Kent · England
External & façade joints in Sundridge, Kent
Problem with your movement joints in Sundridge? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Hard, crazed mastic that has stopped moving
- Failed sealant between panels on a façade
- Weeds or debris growing in open joints
How it works
All our tools and materials come with us in the van. After a quick look at the joints together, we protect the area and start. It normally takes anything from a few hours to several days, depending on the building. Somewhere like Sundridge needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- 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.
- 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.
Preparing for the visit
- Tell us about access, such as stairs, a lift or high-level joints
- Plan for the work area to be out of bounds to pets and children
- Move anything stored near the joints
Ask for a quote
For a quick quote, get us on the phone, or email us if that is easier. Describe what needs sealing and we will talk you through the work before giving you a price.
Related advice
External mastic for homes and businesses in Sundridge
Failed sealant is cut out, the depth set with closed-cell backing rod, and the joint resealed with a low-modulus sealant made for outside. The colour is chosen to suit the brick or render so the line blends in. Typical jobs include joints pointed up with cement by mistake and damp patches traced to an open external joint, on copings & trims, concrete & block and façade panels.
In a village or hamlet like Sundridge, older cottages and farm buildings often stand in the open, so walls and rooflines take the full force of wind and rain. Joints on those walls need a sealant that moves with the building and stays in place.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Location
- Sundridge (TN14)
- Wider area
- Kent
- Cover
- One year on every job
- Price
- A clear price before we start
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
What happens if it’s left?
A properly done movement joint is an even line in a colour that suits the wall. A rushed bead with no backing looks untidy and does not last. In a small place like Sundridge, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
There are no prices on our website, because each job is priced on what it involves. Call for a quick quote.
Why us?
- Domestic, commercial and hotel work
- Full insurance on every job
- Anti-fungal sanitary silicone in wet areas
- Arbo and Everbuild products
See our cost guide and our reviews.
What external mastic looks like in Sundridge
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. Historic houses like Quebec House (about 2.3 miles west) are a reminder that the area around Sundridge 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.
For an older house near a landmark such as Church of St Mary, an extension built onto an older house moves differently, and the joint between them takes the strain. Schools such as Combe Bank School are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Sundridge is about 3 miles west of Sevenoaks, in Kent. Homes, rented property, offices and hotels in Sundridge is covered for external mastic. Every job comes with our one-year guarantee. Sundridge is one of 922 places in Kent where we work. For nearby work, see our London page, about 18 miles away.
Our applicators cover all of TN14 for external mastic. Streets in the area include Church Road, Chapmans Road and Main Road, and we cover them all. Neighbouring places we cover for external mastic include Brasted (1 mile west), Chipstead (1 mile north-east), Bessels Green (1 mile east), Brasted Chart (1 mile south-west) and Chevening (2 miles north). Within a short drive, we also cover Dartford (12 miles north), Sevenoaks (3 miles east), Royal Tunbridge Wells (12 miles south-east), Gravesend (15 miles north-east), Tonbridge (9 miles south-east) and Northfleet (14 miles north-east).
Around Sundridge
Around Sundridge, our work takes us to homes and buildings near The White Hart pub, Montreal Park and Trinity School. The closest station to Sundridge is Dunton Green station, roughly 2.4 miles north-east. Well-known places in the area include Sevenoaks Museum (3 miles east) and Sevenoaks Hospital (3 miles east). Not far away are Betsom's Hill and Dryhill Nature Reserve.
Towns and villages near Sundridge
More services for Sundridge
Quotes for external mastic in Sundridge
For a quick quote, just ask. The main things that affect it are:
- The old material and how stubborn it is
- The type of sealant required
- Whether the work is at height
- Whether there’s mould to deal with
What you pay reflects the work, not a rough estimate. That is why we ask a few questions first.
What to tell us for a quote
When you call or email, it’s useful to know:
- Pictures of the joints, sent by email
- How many joints, rooms or windows are involved
- Whether it’s a home or a business
- Whether it has been sealed before
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we’ll explain how we’d tackle it. When it suits you, call 0345 464 0079 or email us.
Should I try it myself first?
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
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.
What we’re called out for in Sundridge
Poor preparation causes many early failures: dusty or wet faces, no primer where one was needed, or old sealant left in. The sealant never bonds properly.
Signs it’s time to call us include:
- Rain getting behind render or cladding at a joint
- Brick movement joints where the sealant has split
- Joints pointed up with cement by mistake
- Moss and dirt in joints with no sealant left
Rented homes near Dunton Green station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets.
What to look for in a quote
- Is the old sealant removed completely?
- What preparation is included
- Is VAT in the price?
- What happens if they find a problem under the old sealant
How to look after the new joints
How long the joints last depends on use and care. We suggest:
- Never let anyone fill a movement joint with mortar
- Keep high-pressure jets off the joints
- Point out the joints to other trades
- Clear growth from the base of walls and joints
Avoid pressure-washing straight into the joints. High-pressure water can lift the edges over time.
If you can see gaps, plants or bare sections in a joint, have it checked. Early work is quicker and leaves a better finish.
Landlord and commercial work in Sundridge
For anyone letting property in or around Sundridge, jobs at different addresses can go on one quote. Just tell us the addresses and what each one needs, and pictures by email help.
We also work for property managers and facilities teams in Sundridge and across Kent. Several sites can go on one quote.
Your questions about external mastic in Sundridge
Will you come out to Sundridge?
Yes, Sundridge is covered. Our work covers London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Is Sundridge in your area for external mastic?
Yes. We work across London and the South East, and Sundridge is part of that. Just ring 0345 464 0079 or drop us an email with a few details of the job.
How long should I leave it?
That depends on the sealant used, so follow the cure time we give you when we finish.
Will you leave a mess?
No. We work neatly, protect the area around the joints and tidy up afterwards.
Do you work for letting agents?
Yes, we do. We work in homes, commercial premises and hotels.
Do you use backing rod?
The foam is closed-cell backing rod. It keeps the sealant at the right depth and bonded to the sides only.
Can I add another job to the visit?
Yes. Just list everything you need and you’ll get one quote.
Are you fully insured?
Yes. We are fully insured, and we can confirm the details when we quote.