Kent · England
External & façade joints in Hartley, Kent
Specialist external mastic for Hartley: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Hard, crazed mastic that has stopped moving
- Rain getting behind render or cladding at a joint
- Sealant that has lost its bond to the brick or render
Why act early in Hartley
Running new sealant over the old bead rarely lasts. New sealant doesn’t bond well to old, weathered sealant, so we always take the old sealant out. In a small place like Hartley, homes can be exposed to wind and rain, which finds any gap, 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, along with when we can work on site. Ask us for a quote and we will go through it with you.
What you get with us
- An ARBOMaster approved applicator
- Neat joints and a tidy finish
- Full insurance on every job
- Sanitary silicone with an anti-fungal additive in wet areas
Read how sealant jobs are priced or our reviews.
How we handle external mastic in Hartley
On houses, flats and commercial buildings across Hartley, we reseal joints in brickwork, render, cladding and façade panels. The preparation is the same whatever the wall: clean, sound faces and a controlled depth. Typical jobs include cracked joints where brick meets render or frames and failed sealant between panels on a façade, across brickwork movement joints, render & cladding joints and joints between brick and frames.
Outside joints can only be sealed when they’re dry, so work in Hartley is booked around the forecast. Let us know about access to every wall, plus any garages or outbuildings.
Big or small, it’s backed by our 12-month guarantee.
- Where
- Hartley (TN17)
- Region
- Kent
- Guarantee
- A year, on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Common questions in Hartley
Is Hartley in your area for external mastic?
Yes. Our work covers London and the South East, and Hartley is part of that. You can ring 0345 464 0079 or email us and tell us what needs doing.
Is external mastic in Hartley guaranteed?
All our work, in Hartley and everywhere else, comes with a 12-month guarantee. We’re also fully insured and ARBOMaster approved.
Are you insured?
Yes, we are fully insured.
How long does external mastic take?
A typical job takes anything from a few hours to several days, depending on the building. Your quote will say how long we expect yours to take.
Is it messy?
Not at all. We work neatly, protect the area around the joints and tidy up afterwards.
Are you ARBOMaster approved?
Yes. We hold ARBOMaster approved applicator status and we’re fully insured too.
Can you do several jobs on one visit?
Yes. Just list everything you need and we will quote it together.
What information do you need?
A short description and the location, plus pictures if you have them. If we need more, we will ask.
Honest limits
It helps to know what we cannot do too:
- Damp that is not coming from the joint
- Cracked brickwork or render that needs a builder or plasterer
- Render that is blown, hollow or coming away
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we’ll tell you honestly before you book.
Where we work in Hartley
- Brickwork movement joints
- Copings & trims
- Façade panels
- Render & cladding joints
- Joints between brick and frames
- Concrete & block
How to look after the new joints
So the new joints stay in good condition:
- Look over the joints every year, ideally after winter
- Point out the joints to other trades
- Keep soil, plants and ivy away from the joints
- Check the sealant is paintable before painting near it
Keep the joints clear of soil, plants and climbing growth. Damp material against the sealant shortens its life.
Once a joint cannot move, the wall finds another way, generally as cracking in the brickwork or render nearby. Resealing it early helps prevent that.
External mastic in Hartley: local notes
Historic houses like Scotney Castle (about 4.4 miles west) are a reminder that the area around Hartley has older buildings as well as new. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material. Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Historic houses such as Scotney Castle, about 4.4 miles west, show how far back building around Hartley goes.
Hartley is about 8 miles south-east of Paddock Wood, in Kent. Whether you are in the middle of Hartley or further out, we cover external mastic for every kind of property, from flats and houses to offices and hotels. Across Kent, we cover 922 places, and Hartley is one of them. Our Crawley page covers work nearby, about 30 miles away.
We cover every part of the TN17 postcode area for external mastic. If you need external mastic at a property on Hartley Road, Campion Crescent and Hartley Court Gardens or a nearby road, we can help. Neighbouring places we cover for external mastic include Swattenden (1 mile east), Cranbrook (1 mile north-east), Baker's Cross (2 miles north-east), Gill's Green (2 miles south) and Beal's Green (2 miles south). Further out, we also cover Maidstone (13 miles north), Royal Tunbridge Wells (11 miles west), Tonbridge (13 miles north-west), Kings Hill (14 miles north), Foley Park (14 miles north) and Paddock Wood (8 miles north-west).
What’s near Hartley
Locally, jobs take us to homes and businesses close to Crane Valley and the streets around them. Nearby you will also find Benenden Hospital (4.7 miles east) and Sissinghurst Castle (3.8 miles north-east).
DIY sealant or a professional job?
If you’re set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it does not work out, we can still put it right.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
What we do, step by step
Our applicators work methodically: protect, prepare, seal, tidy. For most jobs that takes anything from a few hours to several days, depending on the building. Somewhere like Hartley 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.
- We start by checking each joint, agreeing the ones to redo and how we’ll reach them.
- The old mastic and anything lodged in the joint is removed.
- Both sides are cleaned back to sound material and primed if needed.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
Getting ready for the visit
- Try not to wet indoor joints just before the visit
- Let us know about parking restrictions
- Let us know about earlier repairs to the joints
How to get a quote
Getting a quote is simple: let us know the job and the location. A few pictures by email make the job easier to understand, and we will take it from there.
Read more
Nearby places to Hartley
Other services in Hartley
Common problems we fix in Hartley
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 cannot stretch and rips as the joint opens.
People usually contact us when they notice something like this:
- Hard, crazed mastic that has stopped moving
- Damp patches traced to an open external joint
- Rigid filler in a joint that should flex
- Movement joints with cracked, split or missing sealant
If you look after a building such as High Weald Academy, larger buildings have long runs of movement joint that eventually need resealing.
What to look for in a quote
- What the quote includes, VAT included or not
- How the joint is cleaned and prepared
- Are they insured?
- How long the guarantee is
What affects the quote in Hartley
We quote each job individually. These are the things that affect it:
- How easy the joints are to reach
- When we can work, for business premises
- The type of sealant required
- How many areas need sealing
No two jobs are quite the same, so each one gets its own quote. Size, access and the product the joint needs all play a part.
What to tell us for a quote
You do not need to know the technical terms. It helps if you can tell us:
- How we’d reach the joints
- Any previous sealing or DIY work
- The type of property
- Pictures of the joints, sent by email
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we’ll explain what’s involved and give you a clear quote.