Hampshire · England
External & façade joints in Charlton, Hampshire
We cover Charlton for sealing brickwork movement joints, render, cladding and façade joints. Old material cut out, joints cleaned and sealed neatly and every job guaranteed for a year.
- Movement joints with cracked, split or missing sealant
- Joints pointed up with cement by mistake
- Panel joints letting water in
External mastic for homes and businesses in Charlton
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 so the joint does not stand out. We work on concrete & block, render & cladding joints and façade panels, and the jobs we see most are joints with sealant missing in places and rigid filler in a joint that should flex.
External sealant needs dry, clean surfaces, so work around Charlton is planned for dry weather. Let us know about access to every wall, plus any garages or outbuildings.
We stand behind the work with a 12-month guarantee, so you’re not left on your own once the job is done.
- Place
- Charlton (SP10)
- Wider area
- Hampshire
- Guarantee
- One year on every job
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Landlords, agents and businesses in Charlton
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. We can quote for more than one property at once.
From a single let to a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.
Common questions in Charlton
Can you do external mastic in Charlton?
Yes, Charlton is within the area we cover. Our work covers London and the South East. You can call 0345 464 0079 or email us and let us know what needs doing.
Do you work for landlords with property near Andover station?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or drop us an email with the address and a few details, and we will give you a fixed price before any work starts.
Should I try DIY first?
You can, for simple jobs. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
Can you reach joints on upper floors?
That depends on the building and the joints. We work on joints that can be reached safely. Give us some details and we’ll confirm the access.
Why do you put foam in the joint first?
Backing rod controls the sealant depth and keeps it off the back of the joint. Then the sealant bonds to two faces and can move.
Are you an approved applicator?
Yes. Mr Mastic is an ARBOMaster approved applicator, and we’re fully insured.
What information do you need?
The location, the problem and the rough size of the job. Photos by email help too.
How much does external mastic cost in Charlton?
Every job is different, so each one gets its own quote. To get one, ring 0345 464 0079 or drop us an email with a short description of the job.
Towns and villages near Charlton
What else we do in Charlton
How we quote for external mastic
There’s no set price list, because no two jobs are the same. The quote depends on:
- The number and length of the joints
- Whether old sealant or filler has to be cut out
- When we can work, for business premises
- Any mould that needs treating
What it costs depends on the size of the job, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before work begins, so you know where you stand.
Helping us quote
To make quoting easier, let us know:
- What the problem is, such as mould, gaps, leaks or cracking
- Where the job is, and your postcode
- A few pictures by email, if you can
- Any previous sealing or DIY work
To get a quote, ring 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. We will send you a clear quote before any work starts.
Honest limits
We will always be straight with you, so here’s what sealant can’t fix:
- Rising or penetrating damp from elsewhere in the wall
- Adding movement joints to masonry that has none
- 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
- Façade panels
- Joints between brick and frames
- Render & cladding joints
- Copings & trims
- Concrete & block
- Brickwork movement joints
How it works
Good joint work is mostly preparation, so that is where we spend the time. Every joint is cleaned and dried before new material goes in. All told, the work takes anything from a few hours to several days, depending on the building. Somewhere like Charlton 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.
- First we look over the joints with you, agree which to renew and talk through access.
- We cut out the failed sealant and rake out any dirt or growth.
- Both sides are cleaned back to sound material and primed if needed.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
Getting ready for the visit
- Clear the area around the work
- Keep children and pets away from the work area
- Tell us about access, such as stairs, a lift or high-level joints
Get a quote
Need a quote? Please phone 0345 464 0079 or drop us an email and tell us about the job. We’ll explain what we’d do and give you a clear price before we start.
Advice
Keeping the joints in good condition
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Keep water from gutters off the wall
- Never let anyone fill a movement joint with mortar
- Point out the joints to other trades
- Check external joints each spring
If you have more work done on the wall, such as new render, cladding or an opening, show the contractor the movement joints. They must stay as flexible joints, never rendered or pointed over.
Small splits are the time to act. Then it’s a straightforward cut-out and reseal.
DIY sealant or a professional job?
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it doesn’t work out, we can still put it right.
A DIY attempt does not rule out a professional job. We cut it out and start again.
External mastic in Charlton: local notes
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For site and facilities teams at buildings such as Harrow Way Community School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. Letting a property close to Andover station? Then outside joints that have cracked can let damp into a rental, so check them between lets.
Charlton is about 1 mile north-west of Andover, in Hampshire. We provide external mastic to homes and businesses in Charlton and nearby. Our Hampshire coverage runs to 683 places, Charlton among them. For nearby work, see our Southampton page, about 22 miles away.
Postcode districts we cover here for external mastic: SP10. Whether your property is on Dacre Close, Home Farm Gardens and Augustine Way or anywhere close by, we can help. Nearby, we also carry out external mastic in Foxcotte (1 mile north-west), Penton Mewsey (1 mile west), Penton Corner (1 mile west), Penton Grafton (1 mile west) and Red Post Bridge (2 miles south-west). Within a short drive, we also cover Winchester (14 miles south-east), Hyde (13 miles south-east), Tidworth (7 miles west), Weeke (13 miles south-east), Stanmore (14 miles south-east) and Ludgershall (6 miles north-west).
Around Charlton
In Charlton, that means homes and buildings near Portway Infant School. The nearest railway station is Andover station, roughly 0.8 miles south-east. Other landmarks nearby include Andover War Memorial Hospital (0.5 miles south-east) and Andover Museum (1.3 miles south-east). The countryside around Charlton includes Anton Lakes and Mill Lake.
Do you need external mastic in Charlton?
The wrong product in a moving joint is a classic cause. A high-modulus or general-purpose sealant can be too rigid for a busy joint, and it tears off the sides.
The most common problems we see are:
- Brick movement joints where the sealant has split
- Joints where the bead has come unstuck
- Joints pointed up with cement by mistake
- Failed seals between different materials
If you live in an older home near St Thomas, an extension built onto an older house moves differently, and the joint between them takes the strain.
What to look for in a quote
- What insurance they hold
- How the surfaces are prepared before sealing
- How long the guarantee is
- Whether they seal over old material or remove it