Hampshire · England
New-build mastic & snagging in Carter's Clay, Hampshire
New build mastic for Carter's Clay and the surrounding area: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Leaking shower tray seals in a new home
- Cracks appearing as a new home settles
- Plot mastic for developers ahead of handover
How we handle new build mastic in Carter's Clay
We never seal over a failed new-build bead. Fresh silicone can’t bond to the old layer, so the joint is cut out, cleaned, dried and resealed. We work on kitchens, bathrooms & en suites and windows & doors, and people most often call us about cracks appearing as a new home settles and shower seals failing in the first year or two.
For a small place like Carter's Clay, the journey and access are planned in advance, and the work itself is the same as on any site.
There’s a 12-month guarantee on every job, whatever its size.
- Where
- Carter's Clay (SO51)
- Region
- Hampshire
- Cover
- 12 months on all our work
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
What the job involves on each surface
Plot handovers
We work through plots to your schedule, sealing each room ready for handover. Each joint is cleaned and primed where needed.
Skirting and floors
Gaps under skirting are one of the most common new-build snags. We seal it with a flexible sealant that copes with the movement.
What new build mastic looks like in Carter's Clay
London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For new homes near Mottisfont & Dunbridge station, it’s worth checking the sealant early, while snags are still fresh.
Carter's Clay is about 4 miles north-west of Romsey, in Hampshire. Our applicators cover new build mastic for householders, landlords and businesses in Carter's Clay. Carter's Clay is one of 683 places in Hampshire we cover for new build mastic. For nearby work, see our Southampton page, about 10 miles away.
Jobs for new build mastic in SO51 is quoted and booked the same way as anywhere else. We cover properties on The Banks and Carter's Clay Road. If you are just outside Carter's Clay, we cover Lockerley (1 mile north-west), Awbridge (1 mile south-east), Dunbridge (1 mile north-east), Kimbridge (2 miles north-east) and Sherfield English (2 miles south-west). We also work in nearby towns such as Winchester (11 miles east), Eastleigh (10 miles east), Andover (14 miles north), Totton (7 miles south), Chandler's Ford (8 miles east) and Hedge End (13 miles south-east).
Local landmarks in Carter's Clay
In Carter's Clay, that means homes and buildings near Kings Arms Public House and the streets around them. Carter's Clay’s nearest station is Mottisfont & Dunbridge station, roughly 1.2 miles north-east of the centre. Other landmarks nearby include Romsey Community Hospital (4 miles south-east) and King Johns House (3.4 miles south-east).
What we cannot put right
Honest advice matters more to us than a booking, so here’s what sealant cannot fix:
- Movement caused by a poorly fitted tray or bath
- Settlement cracks that need a surveyor
- Plumbing faults behind the sealant
If you are not sure, just call 0345 464 0079 or send us an email and we will give you a straight answer before you book.
What we seal
- Plot handovers
- Skirting & floors
- Windows & doors
- Kitchens
- Bathrooms & en suites
- Show homes
Keeping the joints in good condition
A little care helps the new joints last. Our advice:
- Record problems with dated pictures
- Resist patching a failed seal with a tube from the DIY shop
- Keep water off fresh sealant until it has cured
- Report sealant problems to your builder during the snagging period
Leave the sealant for the cure time we give you before showering or bathing. Silicone is generally left for about a day to cure enough for use.
Early snagging is easier snagging. Small faults turn into leaks if left in a busy bathroom.
What we are called out for in Carter's Clay
Sealant is often one of the last jobs before handover. Dusty, unprimed joints are common, so the bead never bonds properly.
Any of these means the joints need attention:
- Cracked caulk along new skirting
- Joints pulling apart as timber shrinks
- Sealant work across a run of new homes
- Messy sealant that spoils new finishes
Around Carter's Clay, as everywhere, new build mastic is only as good as the preparation behind it.
Before you book anyone
- Whether all the old sealant comes out first
- How the surfaces are prepared before sealing
- Which colour the sealant will be
- Who turns up on the day
The process
Before we leave, we go over the finished joints with you. The visit itself generally takes anything from a few hours to several days, depending on the number of plots, depending on the size of the job. Somewhere like Carter's Clay needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- Each joint is checked for movement before we start.
- We remove the failed sealant and clean the joints.
- Joints are dried and primed where the product calls for it.
- Baths are filled with water, then the new sealant is applied.
- The finished joints are checked and the cure times given.
Before we arrive
- Let us know about parking restrictions
- Keep children and pets away from the work area
- Try not to wet indoor joints just before the visit
Get a quote
Need a quote? Please phone 0345 464 0079 or email us with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.
Read more
What affects the quote in Carter's Clay
We quote each job individually. These are the things that affect it:
- Which sealant suits the joint
- How much old sealant there is and how hard it is to remove
- How many areas need sealing
- How easy the joints are to reach
The cost 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.
Asking for a quote
When you call or email, these details help:
- The problem you’ve noticed
- Pictures of the joints, sent by email
- How many joints, rooms or windows are involved
- Access, such as stairs, a lift or height
Every job is quoted individually, so the first step is telling us about yours. Just call 0345 464 0079 or email us with the details.
Carter's Clay: your questions answered
Can you do new build mastic in Carter's Clay?
Yes. Our work covers London and the South East, and Carter's Clay is part of that. Just ring 0345 464 0079 or send us an email with a few details of the job, and we will send you a clear quote.
Can you help a landlord with a rental near Mottisfont & Dunbridge station?
Yes. We work for landlords and agents as well as householders. Just call 0345 464 0079 or send us an email with the address and what needs doing, and we’ll give you a clear quote.
Should I try DIY first?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Which products do you use?
Each joint gets the product that suits it. Where it moves, gets wet or faces the weather makes a difference, and we’ll tell you what we are using.
How long does new build mastic take?
As a guide, most jobs take anything from a few hours to several days, depending on the number of plots. Bigger jobs take longer, and we’ll say how long yours will take.
What should I tell you?
The location, the problem and the rough size of the job. Photos by email help too.
Will the old sealant be removed?
Yes, every time. New silicone does not stick to old silicone, so any old material comes out before anything new goes in.
Is there a guarantee?
Yes, for a year. If anything is not right with the work within the year, let us know and we’ll sort it.
Why deal with it now?
A quick bead over the top of the old sealant can look fine at first, but it cannot bond to what’s underneath. Taking it all out and starting again is the only way to get a lasting seal. Older cottages and farmhouses around Carter's Clay can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
Every job is a little different, so we quote each one individually. Size, access and the product the joint needs all play a part, and we’ll explain the quote if you ask.
Why choose Mr Mastic in Carter's Clay
- Quality sealants from Arbo and Everbuild
- Any old sealant cut out fully, not covered over
- We agree the colour with you first
- Homes, businesses and hotels
See our cost guide and what customers say.