Kent · England
New-build mastic & snagging in Kemsing, Kent
Professional new build mastic in and around Kemsing, with every bit of old sealant taken out first and a one-year guarantee.
- Internal frame sealant that has split
- New-build shower sealant that has already split
- Gaps between new skirting and floors
New build mastic for homes and businesses in Kemsing
Building dust is behind a lot of failed new-build sealant. We clean every joint thoroughly and prime where the surface and product need it, so the new bead bonds properly instead of bonding to the dust. We are often asked to deal with second-fix sealing on new plots and leaking shower tray seals in a new home, on plot handovers, kitchens and show homes.
Homes around Kemsing range from older cottages to newer houses, and their floors range just as widely, each moving in its own way. The sealant at skirtings and thresholds has to suit the floor it meets.
You’re covered for a year from the day we finish. If anything isn’t right with it, phone 0345 464 0079 or send us an email.
- Place
- Kemsing (TN15)
- Region
- Kent
- Cover
- A year, on every job
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
The process
The work is kept neat and contained to the joints we are treating, so you can carry on as normal. The job generally takes a few hours for most snagging lists, longer for a run of plots, and we tell you how long to leave it before we go. For a job in Kemsing, we agree the time, the access and parking before the day. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- First we work through your snagging list or plot schedule with you.
- Failed or untidy sealant is cut out completely.
- We clean off dust from the build and prime the surfaces where the product needs it.
- New sealant suited to each joint is applied and tooled neatly.
- Each area is checked and left with its cure time.
Getting ready for the visit
- Let us know about stairs, lifts or work at height
- Mention any sign-in or site rules at work premises
- Let us know if you’ve seen damp or leaks
How to get a quote
We quote each job on its own. Just ring 0345 464 0079 or send us an email with the details and send photos if you have them.
Advice
Towns and villages near Kemsing
Other services in Kemsing
New build mastic around Kemsing
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Around Kemsing, as everywhere, new build mastic is only as good as the preparation behind it.
Kemsing is about 2 miles north-east of Sevenoaks, in Kent. If you need new build mastic in Kemsing, it’s easy to get a quote: please call 0345 464 0079 or email us. We are based in Crawley and cover Kent, Kemsing included. 922 places in Kent are on our list. We also work in London, about 19 miles from Kemsing.
Every address in TN15 is within our area for new build mastic, from the main roads to the quietest streets. You will find streets such as High Street, Copperfields Walk and Childsbridge Lane. Close by, we work in Cotman's Ash (1 mile north-east), Heaverham (2 miles east), Woodlands (2 miles north-east), Romney Street (2 miles north) and Knatts Valley (2 miles north-east). We also work in nearby towns such as Maidstone (14 miles east), Dartford (9 miles north), Royal Tunbridge Wells (12 miles south), Gravesend (11 miles north-east), Tonbridge (8 miles south) and Northfleet (10 miles north-east).
Local landmarks in Kemsing
Around Kemsing, our work takes us to homes and buildings near St Michael's Preparatory School, Knole Academy and Kemsing Down and the streets around them. The closest station to Kemsing is Otford station, about 1 mile north-west of the centre. Other landmarks nearby include Kemsing Castle Bank (0.5 miles east) and Otford Heritage Centre (1 mile west). For a walk, there’s Dryhill Nature Reserve.
Kemsing: your questions answered
Do you cover Kemsing for new build mastic?
Yes, Kemsing is within the area we cover. We work across London and the South East. Just call 0345 464 0079 or drop us an email with a few details of the job.
Do you cover smaller places like Kemsing?
Yes, Kemsing is covered. Our work covers London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
What sealant do you use?
Products from Arbo and Everbuild, among others, picked for each joint. We’ll tell you what we’re using and why.
Are you an approved applicator?
Yes. We’re an ARBOMaster approved applicator, which is run for the Arbo sealant brand.
Can I add another job to the visit?
Of course. Doing several areas at once is generally more efficient, so mention them when you ask for a quote.
Can I do it myself?
You can, for simple jobs. The key is preparation: remove all the old material and work on a clean, dry joint. If it does not work out, we can redo it.
Do you take out the old sealant first?
Yes. All of the old material is cut out and the joint cleaned.
Can new sealant go on top of the old bead?
No. New silicone won’t bond to old silicone, so it soon lifts and traps water. We cut the old bead out completely.
Signs you need new build mastic in Kemsing
If plaster or screed was still damp when it was sealed, the bond suffers. On a busy site, joints aren’t always given time to dry before the sealant goes on.
The most common problems we see are:
- Joints pulling apart as timber shrinks
- Second-fix sealing on new plots
- Gaps behind new kitchen upstands
- Beads laid onto grit and dust from the build
For new homes near Otford station, it’s worth checking the sealant early, while snags are still fresh.
What your quote should include
- How the colour is chosen
- Whether all the old sealant comes out first
- Is VAT in the price?
- Whether the sealant suits the joint
Work for landlords, hotels and businesses
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we will quote.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
Looking after it afterwards
After the cure time, these simple habits help:
- Ventilate bathrooms well, especially in the first year
- Avoid running a DIY bead over the old one
- Wait for the cure time before using a resealed shower
- Look at the sealant regularly in the first couple of years
Photograph failed sealant before it’s redone and keep the builder’s replies. It’s useful if you need to raise other issues later.
Don’t let the snagging period run out with sealant problems unreported. Once it ends, the repair may be down to you.
What we can’t put right
We will not take on work that will not last, so here’s what sealant can’t put right:
- Plumbing faults behind the sealant
- Baths and trays that move too much for sealant to cope with
- Cracked trays, tiles or worktops
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we will tell you honestly before booking.
Joints and surfaces we work on
- Show homes
- Plot handovers
- Windows & doors
- Skirting & floors
- Bathrooms & en suites
- Kitchens
Why deal with it now?
A failed shower or bath seal in a new home lets water into floors and walls that are still drying out. Dealing with it early keeps the damage away from ceilings, floors and finishes. Around Kemsing, water from a failed joint in an older home can soak into timber and plaster, which is far harder to put right than the sealant itself.
Doing several joints on one visit is normally more efficient than separate visits, so tell us about everything that needs sealing. You’ll get one clear quote for the whole job.
What you get with us
- Neat joints and a tidy finish
- White, clear, grey or coloured to suit, where the product allows
- Experience in homes, commercial sites and hotels
- Fully insured
Take a look at how sealant jobs are priced and customer reviews.
DIY versus a professional finish
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
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.