Isle of Wight · England
External & façade joints in Great Thorness, Isle of Wight
Sealing brickwork movement joints, render, cladding and façade joints in Great Thorness, with a 12-month guarantee on every job. Ask us for a quote.
- Rigid filler in a joint that should flex
- Hard, crazed mastic that has stopped moving
- Brick movement joints where the sealant has split
Should I try it myself first?
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it does not work out, we can still put it right.
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.
How we handle external mastic in Great Thorness
Ground-floor and low-level joints are straightforward to reach. 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. If you’re dealing with panel joints letting water in and weeds or debris growing in open joints, we can put it right, on render & cladding joints, brickwork movement joints and façade panels alike.
In a village or hamlet like Great Thorness, older cottages and farm buildings often stand in the open, where walls and rooflines take the weather head on. Joints on those walls need a sealant that moves with the building and stays in place.
Every job comes with our 12-month guarantee, wherever you are in the Isle of Wight.
- Where
- Great Thorness (PO31)
- Region
- Isle of Wight
- Cover
- 12 months on all our work
- Quote
- A clear price before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Looking after it afterwards
So the new joints stay in good condition:
- Fix overflowing gutters above sealed joints
- Tell anyone working on the walls about the movement joints
- Leave the joints unpainted unless we’ve said otherwise
- Keep high-pressure jets off the joints
Make sure anyone working on the wall later knows where the movement joints are. They should be kept open and resealed, not filled.
A joint that has stopped moving pushes the movement elsewhere, often as cracks near the joint. Catch it early and you reduce the risk.
Also near Great Thorness
Also in Great Thorness
Walls and rooflines in Great Thorness
Great Thorness is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. Both are hard on movement joints and outside wall joints, which can dry out and crack sooner where a building faces the weather. The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Around Great Thorness, as everywhere, external mastic is only as good as the preparation behind it.
Great Thorness is about 3 miles south-west of Cowes, in the Isle of Wight. Homes, rented property, offices and hotels in Great Thorness can book us for external mastic, old or new, large or small. The work is guaranteed for a year. Great Thorness is one of 125 towns and villages in the Isle of Wight we cover for external mastic. We also work in Southampton, around 13 miles away.
Postcode districts we cover here for external mastic: PO31. Other places close to Great Thorness include Porchfield (1 mile south-west), Locksgreen (1 mile south-west), Rew Street (2 miles north-east), Newtown (2 miles south-west) and Northwood (2 miles north-east). Within a short drive, we also cover Newport (3 miles south-east), Ryde (9 miles east), Cowes (3 miles north-east), Sandown (10 miles south-east), Shanklin (10 miles south-east) and Ventnor (11 miles south-east). For island and remote addresses, the job takes a little more planning, so mention it when you ask for a quote.
Local landmarks in Great Thorness
Locally, jobs take us to homes and businesses close to Sportsman's Rest pub, among other places. Nearby you’ll also find Carisbrooke Castle (3.5 miles south-east) and St Mary's Hospital (2.8 miles south-east). Not far away are Mill Hill.
Why act early in Great Thorness
Running new sealant over the old bead rarely lasts. New sealant doesn’t bond well to old, weathered sealant, so the old joint is cut out fully first. Older cottages and farmhouses around Great Thorness can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
Homes and businesses are quoted the same way: the amount of work, the access and the products needed, plus any working-time requirements on site. Call for a quick quote and we’ll go through it with you.
Why Great Thorness customers choose us
- Full insurance on every job
- Quality sealants from Arbo and Everbuild
- Every job guaranteed for a year
- We leave the area clean and tidy
Read our cost guide or our reviews.
How we quote for external mastic
Call for a quick quote. The main things that affect it are:
- Whether the work is at height
- Mould in or behind the old joints
- How many rooms, windows or areas are involved
- Any working-time requirements on site
Instead of a standard rate, we price the job in front of us: the amount of work, the old material and the access. You will know the price before we begin.
Helping us quote
There’s no need for technical detail. It helps if you can tell us:
- Whether it has been sealed before
- Where the property is
- Whether it’s a home or a business
- Access, such as stairs, a lift or height
Want a quote for external mastic? Please phone 0345 464 0079 or email us and tell us about the job. We will explain what we’d do and send you a clear quote before work begins.
Signs you need external mastic in Great Thorness
Buildings move more than people expect. Brickwork grows a little over the years, blockwork and concrete shrink, and all of it moves with heat and moisture. The sealant in the movement joints takes that strain.
Look out for these signs:
- Cracked joints where brick meets render or frames
- Leaking joints around cladding and façade panels
- Weathered mastic that no longer stretches
- Moss and dirt in joints with no sealant left
Historic houses such as Swainston Manor, about 3 miles south, show how far back building around Great Thorness goes.
Questions to ask before booking
- Whether they seal over old material or remove it
- Who turns up on the day
- What happens if the job turns out different
- How the colour is chosen
Questions from Great Thorness
Is external mastic in a coastal place like Great Thorness any different?
Coastal weather is harder on outside sealant: there’s more wind-driven rain and, closer to the shore, salt in the air. Choosing the right sealant for the frame and wall, laid at the right depth, helps it last.
Can you do external mastic in Great Thorness?
Yes, Great Thorness is within the area we cover. We work across London and the South East. Just ring 0345 464 0079 or drop us an email with a few details of the job, and we’ll send you a clear quote.
Do you work for letting agents?
Yes. As well as householders, we work for landlords, agents, businesses and hotels in Great Thorness.
Do you seal joints where cladding meets other materials?
Yes. The old joint is removed, both surfaces cleaned and primed where needed, and a flexible sealant applied. The colour is chosen to suit.
Are you an approved applicator?
Yes. We are approved under the ARBOMaster scheme, which is run for the Arbo sealant brand.
Do the sealants smell?
Possibly a little. Any smell clears as the sealant cures, and ventilation helps.
What is backing rod for?
Backing rod controls the sealant depth and keeps it off the back of the joint. That way it bonds to the two sides only and can stretch.
What’s an expansion joint in brickwork?
A vertical gap in a long brick wall is generally a movement joint. It lets the bricks expand without cracking.
What we do, step by step
Our applicators work methodically: protect, prepare, seal, tidy. For most jobs that takes anything from a few hours to several days, depending on the building and we leave things clean and tidy. Somewhere like Great Thorness needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- Each joint is checked and the colour of the new sealant agreed.
- We take out the old sealant until the faces are sound.
- 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.
Before we arrive
- Keep children and pets away from the work area
- Mention if the joints have been sealed before
- Move anything stored near the joints
Getting a quote
It all starts with a short chat. Describe the problem, the location and the size of the job. When it suits you, ring 0345 464 0079 or send us an email.
Advice
When something else is needed
We’d rather tell you now than do work that won’t last, so here’s what sealant cannot put right:
- Movement that is more than a sealant joint can take
- Walls that need new movement joints cut into them
- Render that’s blown, hollow or coming away
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we will tell you honestly.
Surfaces we seal
- Concrete & block
- Brickwork movement joints
- Copings & trims
- Joints between brick and frames
- Façade panels
- Render & cladding joints