Isle of Wight · England
External Mastic in Gunville
Sealing brickwork movement joints, render, cladding and façade joints for Gunville, backed by a 12-month guarantee. Ask us for a quote.
- Failed seals between different materials
- Rain getting behind render or cladding at a joint
- Panel joints letting water in
What we can’t put right
Before booking, it’s worth knowing the limits too:
- Movement that’s more than a sealant joint can take
- Loose or hollow render, which needs re-rendering
- Cracking across the wall rather than at a joint
Not sure which it is? You can call 0345 464 0079 or send us an email and we will tell you honestly before booking.
Surfaces we seal
- Brickwork movement joints
- Copings & trims
- Joints between brick and frames
- Render & cladding joints
- Concrete & block
- Façade panels
External mastic in Gunville
External mastic is a job where short cuts show quickly. Overfilled joints, missing backing rod and sealant laid over old sealant rarely last long. We take the old material out and do it properly. If you’re dealing with failed sealant between panels on a façade and failed seals between different materials, we can help, whatever the surface.
Older homes in small places like Gunville may be stone, brick or timber-framed, often with later extensions. The joints where those materials meet are the weak points, and they need the right sealant at the right depth.
A one-year guarantee comes with the work, just as it does everywhere we cover.
- Place
- Gunville (PO30)
- Region
- Isle of Wight
- Cover
- 12 months on all our work
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Landlord and commercial work in Gunville
We also work for property managers and facilities teams in Gunville and across the Isle of Wight. We can quote a run of properties together, and we’re fully insured.
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. We can quote for more than one property at once.
How we quote for external mastic
Every job gets its own quote. This is what makes a difference:
- When we can work, for business premises
- How easy the joints are to reach
- How many rooms, windows or areas are involved
- How much there is to do
Homes and businesses are quoted the same way: the amount of work, how we reach it and what it needs. Ask us for a quote and we will go through it with you.
Asking for a quote
What to tell us when you ask for a quote:
- How many joints, rooms or windows are involved
- Photos by email, if that is easy
- Whether it has been sealed before
- Where the job is, and your postcode
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and add photos by email if you can.
Why deal with it now?
A properly done movement joint is an even line in a colour that suits the wall. A hurried job with smeared edges and no backing looks worse and fails sooner, so it pays to do it properly once. Around Gunville, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
The cost reflects the work involved, not guesswork. That’s why we ask a few questions first and agree the price before starting.
Why us?
- Sealant colour chosen to suit
- 12-month guarantee on every job
- Sanitary silicone with an anti-fungal additive in wet areas
- We are fully insured
See how sealant jobs are priced and our reviews.
The process
Every visit runs the same way: we look at the joints together, mask and protect the surrounding surfaces, do the work and clear up. It usually takes anything from a few hours to several days, depending on the building. In a small place like Gunville, access is usually the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We start by walking round the building and agreeing the joints and the access.
- We cut out the old mastic and rake out anything in the joint.
- The faces are brushed clean and primed where the product requires it.
- Backing rod sized to the joint goes in to set the depth.
- The exterior sealant is applied, tooled and checked along its length.
Before we arrive
- Clear the area around the work
- Try not to wet indoor joints just before the visit
- On commercial sites, let us know about site rules
Getting a quote
To get a quote, ring 0345 464 0079 or drop us an email with the location and a short description of the problem. We’ll give you a clear price before any work starts.
Advice
Nearby places to Gunville
Other services in Gunville
Outside joints around Gunville
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. Historic houses like Carisbrooke Castle (about 0.8 miles south-east) are a reminder that the area around Gunville has older buildings as well as new. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth.
Schools such as Carisbrooke College are buildings too, and larger buildings have long runs of movement joint that eventually need resealing.
Gunville is about 1 mile west of Newport, in the Isle of Wight. For external mastic in and around Gunville, it’s easy to get a quote: please call 0345 464 0079 or drop us an email. We cover the Isle of Wight from our Crawley base, Gunville included. Gunville is one of 125 places in the Isle of Wight where we work. Portsmouth is on our list too, around 13 miles away.
All of PO30 is covered for external mastic. Whether your property is on Ash Lane, Purdy Road and Gunville Road or a nearby road, we can help. We also cover Carisbrooke (1 mile south), Clatterford (1 mile south), Plaish (1 mile south), Bowcombe (1 mile south-west) and Gatcombe (2 miles south). We also work in nearby towns such as Ryde (7 miles east), Cowes (4 miles north), Sandown (8 miles south-east), Shanklin (8 miles south-east), Ventnor (9 miles south-east) and East Cowes (4 miles north-east). Island and remote addresses take a little more planning, so please mention your location when you ring 0345 464 0079 or drop us an email.
What’s near Gunville
Locally, jobs take us to homes and businesses close to Seaclose Park, Carisbrooke Church of England Controlled Primary School and The Waverley pub and the streets around them. Well-known places in the area include St Mary's Hospital (1.2 miles north-east) and Carisbrooke Castle (0.8 miles south-east). For a walk, there’s Briddlesford Nature Reserve and Mill Hill.
Do you need external mastic in Gunville?
Every building moves. Clay bricks expand slightly over their life, concrete and block shrink, and everything moves with temperature and wet. The sealant in the movement joints takes that strain.
Signs it’s time to call us include:
- Water getting into walls through failed joints
- Sealant pulling away from one side of the joint
- Weeds or debris growing in open joints
- Cracked joints where brick meets render or frames
In the older streets around St. Mary's Church, older walls, gutters and the joints where extensions meet them need a flexible sealant.
What to look for in a quote
- The length of the guarantee
- How long to leave it before use
- What happens if the job turns out different
- Which colour the sealant will be
Keeping the joints in good condition
No joint lasts for ever, but care makes a real difference. A few tips:
- Ask before painting over external sealant
- Act on the first splits you see
- Tell anyone working on the walls about the movement joints
- Wash walls gently around the sealant
Make sure anyone working on the wall later knows where the movement joints are. They must stay as flexible joints, never rendered or pointed over.
Leave a failed movement joint and water keeps getting into the wall. That can lead to damp patches, staining and frost damage, all bigger jobs than a reseal.
Gunville: your questions answered
Do you cover smaller places like Gunville?
Yes. Gunville is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Is external mastic in Gunville guaranteed?
All our work, in Gunville and everywhere else, comes with a 12-month guarantee. We are also fully insured and ARBOMaster approved.
Do you seal joints where cladding meets other materials?
Yes. Different materials move at different rates, so a flexible sealant is needed where they meet. The sealant is matched to both sides.
Can you seal over the old sealant?
No, and we never do. It can look neat for a few weeks, but the new layer lifts away from the old one. The old sealant has to come out completely.
How long does the job take?
Typically it takes a few hours to a few days, depending on the length of joint and the access. Bigger jobs take longer.
Do I need to be at home?
If the work is inside, we need someone to let us in. Once we’ve agreed the job, you do not need to watch us work.
What do you need from me for a quote?
Only a few details: where it is, what you’ve noticed and how we reach it. After that, simply ring 0345 464 0079 or drop us an email.
I’m a tenant. Can you help?
Yes, but check with your landlord or agent first. Many landlords are glad to have it sorted.