Wokingham · England
Winnersh External Mastic
Our applicators work in Winnersh on sealing brickwork movement joints, render, cladding and façade joints. Old material cut out, joints cleaned and sealed neatly and a one-year guarantee.
- Rigid filler in a joint that should flex
- Old sealant gone brittle and cracked
- Gaps where render, brick and frames meet
About our external mastic in Winnersh
We are ARBOMaster approved applicators, and each external joint gets a sealant suited to it. Porous or awkward surfaces are primed where the sealant needs it. Typical jobs include movement joints with cracked, split or missing sealant and moss and dirt in joints with no sealant left, on joints between brick and frames, render & cladding joints and brickwork movement joints.
Homes around Winnersh range from older cottages to newer houses, with walls and rooflines of every type. Older gutters and trims need their joints resealed; newer brick and render need their movement joints kept sound.
Every job is covered by a one-year guarantee.
- Location
- Winnersh (RG41, RG10)
- Region
- Wokingham
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Your questions about external mastic in Winnersh
Can you help a landlord with a rental near Winnersh station?
Yes. We work for landlords and letting agents as well as homeowners, and several properties can go on one quote. You can ring 0345 464 0079 or drop us an email with the details for a clear quote.
Do you cover Winnersh for external mastic?
Yes, Winnersh is within the area we cover. We work across London and the South East. You can phone 0345 464 0079 or email us and let us know what needs doing, and we’ll send you a clear quote.
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 there be a smell?
It depends on the product. Some products have a noticeable smell, others very little.
Do you use backing rod?
Backing rod goes into deeper joints as a matter of course. It controls the depth and stops the sealant bonding to the back so the bead can stretch.
Can new sealant go over the old?
No, because it fails. The old sealant always comes out first, so the new joint bonds to clean surfaces.
Can I add another job to the visit?
Of course. Doing several areas at once is usually more efficient.
How often do external joints need resealing?
That depends on the wall, the weather and the movement. Signs to watch for are cracking, hardening and gaps at the edges, and reseal at that point.
What happens on the day
Once we are on site, we check the joints match what you told us. If we find something unexpected, we talk it through with you first. Most jobs then take a few hours for a handful of joints, longer for a whole elevation. Parking around Winnersh is generally easier than in a town centre, but mention any lanes, gates or long drives. For outside work, side access and the height of the joints help us plan.
- We start by checking each joint, agreeing the ones to redo and how we’ll reach them.
- The old mastic and anything lodged in the joint is removed.
- 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
- Mention if the joints have been sealed before
- Move anything stored near the joints
- For indoor joints, keep the area dry beforehand if you can
How to get a quote
We quote each job on its own, so the first step is telling us about yours. Simply call 0345 464 0079 or drop us an email and describe the job.
Related advice
Honest limits
It helps to know what we can’t do too:
- Movement that’s more than a sealant joint can take
- Failed render or damaged cladding panels
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
If you are not sure, just phone 0345 464 0079 or drop us an email and we will give you a straight answer before booking.
Joints and surfaces we work on
- Joints between brick and frames
- Copings & trims
- Render & cladding joints
- Concrete & block
- Façade panels
- Brickwork movement joints
Surface by surface
Concrete and blockwork
Concrete and block walls shrink as they dry and move with temperature. We reseal their joints with backing rod and a flexible product.
Render joints
The face of render can be soft, so a low-modulus sealant is kinder to the joint edges. We prime where the product needs it.
Signs you need external mastic in Winnersh
Poor preparation causes many early failures: dusty or wet faces, no primer where one was needed, or old sealant left in. The new sealant then lets go long before it should.
Signs it’s time to call us include:
- Rain getting behind render or cladding at a joint
- Failed seals between different materials
- Hard, crazed mastic that has stopped moving
- Sealant that has lost its bond to the brick or render
Schools such as The Forest School are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Before you book anyone
- Is VAT in the price?
- What happens if the job turns out different
- How the colour is chosen
- Whether they’re fully insured
What external mastic looks like in Winnersh
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.
Homes close to St Mary the Virgin include some older properties, and an extension built onto an older house moves differently, and the joint between them takes the strain. Rented homes near Winnersh station change hands often, and split movement joints are easy to miss on a rental until damp shows inside.
Winnersh is about 2 miles south of Woodley, in Wokingham. Jobs in Winnersh get the same care as everywhere else we work: old sealant removed completely, careful preparation and a one-year guarantee. Our Wokingham coverage runs to 35 places, and Winnersh is one of them.
Work in RG41 and RG10 works the same way as everywhere else we cover. If you need external mastic at a property on Reading Road, Westbrook Court and Bathurst Road or a nearby road, we can help. You will find Winnersh on the B3030, so it’s easy for us to get to. We also cover the places around Winnersh: Sindlesham (1 mile south), Emmbrook (1 mile south-east), Woosehill (2 miles south-east), Woodley (2 miles north) and Wokingham (2 miles south-east). We also work in nearby towns such as Reading (4 miles west), Crowthorne (5 miles south-east), Newtown (3 miles north-west), Coley Park (5 miles west), Twyford (3 miles north) and Charvil (3 miles north). Winnersh is one of the larger places we cover in Wokingham.
Near you in Winnersh
In Winnersh, that means homes and buildings near The Poachers pub, Maiden Erlegh Local Nature Reserve and Winnersh Primary School. Winnersh has its own railway station: Winnersh station. Well-known places in the area include Berkshire Library & Museum of Freemasonry (0.6 miles south-west) and Wokingham Hospital (2.1 miles south-east). Not far away are Lavells Lake and South Lake.
Landlord and commercial work in Winnersh
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a one-year guarantee.
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements.
Why act early in Winnersh
Running new sealant over the old bead rarely lasts. The new layer can’t bond properly to old, weathered material, so we always take the old sealant out. In a smaller place like Winnersh, wherever a wall is exposed, a failed outside joint is a real source of damp. Indoors, a failed seal lets water into floors and panels as it would anywhere.
Homes and businesses are quoted the same way: the amount of work, how we reach it and what it needs, along with when we can work on site. Ask us for a quote and we will explain what it covers.
Why Winnersh customers choose us
- A 12-month guarantee on all work
- Fully insured
- Colour agreed with you before any work starts
- More than 20 years in sealant work
Read what affects the cost and our reviews.
DIY sealant or a professional job?
If you’ve already had a go yourself, that is fine. We cut it out and start again, so tell us about it when you ask for a quote.
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.