Hampshire · England
Elson External Mastic
Our applicators work in Elson on sealing brickwork movement joints, render, cladding and façade joints. Old material cut out, joints cleaned and sealed neatly and a one-year guarantee.
- Damp patches traced to an open external joint
- Joints pointed up with cement by mistake
- Joints where the bead has come unstuck
External mastic in Elson, done properly
As ARBOMaster approved applicators, we choose exterior sealants to suit the joint and the surfaces. Porous or awkward surfaces are primed where the sealant needs it. We work on copings & trims, render & cladding joints and concrete & block, and people most often call us about rigid filler in a joint that should flex and cracked joints where brick meets render or frames.
Houses in smaller places like Elson can stand more in the open than those in a built-up town, so exposed walls and rooflines take more wind-driven rain. Joints on those sides are normally the first to go.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Location
- Elson (PO12, PO13)
- Wider area
- Hampshire
- Guarantee
- One year on every job
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Landlords, agents and businesses in Elson
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance.
Whether it’s one flat or a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
FAQs for Elson
Do you cover smaller places like Elson?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Can you help a landlord with a rental near Portsmouth Harbour station?
Yes, rental work is part of what we do. Just call 0345 464 0079 or send us an email and tell us about the property, and we’ll give you a clear price.
What information do you need?
Where the job is, what the problem is and roughly how big it is. If you can, email a few pictures.
What sealant do you use?
It depends on the joint: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. Brands we use include Arbo and Everbuild.
Is it messy?
No. We protect the surfaces around the joints, and we tidy up before we go.
Can you work on commercial sites?
Yes. Hotels, offices and other businesses use us, and we are fully insured.
How long before the joint can be used?
Cure times vary by product. Before we leave, we will tell you the cure time.
What is backing rod for?
The foam is closed-cell backing rod. It keeps the sealant at the right depth and bonded to the sides only.
Surface by surface
Cladding and façade panels
Where a cladding system has its own specified sealant, we follow it, or one the system allows. Tell us what the building has when you get in touch.
Copings and trims
Copings expand and contract through the day, so a flexible sealant suits them best in all weathers.
Elson buildings and the weather
Elson is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. Both are hard on movement joints and outside wall joints, which can dry out and crack sooner where a building faces the weather. London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Managing a site like Elson Infant School? Then movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. In the older streets around Church of St Thomas, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Elson is about 1 mile north of Gosport, in Hampshire. Whether you’re in the middle of Elson or further out, we cover external mastic for every kind of property, from flats and houses to offices and hotels. Elson is one of 683 places in Hampshire where we work.
All of PO12 and PO13 is within our area for external mastic. Local streets include Ham Lane, Quay Lane and Avery Lane, all of which we cover. Being close to the A32, Elson is easy for our applicators to reach for external mastic. Nearby, we also carry out external mastic in Gosport (1 mile south), Forton (1 mile south), Bridgemary (1 mile north-west), Priddy's Hard (1 mile south-east) and Rowner (1 mile north-west). Within a short drive, we also cover Havant (8 miles north-east), Eastleigh (14 miles north-west), Fareham (3 miles north-west), Horndean (9 miles north-east), Hedge End (10 miles north-west) and Waterlooville (7 miles north-east).
Local landmarks in Elson
In Elson, that means homes and buildings near The Kings Head pub, St Vincent College and Brune Park Community School, among other places. The closest station to Elson is Portsmouth Harbour station, roughly 2.1 miles south-east of the centre. Nearby you will also find Search (1.6 miles south-east) and Portchester Castle (2.2 miles north-east). Not far away are West of the River Alver and Portsdown Hill.
Do you need external mastic in Elson?
Weeds, moss and debris in a joint are a sign the sealant has gone. Roots and dirt hold water against the wall and make things worse.
If you can see any of these, it’s time to have the joints looked at:
- Gaps where render, brick and frames meet
- Hard, crazed mastic that has stopped moving
- Movement joints filled with mortar instead of sealant
- Movement joints with cracked, split or missing sealant
For landlords with property near Portsmouth Harbour station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
What your quote should include
- Whether they seal over old material or remove it
- The length of the guarantee
- What the quote includes, VAT included or not
- How the colour is chosen
Honest limits
New sealant can’t fix everything, and we’ll tell you before we start. It won’t solve:
- Walls that need new movement joints cut into them
- Cracked brickwork or render that needs a builder or plasterer
- Render that’s blown, hollow or coming away
If you’re not sure, just call 0345 464 0079 or email us and we will give you a straight answer.
Joints and surfaces we work on
- Concrete & block
- Copings & trims
- Brickwork movement joints
- Joints between brick and frames
- Façade panels
- Render & cladding joints
What happens on the day
Before we leave, we go over the finished joints with you and explain the cure time. The work normally takes a few hours for a handful of joints, longer for a whole elevation, depending on how much there is to do. A visit to Elson is planned like any other: the time, the access and where to park are agreed in advance. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- Each joint is checked and the colour of the new sealant agreed.
- Failed sealant is removed back to clean, sound faces.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- We prime the faces where required.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Before we arrive
- Tell us if parking is tricky
- Mention if the joints have been sealed before
- Where the joints are inside, avoid wetting them before we arrive
How to get a quote
Every job is quoted individually, so the first step is telling us about yours. Just call 0345 464 0079 or send us an email with the details.
Related advice
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Looking after it afterwards
Simple care keeps the joints in good condition. Our advice:
- Keep water from gutters off the wall
- Clear growth from the base of walls and joints
- Make sure movement joints are not pointed over
- Avoid pressure-washing directly into sealant joints
Do not let soil, plants or ivy build up against the new joints. Anything that holds water against the joint wears it out sooner.
Act while the splits are small. Then it’s a straightforward cut-out and reseal with no damage behind it to deal with.
What affects the cost of external mastic
The quote reflects the job in front of us. We look at:
- The number of rooms or windows
- Any mould that needs treating
- Which sealant suits the joint
- Any working-time requirements on site
The cost reflects the work involved, not guesswork. That is why we ask about the job first.
Helping us quote
What to tell us when you ask for a quote:
- A few pictures by email, if you can
- If it’s domestic, commercial or a hotel
- The problem you’ve noticed
- Access, such as stairs, a lift or height
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints.