Reading · England
External Mastic in Green Park
We cover Green Park for sealing brickwork movement joints, render, cladding and façade joints. Old material cut out, joints cleaned and sealed neatly and every job guaranteed for a year.
- Brick movement joints where the sealant has split
- Rain getting behind render or cladding at a joint
- Joints where the bead has come unstuck
External mastic in Green Park
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 where mortar or filler would crack. If you have panel joints letting water in and joints pointed up with cement by mistake, we can put it right, on concrete & block, render & cladding joints and brickwork movement joints alike.
Older homes in small places like Green Park may be stone, brick or timber-framed, often with later extensions. The joints where those materials meet are the weak points.
The work is guaranteed for twelve months. If something is not right with it in that time, tell us and we’ll put it right.
- Where
- Green Park (RG2, RG30, RG7)
- Wider area
- Reading
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Your questions about external mastic in Green Park
Do you cover Green Park for external mastic?
Yes, Green Park is within the area we cover. Our work covers London and the South East. You can phone 0345 464 0079 or drop us an email and tell us what needs doing, and we will give you a clear price.
Do you cover smaller places like Green Park?
Yes. Green Park is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Will it make a mess?
We keep the work tidy. We protect what’s around the joints, and the area is left clean when we finish.
Are you ARBOMaster approved?
Yes. We hold ARBOMaster approved applicator status.
How much does external mastic cost in Green Park?
Every job is different, so each one gets its own quote. To get one, phone 0345 464 0079 or email us with a short description of the job.
How long does the job take?
That depends on the amount of work, but most jobs take a few hours for a handful of joints, longer for a whole elevation. We’ll tell you when we quote.
What should I tell you?
Where the job is, what the problem is and roughly how big it is. Photos by email help too.
When is the sealant fully cured?
Cure times vary by product and the conditions. We tell you how long to leave it before we go.
What the job involves on each surface
Copings and trims
Coping and trim joints face rain and sun head on. We reseal them with an exterior sealant suited to the material.
Cladding and façade panels
Panel systems often rely on sealant between and around the panels. We reseal them with a sealant suited to the panel material.
Landlord and commercial work in Green Park
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance that we can handle for you.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
The process
On the day, there’s very little for you to do. Point us to the joints and we’ll get on with it. The job generally takes a few hours for a handful of joints, longer for a whole elevation from start to finish. In a small place like Green Park, access is generally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- Each joint is checked and the colour of the new sealant agreed.
- We take out the old sealant until the faces are sound.
- Backing rod goes in so the sealant can stretch between the two faces.
- We prime the faces where required.
- We gun in low-modulus sealant and tool it neatly.
Before we arrive
- On commercial sites, let us know about site rules
- Mention any tricky access
- Keep children and pets away from the work area
Ask for a quote
There’s no standard price list, because every job is different. Instead, your job gets its own clear quote. To get started, call 0345 464 0079 or send us an email.
Advice
What affects the cost of external mastic
Jobs vary more than people expect. The main factors:
- The number of rooms or windows
- Any mould that needs treating
- How much there is to do
- How easy the joints are to reach
A failed joint rarely gets cheaper to fix by waiting. If you are not sure whether it needs doing, phone 0345 464 0079 or drop us an email and we will give you an honest view and a quote.
What we need to know
There’s no need for technical detail. It helps if you can tell us:
- Where the job is, and your postcode
- A few photos by email, if you can
- How we’d reach the joints
- Whether it’s a home or a business
To get a quote, phone 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. You will have a clear quote before we start.
Signs you need external mastic in Green Park
Using the wrong sealant is another common reason. A high-modulus or general-purpose sealant can be too rigid for a busy joint, so it pulls away from the edges.
These are the problems we are asked about most:
- Moss and dirt in joints with no sealant left
- Joints pointed up with cement by mistake
- Rain getting behind render or cladding at a joint
- Panel joints letting water in
For an older house near a landmark such as St Paul's Church, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
What to look for in a quote
- Is VAT in the price?
- When the joint can take water or movement
- Whether all the old sealant comes out first
- What guarantee comes with the work
When it is not the sealant
In fairness, some problems need a different trade:
- Cracked brickwork or render that needs a builder or plasterer
- Loose or hollow render, which needs re-rendering
- Structural movement, which needs a surveyor or engineer
If in doubt, call 0345 464 0079 or email us and we will say what we think.
Surfaces we seal
- Brickwork movement joints
- Façade panels
- Concrete & block
- Copings & trims
- Render & cladding joints
- Joints between brick and frames
Towns and villages near Green Park
More services for Green Park
Walls and rooflines in Green Park
With historic houses such as Mapledurham House (about 4.6 miles north-west) nearby, there’s older building stock in the area around Green Park as well as newer homes. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth. 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.
Schools such as Whitley Park Primary and Nursery School are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. Rented homes near Reading Green Park station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets.
Green Park is about 2 miles south of Reading, in Reading. Green Park gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a 12-month guarantee. We cover 34 towns and villages across Reading.
Work in RG2, RG30 and RG7 works the same way as everywhere else we cover. External mastic is available to properties on Sunapee Road, Flagstaff Road and Longwater Avenue. If you are just outside Green Park, we cover Great Lea Common (1 mile south-east), Whitley (1 mile east), Whitley Wood (1 mile south-east), Coley Park (1 mile north) and Three Mile Cross (2 miles south-east). We also work in nearby towns such as Caversham (4 miles north), Norcot (3 miles north-west), Tilehurst Within (3 miles north-west), Arborfield Garrison (5 miles south-east), Caversham Heights (4 miles north) and Sonning Common (6 miles north).
Near you in Green Park
Typical jobs here are in homes near John Madejski Academy, among other places. The closest station to Green Park is Reading Green Park station, roughly 0.5 miles west. Other landmarks nearby include The Oracle (2.2 miles north) and Beaumys Castle (3.4 miles south). Open spaces near Green Park include Sonning Hill and Longwater.
Should I try it myself first?
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.