Hampshire · England
External Mastic in Wildhern
Sealing brickwork movement joints, render, cladding and façade joints in Wildhern, with a 12-month guarantee on every job. Ask us for a quote.
- Joints where the bead has come unstuck
- Joints with sealant missing in places
- Joints pointed up with cement by mistake
External mastic in Wildhern, done properly
We are ARBOMaster approved applicators, and each external joint gets a sealant suited to it. Porous or awkward surfaces are primed where the sealant needs it. Common call-outs are for failed sealant between panels on a façade and weeds or debris growing in open joints, across concrete & block, brickwork movement joints and copings & trims.
Older homes in small places like Wildhern may be stone, brick or timber-framed, often with later extensions. Where one material meets another is where water normally gets in, and they need the right sealant at the right depth.
We stand behind the work with a 12-month guarantee.
- Place
- Wildhern (SP11)
- Wider area
- Hampshire
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
DIY versus a professional finish
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it does not work out, we can still put it right.
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
Places near Wildhern
What else we do in Wildhern
The process
Once we are on site, we compare the joints with what we discussed. If anything is different, we explain it before carrying on. Most jobs then take anything from a few hours to several days, depending on the building. Somewhere like Wildhern needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- Each joint is checked and the colour of the new sealant agreed.
- Failed sealant is removed back to clean, sound faces.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
How to prepare
- Where the joints are inside, avoid wetting them before we arrive
- Tell us if parking is tricky
- Tell us about any previous sealing or DIY attempts
Getting a quote
We quote each job on its own, so the first step is telling us about yours. Just call 0345 464 0079 or email us with the details and send photos if you have them.
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FAQs for Wildhern
Can you do external mastic in Wildhern?
Yes. We work across London and the South East, and Wildhern is part of that. Just phone 0345 464 0079 or drop us an email with a few details of the job, and we’ll send you a clear quote.
Will you come out to Wildhern?
Yes, Wildhern is covered. We work across London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
What is a movement joint?
A movement joint is a planned break in the wall that absorbs expansion and shrinkage. It’s sealed with a flexible sealant, not mortar.
Do you work for hotels and businesses?
Yes. Commercial and hotel work is a large part of what we do, as well as homes. Working times can be discussed when we quote.
Can you seal joints between two different materials?
Yes. The old joint is removed, both surfaces cleaned and primed where needed, and a flexible sealant applied. We pick a colour that works with both materials.
Should I point up the gap in my brickwork?
No. A mortar-filled joint can’t move, so the movement cracks the wall elsewhere. Use a flexible sealant with backing rod.
Can you do several jobs on one visit?
Yes, we can. Several rooms, windows or areas can go on one quote.
Will there be a smell?
Some sealants have a smell while they cure, which fades as it sets. Ventilation helps.
What sealant work cannot fix
In fairness, there are a few things sealant won’t fix:
- Cracked brickwork or render that needs a builder or plasterer
- Structural movement, which needs a surveyor or engineer
- Adding movement joints to masonry that has none
If in doubt, call 0345 464 0079 or send us an email and we’ll say what we think before you book.
Surfaces we seal
- Copings & trims
- Brickwork movement joints
- Façade panels
- Joints between brick and frames
- Render & cladding joints
- Concrete & block
Surface by surface
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.
Joints between dissimilar materials
Wherever two materials meet, they move differently. A flexible sealant bridges the two.
When to call us in Wildhern
Joints sealed without backing rod, or far too deep, rarely last. Sealant bonded to three sides has nowhere to go and rips as the joint opens.
People normally contact us when they notice one of these:
- Joints with sealant missing in places
- Moss and dirt in joints with no sealant left
- Sealant that has lost its bond to the brick or render
- Failed sealant between panels on a façade
For landlords with property near Andover station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
What your quote should include
- Is the old sealant removed completely?
- Whether the sealant suits the joint
- What the quote includes, VAT included or not
- What happens if the job turns out different
Leave it or put it right?
A failed movement joint lets water into the wall, behind render and cladding. Resealing early keeps the job to the joint itself, instead of the wall and finishes around it. Older cottages and farmhouses around Wildhern can have timber floors and frames, and water through a failed joint can rot timber 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.
Why Wildhern clients choose us
- Domestic, commercial and hotel work
- Anti-fungal silicone where joints get wet
- Approved under the ARBOMaster scheme
- Old sealant always removed completely
See what affects the cost and our reviews.
Keeping the joints in good condition
Good habits help new joints last longer. A few tips:
- Ask before painting over external sealant
- Keep soil, plants and ivy away from the joints
- Check external joints each spring
- Fix overflowing gutters above sealed joints
Keep the joints clear of soil, plants and climbing growth. Damp material against the sealant shortens its life.
Water getting behind cladding or render can go unnoticed for a long time. When it finally shows inside, the joint may have been open for years so early resealing is worth it.
Outside joints around Wildhern
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For an older house near a landmark such as Christchurch, an extension built onto an older house moves differently, and the joint between them takes the strain. If you look after a building such as Hatherden Church of England Primary School, its movement joints, gutters and trims need looking after like any other building’s.
Wildhern is about 3 miles north of Andover, in Hampshire. Wherever you are in the SP11 postcode area, we can carry out external mastic at your property. 683 places in Hampshire are on our list, from the larger towns to small villages. Our Southampton page covers work nearby, about 24 miles away.
Work in SP11 works the same way as everywhere else we cover. We also cover Upper Enham (1 mile south-east), Enham Alamein (1 mile south-east), Little London (2 miles east), Knights Enham (2 miles south-east) and Smannell (2 miles south-east). Larger places within reach include Andover (3 miles south), Hyde (15 miles south-east), Tidworth (7 miles west), Weeke (15 miles south-east), Kempshott (15 miles east) and Ludgershall (5 miles west).
What’s near Wildhern
We work in homes and buildings around The Hare & Hounds pub, among other places. The closest station to Wildhern is Andover station, about 3.1 miles south. A little further out are Finkley Down Farm Museum (3.1 miles south-east) and Andover War Memorial Hospital (2.8 miles south). Green spaces nearby include Anton Lakes and Mill Lake.