Kent · England
Romney Street External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for householders, landlords and businesses in Romney Street. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Cracked joints where brick meets render or frames
- Sealant that has lost its bond to the brick or render
- Panel joints letting water in
What external mastic looks like in Romney Street
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 Lullingstone Castle (about 2.3 miles north-west) are a reminder that the area around Romney Street 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.
Letting a property close to Shoreham (Kent) station? Then split movement joints are easy to miss on a rental until damp shows inside. Homes close to Church of Saint Mary the Virgin include some older properties, and old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Romney Street is about 4 miles north-east of Sevenoaks, in Kent. Homes, rented property, offices and hotels in Romney Street can book us for external mastic. The work is guaranteed for a year. Romney Street is one of 922 places in Kent we cover for external mastic. London is on our list too, about 18 miles from Romney Street.
We cover every part of the TN15 postcode area for external mastic and the streets around it. You will find streets such as Bower Lane and Romney Street, and we cover them all. Close by, we work in East Hill (1 mile north-east), Knatts Valley (1 mile east), Woodlands (1 mile south-east), Cotman's Ash (1 mile south-east) and Kemsing (2 miles south). Further out, we also cover Maidstone (14 miles east), Dartford (8 miles north), Sevenoaks (4 miles south-west), Royal Tunbridge Wells (14 miles south), Gravesend (10 miles north-east) and Tonbridge (9 miles south).
Local landmarks in Romney Street
Around Romney Street, our work takes us to homes and buildings near Kemsing Down and the streets around them. For rail, the closest station is Shoreham (Kent) station, about 1.6 miles west. Well-known places in the area include Otford Heritage Centre (2.1 miles south-west) and Kemsing Castle Bank (1.7 miles south).
External mastic in Romney Street
We’re ARBOMaster approved applicators, and each external joint gets a sealant suited to it. Some surfaces need a primer before sealing, and we don’t skip that step. Common call-outs are for joints with sealant missing in places and moss and dirt in joints with no sealant left, on brickwork movement joints, joints between brick and frames and concrete & block.
Around Romney Street, older buildings can be stone, brick or timber-framed, many with extensions added later. Where one material meets another is where water generally gets in, and they need the right sealant at the right depth.
All our work comes with a one-year guarantee, wherever you are in Kent.
- Place
- Romney Street (TN15)
- Wider area
- Kent
- Cover
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Work for landlords, hotels and businesses
We also work for property managers and facilities teams in Romney Street and across Kent. Several sites can go on one quote.
In hotels, rooms out of use cost money, so we plan the work room by room. We’ve worked in hotels as well as homes and businesses.
Towns and villages near Romney Street
Also in Romney Street
Looking after it afterwards
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Keep high-pressure jets off the joints
- Keep soil, plants and ivy away from the joints
- Keep water from gutters off the wall
- Check external joints each spring
Avoid pressure-washing straight into the joints. High-pressure water can lift the edges.
Gaps, plants or missing sealant in a joint are worth getting looked at. Earlier resealing means a smaller job and a better result.
Leave it or put it right?
Resealing a run of joints in one go is usually better than patching one at a time. They’ve weathered the same way, and access only has to be arranged once. Where a wall is exposed, as many are in small places like Romney Street, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Instead of a standard rate, we price the job in front of us: the amount of work, the old material and the access. The price is agreed before we begin.
Why Romney Street customers choose us
- White, clear, grey or coloured to suit, where the product allows
- Colour picked to suit the job
- Fully insured
- Over 20 years’ experience
Read our cost guide or our reviews.
The process
There’s no need to move everything out, just the space around the work. Everything nearby is protected, and the job takes a few hours to a few days, depending on the length of joint and the access in most cases. For a village or hamlet like Romney Street, the journey is planned in advance: 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 look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- We prime the faces where required.
- We gun in low-modulus sealant and tool it neatly.
How to prepare
- Tell us about any water getting in
- Let us know about earlier repairs to the joints
- Move anything stored near the joints
Ask for a quote
There’s no standard price list, because every job is different. Instead, your job gets its own clear quote. To arrange one, ring 0345 464 0079 or send us an email.
Advice
Romney Street: your questions answered
Do you cover smaller places like Romney Street?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Can you help a landlord with a rental near Shoreham (Kent) station?
Yes. We work for landlords and agents as well as householders, and several properties can go on one quote. You can phone 0345 464 0079 or send us an email with the details for a clear quote.
Are you fully insured?
Yes. We’re fully insured.
Do you do commercial work?
Yes. We’ve worked for hotels, offices and other businesses.
Can a movement joint be filled with mortar?
No. Cement or mortar cannot stretch, so the joint stops doing its job. Where a joint has been mortared, it can often be raked out and sealed properly.
When will the joints need doing again?
It depends on the exposure, the movement and the product. Sealant is a maintenance item, so check the joints once a year.
What colours does the sealant come in?
We aim for a joint that suits the wall rather than one that jumps out. Colour is agreed with you before we begin from the range available.
Should I try DIY first?
Sometimes. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
DIY versus a professional finish
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
What sealant work can’t fix
Sealant is not the answer to every problem, and we’d rather say so up front. Sealant won’t put right:
- Cracked brickwork or render that needs a builder or plasterer
- Structural movement, which needs a surveyor or engineer
- Adding movement joints to masonry that has none
Not sure which it is? You can phone 0345 464 0079 or send us an email and we will tell you honestly before you book.
Surfaces we seal
- Brickwork movement joints
- Joints between brick and frames
- Copings & trims
- Concrete & block
- Façade panels
- Render & cladding joints
How the job changes by surface
Cladding and façade panels
If the façade has a specified sealant, that’s what we use or an approved alternative. Tell us what the building has when you get in touch.
Copings and trims
Coping joints that leak let water straight down into the wall. Resealing them is a small job that protects a lot.