Kent · England
External & façade joints in Goathurst Common, Kent
External mastic in Goathurst Common from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Rain getting behind render or cladding at a joint
- Failed sealant between panels on a façade
- Movement joints with cracked, split or missing sealant
Common problems we fix in Goathurst Common
Using the wrong sealant is another common reason. A high-modulus or general-purpose sealant can be too rigid for a busy joint, so it pulls away from the edges.
It’s worth asking for a quote if you see:
- Gaps where render, brick and frames meet
- Hard, crazed mastic that has stopped moving
- Weeds or debris growing in open joints
- Sealant pulling away from one side of the joint
Homes close to Church of St Mary at South End of Village Green include some older properties, and old and new materials meet at the roofline and walls, which is where sealant earns its keep.
What to look for in a quote
- The length of the guarantee
- Which sealant they’ll use, and why
- What the cure time is
- Which colour the sealant will be
External mastic in Goathurst Common
Where two different materials meet, such as brick and render or blockwork and metal, they move at different rates. A flexible sealant bridges the two. If you have movement joints filled with mortar instead of sealant and rain getting behind render or cladding at a joint, we can put it right, whatever the surface.
Older homes in small places like Goathurst Common may be stone, brick or timber-framed, often with later extensions. Where one material meets another is where water generally gets in.
Our work is backed for twelve months, in Goathurst Common and everywhere else we cover.
- Place
- Goathurst Common (TN14)
- Region
- Kent
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
What external mastic looks like in Goathurst Common
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. With historic houses such as Chartwell (about 2.6 miles west) nearby, there’s older building stock in the area around Goathurst Common as well as newer homes. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth.
Letting a property close to Sevenoaks station? Then outside joints that have cracked can let damp into a rental, so check them between lets. If you look after a building such as Ide Hill Church of England Primary School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Goathurst Common is about 3 miles south-west of Sevenoaks, in Kent. Across the TN14 area, we can carry out external mastic at your property. Our Kent coverage runs to 922 places, and Goathurst Common is one of them. For nearby work, see our Crawley page.
All of TN14 is covered for external mastic. If you’re just outside Goathurst Common, we cover Ide Hill (1 mile south-west), Toy's Hill (2 miles west), Brasted Chart (2 miles north-west), Sundridge (2 miles north) and Kippington (2 miles north-east). Within a short drive, we also cover Dartford (14 miles north), Sevenoaks (3 miles north-east), Royal Tunbridge Wells (10 miles south-east), Tonbridge (7 miles south-east), Northfleet (15 miles north-east) and Swanley (10 miles north).
Near you in Goathurst Common
We work in homes and buildings around Stubbs Wood Country Park and The Cock Inn. The nearest railway station is Sevenoaks station, roughly 2.5 miles north-east of the centre. A little further out are Sevenoaks Hospital (3.5 miles north-east) and Chiddingstone Castle (4.4 miles south). For a walk, there’s Betsom's Hill and Dryhill Nature Reserve.
Leave it or put it right?
A low-modulus sealant is chosen because it moves without pulling hard at the edges. That matters on brick, render and concrete, which can be weaker at the face. A stiffer product can damage the joint edge as it fails. Where a wall is exposed, as many are in small places like Goathurst Common, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
What you pay reflects the work, not guesswork. That is why we ask a few questions first and agree the price before starting.
Why book with us
- Experience in homes, commercial sites and hotels
- A sealant colour to suit the surroundings
- Old sealant always removed completely
- Rated 4.9 stars on Google
See our cost guide or what customers say.
What the job involves on each surface
Render joints
Render is weaker at the surface than brick, so a low-modulus sealant is kinder to the joint edges. We prime where the product needs it.
Copings and trims
Joints in copings, parapets and trims are exposed to the worst of the weather. We reseal them with an exterior sealant suited to the material.
What happens on the day
We bring everything the job needs with us. Once we’ve agreed what’s being done, the area is protected and the work begins. Most jobs take a few hours to a few days, depending on the length of joint and the access. Somewhere like Goathurst Common needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- We start by walking round the building and agreeing the joints and the access.
- 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
- Move anything stored near the joints
- On commercial sites, let us know about site rules
- Mention any tricky access
How to get a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and add photos by email if you can.
Advice
Aftercare tips
How long the joints last depends on use and care. We suggest:
- Ask before painting over external sealant
- Act on the first splits you see
- Keep movement joints as flexible joints, not mortar
- Clear growth from the base of walls and joints
If you have more work done on the wall, such as new render, cladding or an opening, show the contractor the movement joints. They must stay as flexible joints, never rendered or pointed over.
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.
Landlord and commercial work in Goathurst Common
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
For anyone letting property in or around Goathurst Common, several properties can be quoted together. Send us the addresses and the work at each, and pictures by email help.
Also near Goathurst Common
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Goathurst Common: your questions answered
I let a flat near Sevenoaks station. Can you help?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or send us an email and tell us about the property, and we’ll give you a clear quote.
Is Goathurst Common within the area you cover?
Yes. Goathurst Common is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Do you have insurance?
Yes. We are fully insured, and we’ve been doing sealant work for more than 20 years.
Will it make a mess?
No. We work neatly, protect the area around the joints and tidy up afterwards.
Can you seal over the old sealant?
No, it will not last. It can look neat for a few weeks, but the new bead soon lifts. The old sealant has to come out completely.
Can you do several jobs on one visit?
Yes. Just list everything you need and we will quote it together.
Is there a guarantee?
Yes. There’s a 12-month guarantee on every job, large or small.
Why is there a gap in my brick wall?
A movement joint is a planned break in the wall that absorbs expansion and shrinkage. It’s sealed with a flexible sealant, not mortar.
Quotes for external mastic in Goathurst Common
There’s no set price list. The quote depends on:
- The type of sealant required
- The number and length of the joints
- Access and height
- The old material and how stubborn it is
Doing several joints on one visit is normally more efficient than separate visits, so tell us about everything that needs sealing. You will get one clear quote for the whole job.
Asking for a quote
To make quoting easier, let us know:
- Any access issues, like height or stairs
- Whether it’s a home or a business
- The rough size of the job
- Whether it has been sealed before
We quote each job on its own. Just ring 0345 464 0079 or email us with the details.