South East England and London
External Mastic in Southampton
From the largest town to the smallest village in Southampton, we can help with external mastic. A clear quote before we start, and a one-year guarantee.
External mastic in every part of Southampton
Sealing brickwork movement joints, render, cladding and façade joints. Choose your town from the list to see local details, and get in touch for a quick quote.
Biggest towns in Southampton
Other services in Southampton
- Window & door mastic
- Floor & skirting joints
- Fire-rated sealant
- Regrouting
- Gutter, fascia & soffit sealing
- Sand mastic for sash & case windows
- Commercial & hotel sealant
- New-build mastic & snagging
- Remedial sealant & repairs
- Glazing & conservatory sealant
- Bathroom & kitchen resealing
Postcode areas we cover
About external mastic in Southampton
Short cuts in external joints show up within a season or two. New sealant over old, joints packed with mortar and beads with no backing all tend to fail early. We take the old material out and do it properly. We work on brickwork movement joints, render & cladding joints and joints between brick and frames, and common reasons people get in touch are sealant pulling away from one side of the joint and plants rooting in failed movement joints.
You don’t need to clear the whole room or building, just the space around the work. Everything nearby is protected, and the job takes a few hours for a handful of joints, longer for a whole elevation for a typical job.
- 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.
Pricing in Southampton
Leaving a failed joint usually makes the job bigger, not smaller. If you’re unsure, ring 0345 464 0079 or drop us an email for an honest opinion and a quote.
What you get with us
- Every job guaranteed for a year
- You choose the colour before work begins
- Fully insured
- Old sealant always removed completely
Get a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and email pictures if that’s easy.
What’s near Southampton
In Southampton, that means homes and buildings near Saint Mary's, St Mary's Independent School and Rockstone Place Park, among other places. Nearby too are Bevois Town Primary School (under half a mile west), The Hobbit pub (less than half a mile west) and St Anne's Catholic School (0.6 miles south-west). Southampton has its own railway station: St Denys station. Well-known places in the area include Marlands Shopping Centre (1 mile south-west) and R J Mitchell Museum (0.9 miles south-west). Open spaces near Southampton include Netley Common.
External mastic across Southampton: local notes
Southampton has everything from period brickwork to rendered and clad modern buildings. The joints between different materials are the usual weak points, wherever the building is in Southampton.
Hard water across most of the South East leaves limescale on sealant, grout and fittings. For any job in Southampton, joints are cleaned back properly before anything new goes in. Southampton includes coastal places, where outside joints face more wind, rain and salt than they would inland. Joints on seaward walls tend to fail first.
Southampton: If you let a flat or house near St Denys station, split movement joints are easy to miss on a rental until damp shows inside. Homes close to Saint Mary's include some older properties, and older walls, gutters and the joints where extensions meet them need a flexible sealant.
Landlord and commercial work in Southampton
Mouldy or split sealant often shows up at the end of a tenancy. Several properties can be quoted together.
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.
How to look after the new joints
Joint life depends on how it’s used and looked after. We suggest:
- Act on the first splits you see
- Look over the joints every year, ideally after winter
- Show decorators and builders where the movement joints are
- Keep water from gutters off the wall
Follow the cure time we give you before the joint is knocked or disturbed. The surface skins over quickly, but full cure takes longer.
Gaps, plants or missing sealant in a joint are worth getting looked at. Early work is quicker and leaves a better finish.
Surface by surface
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.
Concrete and blockwork
Big joints in concrete need careful depth control. We size the backing rod to the gap so the sealant is not too deep.
What happens if it’s left?
An open joint keeps letting water into the wall with every downpour. In cold weather, frost can damage wet brick and render, so the damage spreads beyond the joint.
Questions to ask before booking
- Is the old sealant removed completely?
- When the joint can take water or movement
- What product goes in the joint
- Is VAT in the price?
When it isn’t the sealant
We’d rather tell you now than do work that won’t last, so these are the limits:
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Cracking across the wall rather than at a joint
- Failed render or damaged cladding panels
FAQs for Southampton
Is there a guarantee?
Yes. Every job comes with a 12-month guarantee.
Can you seal joints between render and window frames?
Yes. We cut out the old sealant, prepare both faces and reseal with a flexible exterior product. We pick a colour that works with both materials.
Do you hold any approvals?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
Can you do several jobs on one visit?
Yes, and it often makes sense. Doing several areas at once is normally more efficient.
How long before the joint can be used?
It depends on the product. We tell you how long to leave it before we go.
Is it OK to seal over old sealant?
No, it will not last. It may look fine at first, but the new layer lifts away from the old one. The old sealant has to come out completely.
Do you work at height?
It depends on the building. Where joints can be reached safely, we’ll do them. Give us some details and we will confirm the access.