Hampshire · England
Shalden Green External Mastic
Problem with your movement joints in Shalden Green? We remove the old material, prepare the joints and seal them properly, with a one-year guarantee.
- Sealant pulling away from one side of the joint
- Water getting into walls through failed joints
- Plants rooting in failed movement joints
When to call us in Shalden Green
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.
Look out for any of the following:
- Weathered mastic that no longer stretches
- Water getting into walls through failed joints
- Brick movement joints where the sealant has split
- Failed seals between different materials
For landlords with property near Alton station, outside joints that have cracked can let damp into a rental, so check them between lets.
What to look for in a quote
- How long the guarantee is
- How the surfaces are prepared before sealing
- How much experience the applicator has
- How hidden problems are handled
External mastic in Shalden Green, done properly
For buildings in Shalden Green, we reseal external joints of all kinds, from brick movement joints to cladding panels. Every joint gets the same careful preparation: clean, sound faces and a controlled depth. We work on joints between brick and frames, concrete & block and render & cladding joints, and common reasons people get in touch are brick movement joints where the sealant has split and old sealant gone brittle and cracked.
Older homes in small places like Shalden Green may be stone, brick or timber-framed, often with later extensions. The joints where those materials meet are the weak points.
We stand behind the work with a 12-month guarantee.
- Where
- Shalden Green (GU34)
- Region
- Hampshire
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Also in Shalden Green
Questions from Shalden Green
Do you cover smaller places like Shalden Green?
Yes, we do. We work across London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Do you work for landlords with property near Alton station?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or email us with the address and a few details, and we will give you a fixed price before any work starts.
Can you seal joints between render and window frames?
Yes. Different materials move at different rates, so the joint between them must be flexible. We choose one that suits both surfaces.
Do the sealants smell?
That depends on the sealant. Some smell for a while, some hardly at all, and any smell fades as they cure.
Where is Mr Mastic based?
Our base is in Crawley, and we work across South East England, London and Scotland.
What information do you need?
Where the job is, what the problem is and roughly how big it is. Photos by email help too.
Is it worth trying it myself?
Sometimes. The key is preparation: remove all the old material and work on a clean, dry joint. If it doesn’t work out, we can redo it.
What is backing rod for?
Backing rod goes into deeper joints as a matter of course. It controls the depth and stops the sealant bonding to the back so the bead can stretch.
DIY versus a professional finish
A DIY attempt does not rule out a professional job. We remove it and do the joint properly, so tell us about it when you ask for a quote.
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
Outside joints around Shalden Green
Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Historic houses like Hall Place (about 3.1 miles south-west) are a reminder that the area around Shalden Green has older buildings as well as new. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material.
Historic houses such as Hall Place, about 3.1 miles south-west, show how far back building around Shalden Green goes, and older homes nearby need a sealant that suits their walls.
Shalden Green is about 3 miles north-west of Alton, in Hampshire. Anywhere in GU34, we can carry out external mastic at your property. Shalden Green is one of 683 places in Hampshire we cover for external mastic. You can also see our page for Reading, about 18 miles away.
We work across GU34 for external mastic. If you are just outside Shalden Green, we cover Shalden (1 mile south), Southrope (2 miles north-west), Bagmore (2 miles west), Burkham (3 miles west) and Bentworth (3 miles south-west). Further out, we also cover Basingstoke (7 miles north-west), Farnborough (13 miles north-east), Fleet (9 miles north-east), Aldershot (11 miles east), Alton (3 miles south-east) and Petersfield (13 miles south).
Landmarks near Shalden Green
Around Shalden Green, our work takes us to homes and buildings near The Golden Pot pub, among other places. The closest station to Shalden Green is Alton station, about 2.9 miles south-east. A little further out are Gliding Heritage Centre (0.9 miles west) and Alton Community Hospital (3.3 miles south). For a walk, there’s Holybourne Hill.
Leave it or put it right?
A properly done movement joint is an even line in a colour that suits the wall. A hurried job with smeared edges and no backing looks worse and fails sooner so it’s worth doing right. Around Shalden Green, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
No two jobs are quite the same, so we quote each one individually. Size, access and the product the joint needs all play a part, and we will explain the quote if you ask.
Why choose Mr Mastic in Shalden Green
- We never seal over old sealant
- Rated 4.9 stars on Google
- Quality sealants from Arbo and Everbuild
- Experience in homes, commercial sites and hotels
Read how sealant jobs are priced and customer reviews.
Aftercare tips
Aftercare is simple, and it makes a real difference:
- Leave the joints unpainted unless we have said otherwise
- Check external joints each spring
- Do not let climbing plants root in the sealant
- Keep high-pressure jets off the joints
Give the sealant the cure time we tell you before anything rubs against it. Most exterior sealants skin fast but take longer to cure right through.
Small splits are the time to act. Then it’s a straightforward cut-out and reseal with no damage behind it to deal with.
How the visit works
Good joint work is mostly preparation, and we don’t rush it. Every joint is cleaned and dried before new material goes in. In total, it normally takes anything from a few hours to several days, depending on the building. Somewhere as small as Shalden Green, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- 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.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
Before we arrive
- Keep pets and children clear of the area while we work
- Clear items away from the joints we are working on
- Tell us about access, such as stairs, a lift or high-level joints
How to get a quote
We quote each job on its own, so start by telling us what you need. Just ring 0345 464 0079 or send us an email with the details.
Related advice
Honest limits
A few problems are outside what sealant work can do:
- Adding movement joints to masonry that has none
- Structural movement, which needs a surveyor or engineer
- Render that is blown, hollow or coming away
If in doubt, ring 0345 464 0079 or drop us an email and we’ll say what we think before you book.
Joints and surfaces we work on
- Brickwork movement joints
- Render & cladding joints
- Joints between brick and frames
- Façade panels
- Concrete & block
- Copings & trims
Landlords, agents and businesses in Shalden Green
We work for landlords and agents as well as householders. Sealant work between tenants is a simple way to keep a property in good order before the next move-in.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.