Construction and new-build mastic in St Lawrence, Isle of Wight
Construction mastic for St Lawrence, from a contractor working since 2005. Fully insured, with a 12-month guarantee.
- Mastic snags holding up handover
- Existing joints on a refurb that need cutting out and resealing
- Early adhesion failures on new external joints
Construction mastic in St Lawrence
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
Construction mastic for commercial buildings in St Lawrence
Since 2005 we’ve worked alongside main contractors, developers and fit-out firms. Quantities come off the drawings, the sequence is agreed with the site manager and the work follows the trades. To price a package in St Lawrence, send drawings and the specification through our quote form. We work on cladding and panel joints, floor and skirting junctions and window and door perimeters, and the failures we are asked to look at most are perimeter gaps outside the sealant’s range and window and door perimeters that won’t pass inspection. Sealant applicators who only do sealant are a different proposition from a general trade with a gun in the van: in St Lawrence, that means joint design, primers and backing rod as standard.
Construction in and around smaller places such as St Lawrence is often barn conversions, small groups of houses or extensions to halls and schools. Perimeters, facade joints and internal sealant all need doing properly, however small the scheme.
Work we carry out comes with a 12-month guarantee. Should something we installed fail, call the office on 01277 525 020 or send photos by email and we’ll come back to it.
- Place
- St Lawrence (PO38)
- Wider area
- Isle of Wight
- Guarantee
- 12 months on our workmanship
- Price
- A fixed quote before we start
- Phone
- 01277 525 020
- Updated
- 3 November 2026
Maintenance after handover
Every sealant joint needs some looking after, and how long they last depends on how they’re treated. Our advice:
- Check frame gaps are within the sealant’s range before sealing
- Keep finished joints away from paint, plaster and scrapers
- Brief the final clean team to avoid blades near sealant
- Get the mastic subcontractor involved early in the programme
If a joint is damaged after sealing, flag it early. Snags can be picked up in a planned close-out visit as agreed in the quote.
External joints sealed in poor weather are a common cause of early failure. Waiting for a dry joint and the right temperature is better than redoing work.
What else we do in St Lawrence
On site: what to expect
Diagnose, treat, sign off: every visit follows that pattern. We inspect the joints and confirm what’s in scope, then the work is carried out to the specified product and detail, and we finish with a walk round so the work can be signed off. Smaller jobs around St Lawrence can be grouped with others nearby. A fixed quote is given before anything starts.
- We start with the drawings, specification and programme.
- Quantities are measured and a fixed price returned.
- We agree with the site team which areas come first.
- Each area is sealed when it’s released.
- Joints are prepared, backed and sealed to the specification.
- Snags are cleared and the package signed off with our 12-month guarantee.
Before we start on site
- Explain the parking and delivery arrangements
- Confirm the product named in the specification
- Point out any areas we must not close
Get a fixed quote
We quote a fixed sum against the scope you give us, so you know the figure before anyone is on site. To start the process, phone 01277 525 020 or send photos by email.
Read more
When something else is needed
A proper diagnosis includes knowing what sealant can’t do. You’ll hear from us if the cause turns out to be any of the following:
- Approving fire stopping as compliant
- Damage to finishes by other trades after we’ve sealed
- Joint design decisions that belong to the architect or engineer
If in doubt, call 01277 525 020 or email a schedule or drawings and we will say what we think before you book.
Joints and surfaces we work on
- Internal decorators’ caulk
- Window and door perimeters
- Floor and skirting junctions
- Cladding and panel joints
- Sanitary and kitchen joints
- Brick and block movement joints
Your questions answered
Does the sea air around St Lawrence change the choice of sealant?
It can, yes: buildings near the sea take more wind-driven rain, and salt in the air nearer the shore. That puts more weight on product choice, primers where the manufacturer specifies them, and correct joint sizing.
Will you take on work at estates like Ventnor Industrial Estate, close to St Lawrence?
Yes, sites like Ventnor Industrial Estate are within our area, along with the rest of St Lawrence. To start, just give us a call on 01277 525 020 or email us with the unit, the joints involved and your access times.
Which sealant will you use?
If the job is specified, we follow the specification. Otherwise, we recommend a product to suit the joint’s movement, the substrate and the conditions, following the manufacturer’s guidance.
