Kent · England
Round Street New Build Mastic
New-build sealant joints in Round Street need attention? We cut out the old, prepare the joints and apply the right sealant.
- Joints pulling apart as timber shrinks
- Untidy sealant flagged on a snagging list
- New-build shower sealant that has already split
How the job changes by surface
Skirting and floors
As timber and screed dry, skirting and floors shift. We use a flexible product rather than caulk in a colour to suit.
Show homes
Bathrooms, kitchens and frames in show homes are sealed or resealed to a neat finish. Tell us when the home is open so we can plan around it.
How we handle new build mastic in Round Street
Some owners wait for the first year’s movement before having joints redone. For small cosmetic gaps, that’s reasonable, but a failed shower or bath seal shouldn’t wait. We work on skirting & floors, windows & doors and kitchens, and common reasons people get in touch are new-build shower sealant that has already split and frame joints opening as the plaster dries.
Around Round Street, 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.
A one-year guarantee comes with the work, just as it does everywhere we cover.
- Location
- Round Street (DA13)
- Region
- Kent
- Guarantee
- One year on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Towns and villages near Round Street
Other services in Round Street
What affects the quote in Round Street
There’s no set price list, because no two jobs are the same. The quote depends on:
- Mould in or behind the old joints
- Any working-time requirements on site
- The number of rooms or windows
- How much old sealant there is and how hard it is to remove
Instead of a standard rate, we price the job in front of us: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Helping us quote
Photos by email are helpful but not essential. Please mention:
- Pictures of the joints, sent by email
- Where the job is, and your postcode
- What’s wrong with the joints now
- Whether it has been sealed before
Call for a quick quote, or send an email if you’d rather. Describe what needs sealing and we will talk you through the work.
The process
We work through the job in order: protection first, then preparation, sealing and a tidy-up. For most jobs that takes a few hours for most snagging lists, longer for a run of plots, and the area is left clean. Somewhere like Round Street needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- We go through the snagging list or plot schedule and agree the joints to do.
- 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.
- A sealant chosen for each area goes in and is tooled smooth.
- Finally, each room is checked and you’re given the cure time.
Getting ready for the visit
- For indoor joints, keep the area dry beforehand if you can
- Clear the area around the work
- Tell us about any previous sealing or DIY attempts
Get a quote
Quotes start with a quick conversation. Describe the problem, the location and the size of the job. Whenever you’re ready, call 0345 464 0079 or email us.
Advice
DIY versus a professional finish
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
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.
Aftercare tips
Joint life depends on how it’s used and looked after. We suggest:
- Avoid running a DIY bead over the old one
- Record problems with dated pictures
- Report sealant problems to your builder during the snagging period
- Ventilate bathrooms well, especially in the first year
Leave the sealant for the cure time we give you before showering or bathing. Most silicones need around a day.
A failed seal in a new home lets water into joists, plasterboard and ceilings. Early resealing keeps the job small.
Round Street questions
Is Round Street in your area for new build mastic?
Yes. Our work covers London and the South East, and Round Street is part of that. You can phone 0345 464 0079 or send us an email and tell us what needs doing.
Can you help a landlord with a rental near Sole Street station?
Yes, rental work is part of what we do. You can call 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before any work starts.
Why does sealant fail so quickly in new builds?
Lots of new homes see sealant crack early. Rushed application on dusty surfaces makes it worse.
Is it worth trying it myself?
Some simple jobs can be done by a careful DIYer. Most DIY failures come from sealing over old material, wet joints or too much sealant.
Are you insured?
Yes. Mr Mastic is fully insured, with over 20 years’ experience in sealant work.
Will you just run a new bead over the existing one?
No. Fresh silicone doesn’t stick to the old layer, so sealing over the top fails quickly. We cut the old bead out completely.
How do I get a quote for new build mastic in Round Street?
Size, access and the old material all affect the cost. Ask us for a quote.
Will there be a smell?
There can be a smell while the sealant cures, which fades as it sets. Opening a window helps.
Honest limits
We won’t take on work that will not last, so here’s what sealant cannot put right:
- Leaks from pipes, valves or wastes, which need a plumber
- Settlement cracks that need a surveyor
- Deciding who is responsible under a builder’s warranty
Not sure which it is? You can call 0345 464 0079 or drop us an email and we’ll tell you honestly before booking.
Where we work in Round Street
- Skirting & floors
- Bathrooms & en suites
- Show homes
- Plot handovers
- Kitchens
- Windows & doors
Why it’s worth doing now in Round Street
Sealant done properly at handover means fewer callbacks. Every return visit for a failed seal takes time and most come down to preparation. Older cottages and farmhouses around Round Street can have timber floors and frames, and water through a failed joint can rot timber 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 play a part, and we’ll explain the quote if you ask.
Why Round Street clients choose us
- Every job guaranteed for a year
- 180+ five-star Google reviews
- Full insurance on every job
- Tidy, careful work
New homes and floors in Round Street
Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For new homes near Sole Street station, it’s worth checking the sealant early, while snags are still fresh. In and around Round Street, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Round Street is about 3 miles south of Gravesend, in Kent. For new build mastic in and around Round Street, please ring 0345 464 0079 or email us for a quick quote. We’re based in Crawley and cover Kent, Round Street included. 922 places in Kent are on our list, large and small. London is on our list too, about 22 miles from Round Street.
Jobs for new build mastic in DA13 works the same way as everywhere else we cover. Close by, we work in Sole Street (1 mile south), Gold Street (1 mile south-east), Nash Street (1 mile west), Meopham (1 mile south-west) and Henley Street (1 mile south-east). Larger places within reach include Maidstone (11 miles south-east), Dartford (8 miles north-west), Sevenoaks (11 miles south-west), Gravesend (3 miles north), Tonbridge (14 miles south) and Northfleet (3 miles north-west).
Around Round Street
We work in homes and buildings around The Railway Inn, Jeskyns and Meopham School. The closest station to Round Street is Sole Street station, about 0.6 miles south of the centre. A little further out are Gravesham Museum (3.5 miles north) and Gravesham Community Hospital (3.6 miles north). For a walk, there’s Gad's Hill and Ranscombe Farm.