Wokingham · England
External & façade joints in California, Wokingham
Sealing brickwork movement joints, render, cladding and façade joints for California, backed by a one-year guarantee. Call for a quick quote.
- Weathered mastic that no longer stretches
- Weeds or debris growing in open joints
- Failed sealant between panels on a façade
About our external mastic in California
External mastic is a job where short cuts show quickly. New sealant over old, joints packed with mortar and beads with no backing rarely last long. We strip the joint back and start again. Typical jobs include old sealant gone brittle and cracked and rain getting behind render or cladding at a joint, on render & cladding joints, façade panels and copings & trims.
Around California, 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.
Whatever the size of the job, it’s backed by our 12-month guarantee in California and across Wokingham.
- Where
- California (RG40)
- Wider area
- Wokingham
- Cover
- 12 months on all our work
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
DIY versus a professional finish
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
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, then guaranteed for a year.
What the job involves on each surface
Joints between dissimilar materials
Different materials may need different primers. We prepare both faces so the sealant bonds properly.
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.
Questions from California
Can you help a landlord with a rental near Crowthorne station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can call 0345 464 0079 or email us with the details for a clear quote.
Will you come out to California?
Yes. California 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.
Is the work guaranteed?
Yes, for a year. If anything is not right with the work within the year, let us know and we’ll sort it.
What do you put in the joint?
Quality sealants from brands including Arbo and Everbuild, picked for each joint. We explain the product when we quote.
Does someone need to be in?
We need access to the joints, so we will agree that with you when we book. Indoors, that usually means someone at home.
Do you have insurance?
Yes. We are fully insured for domestic and commercial work.
What information do you need?
Where the job is, what the problem is and roughly how big it is. If you can, email a few pictures.
Can you reach joints on upper floors?
It depends on the building. Tell us the height, the number of joints and what’s below them, and we’ll confirm what access is needed.
California buildings and the weather
The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Managing a site like Gorse Ride Junior School? Then movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. For landlords with property near Crowthorne station, split movement joints are easy to miss on a rental until damp shows inside.
California is about 3 miles south-west of Wokingham, in Wokingham. Every kind of property in California can book us for external mastic, old or new, large or small. The work is guaranteed for a year. Across Wokingham, we cover 35 places, and California is one of them. Reading is on our list too, around 7 miles away.
Work in RG40 works the same way as everywhere else we cover. That includes homes and businesses on Warren Lane, White Horse Lane and Fernbank. Nearby, we also carry out external mastic in Arborfield Garrison (1 mile west), Finchampstead (1 mile south-east), Barkham (1 mile north), Langley Common (1 mile north-west) and Eversley (1 mile south-west). Within a short drive, we also cover Reading (7 miles north-west), Wokingham (3 miles north-east), Woodley (5 miles north), Earley (5 miles north-west), Crowthorne (3 miles east) and Lower Earley (4 miles north-west).
Near you in California
Around California, our work takes us to homes and buildings near The Queen's Oak pub, Bohunt School Wokingham and Shepperlands Farm Nature Reserve. The closest station to California is Crowthorne station, about 2.4 miles east of the centre. Nearby you’ll also find Beaumys Castle (4.7 miles west) and Wokingham Hospital (2.6 miles north-east). For a walk, there’s Horseshoe Lake and Holt Copse & Joel Park.
How to look after the new joints
Looking after new joints is easy, and it makes a real difference:
- Ask before painting over external sealant
- Keep water from gutters off the wall
- Make sure movement joints aren’t pointed over
- Point out the joints to other trades
Only paint over the joint if we have confirmed the sealant can take paint. Paint can crack on a flexible joint and spoil the finish.
Once a joint cannot move, the wall finds another way, often as cracks near the joint. Resealing it early helps prevent that.
Towns and villages near California
Other services in California
How it works
We keep the work tidy and contained to the joints we are treating, so you can carry on as normal. Expect the work to take anything from a few hours to several days, depending on the building, and we tell you how long to leave it before we go. Somewhere as small as California, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We start by checking each joint, agreeing the ones to redo and how we’ll reach them.
- We cut out the failed sealant and rake out any dirt or growth.
- The joint faces are cleaned and primed where the sealant needs it.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
Before we arrive
- Try not to wet indoor joints just before the visit
- Tell us about access, such as stairs, a lift or high-level joints
- Clear the area around the work
How to get a quote
Want a quote for external mastic? Please phone 0345 464 0079 or email us with a few details. You will know what we plan to do, and what it will cost, before any work begins.
Related advice
Signs you need external mastic in California
Every building moves. Clay bricks expand slightly over their life, concrete and block shrink, and everything moves with temperature and wet. All of that ends up in the joint sealant.
These are the problems we’re asked about most:
- Sealant that has lost its bond to the brick or render
- Leaking joints around cladding and façade panels
- Joints with sealant missing in places
- Damp patches traced to an open external joint
For an older house near a landmark such as Church of St James, an extension built onto an older house moves differently, and the joint between them takes the strain.
What your quote should include
- What guarantee comes with the work
- How hidden problems are handled
- Which colour the sealant will be
- Are they insured?
Leave it or put it right?
An open joint keeps letting water into the wall with every downpour. In cold weather, frost can damage wet brick and render near the open joint, so the problem grows beyond the joint itself. Around California, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
Rather than a set price list, we look at what your job involves: how many joints, what’s in them now and how we reach them. You’ll know the price before we begin.
What you get with us
- Experience in homes, commercial sites and hotels
- White, clear, grey or coloured to suit, where the product allows
- One-year guarantee on every job
- Sealant colour chosen to suit
What affects the cost of external mastic
Every job gets its own quote. This is what makes a difference:
- Mould in or behind the old joints
- The size of the job
- Whether old sealant or filler has to be cut out
- When we can work, for business premises
The cost reflects the work involved, not guesswork. That is why we ask a few questions first and send you a clear quote before work begins.
What we need to know
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- Whether it’s a home or a business
- Whether it has been sealed before
- The address or postcode of the job
- The rough size of the job
If you are in California and need external mastic, call 0345 464 0079 or email us. Tell us what the problem is and where, and you will get a clear quote before any work starts.