Hampshire · England
Redenham External Mastic
External mastic for Redenham and the surrounding area: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Movement joints with cracked, split or missing sealant
- Sealant that has lost its bond to the brick or render
- Joints pointed up with cement by mistake
How we handle external mastic in Redenham
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, leaving it bonded to two faces so it can move with the wall. If you have movement joints with cracked, split or missing sealant and panel joints letting water in, we can put it right, on copings & trims, render & cladding joints and concrete & block alike.
External sealant needs dry, clean surfaces, so work around Redenham is planned for dry weather. Tell us about access to all sides of the building, including outbuildings and garages.
We stand behind the work with a one-year guarantee.
- Place
- Redenham (SP11)
- Wider area
- Hampshire
- Guarantee
- 12 months on all our work
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Leave it or put it right?
A failed movement joint lets water into the wall and can run behind render or cladding. Dealing with it early keeps the repair to the joint, instead of the wall and finishes around it. Around Redenham, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
There are no prices on our website, because the cost depends so much on the job itself. For a quick quote, please call 0345 464 0079 or send us an email and we will talk you through it.
What you get with us
- A choice of colours where the product allows
- Domestic, commercial and hotel work
- Quality sealants from Arbo and Everbuild
- Any old sealant cut out fully, not covered over
What we do, step by step
Good joint work is mostly preparation, so that is where we spend the time. Every joint is cleaned and dried before new material goes in. All told, the work takes anything from a few hours to several days, depending on the building. For a village or hamlet like Redenham, the journey is planned in advance: 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.
- We start by checking each joint, agreeing the ones to redo and how we’ll reach them.
- The old mastic and anything lodged in the joint is removed.
- The joint faces are cleaned and primed where the sealant needs it.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
Before we arrive
- Tell us if parking is tricky
- Tell us about access, such as stairs, a lift or high-level joints
- Try not to wet indoor joints just before the visit
Ask for a quote
Getting a quote is simple: let us know what needs doing and where. A few photos by email make the job easier to understand.
Related advice
Signs you need external mastic in Redenham
Poor preparation causes many early failures: 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.
Look out for any of the following:
- Joints with sealant missing in places
- Sealant pulling away from one side of the joint
- Weeds or debris growing in open joints
- Hard, crazed mastic that has stopped moving
Schools such as Appleshaw St Peter's CofE Primary School are buildings too, and larger buildings have long runs of movement joint that eventually need resealing.
Questions to ask before booking
- What happens if they find a problem under the old sealant
- Whether they’re fully insured
- Is VAT in the price?
- How long the guarantee is
Towns and villages near Redenham
Other services in Redenham
When it isn’t the sealant
A few problems are outside what sealant work can do:
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Cracking across the wall rather than at a joint
- Movement that’s more than a sealant joint can take
If in doubt, call 0345 464 0079 or drop us an email and we’ll say what we think.
Where we work in Redenham
- Joints between brick and frames
- Brickwork movement joints
- Concrete & block
- Copings & trims
- Façade panels
- Render & cladding joints
Keeping the joints in good condition
No joint lasts for ever, but care makes a real difference. A few tips:
- Clear growth from the base of walls and joints
- Fix overflowing gutters above sealed joints
- Act on the first splits you see
- Point out the joints to other trades
Do not let soil, plants or ivy build up against the new joints. Anything that holds water against the joint wears it out sooner.
Water getting behind cladding or render can go unnoticed for a long time. By the time there’s a damp patch, the damage can be well established.
Quotes for external mastic in Redenham
We don’t publish a price list. What we look at:
- The type of sealant required
- Access and height
- How many rooms, windows or areas are involved
- Working hours on commercial sites
Rather than a set price list, we price the job in front of us: how many joints, what’s in them now and how we reach them. You will know the price before we begin.
What we need to know
Photos by email are helpful but not essential. Try to tell us:
- How many joints, rooms or windows are involved
- Whether it has been sealed before
- What’s wrong with the joints now
- Whether it’s a home or a business
If you’re in Redenham and need external mastic, call 0345 464 0079 or email us. Tell us what the problem is and where, and we will agree the price before any work begins.
For landlords and businesses
If you manage several properties in or around Redenham, jobs at different addresses can go on one quote. Send us the addresses and the work at each, and pictures by email help.
Housing providers, facilities teams and property managers book us too in Redenham and across Hampshire. Several sites can go on one quote.
What external mastic looks like in Redenham
Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Letting a property close to Andover station? Then outside joints that have cracked can let damp into a rental, so check them between lets. If you live in an older home near Church of St Peter in the Wood, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Redenham is about 4 miles north-west of Andover, in Hampshire. Whether you’re in the middle of Redenham or further out, we cover external mastic for every kind of property, from flats and houses to offices and hotels. Our Hampshire coverage runs to 683 places, Redenham among them. Our Southampton page covers work nearby.
Every address in SP11 is covered for external mastic, from the main roads to the quietest streets. Neighbouring places we cover for external mastic include Appleshaw (1 mile south-east), Faberstown (1 mile west), Clanville (1 mile east), Chute Forest (2 miles north) and Fyfield (2 miles south). We also work in nearby towns such as Andover (4 miles south-east), Tidworth (4 miles west), Whitchurch (10 miles east), East Anton (5 miles east), Harestock (15 miles south-east) and Overton (13 miles east).
Local landmarks in Redenham
In Redenham, that means homes and buildings near Walnut Tree Inn. The closest station to Redenham is Andover station, about 4 miles south-east. Nearby you will also find Ludgershall Castle (2.6 miles north-west) and Andover War Memorial Hospital (3.8 miles south-east). For a walk, there’s Quarley Hill and Anton Lakes.
Questions from Redenham
Do you cover smaller places like Redenham?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Can you help a landlord with a rental near Andover station?
Yes. We work for letting agents and landlords as well as homeowners. You can call 0345 464 0079 or drop us an email with the details for a clear quote.
Can you seal joints between two different materials?
Yes. Different materials move at different rates, so a flexible sealant is needed where they meet. The sealant is matched to both sides.
Do you hold any approvals?
Yes. We are approved under the ARBOMaster scheme.
Can I do it myself?
It depends on the job. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.
Where is Mr Mastic based?
Our base is Crawley, with over 20 years’ experience. Our area covers South East England, London and Scotland.
Do you have insurance?
Yes. We’re fully insured.
Do you do commercial work?
Yes, regularly. We can plan bigger jobs in stages.