Hampshire · England
Wherwell Wood External Mastic
Sealing brickwork movement joints, render, cladding and façade joints in Wherwell Wood, with a 12-month guarantee on every job. Call for a quick quote.
- Brick movement joints where the sealant has split
- Gaps where render, brick and frames meet
- Failed sealant between panels on a façade
External mastic for homes and businesses in Wherwell Wood
A movement joint is only as good as its depth. Closed-cell backing rod sets the depth and stops the sealant sticking to the back, so it bonds to the two sides only and can stretch. We work on façade panels, copings & trims and brickwork movement joints, and the jobs we see most are failed seals between different materials and old sealant gone brittle and cracked.
Around Wherwell Wood, 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.
Big or small, you get the same 12-month guarantee in Wherwell Wood and across Hampshire.
- Location
- Wherwell Wood (SP11)
- Wider area
- Hampshire
- Guarantee
- A year, on every job
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
When it isn’t the sealant
Some problems need a builder, plumber or other trade rather than us:
- Adding movement joints to masonry that has none
- Render that’s blown, hollow or coming away
- Structural movement, which needs a surveyor or engineer
Not sure which it is? You can call 0345 464 0079 or send us an email and we will tell you honestly.
Surfaces we seal
- Joints between brick and frames
- Copings & trims
- Concrete & block
- Brickwork movement joints
- Render & cladding joints
- Façade panels
Common problems we fix in Wherwell Wood
Some movement joints have been pointed up with mortar. With the joint locked solid, the movement turns into cracks elsewhere in the wall.
Signs it’s time to call us include:
- Plants rooting in failed movement joints
- Movement joints with cracked, split or missing sealant
- Damp patches traced to an open external joint
- Rigid filler in a joint that should flex
For site and facilities teams at buildings such as Wherwell Primary School, larger buildings have long runs of movement joint that eventually need resealing.
What your quote should include
- What insurance they hold
- What the cure time is
- What product goes in the joint
- How the joint is cleaned and prepared
What happens if it’s left?
The longer a joint stays open, the more water the wall takes in. In cold weather, frost can damage wet brick and render, so the damage spreads beyond the joint. Around Wherwell Wood, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
Instead of a standard rate, we look at what your job involves: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Why book with us
- More than 20 years in sealant work
- Quality sealants from Arbo and Everbuild
- You choose the colour before work begins
- Anti-fungal silicone where joints get wet
See our cost guide or our reviews.
Aftercare tips
No joint lasts for ever, but care makes a real difference. A few tips:
- Point out the joints to other trades
- Clear growth from the base of walls and joints
- Walk round the building once a year and look at the joints
- Make sure movement joints are not pointed over
Make sure anyone working on the wall later knows where the movement joints are. They must stay as flexible joints, never rendered or pointed over.
Gaps, plants or missing sealant in a joint are worth getting looked at. Early work is quicker and leaves a better finish.
How the job changes by surface
Joints between dissimilar materials
Each side of the joint may need its own preparation. Both surfaces are cleaned and primed as the product requires.
Cladding and façade panels
Cladding and façade panels are normally separated by sealed joints. Each joint gets a sealant that suits the panel and its movement.
How the visit works
We keep the work tidy and contained to the joints we are treating. 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. In a small place like Wherwell Wood, access is normally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We start by checking each joint, agreeing the ones to redo and how we will reach them.
- 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.
Getting ready for the visit
- Clear the area around the work
- Mention any leaks or damp you’ve noticed
- Mention if the joints have been sealed before
How to get a quote
There’s no standard price list. Instead, we give you a clear price for your job. To arrange one, phone 0345 464 0079 or send us an email.
Advice
Landlord and commercial work in Wherwell Wood
Housing providers, facilities teams and property managers book us too. Several sites can go on one quote.
If you manage several properties in or around Wherwell Wood, jobs at different addresses can go on one quote. Send us the addresses and the work at each.
External mastic in Wherwell Wood: local notes
The South East is one of 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 live in an older home near Church of St Peter, an extension built onto an older house moves differently, and the joint between them takes the strain. If you let a flat or house near Andover station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Wherwell Wood is about 3 miles south-east of Andover, in Hampshire. We provide external mastic to homes and businesses in Wherwell Wood and nearby, as part of our work across Hampshire. Our Hampshire coverage runs to 683 places, Wherwell Wood among them. We also work in Southampton, about 18 miles from Wherwell Wood.
Work in SP11 is quoted and booked the same way as anywhere else. We also cover the places around Wherwell Wood: Wherwell (1 mile south-east), Goodworth Clatford (1 mile west), Cottonworth (1 mile south), Fullerton (2 miles south) and Chilbolton (2 miles south-east). Further out, we also cover Winchester (10 miles south-east), Eastleigh (15 miles south), Andover (3 miles north-west), Chandler's Ford (13 miles south), Romsey (13 miles south) and Hyde (10 miles south-east).
Local landmarks in Wherwell Wood
Typical jobs here are in homes near White Lion Public House and Winton Community Academy and the streets around them. The closest station to Wherwell Wood is Andover station, roughly 2.9 miles north-west. A little further out are Andover War Memorial Hospital (3.2 miles north-west) and Andover Museum (2.6 miles north). Not far away are Mill Lake and Anton Lakes.
Wherwell Wood questions
Can you help a landlord with a rental near Andover station?
Yes, landlords and agents are among the people we work for. Just ring 0345 464 0079 or email us with the address and what needs doing, and we’ll send you a clear quote.
Is Wherwell Wood within the area you cover?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Is there a guarantee?
Yes, for a year. If there’s a problem with our work in that time, tell us and we will put it right.
What is backing rod for?
Closed-cell backing rod sets the depth of the sealant and stops it sticking to the back of the joint. Then the sealant bonds to two faces and can move.
Where are you based?
Our base is in Crawley, and we work across South East England, London and Scotland.
Do you do commercial work?
Yes. Commercial and hotel work is a large part of what we do. We can talk about working times when we quote.
What information do you need?
Just the basics: the address or postcode, what’s wrong and any access issues. Then call 0345 464 0079 or send us an email.
Can new sealant go over the old?
No, because it fails. The old sealant always comes out first, so the new joint bonds to clean surfaces.