Southampton · England
External & façade joints in Itchen, Southampton
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Itchen and across Southampton. Fully insured, ARBOMaster approved and guaranteed for a year.
- Movement joints filled with mortar instead of sealant
- Cracked joints where brick meets render or frames
- Sealant pulling away from one side of the joint
How we handle external mastic in Itchen
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. We work on copings & trims, joints between brick and frames and façade panels, and the jobs we see most are joints where the bead has come unstuck and failed seals between different materials.
Homes around Itchen range from older cottages to newer houses, with walls and rooflines of every type. Older homes need their gutter and trim joints kept tight, newer ones their movement joints.
Our work is backed for twelve months.
- Location
- Itchen (SO19, SO14)
- Wider area
- Southampton
- Cover
- A year, on every job
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Why it’s worth doing now in Itchen
A low-modulus sealant is chosen because it moves without pulling hard at the edges. That protects surfaces like brick, render and concrete. A stiffer product can damage the joint edge as it fails. In a smaller place like Itchen, wherever a wall is exposed, a failed outside joint is a real source of damp. Inside, a split seal lets water into floors and panels just as it would anywhere.
Some things make a job bigger or smaller: the old material and how easily it comes out, whether mould needs treating, and whether we need extra access for height. We take all of that into account in your quote.
What you get with us
- We’re fully insured
- More than 20 years in sealant work
- White, clear, grey or coloured to suit, where the product allows
- We never seal over old sealant
Read our cost guide or customer reviews.
For landlords and businesses
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.
From a single let to a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a 12-month guarantee.
What sealant work cannot fix
We will always be straight with you, so here’s what new sealant won’t do:
- Cracking across the wall rather than at a joint
- Render that is blown, hollow or coming away
- Rising or penetrating damp from elsewhere in the wall
If you’re not sure, just ring 0345 464 0079 or email us and we’ll give you a straight answer before you book.
Where we work in Itchen
- Copings & trims
- Façade panels
- Brickwork movement joints
- Render & cladding joints
- Joints between brick and frames
- Concrete & block
How the job changes by surface
Cladding and façade panels
Where a cladding system has its own specified sealant, we follow it. Tell us what the building has when you get in touch.
Brickwork movement joints
Brick walls have vertical movement joints to absorb expansion. They’re resealed over backing rod with a low-modulus sealant in a colour to suit the brick.
Itchen: your questions answered
Is external mastic in a coastal place like Itchen any different?
Coastal homes put outside sealant through more weather than inland ones, so preparation and the right sealant matter all the more. Walls facing the sea are normally the first to need attention.
Will you come out to Itchen?
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.
Is there any odour?
Possibly a little. Any smell clears as the sealant cures.
Will the old sealant be removed?
Yes, always, and completely. New silicone doesn’t stick to old silicone, so the joint is cleaned back first.
Can I add another job to the visit?
Yes, and it often makes sense. Doing several areas at once is generally more efficient.
Is there a guarantee?
Yes. All our work carries our 12-month guarantee.
Do you do commercial work?
Yes, regularly. Larger jobs can be planned room by room or area by area to suit the site.
Why do you put foam in the joint first?
Closed-cell backing rod sets the depth of the sealant and stops it sticking to the back of the joint. Then the sealant bonds to two faces and can move.
Walls and rooflines in Itchen
Itchen is within about 1 mile of 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. Historic houses like Medieval Merchant's House (about 1.5 miles west) are a reminder that the area around Itchen has older buildings as well as new. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material.
Homes close to Jesus Chapel - St Mary Extra include some older properties, and an extension built onto an older house moves differently, and the joint between them takes the strain. For site and facilities teams at buildings such as Ludlow Junior School, larger buildings have long runs of movement joint that eventually need resealing. For landlords with property near Woolston station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Itchen is about 2 miles south-east of Southampton, in Southampton. We carry out external mastic for homes and businesses in Itchen and nearby. Itchen is one of 40 towns and villages in Southampton where we work.
We work across SO19 and SO14 for external mastic. You’ll find streets such as Sea Road, Oak Road and West Road, and we cover them all. Itchen is on the A3025, so it’s easy for us to get to with everything needed for external mastic. Other places close to Itchen include Peartree Green (1 mile north-west), Northam (1 mile north-west), Sholing (1 mile east), Bitterne (1 mile north-east) and St Mary's (1 mile west). Within a short drive, we also cover Shirley (3 miles north-west), Regents Park (3 miles west), Maybush (4 miles north-west), Coxford (4 miles north-west), Freemantle (3 miles west) and Lordswood (4 miles north-west). Itchen is among the bigger towns we cover in Southampton.
Around Itchen
Typical jobs here are in homes near Houndwell Park, Woolston School and Oasis Academy Sholing. There’s a railway station in Itchen itself: Woolston station. Other landmarks nearby include Bitterne Local History Society Heritage And Research Centre (0.9 miles north) and Marlands Shopping Centre (1.6 miles west). Green spaces nearby include Netley Common.
Looking after it afterwards
To keep the joints looking good and working properly:
- Avoid pressure-washing directly into sealant joints
- Have failed joints looked at early
- Look over the joints every year, ideally after winter
- Keep movement joints as flexible joints, not mortar
Keep the joints clear of soil, plants and climbing growth. Damp material against the sealant shortens its life.
Gaps, plants or missing sealant in a joint are worth getting looked at. Early work is quicker and leaves a better finish.
DIY versus a professional finish
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
Places near Itchen
Other services in Itchen
What happens on the day
When we arrive, we start by going over the job with you, so there are no surprises. We protect the surfaces around the joints before we start. The work usually takes a few hours to a few days, depending on the length of joint and the access. A visit to Itchen is planned like any other: the time, the access and where to park are agreed in advance. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Getting ready for the visit
- Keep pets and children clear of the area while we work
- Let us know if you’ve seen damp or leaks
- Move anything stored near the joints
Ask for a quote
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we’ll explain how we’d tackle it. When it suits you, phone 0345 464 0079 or email us.