Hampshire · England
New Build Mastic in The Frenches
Plot mastic for developers and snagging failed sealant in new homes in The Frenches, with a one-year guarantee on every job. Call for a quick quote.
- Frame joints opening as the plaster dries
- Sealant work across a run of new homes
- Cracked caulk along new skirting
Why act early in The Frenches
A tube of sealant from the DIY shop will not fix the cause: grit, unprimed surfaces and old layers underneath. Cutting out, cleaning and priming are what make the difference. Where a wall is exposed, as many are in small places like The Frenches, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Every job is a little different, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all make a difference, and we will explain the quote if you ask.
Why us?
- Quality sealants from Arbo and Everbuild
- An ARBOMaster approved applicator
- We leave the area clean and tidy
- Old sealant always removed completely
Take a look at what affects the cost or our reviews.
New build mastic for homes and businesses in The Frenches
Developers send us the plot schedule and we work through it. We seal bathrooms, kitchens, windows, doors and skirting so plots are ready to hand over with a sealant suited to each area. We work on kitchens, plot handovers and bathrooms & en suites, and people most often call us about cracks appearing as a new home settles and skirting joints opening in the first winter.
Older homes in small places like The Frenches often have timber floors that move with the seasons, which is why skirting and threshold joints need a flexible sealant, not filler.
We guarantee the work for a year. If something is not right with it in that time, tell us and we’ll put it right.
- Location
- The Frenches (SO51)
- Wider area
- Hampshire
- Cover
- A year, on every job
- Price
- A clear price before we start
- Call
- 0345 464 0079
- Updated
- 26 October 2026
New homes and floors in The Frenches
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.
Around The Frenches, as everywhere, new build mastic is only as good as the preparation behind it.
The Frenches is about 3 miles west of Romsey, in Hampshire. We provide new build mastic to homeowners, landlords and businesses in The Frenches and the surrounding area. The Frenches is one of 683 places in Hampshire we cover for new build mastic. You can also see our page for Southampton, about 9 miles away.
We cover every part of the SO51 postcode area for new build mastic. Close by, we work in Shootash (1 mile east), Plaitford Green (2 miles west), West Wellow (2 miles south-west), East Wellow (2 miles south) and Blackhill (3 miles south). We also work in nearby towns such as Winchester (11 miles east), Eastleigh (10 miles east), Andover (15 miles north), Totton (6 miles south-east), Chandler's Ford (8 miles east) and Hedge End (13 miles south-east).
Near you in The Frenches
The nearest railway station is Mottisfont & Dunbridge station, about 2.5 miles north. Nearby you’ll also find King Johns House (2.7 miles east) and Romsey Community Hospital (3.4 miles east). Not far away are Copythorne Common.
What we’re called out for in The Frenches
The first winter with the heating on dries a new home quickly. Gaps open along skirting, frames and worktops and cracks appear in the sealant.
Keep an eye out for these signs:
- Sealant applied over dusty or wet surfaces
- Worktop and upstand sealant coming away
- Joints pulling apart as timber shrinks
- Frame joints opening as the plaster dries
For new homes near Mottisfont & Dunbridge station, it’s worth checking the sealant early, while snags are still fresh.
Before booking anyone
- Is VAT in the price?
- Whether you can choose the colour
- Is the old sealant removed completely?
- Who turns up on the day
Towns and villages near The Frenches
Other services in The Frenches
Common questions in The Frenches
Do you cover smaller places like The Frenches?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Do you work for landlords with property near Mottisfont & Dunbridge station?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or send us an email and tell us about the property, and we’ll give you a clear quote.
Who should fix failed sealant in a new build?
Report it to the builder first while you are covered. Once that is done, or if they will not put it right, we can reseal it properly.
Is there a guarantee?
Yes. There’s a 12-month guarantee on every job, large or small.
How long should I leave it?
That depends on the sealant used, so please follow the time we give you when we finish.
Can you work from my snagging list?
Yes. Send it with pictures and we’ll quote for the sealant items. If something is not sealant, we’ll say so.
Will you leave a mess?
No. We protect the surfaces around the joints, and we clear up the old sealant and our materials before we leave.
Do you take out the old sealant first?
Yes. We cut out all the old sealant and clean the joint before applying anything new.
How we quote for new build mastic
There’s no set price list. What we look at:
- The amount of work
- Whether the work is at height
- Any mould that needs treating
- The type of sealant required
The cost depends on the amount of work, how hard the old material is to remove and access to the work. We give a clear quote before we start.
What we need to know
What to tell us when you ask for a quote:
- The problem you’ve noticed
- How many joints, rooms or windows are involved
- Any access issues, like height or stairs
- A few photos by email, if you can
Every job is quoted individually. Just call 0345 464 0079 or email us with the details, and photos are welcome.
Different surfaces, different methods
Show homes
We can refresh show-home sealant that has discoloured or been knocked. We cut it out and reseal neatly.
Plot handovers
We work through plots to your schedule, sealing each room ready for handover. Joints are prepared properly before sealing.
DIY versus a professional finish
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
What we do, step by step
At the end, we look at the finished work together. The visit itself generally takes a few hours for most snagging lists, longer for a run of plots, depending on the size of the job. In a small place like The Frenches, access is generally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We start by going through the snagging items or plot schedule with you.
- Every bit of the old builder’s sealant is cut out.
- Joints are vacuumed and cleaned of building dust.
- Primer goes on where the surface and product need it, then the new sealant.
- Each bead is tooled and the cure times explained.
Before we arrive
- Clear the area around the work
- Let us know if you’ve seen damp or leaks
- On commercial sites, let us know about site rules
Get a quote
Asking for a quote is easy: let us know the job and the location and its rough size. Photos by email help us understand the job.
Read more
Work for landlords, hotels and businesses
If you manage several properties in or around The Frenches, several properties can go on one quote. Send us the addresses and the work at each.
We regularly work with letting and managing agents. Tell us the address, the job and how access works.