Buckinghamshire · England
External Mastic in Cadmore End
Problem with your movement joints in Cadmore End? We cut out the old, prepare the joints and apply the right sealant, with a one-year guarantee.
- Damp patches traced to an open external joint
- Leaking joints around cladding and façade panels
- Weeds or debris growing in open joints
External mastic in Cadmore End, done properly
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 work on joints between brick and frames, concrete & block and render & cladding joints, and people most often call us about plants rooting in failed movement joints and movement joints filled with mortar instead of sealant.
Older homes in small places like Cadmore End may be stone, brick or timber-framed, often with later extensions. The joints where those materials meet are the weak points, and they need the right sealant at the right depth.
All of our work is guaranteed for twelve months, and the guarantee is the same wherever you are.
- Place
- Cadmore End (HP14)
- Wider area
- Buckinghamshire
- Guarantee
- 12 months on all our work
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
What we’re called out for in Cadmore End
Some movement joints have been pointed up with mortar. With the joint locked solid, the movement turns into cracks elsewhere in the wall.
It’s worth asking for a quote if you see:
- Joints pointed up with cement by mistake
- Cracked joints where brick meets render or frames
- Water getting into walls through failed joints
- Sealant that has lost its bond to the brick or render
Schools such as Cadmore End CofE School are buildings too, and larger buildings have long runs of movement joint that eventually need resealing.
Before you book anyone
- Which sealant they’ll use, and why
- How long the guarantee is
- What insurance they hold
- How long to leave it before use
Places near Cadmore End
What else we do in Cadmore End
When it is not the sealant
Before booking, it’s worth knowing the limits too:
- Damp that is not coming from the joint
- Cracks in the bricks or render themselves, away from the joints
- Cutting new joints into brickwork, which is building work rather than sealant work
If you’re not sure, just phone 0345 464 0079 or send us an email and we will give you a straight answer before you book.
Where we work in Cadmore End
- Copings & trims
- Façade panels
- Render & cladding joints
- Concrete & block
- Joints between brick and frames
- Brickwork movement joints
Questions from Cadmore End
Can you help a landlord with a rental near Saunderton station?
Yes, we work for landlords and letting agents. Just phone 0345 464 0079 or drop us an email and tell us about the property, and we will give you a clear price.
Can you do external mastic in Cadmore End?
Yes. Our work covers London and the South East, and Cadmore End is part of that. Just call 0345 464 0079 or drop us an email with a few details of the job, and we’ll give you a clear price.
Can you match the colour of my brickwork?
There’s a good range of exterior colours, including greys, browns, whites and stone tones. We choose the closest to your brick or render so it does not stand out.
Do I have to be there?
For indoor joints, yes, someone needs to let us in. After that, you can carry on with your day.
Can you reach joints on upper floors?
That depends on how high the joints are and the ground below. Low-level joints are straightforward; for higher work, tell us about the building and we’ll confirm what’s needed.
What’s an expansion joint in brickwork?
It’s a deliberate gap that lets the wall expand and contract without cracking. It should be filled with flexible sealant, never mortar.
Do you seal joints where cladding meets other materials?
Yes. We cut out the old sealant, prepare both faces and reseal with a flexible exterior product. The colour is chosen to suit.
What do you need from me for a quote?
Where the job is, what the problem is and roughly how big it is. If you can, email a few pictures.
What the job involves on each surface
Render joints
The face of render can be soft, so a low-modulus sealant is kinder to the joint edges. Priming is done where the sealant calls for it.
Concrete and blockwork
Blockwork and concrete shrink over time and move with the seasons. Their movement joints are sealed over backing rod with a flexible sealant.
Walls and rooflines in Cadmore End
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. With historic houses such as West Wycombe Park House (about 2.8 miles east) nearby, there’s older building stock in the area around Cadmore End as well as newer homes. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material.
For landlords with property near Saunderton station, split movement joints are easy to miss on a rental until damp shows inside. For an older house near a landmark such as Church of St Mary Le Moor, the joints between older walls, newer extensions and the roofline need a sealant that can move.
Cadmore End is about 5 miles west of High Wycombe, in Buckinghamshire. For external mastic in and around Cadmore End, please phone 0345 464 0079 or drop us an email for a quick quote. We’re based in Crawley and cover Buckinghamshire, Cadmore End included. Across Buckinghamshire, we cover 263 places, Cadmore End among them. We also work in Reading, around 13 miles away.
Our applicators cover all of the HP14 postcode area for external mastic and the streets around it. If you are just outside Cadmore End, we cover Bolter End (1 mile east), Fingest (1 mile south-west), Wheeler End (1 mile east), Little Frieth (1 mile south) and Horsleys Green (1 mile north). Further out, we also cover Aylesbury (13 miles north), High Wycombe (5 miles east), Chesham (12 miles north-east), Marlow (5 miles south-east), Amersham (12 miles east) and Beaconsfield (9 miles east).
Near you in Cadmore End
Typical jobs here are in homes near The Peacock pub and the streets around them. For rail, the closest station is Saunderton station, about 3.8 miles north-east. Other landmarks nearby include Wycombe Hospital (4.8 miles east). The countryside around Cadmore End includes Bald Hill and Yoesden.
Why deal with it now?
An open joint keeps letting water into the wall with every downpour. Wet masonry is more easily damaged by frost near the open joint, so the damage spreads beyond the joint. Older cottages and farmhouses around Cadmore End can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
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’ll explain what it covers.
Why Cadmore End customers choose us
- A 12-month guarantee on all work
- Colour agreed with you before work begins
- White, clear, grey or another colour, product permitting
- Sealant colour chosen to suit
How the visit works
When we arrive, we look over the joints with you first. Surfaces next to the work are protected before work begins. Most jobs take a few hours for a handful of joints, longer for a whole elevation. Somewhere like Cadmore End needs a little journey planning: 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 start by checking each joint, agreeing the ones to redo and how we’ll reach them.
- Old sealant and any debris are cut and raked out.
- 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.
Preparing for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Clear items away from the joints we are working on
- Mention any parking rules near the property
Getting a quote
To get a quote, call 0345 464 0079 or email us with the location and a short description of the problem. You’ll have a clear quote before we start.
Advice
Should I try it myself first?
A DIY attempt doesn’t rule out a professional job. We cut it out and start again, so just mention it when you contact us.
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is.
Work for landlords, hotels and businesses
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements.
Landlords and agents in Cadmore End can book us as well as householders. Sealant work between tenants is a simple way to keep a property in good order.