Kent · England
New-build mastic & snagging in St Lawrence, Kent
New build mastic in St Lawrence from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Frame joints opening as the plaster dries
- Joints pulling apart as timber shrinks
- Shower seals failing in the first year or two
New build mastic in St Lawrence
Dust is the enemy of new-build sealant. We clean every joint thoroughly and prime where the surface and product need it, so the sealant actually sticks rather than sitting on a layer of grit. Typical jobs include second-fix sealing on new plots and sealant that never bonded to the surface, on kitchens, plot handovers and skirting & floors.
In and around St Lawrence, floors range from older timber boards to tiles and newer finishes, from timber that moves with the seasons to tiles laid on concrete. The sealant at skirtings and thresholds has to suit the floor it meets.
Big or small, you get the same 12-month guarantee in St Lawrence and across Kent.
- Where
- St Lawrence (CT11, CT12)
- Wider area
- Kent
- Cover
- A year, on every job
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
What we can’t put right
A few problems are outside what sealant work can do:
- Deciding who is responsible under a builder’s warranty
- Leaking fittings rather than failed sealant
- Damaged fittings that need replacing
If in doubt, call 0345 464 0079 or send us an email and we’ll say what we think before booking.
What we seal
- Kitchens
- Show homes
- Bathrooms & en suites
- Windows & doors
- Plot handovers
- Skirting & floors
How the job changes by surface
Windows and doors
External mastic around new windows and doors is sometimes rushed or missed. We reseal it with a weatherproof, flexible sealant.
Skirting and floors
New homes often develop a gap between skirting and floor. A flexible sealant closes it without cracking like caulk.
How it works
You don’t need to clear the whole room or building before we come, just the space around the work. Everything nearby is protected, and the work takes anything from a few hours to several days, depending on the number of plots in most cases. In a smaller place like St Lawrence, parking is seldom the issue; lanes, gates and long drives are worth mentioning. For outside work, side access and the height of the joints help us plan.
- 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, with no layer left behind.
- 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 access, such as stairs, a lift or high-level joints
- For business premises, tell us about site rules or sign-in
- Let us know about parking restrictions
How to get a quote
There’s no standard price list, as no two jobs are quite the same. Instead, we send you a clear quote for your job. To arrange one, ring 0345 464 0079 or send us an email.
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What we are called out for in St Lawrence
If plaster or screed was still damp when it was sealed, the bond suffers. On a busy site, joints are not always given time to dry before the sealant goes on.
Look out for these signs:
- Leaking shower tray seals in a new home
- Cracked sealant around new window and door frames
- Plot mastic for developers ahead of handover
- Kitchen sealant that has pulled off the wall
For new homes near Ramsgate station, it’s worth checking the sealant early, while snags are still fresh.
What your quote should include
- What guarantee comes with the work
- What happens if the job turns out different
- How the surfaces are prepared before sealing
- What the cure time is
Why act early in St Lawrence
A quick bead over the top of the old sealant can look fine at first, but it won’t bond to the old layer. Taking it all out and starting again is the only way to get a lasting seal. In an older home around St Lawrence, damp from a failed joint can get into timber and plaster, and that is a much bigger job than renewing the sealant.
What it costs depends on how much there is to do, how much old material has to come out and how easy the joints are to reach. You’ll have a clear quote before any work starts.
Why us?
- Over 20 years’ experience
- Rated 4.9 stars on Google
- We leave the area clean and tidy
- Anti-fungal sanitary silicone in wet areas
Read what affects the cost or what customers say.
Work for landlords, hotels and businesses
We work for landlords and agents as well as householders. Resealing between tenancies keeps a property looking cared for before the next move-in.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.
New build mastic in St Lawrence: local notes
St Lawrence is within about 1 mile of the coast. Plot mastic on new homes near the coast takes more weather than it would inland, so it’s worth checking at snagging. 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.
In and around St Lawrence, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
St Lawrence is about 1 mile west of Ramsgate, in Kent. Homes, rented property, offices and hotels in St Lawrence can book us for new build mastic, old or new, large or small. The work is guaranteed for a year. Across Kent, we cover 922 places, and St Lawrence is one of them. For nearby work, see our Chelmsford page.
Every address in CT11 and CT12 is within our area for new build mastic. You’ll find streets such as Park Road, Saxon Road and Downs Road, and we cover them all. Being close to the A255, St Lawrence is easy for our applicators to reach for new build mastic. Nearby, we also carry out new build mastic in Ramsgate (1 mile east), Northwood (1 mile north), Upton (2 miles north-east), St Peter's (2 miles north) and Broadstairs (2 miles north-east). Further out, we also cover Canterbury (14 miles west), Margate (3 miles north), Dover (14 miles south), Deal (8 miles south), Herne Bay (12 miles west) and Tower Hamlets (15 miles south).
What’s near St Lawrence
In St Lawrence, that means homes and buildings near Chatham House Grammar School, Churchill House School With Railed Area and The Admiral Fox pub. St Lawrence has its own railway station: Ramsgate station. Well-known places in the area include Westwood Cross (1.5 miles north) and Ramsgate General Hospital (0.6 miles south-east). The countryside around St Lawrence includes Sandwich and Pegwell Bay.
Nearby places to St Lawrence
Other services in St Lawrence
St Lawrence: your questions answered
Can you do new build mastic in St Lawrence?
Yes. Our work covers London and the South East, and St Lawrence is part of that. Just call 0345 464 0079 or send us an email with a few details of the job.
Is St Lawrence within the area you cover?
Yes. St Lawrence is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
What sealant do you use?
The product depends on the job: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. Brands we use include Arbo and Everbuild.
Can I add another job to the visit?
Yes, we can. Several rooms, windows or areas can go on one quote.
Do you remove the old sealant?
Yes. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
Is it worth trying it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Do you use white or clear sealant?
Most bathroom joints are white or clear, but sealant comes in other colours too. We choose one to suit the room and agree it with you.
How long does new build mastic take?
It depends on the size of the job, but most jobs take anything from a few hours to several days, depending on the number of plots. We will tell you when we quote.
DIY sealant or a professional job?
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions.