Kent · England
Glassenbury External Mastic
External mastic across Glassenbury and nearby, with old sealant always removed completely.
- Water getting into walls through failed joints
- Leaking joints around cladding and façade panels
- Weeds or debris growing in open joints
External mastic for homes and businesses in Glassenbury
Short cuts in external joints show up within a season or two. Overfilled joints, missing backing rod and sealant laid over old sealant rarely last long. We take the old material out and do it properly. We are often asked to deal with old sealant gone brittle and cracked and sealant pulling away from one side of the joint, across copings & trims, joints between brick and frames and render & cladding joints.
Older homes in small places like Glassenbury may be stone, brick or timber-framed, often with later extensions. Where one material meets another is where water normally gets in, and they need the right sealant at the right depth.
We stand behind the work with a one-year guarantee, so you’re covered after we’ve gone.
- Where
- Glassenbury (TN17)
- Wider area
- Kent
- Guarantee
- A year, on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
FAQs for Glassenbury
Is Glassenbury within the area you cover?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Is there a guarantee on external mastic in Glassenbury?
Every job comes with our 12-month guarantee, wherever it is. We’re also fully insured and ARBOMaster approved.
Will you leave a mess?
Not at all. We work neatly, protect the area around the joints and tidy up afterwards.
Are you fully insured?
Yes, we are fully insured for domestic and commercial work.
What’s an expansion joint in brickwork?
A movement joint is a planned break in the wall that absorbs expansion and shrinkage. It’s sealed with a flexible sealant, not mortar.
Is there any odour?
Sometimes, a little. It fades as the sealant cures, and ventilation helps.
What should I tell you?
Just the basics: where it is, what you’ve noticed and how we reach it. Then call 0345 464 0079 or email us.
What colours does the sealant come in?
Exterior sealants are made in a range of colours, from greys and browns to whites and stone shades. We choose the closest to your brick or render so it doesn’t stand out.
Nearby places to Glassenbury
Other services in Glassenbury
For landlords and businesses
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
Whether it’s one flat or a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
How the job changes by surface
Brickwork movement joints
Vertical joints in long brick walls let the brickwork expand without cracking. They’re resealed over backing rod with a low-modulus sealant in a colour to suit the brick.
Cladding and façade panels
If the façade has a specified sealant, that is what we use. Tell us what the building has when you get in touch.
Honest limits
We’ll always be straight with you, so here’s what sealant cannot fix:
- Cutting new joints into brickwork, which is building work rather than sealant work
- Structural movement, which needs a surveyor or engineer
- Cracks in the bricks or render themselves, away from the joints
If you’re not sure, just ring 0345 464 0079 or send us an email and we’ll give you a straight answer before booking.
Joints and surfaces we work on
- Render & cladding joints
- Concrete & block
- Copings & trims
- Façade panels
- Brickwork movement joints
- Joints between brick and frames
How it works
When we arrive, we look over the joints with you first. Surfaces next to the work are protected before work begins. The work usually takes anything from a few hours to several days, depending on the building. For a village or hamlet like Glassenbury, the journey is planned in advance: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- We cut out the failed sealant and rake out any dirt or growth.
- We clean both faces of the joint and prime them where the product calls for it.
- 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.
How to prepare
- For business premises, tell us about site rules or sign-in
- Mention any leaks or damp you’ve noticed
- Mention any parking rules near the property
Getting a quote
Need a quote? Please call 0345 464 0079 or send us an email and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
Read more
Do you need external mastic in Glassenbury?
If plants are growing out of a joint, the sealant has usually failed or was never there. Dirt and roots then trap moisture in the joint and make things worse.
The problems people usually mention when they call are:
- Plants rooting in failed movement joints
- Failed sealant between panels on a façade
- Damp patches traced to an open external joint
- Weathered mastic that no longer stretches
Historic houses such as Scotney Castle, about 4 miles west, show how far back building around Glassenbury goes, and older homes nearby need a sealant that suits their walls.
What your quote should include
- Is VAT in the price?
- Whether all the old sealant comes out first
- Whether the sealant suits the joint
- Which colour the sealant will be
What affects the cost of external mastic
We quote each job individually. This is what makes a difference:
- Any mould that needs treating
- The number of rooms or windows
- Any working-time requirements on site
- The size of the job
Combining jobs into one visit is usually more efficient than separate visits, so tell us about everything that needs sealing. We’ll send you a clear quote for the lot.
What to tell us for a quote
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- How many joints, rooms or windows are involved
- Where the job is, and your postcode
- Any previous sealing or DIY work
- Whether it’s a home or a business
Getting a quote is simple: tell us what needs doing and where, and roughly how big it is. A few photos by email make the job easier to understand, and we will take it from there.
Why act early in Glassenbury
A failed movement joint lets water into the wall, behind render and cladding. Resealing early keeps the job to the joint itself, rather than the wall around it. Around Glassenbury, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
What it costs depends on the amount of work, how hard the old material is to remove and access to the work. We give a clear quote before any work starts.
Why Glassenbury customers choose us
- Rated 4.9 stars on Google
- White, clear, grey or another colour, product permitting
- Tidy, careful work
- Sealant colour chosen to suit
Read our cost guide or our reviews.
Outside joints around Glassenbury
London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Historic houses like Scotney Castle (about 4 miles west) are a reminder that the area around Glassenbury has older buildings as well as new. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material.
Schools such as High Weald Academy are buildings too, and larger buildings have long runs of movement joint that eventually need resealing.
Glassenbury is about 10 miles east of Royal Tunbridge Wells, in Kent. Homes, rented property, offices and hotels in Glassenbury can book us for external mastic, old or new, large or small. The work is guaranteed for a year. Our area takes in 922 places across Kent, from the larger towns to small villages. There’s also a page for Crawley, roughly 30 miles from Glassenbury.
All of TN17 is covered for external mastic, from the main roads to the quietest streets. We also cover Goudhurst (2 miles north-west), Brandfold (2 miles north-west), Smallbridge (3 miles north-west), Broad Ford (3 miles north-west) and Capel Cross (3 miles north-west). Larger places within reach include Maidstone (11 miles north), Royal Tunbridge Wells (10 miles west), Tonbridge (12 miles north-west), Kings Hill (12 miles north), Foley Park (12 miles north) and Paddock Wood (7 miles north-west).
Landmarks near Glassenbury
We work in homes and buildings around Crane Valley and the streets around them. Nearby you will also find Benenden Hospital (5.3 miles east) and Sissinghurst Castle (3.7 miles east).