Hampshire · England
Cliddesden External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Cliddesden and across Hampshire. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Movement joints filled with mortar instead of sealant
- Water getting into walls through failed joints
- Failed seals between different materials
What affects the cost of external mastic
Every job gets its own quote. This is what makes a difference:
- Mould in or behind the old joints
- The size of the job
- The number of rooms or windows
- Working hours on commercial sites
The cost reflects the work involved, not a rough estimate. That is why we ask a few questions first.
What we need to know
Photos help, but a description is a good start. Try to tell us:
- The address or postcode of the job
- The problem you’ve noticed
- Roughly how big the job is
- How we’d reach the joints
Asking for a quote is easy: let us know the job and the location. A few pictures by email make the job easier to understand, and we will take it from there.
External mastic in Cliddesden, done properly
We’re ARBOMaster approved applicators, and each external joint gets a sealant suited to it. Porous or awkward surfaces are primed where the sealant needs it. We work on joints between brick and frames, concrete & block and façade panels, and people most often call us about rigid filler in a joint that should flex and damp patches traced to an open external joint.
Somewhere as small as Cliddesden, homes and farm buildings often face open ground, where walls and rooflines take the weather head on. Joints on those walls need a sealant that moves with the building and stays in place.
Our work is backed for twelve months, in Cliddesden and everywhere else we cover.
- Location
- Cliddesden (RG25)
- Wider area
- Hampshire
- Cover
- A year, on every job
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
How it works
At the end, we look at the finished work together and explain the cure time. The visit itself normally takes a few hours to a few days, depending on the length of joint and the access, depending on the size of the job. In a small place like Cliddesden, 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.
- Old sealant and any debris are cut and raked out.
- The joint faces are cleaned and primed where the sealant needs it.
- 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.
Preparing for the visit
- Tell us about access, such as stairs, a lift or high-level joints
- Tell us about any water getting in
- For indoor joints, keep the area dry beforehand if you can
Ask for a quote
If you’re in Cliddesden 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 we will agree the price before any work begins.
Advice
When to call us in Cliddesden
Joints sealed without backing rod, or far too deep, rarely last. If the sealant sticks to the back as well as the sides, it can’t stretch and rips as the joint opens.
Look out for any of the following:
- Leaking joints around cladding and façade panels
- Moss and dirt in joints with no sealant left
- Joints with sealant missing in places
- Sealant that has lost its bond to the brick or render
In the older streets around Church of St Leonard, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Questions to ask before you book
- What happens if the job turns out different
- What guarantee comes with the work
- When the joint can take water or movement
- How much experience the applicator has
Cliddesden questions
Will you come out to Cliddesden?
Yes, we do. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Is Cliddesden in your area for external mastic?
Yes. We work across London and the South East, and Cliddesden is part of that. Just ring 0345 464 0079 or send us an email with a few details of the job.
Is it OK to fill a movement joint with cement?
No, not where the gap is a movement joint. Filling it with mortar defeats its purpose and can lead to cracking. We’ll reseal it with a flexible sealant.
Do you seal joints where cladding meets other materials?
Yes. The old joint is removed, both surfaces cleaned and primed where needed, and a flexible sealant applied. The colour is chosen to suit.
Do you have insurance?
Yes. Full insurance covers our work, and we can confirm the details when we quote.
Will it make a mess?
Tidy work is part of the job. Nearby surfaces are protected, and we clear up when we’re done.
Can I do it myself?
Sometimes. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
Which products do you use?
The product depends on the job: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. We use products from Arbo and Everbuild.
Landlord and commercial work in Cliddesden
Hotels need rooms back in use, so we plan the work room by room. Hotel work is part of what we do, alongside homes and businesses.
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance.
Towns and villages near Cliddesden
What else we do in Cliddesden
Why deal with it now?
Sealing over the top of old mastic does not hold for long. The new layer cannot bond properly to old, weathered material, so we always take the old sealant out. Around Cliddesden, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
The cost depends on the size of the job, how much old material has to come out and access to the work. We give a clear quote before we start.
Why Cliddesden customers choose us
- Tidy, careful work
- Domestic, commercial and hotel work
- White, clear, grey or coloured to suit, where the product allows
- A 12-month guarantee on all work
Read how sealant jobs are priced and our reviews.
External mastic in Cliddesden: local notes
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. With historic houses such as The Vyne (about 4.8 miles north) nearby, there’s older building stock in the area around Cliddesden as well as newer homes. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth.
If you let a flat or house near Basingstoke station, outside joints that have cracked can let damp into a rental, so check them between lets. Managing a site like Cliddesden Primary School? Then larger buildings have long runs of movement joint that eventually need resealing.
Cliddesden is about 2 miles south of Basingstoke, in Hampshire. Every kind of property in Cliddesden is covered for external mastic, old or new, large or small. The work is guaranteed for a year. Cliddesden is one of 683 towns and villages in Hampshire we cover for external mastic. Our Reading page covers work nearby.
Every address in RG25 is within our area for external mastic, from the main roads to the quietest streets. You’ll find streets such as Station Road, Church Lane and Hoopersmead, and we cover them all. We also cover the places around Cliddesden: Viables (1 mile north), Eastrop (2 miles north), Ellisfield (2 miles south), Oakridge (2 miles north) and Upper Common (2 miles south). Further out, we also cover Farnborough (15 miles east), Fleet (11 miles east), Aldershot (15 miles east), Alton (8 miles south-east), Yateley (13 miles north-east) and Tadley (8 miles north).
Around Cliddesden
Locally, jobs take us to homes and businesses close to Brighton Hill Community School, Hackwood Park and Jolly Farmer Public House and the streets around them. For rail, the closest station is Basingstoke station, roughly 2.2 miles north of the centre. Well-known places in the area include Basing House (2.9 miles north-east) and Festival Place (2 miles north). The countryside around Cliddesden includes Farleigh Hill and The Mill Field.
Surface by surface
Render joints
Cracks along render joints let water in behind the coat. A sound joint keeps the render dry behind and helps it last.
Cladding and façade panels
Cladding and façade panels are generally separated by sealed joints. We reseal them with a sealant suited to the panel material.
Looking after it afterwards
No joint lasts for ever, but care makes a real difference. A few tips:
- Point out the joints to other trades
- Get split or bare joints resealed while the damage is small
- Keep water from gutters off the wall
- Check the sealant is paintable before painting near it
Follow the cure time we give you before the joint is knocked or disturbed. Most exterior sealants skin fast but take longer to cure right through.
If you can see gaps, plants or bare sections in a joint, have it checked. Earlier resealing means a smaller job and a better result.