Kent · England
New Build Mastic in Comp
Plot mastic for developers and snagging failed sealant in new homes for Comp, backed by a 12-month guarantee. Call for a quick quote.
- Cracked caulk along new skirting
- Sealant applied over dusty or wet surfaces
- Joints pulling apart as timber shrinks
How the job changes by surface
Show homes
Tired or marked sealant in a show home can be renewed. The old bead comes out and a clean new one goes in.
Windows and doors
Draughts around new frames are often a sealant gap. We look at the joints and reseal where needed.
How we handle new build mastic in Comp
A new build should have a neat, sound bead at every joint. When the finish is smeared, patchy or already cracking, it’s worth putting right early, before water gets into the floor or walls. Common call-outs are for shower seals failing in the first year or two and kitchen sealant that has pulled off the wall, across kitchens, plot handovers and windows & doors.
Around Comp, older homes often have timber floors that move through the year, so skirting and threshold joints need a flexible sealant rather than a rigid filler.
You’re covered for a year from the day we finish. If anything isn’t right with it, ring 0345 464 0079 or email us.
- Where
- Comp (TN15)
- Wider area
- Kent
- Guarantee
- A year, on every job
- Price
- A clear price before we start
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
New build mastic in Comp: local notes
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.
In and around Comp, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint. For new homes near Borough Green & Wrotham station, it’s worth checking the sealant early, while snags are still fresh.
Comp is about 3 miles west of Kings Hill, in Kent. From the centre of Comp to the outskirts, we cover new build mastic for every kind of property, from flats and houses to offices and hotels. We cover 922 towns and villages across Kent, large and small. Our London page covers work nearby, about 24 miles away.
Postcode districts we cover here for new build mastic: TN15. If you’re just outside Comp, we cover Platt (1 mile north-west), Wrotham Heath (1 mile north-east), Crouch (1 mile south-west), Claygate Cross (1 mile south-west) and Borough Green (1 mile west). Further out, we also cover Maidstone (8 miles east), Dartford (12 miles north-west), Sevenoaks (7 miles west), Royal Tunbridge Wells (11 miles south), Gravesend (10 miles north) and Tonbridge (7 miles south-west).
Landmarks near Comp
In Comp, that means homes and buildings near The Blue Anchor pub and Wrotham School and the streets around them. Comp’s nearest station is Borough Green & Wrotham station, about 1.5 miles west of the centre. Other landmarks nearby include Ightham Court (2.3 miles west) and Beechin Wood Archery Museum (under half a mile west).
Can I do it myself?
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
Looking after it afterwards
To keep the joints looking good and working properly:
- Keep photos and emails about snagging items
- Wipe joints with warm soapy water
- 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 while the sealant cures. Report any movement in a bath or tray.
A failed seal in a new home lets water into joists, plasterboard and ceilings. Catching it early keeps the fix to the sealant and the new finishes intact.
What we do, step by step
Good joint work is mostly preparation, so that’s where we spend the time. Joints are cleaned back and dried before anything new goes in. In total, it normally takes a few hours for most snagging lists, longer for a run of plots. Somewhere as small as Comp, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- First, the list of joints is agreed from your snagging sheet or plot schedule.
- Every bit of the old builder’s sealant is cut out down to clean surfaces.
- Joints are vacuumed and cleaned of building dust.
- We prime where needed and apply a sealant suited to each joint.
- Each bead is tooled and the cure times explained.
Preparing for the visit
- Keep children and pets away from the work area
- Tell us about any water getting in
- Where the joints are inside, avoid wetting them before we arrive
Ask for a quote
We quote each job on its own. Simply phone 0345 464 0079 or send us an email and describe the job and send photos if you have them.
Advice
What happens if it’s left?
It often makes sense to do all the sealant items on a snagging list together. It’s one visit, one quote and one set of cure times. Around Comp, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
There are no prices on our website, because the cost depends so much on the job itself. For a quick quote, please phone 0345 464 0079 or drop us an email and we will talk you through it.
Why Comp clients choose us
- Old sealant always removed completely
- 20+ years of sealant experience
- 180+ five-star Google reviews
- White, clear, grey or another colour, product permitting
See our cost guide or what customers say.
Also in Comp
FAQs for Comp
Can you do new build mastic in Comp?
Yes. Our work covers London and the South East, and Comp is part of that. You can ring 0345 464 0079 or drop us an email and tell us what needs doing.
I let a flat near Borough Green & Wrotham station. Can you help?
Yes. We work for landlords and agents as well as homeowners, and several properties can be quoted together. You can ring 0345 464 0079 or drop us an email with the details for a clear quote.
Do you have insurance?
Yes. We’re fully insured.
When is the sealant fully cured?
That depends on the sealant used, so follow the cure time we give you when we finish.
Will it make a mess?
Not at all. The area is protected while we work and cleaned up afterwards.
Do you work through snagging lists?
Yes. Send it with photos and we will quote for the sealant items. If something is not sealant, we’ll say so.
Do you guarantee your work?
Yes. All our work carries our 12-month guarantee.
Do you take out the old sealant first?
Yes. Sealing over the old bead is the commonest cause of early failure, so we never do it.
How we quote for new build mastic
Your quote is based on your job. We look at:
- Any mould that needs treating
- The number and length of the joints
- How easy the joints are to reach
- Which sealant suits the joint
What it costs depends on the size of the job, how hard the old material is to remove and how easy the joints are to reach. You will have a clear quote before any work starts, so you know where you stand.
What we need to know
Before you ask for a quote, have a think about:
- Pictures of the joints, sent by email
- How many joints, rooms or windows are involved
- What’s wrong with the joints now
- Whether it has been sealed before
It all starts with a short chat. Describe the problem, the location and the size of the job. Whenever you are ready, ring 0345 464 0079 or email us.
When something else is needed
Some problems need a builder, plumber or other trade rather than us:
- Movement caused by a poorly fitted tray or bath
- Damaged fittings that need replacing
- Disputes or warranty claims with your builder
If in doubt, call 0345 464 0079 or drop us an email and we will say what we think before booking.
Joints and surfaces we work on
- Kitchens
- Bathrooms & en suites
- Windows & doors
- Show homes
- Plot handovers
- Skirting & floors