Hampshire · England
External Mastic in Old Basing
Sealing brickwork movement joints, render, cladding and façade joints for Old Basing, backed by a 12-month guarantee. Ask us for a quote.
- Sealant that has lost its bond to the brick or render
- Movement joints filled with mortar instead of sealant
- Cracked joints where brick meets render or frames
DIY sealant or a professional job?
If you are set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it doesn’t work out, we can still put it right.
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
External mastic in Old Basing, done properly
Low-level joints can normally be done from the ground. Where joints are higher up, tell us about the building when you get in touch and we’ll confirm what’s needed to reach them safely. If you have rain getting behind render or cladding at a joint and cracked joints where brick meets render or frames, we can help, on brickwork movement joints, joints between brick and frames and concrete & block alike.
In a smaller place like Old Basing, some homes face open ground, so exposed walls and rooflines take more wind-driven rain. That is where gutter joints and wall joints tend to fail first.
Our work is backed for twelve months, in Old Basing and everywhere else we cover.
- Where
- Old Basing (RG24)
- Region
- Hampshire
- Cover
- 12 months on all our work
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
How the visit works
There’s no need to move everything out before we come, just the space around the work. We protect the rest, and the work takes a few hours for a handful of joints, longer for a whole elevation for a typical job. Parking around Old Basing is generally easier than in a town centre, but mention any lanes, gates or long drives. If the job is outside, tell us about side access and how high the joints are.
- Each joint is checked and the colour of the new sealant agreed.
- We take out the old sealant until the faces are sound.
- 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.
Before we arrive
- Where the joints are inside, avoid wetting them before we arrive
- Mention if the joints have been sealed before
- Tell us if parking is tricky
Ask for a quote
To get a quote, ring 0345 464 0079 or email us and tell us where the job is and what the problem looks like. You will have a clear quote before any work starts.
Read more
Keeping the joints in good condition
How long the joints last depends on use and care. Here’s what we suggest:
- Show decorators and builders where the movement joints are
- Clear growth from the base of walls and joints
- Walk round the building once a year and look at the joints
- Act on the first splits you see
Keep pressure washers away from the sealant. High-pressure water can lift the edges over time.
Gaps, plants or missing sealant in a joint are worth getting looked at. Early work is quicker and leaves a better finish.
Different surfaces, different methods
Concrete and blockwork
Blockwork and concrete shrink over time and move with the seasons. Their movement joints are sealed over backing rod with a flexible sealant.
Render joints
The face of render can be soft, so a low-modulus sealant is kinder to the joint edges. We prime where the product needs it.
Why deal with it now?
It often makes sense to reseal all the failing joints on an elevation together. They’ve weathered the same way and it means sorting access once. In an older home around Old Basing, damp from a failed joint can get into timber and plaster, and that is a much bigger job than renewing the sealant.
Homes and businesses are quoted the same way: how much there is to do, how we reach it and what it needs, along with when we can work on site. Call for a quick quote and we’ll explain what it covers.
What you get with us
- We are fully insured
- White, clear, grey or another colour, product permitting
- Quality sealants from Arbo and Everbuild
- Old sealant always removed completely
Read what affects the cost and what customers say.
For landlords and businesses
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. We can quote for more than one property at once.
Hotels need rooms back in use, so the work can be planned room by room. Hotel work is part of what we do, alongside homes and businesses.
Old Basing: your questions answered
Can you do external mastic in Old Basing?
Yes. Our work covers London and the South East, and Old Basing is part of that. You can phone 0345 464 0079 or email us and let us know what needs doing, and we’ll give you a clear quote.
Is Old Basing within the area you cover?
Yes. Old Basing is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Do the sealants smell?
Some sealants have a smell while they cure. Ventilation helps.
Can tenants book the work?
Yes. Ask your landlord first, and we can send them the quote if that helps.
Do you seal joints where cladding meets other materials?
Yes. Where different materials meet is one of the most common joints we seal. The sealant is chosen to bond to both sides.
How long does external mastic last?
It varies from wall to wall: sunny, exposed elevations and busy joints wear faster. Check them each year and reseal when they split or harden. Our work comes with a one-year guarantee.
What information do you need?
A short description and the location, with pictures by email if possible. If we need more, we’ll ask.
Do you use backing rod?
Backing rod controls the sealant depth and keeps it off the back of the joint. Then the sealant bonds to two faces and can move.
What external mastic looks like in Old Basing
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. Historic houses like The Vyne (about 3.3 miles north-west) are a reminder that the area around Old Basing has older buildings as well as new. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth.
If you look after a building such as Old Basing Infant School, larger buildings have long runs of movement joint that eventually need resealing. Homes close to Church of St Mary include some older properties, and old and new materials meet at the roofline and walls, which is where sealant earns its keep. Letting a property close to Basingstoke station? Then failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Old Basing is about 3 miles east of Basingstoke, in Hampshire. We carry out external mastic for homes and businesses in Old Basing, as part of our work across Hampshire. Old Basing is one of 683 towns and villages in Hampshire where we work. We also work in Reading, about 13 miles from Old Basing.
Every address in RG24 is covered for external mastic. Whether your property is on The Street, London Road and Paulet Place or a nearby road, our applicators can take on the job. We also cover Lychpit (1 mile west), Mapledurwell (1 mile east), Andwell (1 mile east), Water End (2 miles east) and Chineham (2 miles north). We also work in nearby towns such as Basingstoke (3 miles west), Farnborough (12 miles east), Fleet (9 miles east), Aldershot (12 miles east), Alton (9 miles south) and Yateley (10 miles north-east).
What’s near Old Basing
We work in homes and buildings around The Costello School, Eastrop Park and The Crown Public House. The closest station to Old Basing is Basingstoke station, roughly 2 miles west. Well-known places in the area include Festival Place (1.9 miles west) and Basing House (under half a mile west). Open spaces near Old Basing include Farleigh Hill and The Mill Field.
Towns and villages near Old Basing
What else we do in Old Basing
What affects the cost of external mastic
The price is agreed before any work begins. It takes into account:
- How much there is to do
- The number of rooms or windows
- Which sealant suits the joint
- Whether the work is at height
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether we need extra access for height. Your quote takes all of that into account.
What we need to know
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- What the problem is, such as mould, gaps, leaks or cracking
- If it’s domestic, commercial or a hotel
- Where the job is, and your postcode
- How many joints, rooms or windows are involved
If you’re in Old Basing and need external mastic, ring 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and you will get a clear quote before any work starts.