Kent · England
External Mastic in Mountain Street
Sealing brickwork movement joints, render, cladding and façade joints for Mountain Street, backed by a 12-month guarantee. Call for a quick quote.
- Movement joints with cracked, split or missing sealant
- Failed sealant between panels on a façade
- Gaps where render, brick and frames meet
External mastic in Mountain Street, done properly
On houses, flats and commercial buildings across Mountain Street, we reseal joints in brickwork, render, cladding and façade panels. Every joint gets the same careful preparation: clean, sound faces and a controlled depth. Typical jobs include hard, crazed mastic that has stopped moving and sealant that has lost its bond to the brick or render, on joints between brick and frames, brickwork movement joints and copings & trims.
Somewhere as small as Mountain Street, homes and farm buildings often face open ground, so walls and rooflines take the full force of wind and rain. Joints on those walls need a sealant that moves with the building and stays in place.
Your job is guaranteed for a year, as with all our work.
- Location
- Mountain Street (CT4)
- Region
- Kent
- Cover
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
What we’re called out for in Mountain Street
Many joints fail because they were sealed too deep or with nothing behind them. If the sealant sticks to the back as well as the sides, it can’t stretch and tears as soon as the joint widens.
If you can see any of these, it’s time to have the joints looked at:
- Cracked joints where brick meets render or frames
- Movement joints filled with mortar instead of sealant
- Moss and dirt in joints with no sealant left
- Sealant that has lost its bond to the brick or render
If you let a flat or house near Chilham station, split movement joints are easy to miss on a rental until damp shows inside.
What your quote should include
- What product goes in the joint
- Whether VAT is included
- Who turns up on the day
- Whether all the old sealant comes out first
Mountain Street questions
I let a flat near Chilham station. Can you help?
Yes. We work for letting agents and landlords as well as homeowners. Just phone 0345 464 0079 or drop us an email with the address and what needs doing, and we will give you a clear price.
Do you cover Mountain Street for external mastic?
Yes, Mountain Street is within the area we cover. We work across London and the South East. Just ring 0345 464 0079 or send us an email with a few details of the job, and we’ll give you a clear price.
Can I do it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. Most DIY failures come from sealing over old material, wet joints or too much sealant.
Do you remove the old sealant?
Yes, always, and completely. New silicone does not stick to old silicone, so any old material comes out before anything new goes in.
When is the sealant fully cured?
Different products cure at different speeds, so please follow the time we give you.
Where is Mr Mastic based?
Our base is in Crawley, and we cover South East England, London and all of Scotland.
Is it OK to fill a movement joint with cement?
No. Cement or mortar can’t stretch. If it has already been filled, we can usually cut it out and reseal it.
What should I tell you?
A short description and the location, plus pictures if you have them. If we need more, we’ll ask.
Outside joints around Mountain Street
The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
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.
Mountain Street is about 6 miles south-west of Canterbury, in Kent. Across the CT4 area, we cover external mastic for homes and businesses. We cover 922 towns and villages across Kent. For nearby work, see our Chelmsford page, about 40 miles away.
We cover every part of CT4 for external mastic and the streets around it. Neighbouring places we cover for external mastic include Chilham (1 mile north-east), Godmersham (1 mile south), Old Wives Lees (1 mile north), Shottenden (2 miles north-west) and Bilting (2 miles south). We also work in nearby towns such as Ashford (8 miles south-west), Canterbury (6 miles north-east), Sittingbourne (12 miles north-west), Folkestone (14 miles south-east), Whitstable (9 miles north) and Faversham (6 miles north-west).
What’s near Mountain Street
Around Mountain Street, our work takes us to homes and buildings near Woolpack Inn and Broadham Down. For rail, the closest station is Chilham station, about 0.8 miles north-east of the centre. A little further out are Kent and Canterbury Hospital (5.7 miles east) and Chilham Castle (less than half a mile north).
Should I try it myself first?
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
How the job changes by surface
Joints between dissimilar materials
Where a frame or panel meets masonry, water often finds a way in. We cut out the old sealant and reseal with a product suited to both surfaces.
Cladding and façade panels
Cladding and façade panels are normally separated by sealed joints. Each joint gets a sealant that suits the panel and its movement.
Places near Mountain Street
More services for Mountain Street
The process
When we get to you, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. Most jobs then take a few hours to a few days, depending on the length of joint and the access. For a village or hamlet like Mountain Street, the journey is planned in advance: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Backing rod goes in so the sealant can stretch between the two faces.
- We prime the faces where required.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Getting ready for the visit
- Mention any parking rules near the property
- On commercial sites, let us know about site rules
- Try not to wet indoor joints just before the visit
Get a quote
Call for a quick quote, or send an email if you’d rather. Tell us about the joints that need doing and we’ll talk you through the work and give you a clear price.
Related advice
What affects the quote in Mountain Street
Call for a quick quote. The main things that affect it are:
- The product the joint needs
- Mould in or behind the old joints
- How much old sealant there is and how hard it is to remove
- When we can work, for business premises
Instead of a standard rate, we price the job in front of us: the amount of work, the old material and the access. You will know the price before we begin.
What to tell us for a quote
There’s no need for technical detail. It helps if you can tell us:
- Photos by email, if that’s easy
- Whether it’s a home or a business
- What the problem is, such as mould, gaps, leaks or cracking
- Roughly how big the job is
Want a quote for external mastic? Please call 0345 464 0079 or send us an email with a few details. You will know what we plan to do, and what it will cost, before any work begins.
Looking after it afterwards
How long the joints last depends on use and care. Here’s what we suggest:
- Never let anyone fill a movement joint with mortar
- Leave the joints unpainted unless we’ve said otherwise
- Point out the joints to other trades
- Don’t let climbing plants root in the sealant
Don’t paint over the new sealant unless we have said the product is paintable. Many exterior sealants are not designed to be painted.
Small splits are the time to act. At that stage it’s a simple cut out and reseal.
Work for landlords, hotels and businesses
Hotels need rooms back in use, so we plan the work room by room around your bookings where we can. We’ve worked in hotels as well as homes and businesses.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.