Isle of Wight · England
Parkhurst External Mastic
Sealing brickwork movement joints, render, cladding and façade joints in Parkhurst, with a one-year guarantee on every job. Ask us for a quote.
- Old sealant gone brittle and cracked
- Rain getting behind render or cladding at a joint
- Cracked joints where brick meets render or frames
When something else is needed
To be straight with you, some problems need a different trade:
- Cutting new joints into brickwork, which is building work rather than sealant work
- Movement that’s more than a sealant joint can take
- Cracked brickwork or render that needs a builder or plasterer
If you’re not sure, just phone 0345 464 0079 or send us an email and we will give you a straight answer before booking.
What we seal
- Concrete & block
- Joints between brick and frames
- Façade panels
- Render & cladding joints
- Copings & trims
- Brickwork movement joints
How we handle external mastic in Parkhurst
Joints in render and cladding are easy to overlook until a damp patch appears. We inspect them, agree which need doing and reseal with a weatherproof, flexible sealant in a colour to suit. If you are dealing with weathered mastic that no longer stretches and water getting into walls through failed joints, we can put it right, on render & cladding joints, joints between brick and frames and brickwork movement joints alike.
Around Parkhurst, older buildings can be stone, brick or timber-framed, many with extensions added later. Where one material meets another is where water usually gets in.
You are covered for a year from the day we finish. If there’s a problem with it, please ring 0345 464 0079 or email us.
- Place
- Parkhurst (PO30)
- Region
- Isle of Wight
- Guarantee
- A year, on every job
- Quotes
- A clear price before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
What we are called out for in Parkhurst
Weeds, moss and debris in a joint are a sign the sealant has gone. Dirt and roots then trap moisture in the joint and make things worse.
It’s worth asking for a quote if you see:
- Plants rooting in failed movement joints
- Joints pointed up with cement by mistake
- Failed seals between different materials
- Brick movement joints where the sealant has split
Historic houses such as Carisbrooke Castle, about 2.1 miles south, show how far back building around Parkhurst goes.
What your quote should include
- Is the old sealant removed completely?
- What happens if they find a problem under the old sealant
- How long to leave it before use
- Is VAT in the price?
What the job involves on each surface
Copings and trims
Metal and stone copings both move with temperature, so a flexible sealant suits them best year round.
Joints between dissimilar materials
Joints where frames, sills or panels meet the wall are common leak points. We cut out the old sealant and reseal with a product suited to both surfaces.
Parkhurst: your questions answered
Is Parkhurst in your area for external mastic?
Yes, Parkhurst is within the area we cover. We work across London and the South East. You can phone 0345 464 0079 or email us and let us know what needs doing.
Is there a guarantee on external mastic in Parkhurst?
Every job comes with our one-year guarantee, wherever it is. We’re fully insured, and an ARBOMaster approved applicator.
How long before the joint can be used?
Cure times vary by product and the conditions. We tell you how long to leave it before we go.
Do you work for hotels and businesses?
Yes. Hotels, offices and other businesses use us.
Can new sealant go over the old?
No. New silicone will not bond to old silicone, and anything trapped underneath, including mould and water, stays there. We remove it all first.
Can you do several jobs on one visit?
Yes. Tell us about everything you’d like done and you’ll get one quote.
Do you take out the old sealant first?
Yes. All of the old material is cut out and the joint cleaned before applying anything new.
Can you seal joints between render and window frames?
Yes. The old joint is removed, both surfaces cleaned and primed where needed, and a flexible sealant applied. We pick a colour that works with both materials.
Outside joints around Parkhurst
Historic houses like Carisbrooke Castle (about 2.1 miles south) are a reminder that the area around Parkhurst has older buildings as well as new. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material. 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.
If you look after a building such as Hunnyhill Primary School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Parkhurst is about 1 mile north of Newport, in the Isle of Wight. Across the PO30 area, we can carry out external mastic at your property. Parkhurst is one of 125 places in the Isle of Wight we cover for external mastic. Our Portsmouth page covers work nearby.
Here we cover the PO30 postcode area for external mastic. Local streets include Dodnor Lane, Argyle Road and Sherwood Road. We also cover the places around Parkhurst: Noke Common (1 mile north-west), Hunny Hill (1 mile south), Forest Side (1 mile south-west), Northwood (2 miles north) and Rew Street (2 miles north-west). Within a short drive, we also cover Ryde (6 miles east), Cowes (3 miles north), Sandown (8 miles south-east), Shanklin (8 miles south-east), Ventnor (9 miles south-east) and East Cowes (3 miles north). Island and remote addresses take a little more planning, so please mention your location when you ring 0345 464 0079 or email us.
Around Parkhurst
Locally, jobs take us to homes and businesses close to Medina College, Island Innovation VI Form Campus and The Stag pub, among other places. Well-known places in the area include Isle of Wight Bus & Coach Museum (1 mile south-east) and Carisbrooke Castle (2.1 miles south). For a walk, there’s Mill Hill and Briddlesford Nature Reserve.
Also near Parkhurst
Also in Parkhurst
Keeping the joints in good condition
How long the joints last depends on use and care. We suggest:
- Do not let climbing plants root in the sealant
- Deal with leaking gutters that soak the joints below
- Keep high-pressure jets off the joints
- Show decorators and builders where the movement joints are
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.
Gaps, plants or missing sealant in a joint are worth getting looked at. Early work is quicker and leaves a better finish.
Work for landlords, hotels and businesses
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
Letting agents and landlords in Parkhurst can book us as well as homeowners. Resealing between tenancies keeps a property looking cared for.
Should I try it myself first?
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 does not work out, we can still put it right.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
The process
We bring everything the job needs with us, so you don’t need to buy or prepare anything. After a quick look at the joints together, the area is protected and the work begins. It normally takes anything from a few hours to several days, depending on the building. Somewhere as small as Parkhurst, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We start by checking each joint, agreeing the ones to redo and how we will reach them.
- Old sealant and any debris are cut and raked out.
- Both sides are cleaned back to sound material and primed if needed.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
Getting ready for the visit
- Let us know about parking restrictions
- Mention any tricky access
- On commercial sites, let us know about site rules
Ask for a quote
For external mastic in Parkhurst, call 0345 464 0079 or send us an email. Tell us what the problem is and where, and you will get a clear quote before work begins.