Kent · England
Colliers Green External Mastic
External mastic for Colliers Green, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Panel joints letting water in
- Water getting into walls through failed joints
- Joints pointed up with cement by mistake
How we handle external mastic in Colliers Green
Low-level joints can usually be done from the ground. For joints higher up, give us some details of the building and we’ll confirm what’s needed to reach them safely. If you have cracked joints where brick meets render or frames and sealant pulling away from one side of the joint, we can help, whatever the surface.
Around Colliers Green, 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.
You’re covered for a year from the day we finish. If there’s a problem with it, please ring 0345 464 0079 or email us.
- Location
- Colliers Green (TN17)
- Wider area
- Kent
- Guarantee
- One year on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
What sealant work can’t fix
It helps to know what we cannot do:
- Adding movement joints to masonry that has none
- Movement that is more than a sealant joint can take
- Cracks in the bricks or render themselves, away from the joints
If in doubt, call 0345 464 0079 or drop us an email and we’ll say what we think.
What we seal
- Render & cladding joints
- Joints between brick and frames
- Copings & trims
- Concrete & block
- Brickwork movement joints
- Façade panels
What we do, step by step
We keep the work tidy and contained to the joints we’re treating, so you can get on with your day. Expect the work to take a few hours to a few days, depending on the length of joint and the access. In a small place like Colliers Green, access is usually the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Backing rod goes in so the sealant can stretch between the two faces.
- Primer is applied wherever the sealant needs it.
- We gun in low-modulus sealant and tool it neatly.
How to prepare
- Mention any tricky access
- Plan for the work area to be out of bounds to pets and children
- Tell us about any water getting in
Ask for a quote
To get a quote, call 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. We will give you a clear quote before any work starts.
Advice
For landlords and businesses
In hotels, rooms out of use cost money, so we plan the work room by room around your bookings where we can. We have worked in hotels as well as homes and businesses.
We work for letting agents and landlords as well as householders. Sealant work between tenants keeps a property looking cared for.
External mastic in Colliers Green: local notes
Historic houses like Scotney Castle (about 4.9 miles south-west) are a reminder that the area around Colliers Green has older buildings as well as new. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth. Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Historic houses such as Scotney Castle, about 4.9 miles south-west, show how far back building around Colliers Green goes, and older homes nearby need a sealant that suits their walls. Letting a property close to Marden station? Then split movement joints are easy to miss on a rental until damp shows inside. For site and facilities teams at buildings such as Colliers Green Church of England Primary School, its movement joints, gutters and trims need looking after like any other building’s.
Colliers Green is about 7 miles south-east of Paddock Wood, in Kent. Homes, rented property, offices and hotels in Colliers Green can book us for external mastic, old or new, large or small. The work is guaranteed for a year. We cover 922 towns and villages across Kent. For nearby work, see our Crawley page, about 30 miles away.
Postcode districts we cover here for external mastic: TN17. We also cover the places around Colliers Green: Flishinghurst (1 mile south), Horden (1 mile north), Wilsley Green (2 miles south-east), Wilsley Pound (2 miles south-east) and Cranbrook Common (2 miles east). Within a short drive, we also cover Maidstone (10 miles north), Ashford (15 miles east), Royal Tunbridge Wells (11 miles west), Tonbridge (12 miles north-west), Kings Hill (11 miles north-west) and Foley Park (11 miles north).
Landmarks near Colliers Green
We work in homes and buildings around High Weald Academy and The Gill, among other places. For rail, the closest station is Marden station, about 3.9 miles north of the centre. Nearby you’ll also find Sissinghurst Castle (3 miles east) and Benenden Hospital (5.1 miles south-east).
FAQs for Colliers Green
I let a flat near Marden station. Can you help?
Yes, we work for landlords and agents. Just phone 0345 464 0079 or email us and tell us about the property, and we will give you a clear price.
Can you do external mastic in Colliers Green?
Yes. We work across London and the South East, and Colliers Green is part of that. Just ring 0345 464 0079 or drop us an email with a few details of the job.
Is it OK to fill a movement joint with cement?
No. Rigid materials can’t move with the wall, so the joint stops doing its job. Where a joint has been mortared, it can often be raked out and sealed properly.
Will it make a mess?
No. We protect the surfaces around the joints, and we clear up the old sealant and our materials before we leave.
Do you take out the old sealant first?
Yes. We cut out all the old sealant and clean the joint before applying anything new.
Can new sealant go over the old?
No. New silicone won’t bond to old silicone, and it traps any mould or water underneath. It all has to come out first.
Do you hold any approvals?
Yes. Mr Mastic is an ARBOMaster approved applicator, and we’re fully insured.
Is the work guaranteed?
Yes. Every job comes with a one-year guarantee.
Should I try it myself first?
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Also near Colliers Green
Other services in Colliers Green
Aftercare tips
How long the joints last depends on use and care. We suggest:
- Show decorators and builders where the movement joints are
- Leave the joints unpainted unless we have said otherwise
- Clear growth from the base of walls and joints
- Avoid pressure-washing directly into sealant joints
Give the sealant the cure time we tell you before anything rubs against it. The surface skins over quickly, but full cure takes longer.
Once a joint can’t move, the wall finds another way, often as cracks near the joint. Resealing it early helps prevent that.
Surface by surface
Brickwork movement joints
People sometimes point up a brick movement joint by mistake. Where one has been mortared, we cut it out and reseal it with sealant.
Cladding and façade panels
Where a cladding system has its own specified sealant, we follow it, or one the system allows. Send us any details you have about the façade.
What affects the quote in Colliers Green
There’s no set price list, because no two jobs are the same. The quote depends on:
- Access and height
- How many rooms, windows or areas are involved
- Mould in or behind the old joints
- Any working-time requirements on site
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs, plus any working-time requirements on site. Call for a quick quote and we will go through it with you.
What we need to know
Photos help, but a description is a good start. Please mention:
- Access, such as stairs, a lift or height
- How many joints, rooms or windows are involved
- The problem you’ve noticed
- If someone has resealed it before
Want a quote for external mastic? Please phone 0345 464 0079 or drop us an email with a few details. We’ll explain what we’d do and send you a clear quote before work begins.