Buckinghamshire · England
Ibstone External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for Ibstone, backed by a one-year guarantee. Call for a quick quote.
- Plants rooting in failed movement joints
- Joints where the bead has come unstuck
- Damp patches traced to an open external joint
How we handle external mastic in Ibstone
As ARBOMaster approved applicators, we choose exterior sealants to suit the joint and the surfaces. Porous or awkward surfaces are primed where the sealant needs it. If you’re dealing with joints pointed up with cement by mistake and joints with sealant missing in places, we can put it right, on concrete & block, render & cladding joints and copings & trims alike.
Somewhere as small as Ibstone, homes and farm buildings often face open ground, where walls and rooflines take the weather head on. Joints on those walls need a sealant that moves with the building and stays in place.
A one-year guarantee comes with the work, just as it does everywhere we cover.
- Location
- Ibstone (HP14)
- Region
- Buckinghamshire
- Guarantee
- One year on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
What the job involves on each surface
Brickwork movement joints
Brick movement joints are often mistaken for a missing mortar line. If that’s happened, we rake it out and reseal it properly if the joint can be cleared.
Render joints
Rendered walls have joints at beads, openings and changes of material. We reseal them with a flexible exterior sealant that suits the render colour.
Keeping the joints in good condition
How long the joints last depends on use and care. We suggest:
- Leave the joints unpainted unless we have said otherwise
- Deal with leaking gutters that soak the joints below
- Get split or bare joints resealed while the damage is small
- Look over the joints every year, ideally after winter
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.
Leave a failed movement joint and water keeps getting into the wall. That can lead to damp patches, staining and frost damage.
Honest limits
Sealant isn’t the answer to every problem, and we’d rather say so up front. It will not solve:
- Cracked brickwork or render that needs a builder or plasterer
- Subsidence or other structural problems
- Render that’s blown, hollow or coming away
Not sure which it is? You can call 0345 464 0079 or email us and we’ll tell you honestly.
What we seal
- Copings & trims
- Concrete & block
- Brickwork movement joints
- Façade panels
- Render & cladding joints
- Joints between brick and frames
What happens if it’s left?
Sealing over the top of old mastic does not hold for long. New sealant doesn’t bond well to old, weathered sealant, so we always take the old sealant out. Older cottages and farmhouses around Ibstone can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
Doing several joints on one visit is usually more efficient than separate visits, so tell us about everything that needs sealing. You’ll get one clear quote for the whole job.
What you get with us
- Anti-fungal sanitary silicone in wet areas
- 4.9 on Google from 180+ five-star reviews
- 20+ years of sealant experience
- A 12-month guarantee on all work
Take a look at how sealant jobs are priced or what customers say.
What external mastic looks like in Ibstone
With historic houses such as Stonor Park (about 3 miles south) nearby, there’s older building stock in the area around Ibstone as well as newer homes. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material. The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Managing a site like Ibstone CofE Primary School? Then its movement joints, gutters and trims need looking after like any other building’s. In the older streets around Church of St Nicholas, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Ibstone is about 7 miles west of High Wycombe, in Buckinghamshire. Every kind of property in Ibstone is covered for external mastic. The work is guaranteed for a year. Across Buckinghamshire, we cover 263 places, and Ibstone is one of them. Reading is on our list too, about 13 miles from Ibstone.
Here we cover the HP14 postcode area for external mastic. Close by, we work in Northend (1 mile south-west), Turville Heath (2 miles south), Christmas Common (2 miles west), Stonor (3 miles south) and Crowell Hill (3 miles north). Further out, we also cover Aylesbury (13 miles north), High Wycombe (7 miles east), Chesham (14 miles east), Marlow (8 miles south-east), Amersham (14 miles east) and Beaconsfield (12 miles east).
Near you in Ibstone
In Ibstone, that means homes and buildings near The Fox pub. Ibstone’s nearest station is Saunderton station, roughly 4.6 miles north-east. Open spaces near Ibstone include Bald Hill and Aston Rowant NNR.
The process
You don’t need to clear the whole room or building before we come, only the area right around the joints. We protect the rest, and the job takes a few hours to a few days, depending on the length of joint and the access in most cases. In a small place like Ibstone, access is usually the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- The old mastic and anything lodged in the joint is removed.
- 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.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
How to prepare
- Tell us about any previous sealing or DIY attempts
- For business premises, tell us about site rules or sign-in
- Let us know about parking restrictions
Ask for a quote
Getting a quote is simple: let us know what needs doing and where. A few pictures by email make the job easier to understand, and we will come back to you with a quote.
Read more
Questions from Ibstone
Will you come out to Ibstone?
Yes. Ibstone is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Do you work for landlords with property near Saunderton station?
Yes, we work for landlords and letting agents. Just ring 0345 464 0079 or drop us an email and tell us about the property, and we’ll give you a clear quote.
Can I do it myself?
That depends on the joint. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.
Is there any odour?
It depends on the product. Some smell for a while, some hardly at all.
What colours does the sealant come in?
The sealant colour is picked to suit the wall so the joint blends in. There’s a wide choice of exterior colours.
Do you seal joints where cladding meets other materials?
Yes. Where different materials meet is one of the most common joints we seal. The sealant is chosen to bond to both sides with primer where required.
What is a movement joint?
It’s a deliberate gap that lets the wall expand and contract without cracking. It should be filled with flexible sealant, never mortar.
How long does external mastic last?
It varies with how exposed the wall is and how much the joint moves. Look for splits, hardening or edges coming away and have them redone then.
Places near Ibstone
More services for Ibstone
Common problems we fix in Ibstone
Using the wrong sealant is another common reason. A high-modulus or general-purpose sealant can be too rigid for a busy joint, and it tears off the sides.
Most people get in touch after spotting one of these:
- Rain getting behind render or cladding at a joint
- Weathered mastic that no longer stretches
- Failed sealant between panels on a façade
- Sealant that has lost its bond to the brick or render
Letting a property close to Saunderton station? Then outside joints that have cracked can let damp into a rental, so check them between lets.
Comparing quotes
- How the joint is cleaned and prepared
- Whether they’re fully insured
- When the joint can take water or movement
- Is VAT in the price?
DIY versus a professional finish
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly, so tell us about it when you ask for a quote.
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.