Hampshire · England
External & façade joints in Martin, Hampshire
External mastic for Martin and the surrounding area: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Gaps where render, brick and frames meet
- Plants rooting in failed movement joints
- Joints with sealant missing in places
About our external mastic in Martin
Failed sealant is cut out, the depth set with closed-cell backing rod, and the joint resealed with a low-modulus sealant made for outside. We pick a colour that sits well with the wall. If you’re dealing with damp patches traced to an open external joint and joints where the bead has come unstuck, we can help, on copings & trims, joints between brick and frames and render & cladding joints alike.
In a village or hamlet like Martin, older cottages and farm buildings often stand in the open, where walls and rooflines take the weather head on. Gutter joints and wall joints there need a sealant that can flex and stay put.
A one-year guarantee comes as standard, so you’re covered after we’ve gone.
- Location
- Martin (SP6)
- Wider area
- Hampshire
- Cover
- A year, on every job
- Quote
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Why act early in Martin
An open joint keeps letting water into the wall with every downpour. In cold weather, frost can damage wet brick and render near the open joint, so the problem grows beyond the joint itself. Around Martin, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you’re not sure whether it needs doing, ring 0345 464 0079 or send us an email and we’ll give you an honest view and a quote.
What you get with us
- Full insurance on every job
- Anti-fungal sanitary silicone in wet areas
- Every job guaranteed for a year
- A sealant colour to suit the surroundings
Take a look at how sealant jobs are priced and customer reviews.
Different surfaces, different methods
Copings and trims
Joints in copings, parapets and trims are exposed to the worst of the weather. Each is resealed with a weatherproof, flexible sealant.
Brickwork movement joints
Brick walls have vertical movement joints to absorb expansion. They’re resealed over backing rod with a low-modulus sealant.
Martin buildings and the weather
The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
In and around Martin, as anywhere, good external mastic starts with a clean, dry, properly prepared joint.
Martin is in Hampshire. Whether you are in the middle of Martin or further out, we cover external mastic for every kind of property. Our Hampshire coverage runs to 683 places, and Martin is one of them. There’s also a page for Southampton, roughly 23 miles from Martin.
We cover every part of the SP6 postcode area for external mastic. External mastic is available to properties on Townsend Lane and Downview Road and the roads around them. If you are just outside Martin, we cover New Forest (1 mile south-west), Rockbourne (3 miles east) and Damerham (3 miles south-east). Larger places within reach include Ringwood (11 miles south-east), Fordingbridge (6 miles south-east), St Leonards (11 miles south), Alderholt (6 miles south-east), Poulner (11 miles south-east) and Ashley Heath (10 miles south).
Landmarks near Martin
A little further out are Cranborne Castle Hill (4.5 miles south). The countryside around Martin includes Western Downs.
How it works
On the day, we look over the joints with you first. We protect the surfaces around the joints before work begins. Most jobs take a few hours to a few days, depending on the length of joint and the access. Somewhere like Martin needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- Each joint is checked and the colour of the new sealant agreed.
- Failed sealant is removed back to clean, sound faces.
- Backing rod goes in so the sealant can stretch between the two faces.
- We prime the faces where required.
- We gun in low-modulus sealant and tool it neatly.
How to prepare
- Let us know about stairs, lifts or work at height
- Tell us about any previous sealing or DIY attempts
- Mention any leaks or damp you’ve noticed
Get a quote
Call for a quick quote, or email us if that’s easier. Tell us about the joints that need doing and we will explain what’s involved before giving you a price.
Advice
For landlords and businesses
We work for letting agents and landlords as well as householders. Sealant work between tenants keeps a property looking cared for.
Housing providers, facilities teams and property managers book us too in Martin and across Hampshire. We can quote a run of properties together, and we’re fully insured.
Aftercare tips
Good habits help new joints last longer. Our tips:
- Walk round the building once a year and look at the joints
- Leave the joints unpainted unless we’ve said otherwise
- Keep movement joints as flexible joints, not mortar
- Avoid pressure-washing directly into sealant joints
Have a quick look at the joints each spring. Splits, gaps at the edges or plants in the joint are early warning signs.
An open movement joint lets rain into the wall every time it pours. That can lead to damp patches, staining and frost damage which cost more to put right than the joint.
Places near Martin
What else we do in Martin
What we can’t put right
We won’t take on 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
If in doubt, call 0345 464 0079 or drop us an email and we will say what we think before booking.
Joints and surfaces we work on
- Render & cladding joints
- Façade panels
- Brickwork movement joints
- Concrete & block
- Copings & trims
- Joints between brick and frames
Martin questions
Is there a guarantee on external mastic in Martin?
Every job comes with our one-year guarantee, wherever it is. We are fully insured, and an ARBOMaster approved applicator.
Can you do external mastic in Martin?
Yes, Martin is within the area we cover. Our work covers London and the South East. Just phone 0345 464 0079 or email us with a few details of the job.
How long does external mastic take?
Most jobs take anything from a few hours to several days, depending on the building. We will confirm how long when we quote.
Will you leave a mess?
We keep the work tidy. Nearby surfaces are protected, and the area is left clean when we finish.
Is it worth trying it myself?
Sometimes. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
Are you insured?
Yes. We are fully insured, and we can confirm the details when we quote.
Which products do you use?
Quality sealants from brands including Arbo and Everbuild, picked for each joint. We explain the product when we quote.
What colours does the sealant come in?
The sealant colour is picked to suit the wall. Exterior sealants come in a good range of colours.
What we’re called out for in Martin
UV, rain and frost all age exterior sealant. In time it goes hard, crazes on the surface and stops stretching, so the next time the wall moves, it splits or pulls away.
Any of these means the joints need attention:
- Joints pointed up with cement by mistake
- Sealant pulling away from one side of the joint
- Joints with sealant missing in places
- Failed sealant between panels on a façade
If you live in an older home near Church of All Saints, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Before booking anyone
- What guarantee comes with the work
- How the joint is cleaned and prepared
- What happens if they find a problem under the old sealant
- Who does the work, and how experienced they are