Hampshire · England
New Build Mastic in Rockbourne
New build mastic in Rockbourne from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Gaps between new skirting and floors
- New-build shower sealant that has already split
- Sealant work across a run of new homes
New build mastic in Rockbourne
Some owners wait for the first year’s movement before having joints redone. That makes sense for small gaps that are just cosmetic, but a failed shower or bath seal shouldn’t wait. If you are dealing with sealant that never bonded to the surface and gaps behind new kitchen upstands, we can help.
Older homes in small places like Rockbourne 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 there’s a problem with our work within the year, let us know and we’ll sort it.
- Where
- Rockbourne (SP6)
- Wider area
- Hampshire
- Cover
- A year, on every job
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Signs you need new build mastic in Rockbourne
When the heating goes on in the first winter, the house dries fast. Gaps open along skirting, frames and worktops and cracks appear in the sealant.
People usually contact us after spotting something like this:
- Leaking shower tray seals in a new home
- Sealant work across a run of new homes
- Gaps between new skirting and floors
- Frame joints opening as the plaster dries
Around Rockbourne, as everywhere, new build mastic is only as good as the preparation behind it.
Questions to ask before you book
- How the colour is chosen
- How much experience the applicator has
- Whether they’re fully insured
- How the surfaces are prepared before sealing
What happens if it’s left?
DIY kits don’t solve the main problems with new-build sealant: dust, no primer and old sealant left in the joint. Cutting out, cleaning and priming are what make the difference. Around Rockbourne, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
No two jobs are quite the same, so each one gets its own quote. Size, access and the product the joint needs all make a difference, and we’ll explain the quote if you ask.
What you get with us
- A 12-month guarantee on all work
- Experience in homes, commercial sites and hotels
- ARBOMaster approved applicator
- Anti-fungal silicone where joints get wet
See what affects the cost or our reviews.
What new build mastic looks like in Rockbourne
Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Whether the job is in Rockbourne itself or nearby, the right material for each joint matters as much as a neat finish.
Rockbourne is in Hampshire. We carry out new build mastic for homeowners, landlords and businesses in Rockbourne and nearby. Our area takes in 683 places across Hampshire, from the larger towns to small villages. You can also see our page for Southampton, about 20 miles away.
Here we cover the SP6 postcode area for new build mastic. Nearby, we also carry out new build mastic in Whitsbury (1 mile north-east), Damerham (2 miles south), Sandleheath (2 miles south), Ashford (3 miles south-east) and Alderholt (4 miles south). We also work in nearby towns such as Totton (15 miles east), Ringwood (9 miles south), Fordingbridge (3 miles south-east), St Leonards (9 miles south), Brockenhurst (15 miles south-east) and Poulner (8 miles south).
Landmarks near Rockbourne
We work in homes and buildings around The Cart Wheel Public House. Other landmarks nearby include Fordingbridge Museum (3.3 miles south-east) and Godshill Castle Hill (3.5 miles south-east).
What we do, step by step
At the end, we look at the finished work together. The work normally takes a few hours in a single home, depending on how much there is to do. For a village or hamlet like Rockbourne, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- 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.
- Primer goes on where the surface and product need it, then the new sealant.
- Each bead is tooled and the cure times explained.
Preparing for the visit
- Tell us about any water getting in
- For business premises, tell us about site rules or sign-in
- Let us know about parking restrictions
How to get a quote
For a quick quote, get us on the phone, or email us if that’s easier. Tell us about the joints that need doing and we will talk you through the work.
Related advice
Landlord and commercial work in Rockbourne
Letting agents often deal with us directly. Tell us the address, the job and how access works.
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
Questions from Rockbourne
Do you cover smaller places like Rockbourne?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
What guarantee comes with new build mastic in Rockbourne?
All our work, in Rockbourne and everywhere else, comes with a 12-month guarantee. We’re also fully insured and ARBOMaster approved.
Should I wait before resealing?
If the seal has failed and water is getting in, do it now. Small gaps that are just cosmetic can be resealed once movement has slowed.
Can tenants book the work?
Yes. Check with your landlord; we can send the quote to them too.
Where is Mr Mastic based?
Mr Mastic is based in Crawley. Our applicators cover Rockbourne, along with the rest of our area.
What information do you need?
The location, the problem and the rough size of the job. Photos by email help too.
Are you fully insured?
Yes, we’re fully insured for every job we do.
Can new sealant go on top of the old bead?
No. New silicone will not bond to old silicone, so it soon lifts and traps water. We cut the old bead out completely.
DIY sealant or a professional job?
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
More services for Rockbourne
Honest limits
Before booking, it’s worth knowing the limits:
- Plumbing faults behind the sealant
- Cracking that points to a structural problem
- Your warranty claim itself, which is between you and the builder
If in doubt, call 0345 464 0079 or drop us an email and we’ll say what we think before you book.
Surfaces we seal
- Skirting & floors
- Kitchens
- Show homes
- Plot handovers
- Windows & doors
- Bathrooms & en suites
How the job changes by surface
Plot handovers
Send us the schedule and any sealant specification and we will quote. Sealant work across the plot is covered as agreed.
Bathrooms and en suites
New-build bathrooms and en suites are where sealant fails most often. We cut out the failed bead, clean and prime, and reseal with anti-fungal sanitary silicone.