Kent · England
External & façade joints in Sissinghurst, Kent
External mastic for Sissinghurst, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Damp patches traced to an open external joint
- Movement joints with cracked, split or missing sealant
- Failed sealant between panels on a façade
Looking after it afterwards
Good habits help new joints last longer. Our tips:
- Keep movement joints as flexible joints, not mortar
- Fix overflowing gutters above sealed joints
- Point out the joints to other trades
- Check external joints each spring
Have a quick look at the joints each spring. Splits, gaps at the edges or plants in the joint are early warning signs.
If you can see gaps, plants or bare sections in a joint, have it checked. Earlier resealing means a smaller job and a better result.
External mastic in Sissinghurst
Many failed façade joints only get noticed once there’s a stain or a damp patch inside. We look over the joints, agree the ones to renew and reseal with a flexible, weatherproof product. Common call-outs are for rain getting behind render or cladding at a joint and movement joints with cracked, split or missing sealant, across concrete & block, copings & trims and façade panels.
Around Sissinghurst, older buildings can be stone, brick or timber-framed, many with extensions added later. Where one material meets another is where water generally gets in, and they need the right sealant at the right depth.
All of our work is guaranteed for twelve months.
- Where
- Sissinghurst (TN17)
- Wider area
- Kent
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
What we do, step by step
When we arrive, we look over the joints with you first, so there are no surprises. Surfaces next to the work are protected before any work starts. The work normally takes a few hours to a few days, depending on the length of joint and the access. Somewhere like Sissinghurst needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- First, the joints are inspected and the access agreed.
- Every bit of old sealant and any mortar or debris is cut out.
- The faces are brushed clean and primed where the product requires 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
- Let us know about stairs, lifts or work at height
- For indoor joints, keep the area dry beforehand if you can
- Clear items away from the joints we’re working on
Ask for a quote
For external mastic in Sissinghurst, ring 0345 464 0079 or send us an email. Tell us what the problem is and where, and we will agree the price before any work begins.
Read more
Also near Sissinghurst
What else we do in Sissinghurst
Can I do it myself?
The difference is mostly in the preparation and the 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.
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
Different surfaces, different methods
Joints between dissimilar materials
Joints where frames, sills or panels meet the wall are common leak points. We cut out the old sealant and reseal with a product suited to both surfaces.
Concrete and blockwork
Concrete and block walls shrink as they dry and move with temperature. Their movement joints are sealed over backing rod with a flexible sealant.
When it is not the sealant
We’d rather tell you now than do work that will not last, so here’s what sealant can’t put right:
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Cutting new joints into brickwork, which is building work rather than sealant work
- Structural movement, which needs a surveyor or engineer
If you are not sure, just phone 0345 464 0079 or drop us an email and we’ll give you a straight answer.
Surfaces we seal
- Façade panels
- Render & cladding joints
- Joints between brick and frames
- Brickwork movement joints
- Copings & trims
- Concrete & block
Sissinghurst: your questions answered
Do you work for landlords with property near Staplehurst station?
Yes, landlords and agents are among the people we work for. You can phone 0345 464 0079 or drop us an email with the details for a clear quote.
Do you cover smaller places like Sissinghurst?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Is it OK to fill a movement joint with cement?
No, not if it’s a movement joint. Filling it with mortar defeats its purpose. We’ll reseal it with a flexible sealant.
How do you reach high-level joints?
That depends on how high the joints are and the ground below. Low-level joints are straightforward; for higher ones, send details and we will confirm the access.
Where is Mr Mastic based?
Mr Mastic is based in Crawley. Our applicators cover Sissinghurst, along with the rest of our area.
How long does the job take?
As a guide, most jobs take anything from a few hours to several days, depending on the building. Bigger jobs take longer, and we will say how long yours will take.
Should I try DIY first?
Sometimes. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
Which products do you use?
Each joint gets the product that suits it. Movement, water and weather all affect the choice, and we’ll tell you what we are using.
For landlords and businesses
For anyone letting property in or around Sissinghurst, several properties can be quoted together. Send us the addresses and the work at each, and photos by email help.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
Outside joints around Sissinghurst
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For landlords with property near Staplehurst station, split movement joints are easy to miss on a rental until damp shows inside. Schools such as Cranbrook School are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. Homes close to Church of the Holy Trinity include some older properties, and an extension built onto an older house moves differently, and the joint between them takes the strain.
Sissinghurst is about 11 miles south of Maidstone, in Kent. We carry out external mastic for householders, landlords and businesses in Sissinghurst and the surrounding area, as part of our work across Kent. Our Kent coverage runs to 922 places, Sissinghurst among them. For nearby work, see our Crawley page, about 32 miles away.
Our applicators cover all of the TN17 postcode area for external mastic. If you need external mastic at a property on The Street, Milkhouse Cottages and Cobnut Close or anywhere close by, we can help. We also cover the places around Sissinghurst: Wilsley Pound (1 mile west), Cranbrook Common (1 mile north), Wilsley Green (1 mile south-west), Knox Bridge (2 miles north) and Colliers Green (2 miles west). Further out, we also cover Maidstone (11 miles north), Ashford (14 miles east), Royal Tunbridge Wells (13 miles west), Tonbridge (14 miles north-west), Kings Hill (13 miles north-west) and Foley Park (12 miles north).
Near you in Sissinghurst
In Sissinghurst, that means homes and buildings near Crane Valley and The Bull Public House and the streets around them. The nearest railway station is Staplehurst station, roughly 4.3 miles north of the centre. Other landmarks nearby include Sissinghurst Castle (1.1 miles east) and Benenden Hospital (3.1 miles south-east).
Leave it or put it right?
An open joint keeps letting water into the wall with every downpour. Wet masonry is more easily damaged by frost near the open joint, so the problem grows beyond the joint itself. Where a wall is exposed, as many are in small places like Sissinghurst, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Homes and businesses are quoted the same way: the amount of work, how we reach it and what it needs. Call for a quick quote and we’ll go through it with you.
What you get with us
- Tidy, careful work
- A sealant colour to suit the surroundings
- Fully insured
- 4.9 on Google from 180+ five-star reviews
See what affects the cost or our reviews.