Isle of Wight · England
New-build mastic & snagging in St Lawrence, Isle of Wight
Problem with your new-build sealant joints in St Lawrence? We cut out the old, prepare the joints and apply the right sealant, with a 12-month guarantee.
- Worktop and upstand sealant coming away
- Second-fix sealing on new plots
- Sealant that never bonded to the surface
Common questions in St Lawrence
I let a flat near Shanklin station. Can you help?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before work begins.
Do you cover smaller places like St Lawrence?
Yes. St Lawrence is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Can you do several jobs on one visit?
Yes. Tell us about everything you’d like done and you’ll get one quote.
Do you hold any approvals?
Yes. We’re an ARBOMaster approved applicator, which is run for the Arbo sealant brand.
Do you work through snagging lists?
Yes. Snagging lists are a common starting point for us. We agree the sealant items with you before work begins.
What sealant do you use?
It depends on the joint: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. We use products from Arbo and Everbuild.
Should I go to my builder first?
Start with the builder if you are in the snagging or warranty period. If it is not resolved, we can reseal it properly.
Where are you based?
We are a Crawley-based firm, with over 20 years’ experience. We work across South East England, London and Scotland.
How we handle new build mastic in St Lawrence
Building dust is behind a lot of failed new-build sealant. Each joint is cleaned of dust and primed where the product calls for it, so the sealant actually sticks instead of bonding to the dust. If you have plot mastic for developers ahead of handover and smeared, uneven beads picked up at snagging, we can put it right, whatever the surface.
Somewhere as small as St Lawrence, new homes tend to be conversions, self-builds or a few houses rather than an estate. Each still needs its sealant and floor joints finished properly.
The work is covered for a year after we finish. If anything isn’t right with it, call 0345 464 0079 or email us.
- Place
- St Lawrence (PO38)
- Wider area
- Isle of Wight
- Cover
- A year, on every job
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
DIY versus a professional finish
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
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.
Joints and finishes in St Lawrence homes
St Lawrence is close to the coast. Plot mastic on new homes near the coast takes more weather than it would inland, so any gaps are best picked up early. The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Around St Lawrence, as everywhere, new build mastic is only as good as the preparation behind it.
St Lawrence is about 4 miles south-west of Shanklin, in the Isle of Wight. Anywhere in PO38, we cover new build mastic for homes and businesses. 125 places in the Isle of Wight are on our list, large and small. We also work in Portsmouth, about 17 miles from St Lawrence.
All of PO38 is covered for new build mastic. Whether your property is on Twining Road, Whitwell Road and Woolverton Road or anywhere close by, we can help. Neighbouring places we cover for new build mastic include Steephill (1 mile east), Nettlecombe (1 mile north-west), Whitwell (1 mile north-west), Ventnor (1 mile east) and Bierley (2 miles north-west). Within a short drive, we also cover Newport (8 miles north), Ryde (10 miles north), Cowes (12 miles north), Sandown (6 miles north-east), Shanklin (4 miles north-east) and East Cowes (12 miles north). For island and remote addresses, the job takes a little more planning, so let us know when you get in touch.
Local landmarks in St Lawrence
Typical jobs here are in homes near St Catherine's School. St Lawrence’s nearest station is Shanklin station, about 4.1 miles north-east. A little further out are Arthur Webster Memorial Hospital for Children (4.1 miles north-east) and Longshoremans Museum (1.3 miles east). For a walk, there’s Stenbury Down.
Honest limits
We will always be straight with you, so here’s what sealant cannot fix:
- Movement caused by a poorly fitted tray or bath
- Damaged fittings that need replacing
- Structural cracks in walls or ceilings
If in doubt, ring 0345 464 0079 or email us and we will say what we think.
Surfaces we seal
- Kitchens
- Plot handovers
- Skirting & floors
- Windows & doors
- Show homes
- Bathrooms & en suites
What affects the cost of new build mastic
Some jobs are bigger than they look, and some smaller. What affects the quote:
- Working hours on commercial sites
- How many areas need sealing
- Any mould that needs treating
- Whether the work is at height
Homes and businesses are quoted the same way: the amount of work, the access and the products needed, along with when we can work on site. Ask us for a quote and we’ll explain what it covers.
Helping us quote
To make quoting easier, please include:
- Roughly how big the job is
- If it’s domestic, commercial or a hotel
- A few pictures by email, if you can
- Where the property is
It all starts with a short chat. Describe the problem, the location and the size of the job, and we’ll explain how we’d tackle it. When it suits you, call 0345 464 0079 or send us an email.
Also in St Lawrence
Surface by surface
Skirting and floors
Floors and skirting move as the house dries and the heating runs. Caulk cracks; a flexible sealant moves with it in a colour to suit.
Show homes
Tired or marked sealant in a show home can be renewed. The old bead comes out and a clean new one goes in.
Why act early in St Lawrence
A tube of sealant from the DIY shop won’t fix the cause: grit, unprimed surfaces and old layers underneath. Proper removal and preparation are what make it last. Around St Lawrence, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
We don’t show prices on the website, because each job is priced on what it involves. For a quick quote, please ring 0345 464 0079 or drop us an email and we’ll talk you through it.
Why us?
- Full insurance on every job
- 4.9 on Google from 180+ five-star reviews
- White, clear, grey or another colour, product permitting
- We never seal over old sealant
See our cost guide or customer reviews.
How it works
The work is kept neat and contained to the area we are working on, so you can carry on as normal. The job normally takes anything from a few hours to several days, depending on the number of plots. Somewhere as small as St Lawrence, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We look at why each joint failed, including any movement.
- Old sealant is cut out and the joints cleaned.
- Joints are dried and primed where the product calls for it.
- New sealant goes in, with baths filled first so they’re at their heaviest.
- We check every joint and leave you with the cure times.
Before we arrive
- Plan for the work area to be out of bounds to pets and children
- Mention any leaks or damp you’ve noticed
- Mention any tricky access
How to get a quote
We quote each job on its own, so the first step is telling us about yours. Just phone 0345 464 0079 or drop us an email with the details, and photos are welcome.
Advice
Common problems we fix in St Lawrence
When the heating goes on in the first winter, the house dries fast. Gaps open along skirting, frames and worktops.
Signs it’s time to call us include:
- Second-fix sealing on new plots
- Skirting joints opening in the first winter
- Cracked sealant around new window and door frames
- Gaps behind new kitchen upstands
For new homes near Shanklin station, it’s worth checking the sealant early, while snags are still fresh.
Questions to ask before you book
- How the joint is cleaned and prepared
- When the joint can take water or movement
- The length of the guarantee
- How much experience the applicator has