Can you follow the specification on our project?
Yes. Include it with the drawings when you ask for a quote, and the quote will be based on it.
What about RAMS and site documents?
Let us know which documents the site needs, such as RAMS, an insurance certificate or CSCS details, and we will confirm them with the quote.
How many days will you need on site?
The duration is planned around your programme and the access we are given. You will have an expected duration with the quote.
Can you come in just for snagging?
Yes, we can. Share the list and photographs, and a fixed quote follows.
Common problems we fix in St Lawrence
Most mastic snags on new buildings come from sequencing rather than product. Sealing before decorators, flooring or other trades have finished leaves joints exposed to damage, and the joint has to be redone.
If one of these sounds familiar, it’s time for a closer look:
- Frame gaps too wide for sealant alone
- Inconsistent sealant finishes from plot to plot
- Sanitary sealant damaged by following trades
- New external sealant already peeling away
For a contractor at a hotel such as St. Rhadagunds Hotel, less than half a mile south-west of St Lawrence, the mastic often has to be finished before a reopening date.
What your quote should include
- What the guarantee covers, and for how long
- Is the sealant right for the movement and the substrate?
- What level of public liability insurance do they hold?
- Whether old or failed sealant will be cut out, not overlaid
Should maintenance staff do it?
Putting right a botched joint often costs more than sealing it well at the start, because the whole bead must be removed and the faces cleaned back again. That’s why many clients bring in a specialist from the beginning.
A short, simple internal joint is often within reach of a maintenance team. Where it goes wrong is preparation: new sealant over old, damp or dusty faces, or the wrong product for the movement.
Construction mastic around St Lawrence: what changes locally
St Lawrence is within about 1 mile of the coast. Facades and window perimeters on coastal schemes take more wind-driven rain, and salt air nearer the shore, which puts weight on correct joint sizing, priming and a sealant suited to the exposure. St Lawrence is in the South East, one of the UK’s drier regions. Still, external mastic needs dry faces within the maker’s temperature limits, which isn’t every day, so external mastic is timed for workable conditions and agreed with the site manager.
Projects at colleges like St Catherine's College (to the east of St Lawrence) tend to run to term dates, so the mastic is planned tightly. When units on a site such as Ventnor Industrial Estate (to the north-east of St Lawrence) are refurbished or reclad, the panel joints and window perimeters are part of the mastic package.
St Lawrence is about 4 miles south-west of Shanklin, in the Isle of Wight. We cover St Lawrence, with the same fixed quotes and 12-month guarantee as everywhere else. St Lawrence is one of 125 places we cover in the Isle of Wight for mastic packages. Portsmouth is covered too, around 17 miles from St Lawrence.
Work on mastic packages is covered throughout PO38, whatever the building. Streets here include Twining Road, Whitwell Road and Woolverton Road, and sites on any of them can send details for a fixed quote. Nearby places we also cover 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). Nearby towns on our patch include 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). Island and remote sites need extra planning, with travel, ferry crossings where needed and weather to allow for, so mention the location when you give us a call on 01277 525 020 or send photos by email.
What’s near St Lawrence
In St Lawrence, that means premises near St Catherine's School. The nearest railway station is Shanklin station, about 4.1 miles north-east. Well-known places in the area include Arthur Webster Memorial Hospital for Children (4.1 miles north-east) and Longshoremans Museum (1.3 miles east). Open spaces near St Lawrence include Stenbury Down.
Cost factors for mastic packages
A fixed quote reflects the actual work. It allows for:
- Whether the work must be split into stages
- Travel to remote or island sites
- Site requirements such as inductions and permits
- Specialist products, such as fire-rated or hygienic sealants
The price depends on the quantity of joints, what has to come out first and the access. Call for a fixed quote once you have the details.
Details that help us quote
For an accurate fixed quote, we need a clear picture of the site. Useful things to include:
- Clear photographs of the problem areas
- The postcode of the building
- What the building is and how it’s used
- Asbestos survey details if the building is older
A good quote starts with a clear picture: what’s there, how much of it, how we reach it and what’s specified. Share whatever details you have and we’ll fill any gaps with a visit.