Kent · England
Great Stonar External Mastic
External mastic across Great Stonar and nearby, with old sealant always removed completely.
- Old sealant gone brittle and cracked
- Brick movement joints where the sealant has split
- Damp patches traced to an open external joint
External mastic for homes and businesses in Great Stonar
Joints in render and cladding are easy to overlook until a damp patch appears. We inspect them, agree which need doing and reseal with a weatherproof, flexible sealant. Typical jobs include gaps where render, brick and frames meet and weeds or debris growing in open joints, across joints between brick and frames, concrete & block and brickwork movement joints.
Older homes in small places like Great Stonar may be stone, brick or timber-framed, often with later extensions. Where one material meets another is where water normally gets in.
We guarantee the work for a year. If something is not right with it in that time, tell us and we’ll put it right.
- Where
- Great Stonar (CT13)
- Region
- Kent
- Guarantee
- 12 months on all our work
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
What happens on the day
Every visit runs the same way: we look at the joints together, mask and protect the surrounding surfaces, do the work and clear up. It generally takes a few hours to a few days, depending on the length of joint and the access. Somewhere like Great Stonar needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- First we look over the joints with you, agree which to renew and talk through access.
- We cut out the failed sealant and rake out any dirt or growth.
- We clean both faces of the joint and prime them where the product calls for it.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
Preparing for the visit
- Try not to wet indoor joints just before the visit
- Mention any leaks or damp you’ve noticed
- Let us know about earlier repairs to the joints
Get a quote
To get a quote, call 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. You will have a clear quote before work begins.
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Surface by surface
Copings and trims
Coping and trim joints face rain and sun head on. Each is resealed with a weatherproof, flexible sealant.
Brickwork movement joints
Brick moves with heat and moisture, and grows a little over time. The movement joint takes that up, so the sealant in it must stay soft and stretchy.
What sealant work can’t fix
We will not take on work that won’t last, so here’s what sealant can’t put right:
- Cutting new joints into brickwork, which is building work rather than sealant work
- Render that is blown, hollow or coming away
- Rising or penetrating damp from elsewhere in the wall
If in doubt, call 0345 464 0079 or email us and we’ll say what we think before you book.
Where we work in Great Stonar
- Copings & trims
- Concrete & block
- Façade panels
- Render & cladding joints
- Brickwork movement joints
- Joints between brick and frames
How we quote for external mastic
The quote reflects the job in front of us. We look at:
- The product the joint needs
- How many areas need sealing
- Any working-time requirements on site
- Whether the work is at height
A failed joint rarely gets cheaper to fix by waiting. If you’re not sure whether it needs doing, call 0345 464 0079 or email us for an honest opinion and a quote.
Asking for a quote
There’s no need for technical detail. It helps if you can tell us:
- What’s wrong with the joints now
- Access, such as stairs, a lift or height
- The address or postcode of the job
- Roughly how big the job is
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is. When it suits you, phone 0345 464 0079 or drop us an email.
What external mastic looks like in Great Stonar
Great Stonar is within about 2 miles of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. Both are hard on movement joints and outside wall joints, which can dry out and crack sooner where a building faces the weather. 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.
Schools such as Sandwich Infant School are buildings too, and larger buildings have long runs of movement joint that eventually need resealing. Letting a property close to Sandwich station? Then split movement joints are easy to miss on a rental until damp shows inside. Homes close to St Mary's Church include some older properties, and an extension built onto an older house moves differently, and the joint between them takes the strain.
Great Stonar is about 5 miles south-west of Ramsgate, in Kent. We carry out external mastic for homeowners, landlords and businesses in Great Stonar and nearby, as part of our work across Kent. We cover 922 towns and villages across Kent, large and small. You can also see our page for Chelmsford, roughly 48 miles from Great Stonar.
Work in CT13 is quoted and booked the same way as anywhere else. Streets in the area include Kitchener Drive, Spitfire Way and Hugin Lane, and we cover them all. We also cover the places around Great Stonar: Sandwich (1 mile south), Cooper Street (2 miles west), East Street (2 miles west), Marshborough (2 miles south-west) and Woodnesborough (2 miles south-west). Larger places within reach include Canterbury (11 miles west), Margate (7 miles north), Dover (10 miles south), Ramsgate (5 miles north-east), Broadstairs (6 miles north-east) and Whitstable (14 miles west).
Around Great Stonar
Around Great Stonar, our work takes us to homes and buildings near Prince's Beachlands, Sir Roger Manwood's School and Invicta House Ye Olde King's Arms, among other places. The closest station to Great Stonar is Sandwich station, about 1.2 miles south. A little further out are The Precinct Toy Collection (0.8 miles south) and Sandown Castle (4.3 miles south-east). The countryside around Great Stonar includes Monk's Wall nature reserve.
Looking after it afterwards
Simple care keeps the joints in good condition. Our advice:
- Show decorators and builders where the movement joints are
- Leave the joints unpainted unless we have said otherwise
- Check external joints each spring
- Fix overflowing gutters above sealed joints
Do not let soil, plants or ivy build up against the new joints. Anything that holds water against the joint wears it out sooner.
If you can see gaps, plants or bare sections in a joint, have it checked. Early work is quicker and leaves a better finish.
Also near Great Stonar
What else we do in Great Stonar
DIY versus a professional finish
The biggest DIY mistake is sealing over old sealant. 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.
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
Why it’s worth doing now in Great Stonar
It often makes sense to reseal all the failing joints on an elevation together. Joints of the same age tend to fail together and it means sorting access once. Where a wall is exposed, as many are in small places like Great Stonar, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether we need extra access for height. Your quote takes all of that into account.
Why choose Mr Mastic in Great Stonar
- White, clear, grey or coloured to suit, where the product allows
- Over 20 years’ experience
- We never seal over old sealant
- Colour picked to suit the job
See our cost guide or our reviews.
Your questions about external mastic in Great Stonar
I let a flat near Sandwich station. Can you help?
Yes, landlords and agents are among the people we work for. Just phone 0345 464 0079 or send us an email with the address and what needs doing, and we’ll send you a clear quote.
Do you cover smaller places like Great Stonar?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
What’s an expansion joint in brickwork?
A vertical gap in a long brick wall is generally a movement joint. It gives the wall room to move, and it should be sealed with a flexible sealant.
Do the sealants smell?
Possibly a little. Any smell clears as the sealant cures.
Can you seal over the old sealant?
No. New silicone will not bond to old silicone, and anything trapped underneath, including mould and water, stays there. We remove it all first.
Is it worth trying it myself?
That depends on the joint. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional, while a short indoor joint may be within reach.
Should I point up the gap in my brickwork?
No. Cement or mortar cannot stretch. If it has already been filled, we can normally cut it out and reseal it.
Is the work guaranteed?
Yes, for a year. If there’s a problem with our work in that time, tell us and we’ll put it right.