Isle of Wight · England
External & façade joints in St Lawrence, Isle of Wight
Sealing brickwork movement joints, render, cladding and façade joints for St Lawrence, backed by a one-year guarantee. Ask us for a quote.
- Moss and dirt in joints with no sealant left
- Rigid filler in a joint that should flex
- Water getting into walls through failed joints
Work for landlords, hotels and businesses
Landlords and letting agents in St Lawrence can book us as well as homeowners. 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 matters even more when someone else lives there. Resealing at the right time is simple maintenance.
About our external mastic in St Lawrence
Low-level joints can generally be done from the ground. Where joints are higher up, tell us about the building when you get in touch and we’ll confirm what’s needed to reach them safely. We are often asked to deal with water getting into walls through failed joints and sealant that has lost its bond to the brick or render, across copings & trims, brickwork movement joints and façade panels.
Somewhere as small as St Lawrence, homes and farm buildings often face open ground, so walls and rooflines take the full force of wind and rain. Joints on those walls need a sealant that moves with the building and stays in place.
All our work is covered by our one-year guarantee, wherever you are in the Isle of Wight.
- Location
- St Lawrence (PO38)
- Region
- Isle of Wight
- Cover
- A year, on every job
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Common questions in St Lawrence
Do you cover smaller places like St Lawrence?
Yes, smaller places are covered as well as towns. 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 help a landlord with a rental near Shanklin station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. Just ring 0345 464 0079 or send us an email with the address and what needs doing, and we’ll give you a clear price.
How long does external mastic take?
Most jobs take anything from a few hours to several days, depending on the building. We’ll confirm how long when we quote.
Where is Mr Mastic based?
Our base is Crawley, with over 20 years’ experience. We work across South East England, London and Scotland.
How do I get a quote for external mastic in St Lawrence?
The cost depends on the size of the job, access and how much old sealant has to come out. Ask us for a quote.
Can you match the colour of my brickwork?
The aim is a neat, even joint in a colour that suits the wall. We will talk through colour options before any work starts, matched as closely as the range allows.
Do the sealants smell?
Sometimes, a little. Any smell clears as the sealant cures.
Is it OK to seal over old sealant?
No. New silicone will not bond to old silicone, and it traps any mould or water underneath. It all has to come out first.
Looking after it afterwards
Good habits help new joints last longer. A few tips:
- Look over the joints every year, ideally after winter
- Keep movement joints as flexible joints, not mortar
- Leave the joints unpainted unless we have said otherwise
- Clear growth from the base of walls and joints
Keep the joints clear of soil, plants and climbing growth. Damp material against the sealant shortens its life.
An open movement joint lets rain into the wall every time it pours. Over time it can mean damp inside, stained render or frost-damaged brick, all bigger jobs than a reseal.
Why act early in St Lawrence
Resealing a run of joints in one go is generally better than patching one at a time. Joints of the same age tend to fail together and it means sorting access once. Where a wall is exposed, as many are in small places like St Lawrence, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
Why choose Mr Mastic in St Lawrence
- Domestic, commercial and hotel work
- Over 20 years’ experience
- You choose the colour before work begins
- White, clear, grey or another colour, product permitting
Read our cost guide or what customers say.
Should I try it myself first?
A DIY attempt does not rule out a professional job. We remove it and do the joint properly, so just mention it when you contact us.
If you’re set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
External mastic in St Lawrence: local notes
St Lawrence is within about 1 mile of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That’s hard on movement joints and outside wall joints, especially on the side facing the sea. With historic houses such as Rylstone Manor (about 3.8 miles north-east) nearby, there’s older building stock in the area around St Lawrence as well as newer homes. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth.
Letting a property close to Shanklin station? Then split movement joints are easy to miss on a rental until damp shows inside. Schools such as St Francis Catholic and Church of England Primary Academy are buildings too, and its movement joints, gutters and trims need looking after like any other building’s.
St Lawrence is about 4 miles south-west of Shanklin, in the Isle of Wight. From the centre of St Lawrence to the outskirts, we cover external mastic for every kind of property. St Lawrence is one of 125 towns and villages in the Isle of Wight where we work. We also work in Portsmouth, around 17 miles away.
Every address in PO38 is covered for external mastic. We cover properties on Twining Road, Whitwell Road and Woolverton Road and the roads around them. Other places close to St Lawrence 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). We also work in nearby towns such as 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 addresses take a little more planning, so tell us where you are when you ask for a quote.
Landmarks near St Lawrence
Around St Lawrence, our work takes us to homes and buildings near St Catherine's School and the streets around them. For rail, the closest station is Shanklin station, about 4.1 miles north-east of the centre. Nearby you’ll also find Arthur Webster Memorial Hospital for Children (4.1 miles north-east) and Longshoremans Museum (1.3 miles east). The countryside around St Lawrence includes Stenbury Down.
Also in St Lawrence
What happens on the day
We work through the job in order: protect, prepare, seal, tidy. For most jobs that takes a few hours for a handful of joints, longer for a whole elevation and we leave things clean and tidy. For a village or hamlet like St Lawrence, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- Each joint is checked and the colour of the new sealant agreed.
- Failed sealant is removed back to clean, sound faces.
- Backing rod goes in so the sealant can stretch between the two faces.
- We prime the faces where required.
- We gun in low-modulus sealant and tool it neatly.
Preparing for the visit
- Let us know about stairs, lifts or work at height
- Mention if the joints have been sealed before
- Mention any leaks or damp you’ve noticed
How to get a quote
To get a quote, phone 0345 464 0079 or email us and tell us where the job is and what the problem looks like. You will have a clear quote before work begins.
Advice
What affects the quote in St Lawrence
There’s no set price list, because no two jobs are the same. The quote depends on:
- Whether there’s mould to deal with
- The number and length of the joints
- When we can work, for business premises
- How many areas need sealing
Combining jobs into one visit usually makes better use of the time than several visits. We’ll send you a clear quote for the lot.
Helping us quote
When you contact us, it’s useful to know:
- Access, such as stairs, a lift or height
- What the problem is, such as mould, gaps, leaks or cracking
- A few photos by email, if you can
- Roughly how big the job is
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and add pictures by email if you can.
Signs you need external mastic in St Lawrence
Using the wrong sealant is another common reason. A stiff, general-purpose sealant can’t cope with a joint that moves a lot, and it tears off the sides.
These are the problems we’re asked about most:
- Brick movement joints where the sealant has split
- Old sealant gone brittle and cracked
- Cracked joints where brick meets render or frames
- Panel joints letting water in
In the older streets around St Lawrence's Church, older walls, gutters and the joints where extensions meet them need a flexible sealant.
What your quote should include
- How the surfaces are prepared before sealing
- What happens if the job turns out different
- Whether they’re fully insured
- Which colour the sealant will be