Kent · England
Platt New Build Mastic
New build mastic in Platt from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Internal frame sealant that has split
- New-build shower sealant that has already split
- Beads laid onto grit and dust from the build
New build mastic in Platt, 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. If you’re dealing with gaps opening as the house dries out and settles and new-build shower sealant that has already split, we can help, on kitchens, plot handovers and windows & doors alike.
Somewhere as small as Platt, new homes tend to be conversions, self-builds or a few houses rather than an estate. Every one needs its sealant and floor joints done properly, whatever the size of the site.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Where
- Platt (TN15)
- Region
- Kent
- Cover
- A year, on every job
- Quotes
- A clear price before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Your questions about new build mastic in Platt
I let a flat near Borough Green & Wrotham station. Can you help?
Yes. We work for landlords and letting agents as well as householders. Just ring 0345 464 0079 or send us an email with the address and what needs doing, and we will give you a clear price.
Do you cover Platt for new build mastic?
Yes, Platt is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or email us and tell us what needs doing, and we’ll send you a clear quote.
Can I send you my snagging list?
Yes. Photos of each sealant item help us quote. Items that need a plumber, tiler or the builder are flagged.
When is the best time to reseal in a new build?
Where water is getting through, don’t wait. Small gaps that are just cosmetic can be resealed once movement has slowed.
Should I try DIY first?
You can, for simple jobs. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
How long before the joint can be used?
Most sealants are touch-dry well before they’re fully cured. We’ll tell you how long to leave the joint.
Are you an approved applicator?
Yes. We are approved under the ARBOMaster scheme, the approved applicator scheme for Arbo sealants.
Are you fully insured?
Yes. Mr Mastic is fully insured, and we’ve been doing sealant work for more than 20 years.
Also in Platt
Keeping the joints in good condition
Simple care keeps the joints in good condition. We recommend:
- Raise failed sealant with the developer while you’re covered
- Wipe joints with warm soapy water
- Look at the sealant regularly in the first couple of years
- Resist patching a failed seal with a tube from the DIY shop
Keep photos of the joints and any snagging correspondence with your builder. It’s useful if you need to raise other issues later.
Mould takes hold quickly in sealant that has gaps or lifted edges. Resealing before mould gets in keeps the job straightforward.
What the job involves on each surface
Bathrooms and en suites
En suite seals are easy to miss on a snagging list until they leak. Resealing properly keeps water where it belongs.
Skirting and floors
As timber and screed dry, skirting and floors shift. Caulk cracks; a flexible sealant moves with it in a colour to suit.
For landlords and businesses
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance that we can handle for you.
Hotels need rooms back in use, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
How we quote for new build mastic
The price is agreed before any work begins. It takes into account:
- Which sealant suits the joint
- The old material and how stubborn it is
- Any working-time requirements on site
- Access and height
Rather than a set price list, we price the job in front of us: the amount of work, the old material and the access. You’ll know the price before we begin.
Helping us quote
To help us quote quickly, please include:
- Pictures of the joints, sent by email
- If it’s domestic, commercial or a hotel
- The address or postcode of the job
- How we’d reach the joints
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we will explain how we’d tackle it. When it suits you, call 0345 464 0079 or drop us an email.
What happens on the day
All our tools and materials come with us in the van, so there’s nothing for you to buy. After a quick look at the joints together, we protect the area and start. It normally takes a few hours in a single home. For a village or hamlet like Platt, the journey is planned in advance: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- We go through the snagging list or plot schedule and agree the joints to do.
- The old bead comes out in full, with no layer left behind.
- We clean off dust from the build and prime the surfaces where the product needs it.
- We apply a sealant that suits each joint and tool it to a neat finish.
- Each area is checked and left with its cure time.
Getting ready for the visit
- Plan for the work area to be out of bounds to pets and children
- Try not to wet indoor joints just before the visit
- Clear the area around the work
Get a quote
Call for a quick quote, or send an email if you’d rather. Tell us about the joints that need doing and we will explain what’s involved and give you a clear quote.
Read more
Joints and finishes in Platt homes
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.
In and around Platt, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint. If you’ve bought a new home near Borough Green & Wrotham station, the sealant around baths, showers and frames is worth checking in the first year or two.
Platt is about 6 miles east of Sevenoaks, in Kent. For new build mastic in and around Platt, please phone 0345 464 0079 or email us for a quick quote. We’re based in Crawley and cover Kent. 922 places in Kent are on our list, large and small. For nearby work, see our London page.
We cover every part of the TN15 postcode area for new build mastic and the streets around it. You’ll find streets such as St Mary's Close, Grange Road and Platt Common, and we cover them all. We also cover the places around Platt: Comp (1 mile south-east), Borough Green (1 mile west), Crouch (1 mile south-west), Wrotham Heath (1 mile north-east) and Basted (1 mile south-west). Further out, we also cover Maidstone (9 miles east), Dartford (12 miles north-west), Sevenoaks (6 miles west), Royal Tunbridge Wells (11 miles south), Gravesend (10 miles north) and Tonbridge (7 miles south).
Around Platt
We work in homes and buildings around Wrotham School, The Blue Anchor pub and Wrotham School and the streets around them. Platt’s nearest station is Borough Green & Wrotham station, roughly 0.9 miles west. Well-known places in the area include Ightham Court (1.8 miles west) and Beechin Wood Archery Museum (within half a mile south-east).
Why act early in Platt
It often makes sense to do all the sealant items on a snagging list together. You get one visit and one clear quote. Where a wall is exposed, as many are in small places like Platt, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
What you pay reflects the work, not a rough estimate. That is why we ask a few questions first and agree the price before starting.
Why choose Mr Mastic in Platt
- Colour picked to suit the job
- Arbo and Everbuild products
- We agree the colour with you first
- Experience in homes, commercial sites and hotels
See our cost guide or our reviews.
Can I do it myself?
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
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.