Surrey · England
Ash Green External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for Ash Green, backed by a one-year guarantee. Ask us for a quote.
- Water getting into walls through failed joints
- Plants rooting in failed movement joints
- Brick movement joints where the sealant has split
About our external mastic in Ash Green
We are ARBOMaster approved applicators, and each external joint gets a sealant suited to it. Some surfaces need a primer before sealing. If you’re dealing with water getting into walls through failed joints and gaps where render, brick and frames meet, we can put it right.
Around Ash 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.
We guarantee the work for a year. If something isn’t right with it in that time, tell us and we’ll put it right.
- Where
- Ash Green (GU12)
- Region
- Surrey
- Guarantee
- 12 months on all our work
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Landlord and commercial work in Ash Green
Failed sealant is one of the commonest items on a check-out report. We can quote for more than one property at once.
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.
Looking after it afterwards
How long the joints last depends on use and care. Here’s what we suggest:
- Point out the joints to other trades
- Walk round the building once a year and look at the joints
- Keep high-pressure jets off the joints
- Keep soil, plants and ivy away from the joints
Have a quick look at the joints each spring. Watch for splits, edges coming away or growth in the joint.
An open movement joint lets rain into the wall every time it pours. Over time it can mean damp inside, stained render or frost-damaged brick which cost more to put right than the joint.
The process
The work is kept neat and contained to the area we are working on, so you can carry on as normal. Expect the work to take a few hours to a few days, depending on the length of joint and the access, and we tell you how long to leave it before we go. Somewhere as small as Ash Green, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We look at every joint and agree a colour to suit the wall.
- Failed sealant is removed back to clean, sound faces.
- Backing rod goes in so the sealant can stretch between the two faces.
- Primer is applied wherever the sealant needs it.
- We gun in low-modulus sealant and tool it neatly.
Before we arrive
- Clear items away from the joints we’re working on
- Keep pets and children clear of the area while we work
- On commercial sites, let us know about site rules
How to get a quote
Getting a quote is simple: let us know what needs doing and where and its rough size. A few pictures by email make the job easier to understand, and we will come back to you with a quote.
Related advice
What external mastic looks like in Ash Green
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. With historic houses such as Wanborough Manor (about 2.1 miles east) nearby, there’s older building stock in the area around Ash Green as well as newer homes. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material.
Letting a property close to Ash station? Then outside joints that have cracked can let damp into a rental, so check them between lets. Homes close to Church of St Peter include some older properties, and older walls, gutters and the joints where extensions meet them need a flexible sealant.
Ash Green is about 2 miles east of Aldershot, in Surrey. Homes, rented property, offices and hotels in Ash Green can book us for external mastic, old or new, large or small. The work is guaranteed for a year. Across Surrey, we cover 395 places, and Ash Green is one of them. We also work in Reading, about 18 miles from Ash Green.
Here we cover the GU12 postcode area for external mastic. If you need external mastic at a property on Compass Rose Road, Drovers Way and Ash Green Lane East or anywhere close by, we can help. Nearby, we also carry out external mastic in Ash (1 mile west), Tongham (1 mile south-west), Seale (1 mile south), Ash Vale (2 miles north-west) and Sandy Cross (2 miles south-west). Within a short drive, we also cover Guildford (6 miles east), Woking (8 miles north-east), Camberley (6 miles north), Farnham (4 miles south-west), Egham (15 miles north-east) and Frimley (5 miles north).
Landmarks near Ash Green
Around Ash Green, our work takes us to homes and buildings near The Dover Arms, The Connaught School and Ash Manor School and the streets around them. The closest station to Ash Green is Ash station, about 0.6 miles north-west. A little further out are Farnham Castle (4.4 miles west) and Guildford Hospital (4.2 miles east). Open spaces near Ash Green include Ash Ranges and Hog's Back.
When it is not the sealant
In fairness, some problems need a different trade:
- Structural movement, which needs a surveyor or engineer
- Adding movement joints to masonry that has none
- Cracked brickwork or render that needs a builder or plasterer
Not sure which it is? You can call 0345 464 0079 or send us an email and we’ll tell you honestly.
Joints and surfaces we work on
- Copings & trims
- Concrete & block
- Render & cladding joints
- Brickwork movement joints
- Façade panels
- Joints between brick and frames
Quotes for external mastic in Ash Green
Some jobs are bigger than they look, and some smaller. What affects the quote:
- Any mould that needs treating
- Working hours on commercial sites
- The number and length of the joints
- Whether the work is at height
Doing several joints on one visit generally makes better use of the time than several visits, so tell us about everything that needs sealing. You will get one clear quote for the whole job.
What to tell us for a quote
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- A few photos by email, if you can
- Any previous sealing or DIY work
- If it’s domestic, commercial or a hotel
- Where the job is, and your postcode
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 add pictures by email if you can.
What the job involves on each surface
Brickwork movement joints
Brick walls have vertical movement joints to absorb expansion. We reseal them with a low-modulus sealant over backing rod in a colour to suit the brick.
Cladding and façade panels
Where a cladding system has its own specified sealant, we follow it. Send us any details you have about the façade.
Common questions in Ash Green
Do you cover smaller places like Ash Green?
Yes. Ash Green is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Can you do external mastic in Ash Green?
Yes. Our work covers London and the South East, and Ash Green is part of that. You can call 0345 464 0079 or email us and tell us what needs doing.
Should I point up the gap in my brickwork?
No, not if it’s a movement joint. Filling it with mortar defeats its purpose and can lead to cracking. A flexible sealant is the right fill.
Can I add another job to the visit?
Yes. Tell us about everything you’d like done and you will get one quote.
Can landlords and businesses book you?
Yes, often. Several properties can go on one quote.
Can you work on commercial sites?
Yes. We have worked for hotels, offices and other businesses and we’re fully insured.
Do you use backing rod?
The foam is closed-cell backing rod. It stops the sealant going in too deep and bonding to three sides so it can flex with the joint.
Are you insured?
Yes. Mr Mastic is fully insured, with over 20 years’ experience in sealant work.
More services for Ash Green
When to call us in Ash Green
A lot of failed joints come down to preparation: dusty or wet faces, no primer where one was needed, or old sealant left in. The new sealant then lets go long before it should.
Any of these means the joints need attention:
- Water getting into walls through failed joints
- Rigid filler in a joint that should flex
- Cracked joints where brick meets render or frames
- Old sealant gone brittle and cracked
For site and facilities teams at buildings such as Ash Grange Primary School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Before you book anyone
- How much experience the applicator has
- What the quote includes, VAT included or not
- What happens if they find a problem under the old sealant
- Whether they seal over old material or remove it