Reading · England
Chalkhouse Green External Mastic
Specialist external mastic for Chalkhouse Green: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Moss and dirt in joints with no sealant left
- Joints where the bead has come unstuck
- Leaking joints around cladding and façade panels
External mastic in Chalkhouse Green, done properly
Joints between dissimilar materials, like brick against render or concrete against a steel frame, see movement from both sides. A flexible exterior sealant takes up that movement. We work on brickwork movement joints, concrete & block and copings & trims, and people most often call us about joints pointed up with cement by mistake and failed sealant between panels on a façade.
Around Chalkhouse Green, older buildings can be stone, brick or timber-framed, many with extensions added later. The joints where those materials meet are the weak points.
Whatever the size of the job, it’s backed by our 12-month guarantee.
- Where
- Chalkhouse Green (RG4)
- Region
- Reading
- Guarantee
- One year on every job
- Quote
- A clear price before we start
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
What sealant work can’t fix
New sealant can’t fix everything, and we’d rather say so up front. Sealant won’t put right:
- Loose or hollow render, which needs re-rendering
- Rising or penetrating damp from elsewhere in the wall
- Subsidence or other structural problems
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we will tell you honestly before booking.
Joints and surfaces we work on
- Façade panels
- Joints between brick and frames
- Render & cladding joints
- Concrete & block
- Copings & trims
- Brickwork movement joints
Also near Chalkhouse Green
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What we do, step by step
There’s no need to move everything out, just the space around the work. Everything nearby is protected, and the work takes a few hours to a few days, depending on the length of joint and the access for a typical job. For a village or hamlet like Chalkhouse Green, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- First, the joints are inspected and the access agreed.
- Every bit of old sealant and any mortar or debris is cut out.
- The faces are brushed clean and primed where the product requires it.
- We fit closed-cell backing rod to control the depth.
- The exterior sealant is applied, tooled and checked along its length.
How to prepare
- Let us know about parking restrictions
- Clear items away from the joints we are working on
- Where the joints are inside, avoid wetting them before we arrive
Ask for a quote
For external mastic in Chalkhouse Green, ring 0345 464 0079 or send us an email. Tell us what the problem is and where, and you will get a clear quote before any work starts.
Related advice
Should I try it myself first?
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
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.
Landlord and commercial work in Chalkhouse Green
Whether it’s one flat or a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
Surface by surface
Copings and trims
Coping joints that leak let water straight down into the wall. Sealing them early saves the wall below.
Cladding and façade panels
If the façade has a specified sealant, that is what we use, or one the system allows. Send us any details you have about the façade.
What external mastic looks like in Chalkhouse Green
With historic houses such as Mapledurham House (about 2.6 miles west) nearby, there’s older building stock in the area around Chalkhouse Green 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. London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
In the older streets around Saint Barnabas Emmer Green, the joints between older walls, newer extensions and the roofline need a sealant that can move. Schools such as Emmer Green Primary School are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Chalkhouse Green is about 1 mile north-west of Caversham, in Reading. We provide external mastic to homes and businesses in Chalkhouse Green, as part of our work across Reading. Chalkhouse Green is one of 34 places in Reading where we work for external mastic.
Work in RG4 works the same way as everywhere else we cover. Local streets include Kidmore End Road, Chalkhouse Green Lane and Tanners Lane. Close by, we work in Tokers Green (1 mile south-west), Emmer Green (1 mile south-east), Caversham (1 mile south-east), Caversham Heights (1 mile south) and Caversham Park Village (2 miles south-east). Within a short drive, we also cover Norcot (3 miles south-west), West Reading (3 miles south), Tilehurst Within (4 miles south-west), Shinfield (6 miles south), Arborfield Garrison (9 miles south-east) and Horncastle (4 miles south-west).
Near you in Chalkhouse Green
Typical jobs here are in homes near Bird in Hand pub, The Warwick School and Highdown School and Sixth Form Centre and the streets around them. For rail, the closest station is Reading station, about 2.6 miles south of the centre. Other landmarks nearby include Royal Berkshire Regiment Museum (2.9 miles south) and Battle Hospital (2.8 miles south). Open spaces near Chalkhouse Green include South Lake and Sonning Hill.
Why deal with it now?
Low-modulus sealants stretch easily, so they put less strain on the joint edges. That matters on brick, render and concrete, which can be weaker at the face. A stiffer product can damage the joint edge as it fails. Around Chalkhouse Green, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
The cost depends on how much there is to do, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before any work starts, so you know where you stand.
Why choose Mr Mastic in Chalkhouse Green
- We leave the area clean and tidy
- We are fully insured
- A 12-month guarantee on all work
- Trusted Arbo and Everbuild sealants
Common problems we fix in Chalkhouse Green
Weeds, moss and debris in a joint are a sign the sealant has gone. Dirt and roots then trap moisture in the joint and speed up the damage.
Common reasons people contact us are:
- Leaking joints around cladding and façade panels
- Joints pointed up with cement by mistake
- Old sealant gone brittle and cracked
- Damp patches traced to an open external joint
For landlords with property near Reading station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Questions to ask before you book
- Whether the sealant suits the joint
- The length of the guarantee
- What happens if the job turns out different
- Are they insured?
Common questions in Chalkhouse Green
Can you help a landlord with a rental near Reading station?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before work begins.
Will you come out to Chalkhouse Green?
Yes, Chalkhouse Green is covered. Our work covers London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
How long does the job take?
That depends on the amount of work, but most jobs take a few hours to a few days, depending on the length of joint and the access. We will tell you when we quote.
Is it messy?
Tidy work is part of the job. We protect what’s around the joints.
Do you remove the old sealant?
Yes. We cut out all the old sealant and clean the joint.
Can you seal joints between two different materials?
Yes. The old joint is removed, both surfaces cleaned and primed where needed, and a flexible sealant applied. The colour is chosen to suit.
Will the new joint stand out?
We choose a sealant colour to suit the brick, stone or render. There’s a wide choice of exterior colours.
Should I point up the gap in my brickwork?
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.