Kent · England
Rough Common External Mastic
External mastic for Rough Common and the surrounding area: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Movement joints filled with mortar instead of sealant
- Leaking joints around cladding and façade panels
- Old sealant gone brittle and cracked
External mastic for homes and businesses in Rough Common
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 will confirm what access is needed. Typical jobs include water getting into walls through failed joints and failed sealant between panels on a façade, across brickwork movement joints, façade panels and joints between brick and frames.
Around Rough Common, older buildings can be stone, brick or timber-framed, many with extensions added later. The joints where those materials meet are the weak points.
Our work is backed for twelve months.
- Where
- Rough Common (CT2)
- Region
- Kent
- Guarantee
- A year, on every job
- Quotes
- A clear price before work begins
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
What the job involves on each surface
Render joints
Cracks along render joints let water in behind the coat. A sound joint keeps the render dry behind.
Brickwork movement joints
Brick moves with heat and moisture, and grows a little over time. The movement joint takes that up, so its sealant has to stay flexible.
When something else is needed
A few problems are outside what sealant work can do:
- Damp that isn’t coming from the joint
- Render that’s blown, hollow or coming away
- Structural movement, which needs a surveyor or engineer
If you’re not sure, just phone 0345 464 0079 or send us an email and we will give you a straight answer.
Surfaces we seal
- Brickwork movement joints
- Copings & trims
- Concrete & block
- Façade panels
- Joints between brick and frames
- Render & cladding joints
How we quote for external mastic
For a quick quote, just ask. What matters most is:
- The type of sealant required
- The number of rooms or windows
- The number and length of the joints
- Working hours on commercial sites
What it costs depends on how much there is to do, how much old material has to come out and how easy the joints are to reach. We give a clear quote before we start, so you know where you stand.
What we need to know
When you call or email, it’s useful to know:
- The rough size of the job
- How we’d reach the joints
- Where the property is
- If someone has resealed it before
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is. Whenever you are ready, call 0345 464 0079 or email us.
The process
We bring everything the job needs with us, so you do not need to buy or prepare anything. Once we’ve agreed what’s being done, the area is protected and the work begins. Most jobs take a few hours to a few days, depending on the length of joint and the access. In a small place like Rough Common, access is generally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- The old mastic and anything lodged in the joint is removed.
- We clean both faces of the joint and prime them where the product calls for it.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
How to prepare
- Mention any leaks or damp you’ve noticed
- Clear the area around the work
- Keep children and pets away from the work area
Ask for a quote
To get a quote, ring 0345 464 0079 or drop us an email with the location and a short description of the problem. You’ll have a clear quote before work begins.
Read more
Outside joints around Rough Common
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Rented homes near Canterbury West station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets. Homes close to Church of St. Gabriel include some older properties, and an extension built onto an older house moves differently, and the joint between them takes the strain.
Rough Common is about 2 miles north-west of Canterbury, in Kent. Our applicators cover external mastic for homeowners, landlords and businesses in Rough Common and the surrounding area. Rough Common is one of 922 towns and villages in Kent we cover for external mastic. Chelmsford is on our list too, around 39 miles away.
Every address in CT2 is covered for external mastic. We cover properties on Ross Gardens, Firtree Close and Rough Common Road and the roads around them. If you are just outside Rough Common, we cover Harbledown (1 mile south-east), Upper Harbledown (1 mile south-west), Hales Place (1 mile east), Wincheap (2 miles south-east) and Thanington (2 miles south). We also work in nearby towns such as Ashford (13 miles south-west), Dover (15 miles south-east), Sittingbourne (14 miles west), Folkestone (15 miles south), Whitstable (4 miles north) and Faversham (7 miles west).
Near you in Rough Common
We work in homes and buildings around St Edmund's School, The Archbishop's School and The Dog and Bear pub. For rail, the closest station is Canterbury West station, about 1.3 miles south-east of the centre. Well-known places in the area include Eastbridge Hospital of St Thomas the Martyr (1.6 miles south-east) and Canterbury Castle (1.6 miles south-east). For a walk, there’s Blean Woods RSPB Reserve.
Nearby places to Rough Common
What else we do in Rough Common
How to look after the new joints
Looking after new joints is easy, and it makes a real difference:
- Leave the joints unpainted unless we have said otherwise
- Get split or bare joints resealed while the damage is small
- Deal with leaking gutters that soak the joints below
- Keep movement joints as flexible joints, not mortar
Give the sealant the cure time we tell you before anything rubs against it. Most exterior sealants skin fast but take longer to cure right through.
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.
Rough Common: your questions answered
Can you do external mastic in Rough Common?
Yes, Rough Common is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or email us and let us know what needs doing, and we’ll give you a clear price.
I let a flat near Canterbury West station. Can you help?
Yes, we work for letting agents and landlords. Just call 0345 464 0079 or send us an email and tell us about the property, and we’ll send you a clear quote.
When will the joints need doing again?
It varies from wall to wall: joints on exposed walls or with a lot of movement age sooner. Check them each year and reseal when they split or harden. Every job carries our one-year guarantee.
Will the new joint stand out?
The aim is a neat, even joint in a colour that suits the wall. Colour is agreed with you before we begin from the range available.
Will it make a mess?
No. We protect the surfaces around the joints, and we clear up the old sealant and our materials before we leave.
Should I try DIY first?
Sometimes. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
Do you use backing rod?
We fit closed-cell backing rod wherever the joint depth needs controlling. It controls the depth and stops the sealant bonding to the back, so the joint can move.
Can new sealant go over the old?
No. The old sealant always comes out first.
Do you need external mastic in Rough Common?
Using the wrong sealant is another common reason. A stiff, general-purpose sealant cannot cope with a joint that moves a lot, so it pulls away from the edges.
Any of these means the joints need attention:
- Joints with sealant missing in places
- Old sealant gone brittle and cracked
- Sealant pulling away from one side of the joint
- Leaking joints around cladding and façade panels
For site and facilities teams at buildings such as Blean Primary School, its movement joints, gutters and trims need looking after like any other building’s.
What to look for in a quote
- Which sealant they’ll use, and why
- What happens if they find a problem under the old sealant
- When the joint can take water or movement
- What preparation is included
Should I try it myself first?
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. All the old material has to come out first.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.