Hampshire · England
External Mastic in Southington
External mastic in Southington from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Sealant that has lost its bond to the brick or render
- Leaking joints around cladding and façade panels
- Hard, crazed mastic that has stopped moving
Looking after it afterwards
Looking after new joints is easy, and it makes a real difference:
- Act on the first splits you see
- Look over the joints every year, ideally after winter
- Do not let climbing plants root in the sealant
- Leave the joints unpainted unless we’ve said otherwise
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.
External mastic for homes and businesses in Southington
Joints in render and cladding are easy to overlook until a damp patch appears. We look over the joints, agree the ones to renew and reseal with a flexible, weatherproof product. If you’re dealing with joints where the bead has come unstuck and plants rooting in failed movement joints, we can help, on façade panels, brickwork movement joints and concrete & block alike.
Outside joints can only be sealed when they’re dry, so work in Southington is booked around the forecast. Let us know about access to every wall, plus any garages or outbuildings.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Location
- Southington (RG25)
- Region
- Hampshire
- Guarantee
- One year on every job
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Outside joints around Southington
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For an older house near a landmark such as Church of St Mary, the joints between older walls, newer extensions and the roofline need a sealant that can move. Managing a site like Overton Church of England Primary School? Then its movement joints, gutters and trims need looking after like any other building’s.
Southington is about 8 miles west of Basingstoke, in Hampshire. If you need external mastic in Southington, it’s easy to get a quote: please ring 0345 464 0079 or send us an email. We’re based in Crawley and cover Hampshire. Southington is one of 683 places in Hampshire we cover. Our Reading page covers work nearby.
Work in RG25 is quoted and booked the same way as anywhere else. You’ll find streets such as Vinns Lane, London Road and Dellands Lane. Close by, we work in Overton (1 mile east), Quidhampton (1 mile north-east), Laverstoke (1 mile south-west), Freefolk (1 mile west) and Wells-in-the-Field (2 miles west). Further out, we also cover Basingstoke (8 miles east), Winchester (13 miles south), Andover (9 miles west), Alton (14 miles south-east), Tadley (10 miles north-east) and Hook (14 miles east).
Landmarks near Southington
Around Southington, our work takes us to homes and buildings near The Greyhound pub and the streets around them. Southington’s nearest station is Overton station, about 1.1 miles north-east of the centre. Green spaces nearby include Ladle Hill.
How the visit works
Good joint work is mostly preparation, and we don’t rush it. Joints are cleaned back and dried before anything new goes in. In total, it generally takes anything from a few hours to several days, depending on the building. Somewhere like Southington needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- First, the joints are inspected and the access agreed.
- We cut out the old mastic and rake out anything in the joint.
- Joint faces are cleaned back and primed if the sealant needs it.
- We fit closed-cell backing rod to control the depth.
- We apply the sealant, tool it and check the whole run.
How to prepare
- Move anything stored near the joints
- Tell us about access, such as stairs, a lift or high-level joints
- Where the joints are inside, avoid wetting them before we arrive
Get a quote
Need a quote? Please call 0345 464 0079 or drop us an email and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
Advice
Why act early in Southington
An open joint keeps letting water into the wall with every downpour. Wet masonry is more easily damaged by frost, so the problem grows beyond the joint itself. Where a wall is exposed, as many are in small places like Southington, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Instead of a standard rate, 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.
Why book with us
- More than 20 years in sealant work
- Old sealant always removed completely
- We are fully insured
- Every job guaranteed for a year
Read how sealant jobs are priced or our reviews.
Also near Southington
Also in Southington
DIY sealant or a professional job?
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly, so just mention it when you contact us.
When something else is needed
We’d rather tell you now than do work that won’t last, so here’s what sealant can’t put right:
- Render that is blown, hollow or coming away
- Subsidence or other structural problems
- Rising or penetrating damp from elsewhere in the wall
If you’re not sure, just call 0345 464 0079 or send us an email and we’ll give you a straight answer.
Where we work in Southington
- Concrete & block
- Copings & trims
- Render & cladding joints
- Brickwork movement joints
- Façade panels
- Joints between brick and frames
Do you need external mastic in Southington?
The wrong product in a moving joint is a classic cause. A high-modulus or general-purpose sealant can be too rigid for a busy joint, so it pulls away from the edges.
Look out for any of the following:
- Old sealant gone brittle and cracked
- Leaking joints around cladding and façade panels
- Joints with sealant missing in places
- Rigid filler in a joint that should flex
For landlords with property near Overton station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Comparing quotes
- Whether they’re fully insured
- Which sealant they’ll use, and why
- Whether you can choose the colour
- How long to leave it before use
Surface by surface
Copings and trims
Coping joints that leak let water straight down into the wall. Sealing them early saves the wall below.
Concrete and blockwork
The face of concrete or block is often dusty, so preparation is key. A primer goes on where the product requires one before sealing.
Your questions about external mastic in Southington
Can you help a landlord with a rental near Overton station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. Just ring 0345 464 0079 or email us with the address and what needs doing, and we’ll send you a clear quote.
Is Southington in your area for external mastic?
Yes, Southington is within the area we cover. We work across London and the South East. Just call 0345 464 0079 or send us an email with a few details of the job, and we will give you a clear quote.
Is it OK to fill a movement joint with cement?
No. A mortar-filled joint cannot move, so the movement cracks the wall elsewhere. Use a flexible sealant with backing rod.
Why do you put foam in the joint first?
Backing rod goes into deeper joints as a matter of course. It controls the depth and stops the sealant bonding to the back so the bead can stretch.
Do you remove the old sealant?
Yes. Sealing over old sealant is the main reason resealing fails early, and it’s something we never do.
Can you quote for more than one area?
Yes. Several rooms, windows or areas can go on one quote.
How much does external mastic cost in Southington?
Every job is different, so each one gets its own quote. For a quick quote, call 0345 464 0079 or send us an email and tell us what needs doing and where.
Do the sealants smell?
There can be a smell while the sealant cures. Opening a window helps.