Medway · England
New Build Mastic in Upper Upnor
Plot mastic for developers and snagging failed sealant in new homes for homes and businesses in Upper Upnor and across Medway. Fully insured, ARBOMaster approved and guaranteed for a year.
- Gaps between new skirting and floors
- Worktop and upstand sealant coming away
- Sealant work across a run of new homes
How we handle new build mastic in Upper Upnor
Some new-home owners let the house settle before resealing. That makes sense for small gaps that are just cosmetic, but a seal that is letting water through needs doing now. We work on show homes, skirting & floors and kitchens, and common reasons people get in touch are gaps behind new kitchen upstands and beads laid onto grit and dust from the build.
Work in a small place like Upper Upnor just needs the journey and access planning, and once on site, the job is the same as anywhere.
All of our work is guaranteed for twelve months.
- Location
- Upper Upnor (ME2)
- Region
- Medway
- Guarantee
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
The process
Good joint work is mostly preparation, and we do not rush it. Joints are cleaned back and dried before anything new goes in. In total, it normally takes a few hours for most snagging lists, longer for a run of plots. In a small place like Upper Upnor, access is usually the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We start by agreeing which joints are on the list, from the snagging sheet or plot schedule.
- Failed or untidy sealant is cut out completely.
- Surfaces are cleaned of building dust and primed where needed.
- New sealant suited to each joint is applied and tooled neatly.
- Each area is checked and left with its cure time.
Preparing for the visit
- Mention any tricky access
- Mention any leaks or damp you’ve noticed
- For indoor joints, keep the area dry beforehand if you can
How to get a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and email pictures if that is easy.
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New build mastic around Upper Upnor
Upper Upnor is close to the coast. Plot mastic on new homes near the coast takes more weather than it would inland, so it’s worth checking at snagging. The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Around Upper Upnor, as everywhere, new build mastic is only as good as the preparation behind it. For new homes near Strood station, it’s worth checking the sealant early, while snags are still fresh.
Upper Upnor is about 2 miles north-east of Rochester, in Medway. Whether you’re in the middle of Upper Upnor or further out, new build mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Our area takes in 68 places across Medway, from the larger towns to small villages. There’s also a page for Chelmsford, about 23 miles away.
Jobs for new build mastic in ME2 is quoted and booked the same way as anywhere else. If you need new build mastic at a property on High Street, Upnor Road and Castle Street or a nearby road, our applicators can take on the job. Neighbouring places we cover for new build mastic include Lower Upnor (1 mile north-east), Wainscott (1 mile north-west), Chattenden (1 mile north), Hoo St Werburgh (2 miles north-east) and Cooling Street (3 miles north). Further out, we also cover Gillingham (3 miles south-east), Chatham (3 miles south), Rainham (5 miles south-east), Luton (3 miles south), Park Wood (5 miles south-east) and Lordswood (5 miles south).
Local landmarks in Upper Upnor
We work in homes and buildings around The Kings Arms, Lower Lines Park and Waterfront University Technical College. Nearby too are Former Ordnance Store At Chatham Gun Wharf (1.4 miles south) and Waterfront UTC (1.3 miles south-east). The nearest railway station is Strood station, about 1.2 miles south-west. Other landmarks nearby include French Hospital (1.5 miles south-west) and Pentagon Shopping Centre (1.6 miles south). Green spaces nearby include Gad's Hill and Rede Common.
Why deal with it now?
Water getting past a failed seal in a new build reaches walls and floors that are still settling. Dealing with it early keeps the damage away from ceilings, floors and finishes. Around Upper Upnor, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
The cost depends on the size of the job, how much old material has to come out and how easy the joints are to reach. We give a clear quote before work begins, so you know where you stand.
Why us?
- An ARBOMaster approved applicator
- Trusted Arbo and Everbuild sealants
- White, clear, grey or coloured to suit, where the product allows
- A sealant colour to suit the surroundings
Take a look at what affects the cost and what customers say.
Upper Upnor: your questions answered
Do you cover Upper Upnor for new build mastic?
Yes, Upper Upnor is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or email us and let us know what needs doing.
Do you work for landlords with property near Strood station?
Yes. We work for landlords and agents as well as householders, and several properties can be quoted together. You can phone 0345 464 0079 or drop us an email with the details for a clear quote.
How much does new build mastic cost in Upper Upnor?
The cost depends on the size of the job, access and how much old sealant has to come out. Ask us for a quote.
Do you guarantee your work?
Yes, for a year. If there’s a problem with our work in that time, tell us and we’ll put it right.
Do you take out the old sealant first?
Yes. All of the old material is cut out and the joint cleaned before applying anything new.
When is the best time to reseal in a new build?
It depends on whether water is getting through. Failed seals in wet areas need doing now, while small cosmetic gaps can wait a while.
Do you take on second-fix sealing for builders?
Yes. Plot mastic and second-fix sealing for developers is part of our work. Send the schedule and any specification and we will give you a quote.
Can you work from my snagging list?
Yes. Send us the sealant items on the list, with photos if you can and we will give you a quote. We will flag anything that needs another trade.
Should I try it myself first?
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.
Nearby places to Upper Upnor
What else we do in Upper Upnor
What the job involves on each surface
Show homes
We seal show-home bathrooms, kitchens and frames. Tell us when the home is open so we can plan around it.
Skirting and floors
Gaps under skirting are one of the most common new-build snags. A flexible sealant closes it without cracking like caulk.
Looking after it afterwards
Looking after new joints is easy:
- Watch for new gaps as the house dries out
- Keep water off fresh sealant until it has cured
- Photograph failed sealant before it’s redone
- Clean sealant with mild detergent, not abrasives
Photograph failed sealant before it’s redone and keep the builder’s replies. It helps if anything else comes up during the warranty period.
Early snagging is easier snagging. Small faults turn into leaks if left over time.
Landlord and commercial work in Upper Upnor
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. We can quote for more than one property at once.
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance.
What sealant work can’t fix
We’ll always be straight with you, so here’s what sealant cannot fix:
- Cracked trays, tiles or worktops
- Deciding who is responsible under a builder’s warranty
- Movement caused by a poorly fitted tray or bath
If you are not sure, just ring 0345 464 0079 or drop us an email and we’ll give you a straight answer.
What we seal
- Plot handovers
- Windows & doors
- Skirting & floors
- Kitchens
- Show homes
- Bathrooms & en suites