Hampshire · England
New-build mastic & snagging in Crofton, Hampshire
Professional new build mastic in and around Crofton, with old sealant always removed completely and a 12-month guarantee.
- Plot mastic for developers ahead of handover
- Gaps behind new kitchen upstands
- Joints pulling apart as timber shrinks
New build mastic for homes and businesses in Crofton
We carry out plot mastic and second-fix sealing for builders, and snagging reseals for new-home owners. Both get the same care over preparation since hurried prep is behind a lot of new-build failures. Common call-outs are for sealant that never bonded to the surface and gaps opening as the house dries out and settles, across show homes, kitchens and skirting & floors.
For a small place like Crofton, the journey and access are planned in advance, and the work itself is the same as on any site.
You’re covered for a year from the day we finish. If there’s a problem with it, please phone 0345 464 0079 or drop us an email.
- Where
- Crofton (PO14, PO13)
- Region
- Hampshire
- Cover
- A year, on every job
- Quotes
- A clear price before work begins
- Call
- 0345 464 0079
- Updated
- 26 October 2026
The process
Most of a good job is in the preparation, so that’s where we spend the time. Every joint is cleaned and dried before new material goes in. In total, it normally takes a few hours in a single home. For a village or hamlet like Crofton, 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.
- First we work through your snagging list or plot schedule with you.
- 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.
- New sealant suited to each joint is applied and tooled neatly.
- We check every joint and tell you how long each needs to cure.
Preparing for the visit
- Tell us about any water getting in
- For indoor joints, keep the area dry beforehand if you can
- Plan for the work area to be out of bounds to pets and children
Get a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we’ll explain what’s involved before giving you a price.
Read more
DIY sealant or a professional job?
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Looking after it afterwards
Simple care keeps the joints in good condition. Our advice:
- Get a leaking seal dealt with straight away
- Avoid scourers and strong chemicals on sealant
- Open a window or run the fan after bathing
- Raise failed sealant with the developer while you are covered
Keep an eye on the joints over the first couple of years. Hairline gaps can open as timber and plaster dry.
Do not let the snagging period run out with sealant problems unreported. After that, putting it right may fall to you, so raise it early.
Also near Crofton
Other services in Crofton
Quotes for new build mastic in Crofton
Jobs vary more than people expect. What affects the quote:
- Access and height
- Whether old sealant or filler has to be cut out
- The type of sealant required
- How many rooms, windows or areas are involved
No two jobs are quite the same, so each one gets its own quote. Size, access and the product the joint needs all play a part.
Asking for a quote
To make quoting easier, please include:
- Pictures of the joints, sent by email
- Where the job is, and your postcode
- Whether it has been sealed before
- Any access issues, like height or stairs
We quote each job on its own, so the first step is telling us about yours. Just phone 0345 464 0079 or drop us an email with the details.
What we cannot put right
Honest advice matters more to us than a booking, so here’s what new sealant will not do:
- Cracking that points to a structural problem
- Leaks from pipes, valves or wastes, which need a plumber
- Disputes or warranty claims with your builder
If you are not sure, just phone 0345 464 0079 or send us an email and we will give you a straight answer before booking.
Surfaces we seal
- Windows & doors
- Bathrooms & en suites
- Plot handovers
- Skirting & floors
- Kitchens
- Show homes
Landlords, agents and businesses in Crofton
Mouldy or split sealant often shows up at the end of a tenancy. We can quote for more than one property at once.
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
Crofton: your questions answered
Do you cover smaller places like Crofton?
Yes. Crofton is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Do you cover Crofton for new build mastic?
Yes. Our work covers London and the South East, and Crofton is part of that. You can ring 0345 464 0079 or email us and let us know what needs doing.
Do you work for landlords and businesses?
Yes, often. Several properties can go on one quote.
Can you reseal over the builder’s sealant?
No. Fresh silicone doesn’t stick to the old layer, so it soon lifts and traps water. We cut the old bead out completely.
What do you put in the joint?
It depends on the joint: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. We use products from Arbo and Everbuild.
Do you take on second-fix sealing for builders?
Yes. We work through plots to your schedule ready for handover. Get in touch with the number of plots and the scope for a clear quote.
Where is Mr Mastic based?
Mr Mastic is based in Crawley. Our applicators cover Crofton.
Do you guarantee your work?
Yes. All our work carries our one-year guarantee.
Surface by surface
Show homes
Tired or marked sealant in a show home can be renewed. We cut it out and reseal neatly.
Plot handovers
We work through plots to your schedule, sealing each room ready for handover. Each joint is cleaned and primed where needed.
New build mastic around Crofton
Crofton is within about 1 mile of the coast. New homes near the sea put their outside mastic to work from day one, so any gaps are best picked up early. London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you’ve bought a new home near Fareham station, the sealant around baths, showers and frames is worth checking in the first year or two. In and around Crofton, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Crofton is about 1 mile east of Stubbington, in Hampshire. We provide new build mastic to householders, landlords and businesses in Crofton and nearby, as part of our work across Hampshire. Crofton is one of 683 towns and villages in Hampshire where we work for new build mastic.
Work in PO14 and PO13 works the same way as everywhere else we cover. Whether your property is on Mark's Road, Gosport Road and Newgate Lane or anywhere close by, we can help. If you’re just outside Crofton, we cover Peel Common (1 mile east), Rowner (1 mile east), Bridgemary (1 mile east), Lee-on-the-Solent (1 mile south) and Fareham (2 miles north). Larger places within reach include Havant (10 miles east), Eastleigh (12 miles north-west), Horndean (10 miles north-east), Totton (15 miles north-west), Chandler's Ford (14 miles north-west) and Hedge End (8 miles north-west).
What’s near Crofton
We work in homes and buildings around Baycroft School and Peel Common Infant School and Nursery Unit. The closest station to Crofton is Fareham station, about 2.1 miles north of the centre. Well-known places in the area include Gosport War Memorial Hospital (3 miles south-east) and Carron Row Farm Museum (3 miles north-west). The countryside around Crofton includes Portsdown Hill and West of the River Alver.