAT included or not
Other services in Knave's Ash
What happens if it’s left?
Small cosmetic gaps can wait for the house to settle, but a leaking seal cannot. If you are unsure which you have, ring 0345 464 0079 or send us an email with photos. In a small place like Knave's Ash, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
Every job is a little different, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all make a difference, and we’ll explain the quote if you ask.
What you get with us
- Sealant colour chosen to suit
- Anti-fungal sanitary silicone in wet areas
- An ARBOMaster approved applicator
- A choice of colours where the product allows
Take a look at how sealant jobs are priced or our reviews.