Kent · England
Canterbury External Mastic
External mastic across Canterbury and nearby, with every bit of old sealant taken out first.
- Weeds or debris growing in open joints
- Sealant that has lost its bond to the brick or render
- Hard, crazed mastic that has stopped moving
How we handle external mastic in Canterbury
External mastic is a job where short cuts show quickly. New sealant over old, joints packed with mortar and beads with no backing rarely last long. We take the old material out and do it properly. Common call-outs are for failed sealant between panels on a façade and failed seals between different materials, across façade panels, joints between brick and frames and copings & trims.
A place the size of Canterbury has buildings of every age, from older brick terraces to modern blocks with rendered or clad walls. Newer buildings rely on sealed movement joints, while older ones need their gutters, fascias and trims kept tight.
All our work is covered by a one-year guarantee, wherever you are in Kent.
Landlord and commercial work in Canterbury
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Resealing at the right time is simple maintenance.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. Several properties can be quoted together.
What sealant work can’t fix
In fairness, some problems need a different trade:
- Render that is blown, hollow or coming away
- Damp that isn’t coming from the joint
- Movement that’s more than a sealant joint can take
Not sure which it is? You can call 0345 464 0079 or send us an email and we will tell you honestly.
What we seal
- Brickwork movement joints
- Concrete & block
- Façade panels
- Joints between brick and frames
- Copings & trims
- Render & cladding joints
What happens on the day
There’s no need to move everything out, only the area right around the joints. Everything nearby is protected, and the work takes a few hours for a handful of joints, longer for a whole elevation for a typical job. Commercial jobs in Canterbury can be planned out of hours where a building cannot close, and homes are booked within our usual hours, Monday to Saturday.
- We start by walking round the building and agreeing the joints and the access.
- 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
- Where the joints are inside, avoid wetting them before we arrive
- Tell us about any water getting in
- Tell us about access, such as stairs, a lift or high-level joints
Getting a quote
Quotes start with a quick conversation. Describe the problem, the location and the size of the job. Whenever you are ready, call 0345 464 0079 or drop us an email.
Advice
Aftercare tips
Good habits help new joints last longer. Our tips:
- Act on the first splits you see
- Keep water from gutters off the wall
- Keep movement joints as flexible joints, not mortar
- Wash walls gently around the sealant
If you have more work done on the wall, such as new render, cladding or an opening, show the contractor the movement joints. They should be kept open and resealed, not filled.
Act while the splits are small. At that stage it’s a simple cut out and reseal.
Leave it or put it right?
Low-modulus sealants stretch easily, so they put less strain on the joint edges. That matters on brick, render and concrete, which can be weaker at the face. Too stiff a sealant can pull at the edges and break them. In a large rental market like Canterbury, tired sealant leads to tenant complaints about mould, damp and leaks. Sorting it between tenancies is easier than dealing with it mid-let.
Rather than a set price list, we look at what your job involves: the amount of work, the old material and the access. The price is agreed before we begin.
Why choose Mr Mastic in Canterbury
- Over 20 years’ experience
- White, clear, grey or another colour, product permitting
- One-year guarantee on every job
- Fully insured
Take a look at our cost guide or customer reviews.
Can I do it myself?
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
A DIY attempt does not rule out a professional job. We cut it out and start again.
Places near Canterbury
What else we do in Canterbury
Canterbury questions
Do you work for landlords with property near Canterbury East station?
Yes, landlords and agents are among the people we work for. Just call 0345 464 0079 or drop us an email with the address and what needs doing, and we’ll give you a clear price.
Is Canterbury in your area for external mastic?
Yes, Canterbury is within the area we cover. Our work covers London and the South East. Just call 0345 464 0079 or drop us an email with a few details of the job.
Can you do several jobs on one visit?
Yes. Tell us about everything you’d like done.
How long before the joint can be used?
It depends on the product and the conditions. Before we leave, we’ll tell you the cure time.
How much does external mastic cost in Canterbury?
Every job is different, so each one gets its own quote. To get one, call 0345 464 0079 or drop us an email with a short description of the job.
Where are you based?
Our base is Crawley. We work across South East England, London and Scotland.
Do you hold any approvals?
Yes. We are approved under the ARBOMaster scheme, the approved applicator scheme for Arbo sealants.
Is there any odour?
Sometimes, a little. It fades as the sealant cures, and ventilation helps.
Walls and rooflines in Canterbury
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.
Schools such as St Peter's Methodist Primary School are buildings too, and larger buildings have long runs of movement joint that eventually need resealing. Homes close to Church of St Margaret include some older properties, and older walls, gutters and the joints where extensions meet them need a flexible sealant.
Canterbury is in Kent. We carry out external mastic for householders, landlords and businesses in Canterbury. Our Kent coverage runs to 922 places, Canterbury among them. For nearby work, see our Chelmsford page, about 41 miles away.
We work across the CT1, CT2, CT4 and CT3 postcode area for external mastic. You will find streets such as Long Market, High Street and High Street St Gregorys, all of which we cover. You’ll find Canterbury on the A2 and A28, so it’s easy for us to get to. Neighbouring places we cover for external mastic include Wincheap (1 mile south-west), Harbledown (1 mile west), Hales Place (1 mile north), Thanington (1 mile south-west) and Stuppington (1 mile south). Further out, we also cover Ashford (13 miles south-west), Margate (15 miles north-east), Dover (14 miles south-east), Folkestone (14 miles south), Ramsgate (15 miles east) and Whitstable (6 miles north-west). As one of the bigger places in Kent, Canterbury has every kind of property, from flats to offices.
What’s near Canterbury
Around Canterbury, our work takes us to homes and buildings near Canterbury School of Architecture, Bus Company Island and St Thomas of Canterbury Church. Other local landmarks include The Old Buttermarket pub (less than half a mile south-west) and Barton Court Grammar School (0.5 miles east). There’s a railway station in Canterbury itself: Canterbury East station. A little further out are Whitefriars Shopping Centre (less than half a mile south-west) and Canterbury Roman Museum (under half a mile south). Open spaces near Canterbury include Blean Woods RSPB Reserve.
Common problems we fix in Canterbury
If plants are growing out of a joint, the sealant has usually failed or was never there. Dirt and roots then trap moisture in the joint and speed up the damage.
These are the problems we are asked about most:
- Failed sealant between panels on a façade
- Joints pointed up with cement by mistake
- Moss and dirt in joints with no sealant left
- Failed seals between different materials
Rented homes near Canterbury East station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets.
What your quote should include
- Who does the work, and how experienced they are
- Whether the sealant suits the joint
- Whether they seal over old material or remove it
- What happens if the job turns out different