Kent · England
External & façade joints in Marden, Kent
Specialist external mastic for Marden: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Cracked joints where brick meets render or frames
- Old sealant gone brittle and cracked
- Brick movement joints where the sealant has split
External mastic in Marden
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 are dealing with movement joints with cracked, split or missing sealant and rain getting behind render or cladding at a joint, we can help.
Houses in smaller places like Marden can stand more in the open than those in a built-up town, so exposed walls and rooflines take more wind-driven rain. Joints on those sides are generally the first to go.
You’re covered for a year from the day we finish. If there’s a problem with it, please ring 0345 464 0079 or send us an email.
- Place
- Marden (TN12)
- Wider area
- Kent
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
What we do, step by step
All our tools and materials come with us in the van, so you don’t need to buy or prepare anything. After a quick look at the joints together, we protect the area and start. It normally takes a few hours to a few days, depending on the length of joint and the access. For a job in Marden, we agree the time, the access and parking before the day. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- We start by walking round the building and agreeing the joints and the access.
- We cut out the old mastic and rake out anything in the joint.
- Joint faces are cleaned back and primed if the sealant needs it.
- We fit closed-cell backing rod to control the depth.
- The exterior sealant is applied, tooled and checked along its length.
Getting ready for the visit
- Mention any parking rules near the property
- Clear the area around the work
- Mention any tricky access
Get a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we will explain what’s involved before giving you a price.
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Marden buildings and the weather
Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Letting a property close to Marden station? Then split movement joints are easy to miss on a rental until damp shows inside. Managing a site like Marden Primary School? Then movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Marden is about 7 miles south of Maidstone, in Kent. Homes, rented property, offices and hotels in Marden is covered for external mastic. Every job comes with our 12-month guarantee. 922 places in Kent are on our list. You can also see our page for Crawley, about 30 miles away.
Every address in TN12 is within our area for external mastic. Streets in the area include High Street, The Old Market and Rookery Court, and we cover them all. Nearby, we also carry out external mastic in Marden Beech (1 mile south-west), Claygate (2 miles west), Pearson's Green (3 miles west), Brandfold (3 miles south-west) and Capel Cross (3 miles south-west). Within a short drive, we also cover Maidstone (7 miles north), Sevenoaks (15 miles north-west), Royal Tunbridge Wells (10 miles west), Tonbridge (9 miles west), Kings Hill (8 miles north-west) and Foley Park (8 miles north).
Around Marden
Marden has its own railway station: Marden station. Well-known places in the area include South East Romany Museum (0.9 miles east).
Signs you need external mastic in Marden
If plants are growing out of a joint, the sealant has generally failed or was never there. Roots and dirt hold water against the wall and speed up the damage.
People normally contact us when they notice one of these:
- Movement joints filled with mortar instead of sealant
- Sealant that has lost its bond to the brick or render
- Movement joints with cracked, split or missing sealant
- Failed seals between different materials
For an older house near a landmark such as St Michael and All Angels Church, an extension built onto an older house moves differently, and the joint between them takes the strain.
What to look for in a quote
- What preparation is included
- Whether VAT is included
- Are they insured?
- Whether you can choose the colour
What we can’t put right
New sealant cannot fix everything, and we’d rather say so up front. Sealant will not put right:
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Failed render or damaged cladding panels
- Cutting new joints into brickwork, which is building work rather than sealant work
If you’re not sure, just ring 0345 464 0079 or drop us an email and we’ll give you a straight answer.
What we seal
- Concrete & block
- Render & cladding joints
- Brickwork movement joints
- Copings & trims
- Joints between brick and frames
- Façade panels
For landlords and businesses
If you manage several properties in or around Marden, several properties can be quoted together. Just tell us the addresses and what each one needs, and pictures by email help.
In hotels, rooms out of use cost money, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
What affects the quote in Marden
Jobs vary more than people expect. The main factors:
- Access and height
- Working hours on commercial sites
- The amount of work
- Whether there’s mould to deal with
A few things move the cost up or down: the old material and how easily it comes out, whether mould needs treating, and whether we need extra access for height. We take all of that into account in your quote.
What we need to know
To make quoting easier, please include:
- The type of property
- How we’d reach the joints
- How many joints, rooms or windows are involved
- Photos by email, if that is easy
Asking for a quote is easy: tell us what needs doing and where, and roughly how big it is. Photos by email help us understand the job, and we’ll come back to you with a quote.
Aftercare tips
Aftercare is simple:
- Get split or bare joints resealed while the damage is small
- Leave the joints unpainted unless we’ve said otherwise
- Check external joints each spring
- Don’t let climbing plants root in the sealant
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.
An open movement joint lets rain into the wall every time it pours. That can lead to damp patches, staining and frost damage, all bigger jobs than a reseal.
Surface by surface
Copings and trims
Metal and stone copings both move with temperature, so a flexible sealant suits them best year round.
Render joints
Water behind render can lead to blown patches. A sound joint keeps the render dry behind and protects the render itself.
Common questions in Marden
Can you help a landlord with a rental near Marden station?
Yes, we work for landlords and agents. You can phone 0345 464 0079 or send us an email with the address and a few details, and we’ll give you a fixed price before any work starts.
Is Marden in your area for external mastic?
Yes. We work across London and the South East, and Marden is part of that. You can call 0345 464 0079 or drop us an email and tell us what needs doing.
Will you leave a mess?
We keep the work tidy. We protect what’s around the joints, and we clear up when we’re done.
Can you seal joints between render and window frames?
Yes. Where different materials meet is one of the most common joints we seal. We use a flexible sealant suited to both surfaces, primed where needed.
Are you fully insured?
Yes. We’re fully insured, with over 20 years’ experience in sealant work.
How much does external mastic cost in Marden?
We don’t publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. We agree the price before any work begins.
Do you use backing rod?
We fit closed-cell backing rod wherever the joint depth needs controlling. It controls the depth and stops the sealant bonding to the back.
Does someone need to be in?
For indoor joints, yes, someone needs to let us in. Once we have agreed the job, you do not need to watch us work.