Hampshire · England
External Mastic in Nashes Green
We cover Nashes Green for sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly and a one-year guarantee.
- Failed seals between different materials
- Joints where the bead has come unstuck
- Joints with sealant missing in places
Landlords, agents and businesses in Nashes Green
Mouldy or split sealant often shows up at the end of a tenancy. We can quote for more than one property at once.
Letting agents often deal with us directly. Tell us the address, the job and how access works and we’ll give you a quote.
External mastic for homes and businesses in Nashes Green
Many failed façade joints only get noticed once there’s a stain or a damp patch inside. We inspect them, agree which need doing and reseal with a weatherproof, flexible sealant in a matching colour. We work on joints between brick and frames, concrete & block and render & cladding joints, and the jobs we see most are joints pointed up with cement by mistake and sealant that has lost its bond to the brick or render.
Around Nashes Green, older buildings can be stone, brick or timber-framed, many with extensions added later. The joints where those materials meet are the weak points, and they need the right sealant at the right depth.
The work is guaranteed for twelve months. If something isn’t right with it in that time, tell us and we’ll put it right.
- Where
- Nashes Green (RG25)
- Region
- Hampshire
- Cover
- A year, on every job
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Questions from Nashes Green
Do you cover Nashes Green for external mastic?
Yes. We work across London and the South East, and Nashes Green is part of that. Just call 0345 464 0079 or drop us an email with a few details of the job.
I let a flat near Alton station. Can you help?
Yes, we work for letting agents and landlords. You can call 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.
What is backing rod for?
Backing rod controls the sealant depth and keeps it off the back of the joint. That way it bonds to the two sides only and can stretch.
Why is there a gap in my brick wall?
It’s a deliberate gap that lets the wall expand and contract without cracking. It’s sealed with a flexible sealant, not mortar.
What do you put in the joint?
Products from Arbo and Everbuild, among others, 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. There’s a wide choice of exterior colours.
Do you have insurance?
Yes. Full insurance covers our work, and we can confirm the details when we quote.
Can you do several jobs on one visit?
Yes. Just list everything you need and we’ll quote it together.
What sealant work can’t fix
We’d rather tell you now than do work that won’t last, so these are the limits:
- Cutting new joints into brickwork, which is building work rather than sealant work
- Loose or hollow render, which needs re-rendering
- Rising or penetrating damp from elsewhere in the wall
Not sure which it is? You can call 0345 464 0079 or send us an email and we will tell you honestly.
Where we work in Nashes Green
- Render & cladding joints
- Copings & trims
- Concrete & block
- Façade panels
- Joints between brick and frames
- Brickwork movement joints
Common problems we fix in Nashes Green
Using the wrong sealant is another common reason. A stiff, general-purpose sealant cannot cope with a joint that moves a lot, so it pulls away from the edges.
People generally contact us when they notice one of these:
- Weeds or debris growing in open joints
- Joints with sealant missing in places
- Leaking joints around cladding and façade panels
- Hard, crazed mastic that has stopped moving
If you live in an older home near Church of St. Mary, the joints between older walls, newer extensions and the roofline need a sealant that can move.
Before you book anyone
- Whether VAT is included
- When the joint can take water or movement
- What happens if the job turns out different
- What insurance they hold
Looking after it afterwards
Once the sealant has cured, a few habits help it last:
- Point out the joints to other trades
- Keep high-pressure jets off the joints
- Look over the joints every year, ideally after winter
- Keep soil, plants and ivy away from the joints
Look over the joints once a year, ideally after winter. Watch for splits, edges coming away or growth in the joint.
Act while the splits are small. At that stage it’s a simple cut out and reseal.
How it works
When we get to you, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. Most jobs then take a few hours for a handful of joints, longer for a whole elevation. In a small place like Nashes Green, access is normally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First, the joints are inspected and the access agreed.
- Every bit of old sealant and any mortar or debris is cut out.
- Joint faces are cleaned back and primed if the sealant needs it.
- We fit closed-cell backing rod to control the depth.
- The exterior sealant is applied, tooled and checked along its length.
Preparing for the visit
- Clear items away from the joints we are working on
- Tell us about any previous sealing or DIY attempts
- For business premises, tell us about site rules or sign-in
Getting a quote
It all starts with a short chat. Describe the problem, the location and the size of the job, and we will talk you through what we’d do. When it suits you, ring 0345 464 0079 or send us an email.
Advice
Different surfaces, different methods
Concrete and blockwork
The face of concrete or block is often dusty, so cleaning and priming matter. A primer goes on where the product requires one before the bead.
Joints between dissimilar materials
Joints where frames, sills or panels meet the wall are common leak points. The old joint is removed and a sealant that bonds to both sides goes in.
Outside joints around Nashes Green
Historic houses like Hall Place (about 3.3 miles south) are a reminder that the area around Nashes Green has older buildings as well as new. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth. London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you let a flat or house near Alton station, outside joints that have cracked can let damp into a rental, so check them between lets.
Nashes Green is about 5 miles north-west of Alton, in Hampshire. For external mastic in and around Nashes Green, please phone 0345 464 0079 or email us for a quick quote. We are based in Crawley and cover Hampshire. Our area takes in 683 places across Hampshire, large and small. There’s also a page for Reading, about 17 miles away.
We cover every part of the RG25 postcode area for external mastic. Nearby, we also carry out external mastic in Ellisfield (2 miles west), Upton Grey (2 miles north-east), Upper Common (3 miles west), Cliddesden (3 miles north-west) and Viables (4 miles north-west). We also work in nearby towns such as Basingstoke (5 miles north-west), Farnborough (13 miles north-east), Fleet (10 miles north-east), Aldershot (12 miles east), Alton (5 miles south-east) and Petersfield (14 miles south).
Around Nashes Green
Nashes Green’s nearest station is Alton station, about 4.7 miles south-east. Well-known places in the area include Gliding Heritage Centre (1.4 miles south-east) and Basing House (4.6 miles north). The countryside around Nashes Green includes Holybourne Hill.
Places near Nashes Green
More services for Nashes Green
Leave it or put it right?
Mortar or ordinary filler might look like a quick way to close an open joint, but it stops the joint moving. The movement then cracks the brickwork or render nearby. The correct repair is a flexible sealant with the right backing. Older cottages and farmhouses around Nashes Green can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
The cost reflects the work involved, not a rough estimate. That is why we ask about the job first.
Why us?
- We’re fully insured
- Any old sealant cut out fully, not covered over
- A 12-month guarantee on all work
- Colour picked to suit the job
Read our cost guide and our reviews.