Kent · England
Haine External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for Haine, backed by a 12-month guarantee. Ask us for a quote.
- Rain getting behind render or cladding at a joint
- Movement joints filled with mortar instead of sealant
- Sealant that has lost its bond to the brick or render
How the visit works
At the end, we look at the finished work together. The work normally takes a few hours for a handful of joints, longer for a whole elevation, depending on how much there is to do. Somewhere like Haine 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.
- Each joint is checked and the colour of the new sealant agreed.
- Failed sealant is removed back to clean, sound faces.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- We prime the faces where required.
- We gun in low-modulus sealant and tool it neatly.
Before we arrive
- For indoor joints, keep the area dry beforehand if you can
- Tell us about access, such as stairs, a lift or high-level joints
- Mention any parking rules near the property
Ask for a quote
Asking for a quote is easy: let us know what needs doing and where and its rough size. A few photos by email make the job easier to understand, and we will take it from there.
Advice
About our external mastic in Haine
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 in a matching colour. We work on joints between brick and frames, brickwork movement joints and façade panels, and the jobs we see most are gaps where render, brick and frames meet and failed sealant between panels on a façade.
Around Haine, older buildings can be stone, brick or timber-framed, many with extensions added later. The joints where those materials meet are the weak points, and they need the right sealant at the right depth.
All of our work is guaranteed for twelve months, in Haine and everywhere else we cover.
- Place
- Haine (CT12)
- Region
- Kent
- Guarantee
- One year on every job
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
What the job involves on each surface
Concrete and blockwork
Concrete and block walls shrink as they dry and move with temperature. We reseal their joints with backing rod and a flexible product.
Joints between dissimilar materials
Each side of the joint may need its own preparation. Both surfaces are cleaned and primed as the product requires.
Other services in Haine
Keeping the joints in good condition
Looking after new joints is easy, and it makes a real difference:
- Get split or bare joints resealed while the damage is small
- Keep water from gutters off the wall
- Look over the joints every year, ideally after winter
- Show decorators and builders where the movement joints are
Don’t let soil, plants or ivy build up against the new joints. Damp material against the sealant shortens its life.
Water getting behind cladding or render can go unnoticed for a long time. When it finally shows inside, the joint may have been open for years.
Landlords, agents and businesses in Haine
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
Common questions in Haine
Do you cover smaller places like Haine?
Yes, Haine is covered. Our work covers London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Is external mastic in a coastal place like Haine any different?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. Choosing the right sealant for the frame and wall, laid at the right depth, helps it last.
Is there a guarantee?
Yes, always. Each job is guaranteed for twelve months, large or small.
When is the sealant fully cured?
Most sealants are touch-dry well before they’re fully cured. We’ll tell you how long to leave the joint before we leave.
What does external mastic cost?
There’s no set price, as it depends on the job: how much there is, what’s there now, how we reach it and what it needs. You’ll get a clear quote before work begins.
Is it OK to seal over old sealant?
No, because it fails. We remove every bit of old sealant first, so the new sealant bonds properly.
Can you quote for more than one area?
Yes, we can. Several rooms, windows or areas can go on one quote.
Do you take out the old sealant first?
Yes, every time. New silicone does not stick to old silicone, so the joint is cleaned back first.
Why deal with it now?
Sealing over the top of old mastic does not hold for long. The new layer can’t bond properly to old, weathered material, so the old joint is cut out fully first. Where a wall is exposed, as many are in small places like Haine, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all make a difference.
Why choose Mr Mastic in Haine
- Any old sealant cut out fully, not covered over
- Tidy, careful work
- More than 20 years in sealant work
- White, clear, grey or coloured to suit, where the product allows
Take a look at how sealant jobs are priced and customer reviews.
Common problems we fix in Haine
Sometimes a movement joint was filled with mortar or a rigid filler, often by someone who didn’t know what it was for. The joint cannot move, so the wall cracks somewhere else instead.
It’s worth asking for a quote if you see:
- Hard, crazed mastic that has stopped moving
- Panel joints letting water in
- Joints with sealant missing in places
- Moss and dirt in joints with no sealant left
For site and facilities teams at buildings such as Dame Janet Primary Academy, its movement joints, gutters and trims need looking after like any other building’s.
Questions to ask before booking
- Who does the work, and how experienced they are
- Whether they’re fully insured
- What the quote includes, VAT included or not
- How the joint is cleaned and prepared
Should I try it myself first?
A DIY attempt does not rule out a professional job. We cut it out and start again, so tell us about it when you ask for a quote.
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Outside joints around Haine
Haine is within about 2 miles of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. Both are hard on movement joints and outside wall joints, which can dry out and crack sooner where a building faces the weather. With historic houses such as Quex Park (about 3 miles west) nearby, there’s older building stock in the area around Haine as well as newer homes. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material.
Letting a property close to Ramsgate station? Then split movement joints are easy to miss on a rental until damp shows inside. In the older streets around St Christopher's Church, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Haine is about 2 miles north-west of Ramsgate, in Kent. Anywhere in CT12, we can carry out external mastic at your property. Haine is one of 922 places in Kent where we work. Chelmsford is on our list too, around 47 miles away.
We cover every part of the CT12 postcode area for external mastic and the streets around it. That includes homes and businesses on Hawthorn Grange and Haine Road. We also cover the places around Haine: Newington (1 mile south-east), Westwood (1 mile north), Manston (1 mile south-west), Flete (1 mile north-west) and Chilton (2 miles south). We also work in nearby towns such as Canterbury (14 miles west), Dover (15 miles south), Whitstable (15 miles west), Deal (10 miles south), Herne Bay (11 miles west) and Walmer (10 miles south).
Near you in Haine
We work in homes and buildings around The Royal Harbour Academy and the streets around them. Haine’s nearest station is Ramsgate station, roughly 1.2 miles south-east of the centre. Other landmarks nearby include Westwood Cross (0.5 miles north-east) and Spitfire and Hurricane Memorial Museum (1.6 miles west). Open spaces near Haine include Sandwich and Pegwell Bay.