Hampshire · England
Perham Down External Mastic
Sealing brickwork movement joints, render, cladding and façade joints in Perham Down, with a one-year guarantee on every job. Call for a quick quote.
- Joints pointed up with cement by mistake
- Hard, crazed mastic that has stopped moving
- Cracked joints where brick meets render or frames
How the job changes by surface
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.
Brickwork movement joints
Vertical joints in long brick walls let the brickwork expand without cracking. We reseal them with a low-modulus sealant over backing rod coloured to suit the wall.
External mastic in Perham Down
Where two different materials meet, such as brick and render or blockwork and metal, they move at different rates. A flexible sealant bridges the two. If you have rain getting behind render or cladding at a joint and movement joints with cracked, split or missing sealant, we can put it right.
In a village or hamlet like Perham Down, 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.
There’s a 12-month guarantee on every job.
- Place
- Perham Down (SP11)
- Region
- Hampshire
- Guarantee
- 12 months on all our work
- Price
- A clear price before work begins
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Towns and villages near Perham Down
Also in Perham Down
What we can’t put right
It helps to know what we can’t do too:
- Walls that need new movement joints cut into them
- Cracks in the bricks or render themselves, away from the joints
- Damp that is not coming from the joint
If in doubt, call 0345 464 0079 or email us and we’ll say what we think before booking.
Joints and surfaces we work on
- Concrete & block
- Render & cladding joints
- Façade panels
- Copings & trims
- Brickwork movement joints
- Joints between brick and frames
What external mastic looks like in Perham Down
London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Rented homes near Grateley station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies. If you look after a building such as The Wellington Academy, its movement joints, gutters and trims need looking after like any other building’s. For an older house near a landmark such as Church of St James, an extension built onto an older house moves differently, and the joint between them takes the strain.
Perham Down is about 7 miles west of Andover, in Hampshire. If you need external mastic in Perham Down, it’s easy to get a quote: please call 0345 464 0079 or email us. We cover Hampshire from our Crawley base, Perham Down included. Across Hampshire, we cover 683 places, and Perham Down is one of them. For nearby work, see our Southampton page, about 25 miles away.
Every address in SP11 is covered for external mastic. Streets in the area include Perth Road, Somme Road and Upnor Close, all of which we cover. Other places close to Perham Down include Great Shoddesden (1 mile east), Ludgershall (1 mile north), Tidworth (1 mile west), Kimpton (2 miles south-east) and Shipton Bellinger (3 miles south-west). Further out, we also cover Andover (7 miles east), Whitchurch (13 miles east), East Anton (7 miles east), Picket Piece (8 miles east), Picket Twenty (8 miles east) and Finkley Down (8 miles east).
What’s near Perham Down
The nearest railway station is Grateley station, roughly 4.9 miles south of the centre. Well-known places in the area include Ludgershall Castle (1.3 miles north). Open spaces near Perham Down include Quarley Hill.
Perham Down questions
Is Perham Down in your area for external mastic?
Yes, Perham Down is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or drop us an email and let us know what needs doing, and we will send you a clear quote.
Can you help a landlord with a rental near Grateley station?
Yes, we work for landlords and letting agents. Just phone 0345 464 0079 or send us an email and tell us about the property, and we’ll send you a clear quote.
Is it worth trying it myself?
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.
Do the sealants smell?
Some sealants have a smell while they cure, which fades as it sets. Ventilation helps.
How long does external mastic take?
It depends on the size of the job, but as a guide it takes anything from a few hours to several days, depending on the building. We’ll tell you when we quote.
Where is Mr Mastic based?
We work from Crawley. We cover Perham Down and the rest of Hampshire, along with the rest of our area.
Can I add another job to the visit?
Of course. Doing several areas at once is generally more efficient.
Are you an approved applicator?
Yes. We’re approved under the ARBOMaster scheme, the approved applicator scheme for Arbo sealants.
What happens on the day
There’s no need to move everything out before we come, just the space around the work. Everything nearby is protected, and the work takes a few hours for a handful of joints, longer for a whole elevation for a typical job. Somewhere as small as Perham Down, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Backing rod goes in so the sealant can stretch between the two faces.
- We prime the faces where required.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Preparing for the visit
- Let us know about earlier repairs to the joints
- Mention any sign-in or site rules at work premises
- Tell us about access, such as stairs, a lift or high-level joints
Getting a quote
Need a quote? Please ring 0345 464 0079 or email us with a few details. We will explain what we’d do and send you a clear quote before we start.
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Why act early in Perham Down
A properly done movement joint is an even line in a colour that suits the wall. A rushed bead with no backing looks untidy and doesn’t last so it’s worth doing right. Around Perham Down, older homes often have timber in their 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’s why we ask about the job first and agree the price before starting.
Why book with us
- Experience in homes, commercial sites and hotels
- Tidy, careful work
- A sealant colour to suit the surroundings
- 20+ years of sealant experience
See what affects the cost and customer reviews.
How we quote for external mastic
The quote reflects the job in front of us. We take into account:
- Mould in or behind the old joints
- The number of rooms or windows
- How much old sealant there is and how hard it is to remove
- The type of sealant required
Combining jobs into one visit is normally more efficient than separate visits. We will send you a clear quote for the lot.
What to tell us for a quote
To make quoting easier, please include:
- Photos by email, if that is easy
- What’s wrong with the joints now
- The address or postcode of the job
- Access, such as stairs, a lift or height
Getting a quote is simple: let us know the job and the location. A few pictures by email make the job easier to understand.
How to look after the new joints
Once the sealant has cured, a few habits help it last:
- Walk round the building once a year and look at the joints
- Have failed joints looked at early
- Don’t let climbing plants root in the sealant
- Make sure movement joints are not pointed over
Look over the joints once a year, ideally after winter. Watch for splits, edges coming away or growth in the joint.
Once a joint can’t move, the wall finds another way, often as cracks near the joint. Catch it early and you reduce the risk.
Landlords, agents and businesses in Perham Down
Whether it’s one flat or a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a one-year guarantee.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance that we can handle for you.