Kent · England
Goodley Stock External Mastic
Movement joints in Goodley Stock need attention? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Old sealant gone brittle and cracked
- Sealant that has lost its bond to the brick or render
- Plants rooting in failed movement joints
External mastic in Goodley Stock
We cut out failed sealant, set the joint depth with closed-cell backing rod and reseal with a low-modulus exterior sealant. We pick a colour that sits well with the wall so the line blends in. We work on render & cladding joints, façade panels and concrete & block, and the jobs we see most are rain getting behind render or cladding at a joint and weathered mastic that no longer stretches.
Outside joints can only be sealed when they’re dry, so work in Goodley Stock is booked around the forecast. Tell us about access to all sides of the building, including outbuildings and garages.
Big or small, you get the same one-year guarantee.
- Place
- Goodley Stock (TN8)
- Wider area
- Kent
- Cover
- A year, on every job
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
When it isn’t the sealant
Honest advice matters more to us than a booking, so here’s what new sealant won’t do:
- Structural movement, which needs a surveyor or engineer
- Walls that need new movement joints cut into them
- Damp that isn’t coming from the joint
If you’re not sure, just call 0345 464 0079 or drop us an email and we’ll give you a straight answer.
What we seal
- Render & cladding joints
- Façade panels
- Joints between brick and frames
- Brickwork movement joints
- Concrete & block
- Copings & trims
Towns and villages near Goodley Stock
More services for Goodley Stock
Questions from Goodley Stock
Will you come out to Goodley Stock?
Yes. Goodley Stock is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Do you cover Goodley Stock for external mastic?
Yes, Goodley Stock is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or send us an email and tell us what needs doing, and we will send you a clear quote.
Can I add another job to the visit?
Yes. Tell us about everything you’d like done.
Will it make a mess?
We keep the work tidy. We protect what’s around the joints, and we clear up when we’re done.
How do you reach high-level joints?
Each building is different. Tell us the height, the number of joints and what’s below them.
Can I do it myself?
Sometimes. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
Do I have to be there?
We need access to the joints, so we will agree that with you when we book. For inside work, that normally means someone being in.
Is there any odour?
It depends on the product. Some smell for a while, some hardly at all.
What the job involves on each surface
Concrete and blockwork
Blockwork and concrete shrink over time and move with the seasons. 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.
What external mastic looks like in Goodley Stock
With historic houses such as Chartwell (about 1 mile east) nearby, there’s older building stock in the area around Goodley Stock as well as newer homes. 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, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Rented homes near Hurst Green station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets. In the older streets around Holy Trinity Church, an extension built onto an older house moves differently, and the joint between them takes the strain.
Goodley Stock is about 6 miles south-west of Sevenoaks, in Kent. Anywhere in TN8, we cover external mastic for homes and businesses. Goodley Stock is one of 922 towns and villages in Kent we cover for external mastic. There’s also a page for Crawley, about 14 miles away.
Postcode districts we cover here for external mastic: TN8. We also cover the places around Goodley Stock: Crockham Hill (1 mile south), The Chart (1 mile west), Moorhouse Bank (1 mile north-west), Puddledock (2 miles east) and Pains-Hill (2 miles west). Within a short drive, we also cover Dartford (15 miles north-east), Sevenoaks (6 miles north-east), Royal Tunbridge Wells (12 miles south-east), Tonbridge (10 miles east), Swanley (12 miles north-east) and Kings Hill (15 miles east).
Around Goodley Stock
Locally, jobs take us to homes and businesses close to Carpenters Arms, among other places. The closest station to Goodley Stock is Hurst Green station, roughly 2.4 miles west. Other landmarks nearby include Tandridge Priory (1.5 miles north-west) and Haxted Watermill Museum (3.9 miles south). Not far away are Dryhill Nature Reserve and Betsom's Hill.
Can I do it myself?
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly.
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
Keeping the joints in good condition
Once the sealant has cured, a few habits help it last:
- Point out the joints to other trades
- Check external joints each spring
- Keep high-pressure jets off the joints
- Keep water from gutters off the wall
Do not paint over the new sealant unless we have said the product is paintable. Many exterior sealants are not designed to be painted.
Once a joint cannot move, the wall finds another way, usually as cracking in the brickwork or render nearby. Resealing it early helps prevent that.
Why act early in Goodley Stock
The longer a joint stays open, the more water the wall takes in. Wet masonry is more easily damaged by frost, so the problem grows beyond the joint itself. Around Goodley Stock, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
A few things move the cost up or down: the old material and how easily it comes out, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
Why us?
- A choice of colours where the product allows
- Colour agreed with you before we start
- We leave the area clean and tidy
- An ARBOMaster approved applicator
What affects the cost of external mastic
Some jobs are bigger than they look, and some smaller. The main factors:
- Which sealant suits the joint
- Mould in or behind the old joints
- When we can work, for business premises
- How many rooms, windows or areas are involved
What you pay reflects the work, not guesswork. That is why we ask a few questions first and give you a clear quote before any work starts.
What we need to know
Photos by email are helpful but not essential. Try to tell us:
- Access, such as stairs, a lift or height
- Any previous sealing or DIY work
- The problem you’ve noticed
- The address or postcode of the job
There’s no standard price list, because every job is different. Instead, we send you a clear quote for your job. To get started, phone 0345 464 0079 or send us an email.
The process
Every visit runs the same way: we look at the joints together, protect the area around them, do the work and tidy away. Most jobs take a few hours for a handful of joints, longer for a whole elevation. Somewhere as small as Goodley Stock, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We start by checking each joint, agreeing the ones to redo and how we will reach them.
- Old sealant and any debris are cut and raked out.
- The joint faces are cleaned and primed where the sealant needs it.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
Preparing for the visit
- Let us know about parking restrictions
- For business premises, tell us about site rules or sign-in
- Plan for the work area to be out of bounds to pets and children
How to get a quote
To get a quote, ring 0345 464 0079 or drop us an email with the location and a short description of the problem. We’ll give you a clear price before any work starts.