South East England and London

External Mastic in Wokingham

Wherever you are in Wokingham, we can help with external mastic. A clear quote before we start, and a one-year guarantee.

Need external mastic in Wokingham?

Call 0345 464 0079

Get a quick quote

Towns we cover in Wokingham

Sealing brickwork movement joints, render, cladding and façade joints. Pick your town below to see the details for your area, and call or email us for a quick quote.

Main towns

External mastic in Wokingham: how it works

Low-level joints can normally be done from the ground. For joints higher up, give us some details of the building and we’ll confirm what access is needed. Typical jobs include leaking joints around cladding and façade panels and movement joints filled with mortar instead of sealant, on render & cladding joints, copings & trims and concrete & block.

At the end, we look at the finished work together and explain the cure time. The visit itself usually takes anything from a few hours to several days, depending on the building, depending on how much there is to do.

First we look over the joints with you, agree which to renew and talk through access.
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.

What affects the price in Wokingham

A few things move the cost up or down: how much old sealant there is and how stubborn it is, any mould to treat, and whether the work is at height. We take all of that into account in your quote.

Why choose Mr Mastic

White, clear, grey or coloured to suit, where the product allows
We never seal over old sealant
Sanitary silicone with an anti-fungal additive in wet areas
Arbo and Everbuild products

Getting a quote

Getting a quote is simple: let us know what needs doing and where. Photos by email help us understand the job, and we’ll come back to you with a quote.

What’s near Reading

In Reading, that means homes and buildings near Eurospeak Language School, University of Reading library and All Nations Christian Centre and the streets around them. You will also find Former Kennet Arms (less than half a mile east), Kendrick School (0.6 miles north-east), Coley Primary School (within half a mile north) and Eldon Square (0.9 miles east). The closest station to Reading is Reading West station, roughly 0.7 miles north-west. A little further out are The Oracle (within half a mile north-east) and Berkshire Medical Heritage Centre Museum (0.8 miles east). For a walk, there’s Sonning Hill and Longwater.

Walls and rooflines across Wokingham

Homes across Wokingham range from older brick and stone to modern render and cladding. Where two materials meet is where water usually gets in.

London and the South East have homes from every era, from period terraces to post-war new towns and new estates. The right sealant depends on the age and materials of the building, wherever it is in Wokingham.

Reading: For site and facilities teams at buildings such as Coley Primary School, larger buildings have long runs of movement joint that eventually need resealing. In the older streets around All Nations Christian Centre, older walls, gutters and the joints where extensions meet them need a flexible sealant.

When something else is needed

A few problems are outside what sealant work can do:

Cracking across the wall rather than at a joint
Loose or hollow render, which needs re-rendering
Damp that isn’t coming from the joint

DIY sealant or a professional job?

Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.

Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.

For landlords and businesses

We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we will quote.

From a single let to a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.

Why it fails

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.

Any of these means the joints need attention:

Damp patches traced to an open external joint
Sealant pulling away from one side of the joint
Plants rooting in failed movement joints
Joints pointed up with cement by mistake

How the job changes by surface

Concrete and blockwork

Big joints in concrete need careful depth control. Backing rod sized to the joint sets it.

Joints between dissimilar materials

Different materials may need different primers. Both surfaces are cleaned and primed as the product requires.

Questions from Wokingham

How long does external mastic last?

That varies with the weather the wall faces, how much it moves and the sealant used. Treat it as a maintenance item and look at it yearly.

How long does the job take?

It depends on the size of the job, but most jobs take a few hours for a handful of joints, longer for a whole elevation. We will tell you when we quote.

Where are you based?

We’re based in Crawley, West Sussex, and we cover South East England, London and all of Scotland.

What is a movement joint?

A movement joint is a planned break in the wall that absorbs expansion and shrinkage. It’s sealed with a flexible sealant, not mortar.

Do you seal joints where cladding meets other 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.

Can landlords and businesses book you?

Yes. We work in homes, commercial premises and hotels.

Can a movement joint be filled with mortar?

No. A mortar-filled joint can’t move, so the movement cracks the wall elsewhere. It needs a flexible sealant over backing rod.