Isle of Wight · England
Locksgreen External Mastic
We cover Locksgreen for sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly and every job guaranteed for a year.
- Water getting into walls through failed joints
- Brick movement joints where the sealant has split
- Joints pointed up with cement by mistake
DIY sealant or a professional job?
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
External mastic in Locksgreen, done properly
A movement joint is a deliberate break that lets a wall expand and contract. The sealant in it has to stretch and squeeze for years, and when it fails, the wall takes the strain and water finds a way in. We are often asked to deal with hard, crazed mastic that has stopped moving and sealant pulling away from one side of the joint, across render & cladding joints, brickwork movement joints and concrete & block.
In a village or hamlet like Locksgreen, older cottages and farm buildings often stand in the open, 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.
Each job carries a 12-month guarantee, whatever its size.
- Where
- Locksgreen (PO30)
- Wider area
- Isle of Wight
- Guarantee
- One year on every job
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Locksgreen: your questions answered
Is Locksgreen within the area you cover?
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.
Does living near the coast affect external mastic in Locksgreen?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. Choosing the right sealant for the frame and wall, laid at the right depth, helps it last.
Is there any odour?
It depends on the product. Some smell for a while, some hardly at all.
Do you work at height?
It depends on the building. Send us pictures and a rough idea of the height.
How long before the joint can be used?
Different products cure at different speeds, so follow the cure time we give you.
Do you guarantee your work?
Yes. All our work carries a 12-month guarantee.
Do you have insurance?
Yes. We are fully insured, and we can confirm the details when we quote.
How long does external mastic take?
A typical job takes anything from a few hours to several days, depending on the building, including preparation and clearing up. We’ll confirm how long when we quote.
Leave it or put it right?
Low-modulus sealants stretch easily, so they put less strain on the joint edges. That matters on brick, render and concrete, which can be weaker at the face. A stiffer product can damage the joint edge as it fails. In a small place like Locksgreen, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
Instead of a standard rate, we price the job in front of us: how many joints, what’s in them now and how we reach them. You’ll know the price before we begin.
What you get with us
- Approved under the ARBOMaster scheme
- We agree the colour with you first
- Tidy, careful work
- Full insurance on every job
Read what affects the cost and our reviews.
Landlord and commercial work in Locksgreen
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
Failed sealant is one of the commonest items on a check-out report. We can quote for more than one property at once.
Looking after it afterwards
Aftercare is simple:
- Get split or bare joints resealed while the damage is small
- Wash walls gently around the sealant
- Show decorators and builders where the movement joints are
- Look over the joints every year, ideally after winter
Do not let soil, plants or ivy build up against the new joints. Anything that holds water against the joint wears it out sooner.
Leaks behind façade panels and render often go unseen. When it finally shows inside, the joint may have been open for years so early resealing is worth it.
What we do, step by step
When we get to you, we compare the joints with what we discussed. If anything is different, we explain it before carrying on. Most jobs then take a few hours to a few days, depending on the length of joint and the access. Somewhere like Locksgreen needs a little journey planning: 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.
- We start by walking round the building and agreeing the joints and the access.
- Every bit of old sealant and any mortar or debris is cut out.
- Joint faces are cleaned back and primed if the sealant needs it.
- We fit closed-cell backing rod to control the depth.
- The exterior sealant is applied, tooled and checked along its length.
Preparing for the visit
- Plan for the work area to be out of bounds to pets and children
- Move anything stored near the joints
- For business premises, tell us about site rules or sign-in
Get a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we’ll talk you through the work.
Related advice
Locksgreen buildings and the weather
Locksgreen is within about 2 miles of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That is hard on movement joints and outside wall joints, especially on the side facing the sea. 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.
In and around Locksgreen, as anywhere, good external mastic starts with a clean, dry, properly prepared joint.
Locksgreen is about 3 miles west of Newport, in the Isle of Wight. Locksgreen gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Locksgreen is one of 125 places in the Isle of Wight we cover. Southampton is on our list too, about 14 miles from Locksgreen.
Our applicators cover all of the PO30 postcode area for external mastic. Close by, we work in Porchfield (1 mile north-east), Newtown (1 mile west), Great Thorness (1 mile north-east), Forest Side (2 miles east) and Noke Common (3 miles east). Within a short drive, we also cover Newport (3 miles east), Ryde (9 miles east), Cowes (4 miles north-east), Sandown (10 miles south-east), Shanklin (10 miles south-east) and Ventnor (11 miles south-east). For island and remote addresses, a little more planning is needed.
Around Locksgreen
Around Locksgreen, our work takes us to homes and buildings near Sportsman's Rest pub, among other places. Well-known places in the area include Calbourne Water Mill And Rural Museum (3 miles south-west) and Carisbrooke Castle (3.1 miles south-east). The countryside around Locksgreen includes Brighstone Down.
Nearby places to Locksgreen
Also in Locksgreen
Different surfaces, different methods
Concrete and blockwork
The face of concrete or block is often dusty, so cleaning and priming matter. A primer goes on where the product requires one before sealing.
Copings and trims
Joints in copings, parapets and trims are exposed to the worst of the weather. Each is resealed with a weatherproof, flexible sealant.
What we’re called out for in Locksgreen
Poor preparation causes many early failures: dusty or wet faces, no primer where one was needed, or old sealant left in. The sealant never bonds properly.
Look out for these signs:
- Movement joints filled with mortar instead of sealant
- Damp patches traced to an open external joint
- Weathered mastic that no longer stretches
- Joints where the bead has come unstuck
Historic houses such as Swainston Manor, about 1.7 miles south, show how far back building around Locksgreen goes.
What your quote should include
- What the quote includes, VAT included or not
- Who turns up on the day
- Whether you can choose the colour
- How hidden problems are handled