West Berkshire · England
External Mastic in East Garston
Sealing brickwork movement joints, render, cladding and façade joints for homeowners, landlords and businesses in East Garston. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Failed sealant between panels on a façade
- Water getting into walls through failed joints
- Brick movement joints where the sealant has split
External mastic in East Garston, done properly
Failed sealant is cut out, the depth set with closed-cell backing rod, and the joint resealed with a low-modulus sealant made for outside. We pick a colour that sits well with the wall. We work on concrete & block, brickwork movement joints and render & cladding joints, and common reasons people get in touch are weathered mastic that no longer stretches and movement joints filled with mortar instead of sealant.
Outside joints can only be sealed when they’re dry, so work in East Garston is booked around the forecast. Tell us about access to all sides of the building, including outbuildings and garages.
A one-year guarantee comes as standard, so you’re covered after we’ve gone.
- Location
- East Garston (RG17)
- Wider area
- West Berkshire
- Guarantee
- 12 months on all our work
- Price
- A clear price before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
When it is not the sealant
A few problems are outside what sealant work can do:
- Adding movement joints to masonry that has none
- Loose or hollow render, which needs re-rendering
- Movement that is more than a sealant joint can take
If in doubt, call 0345 464 0079 or drop us an email and we’ll say what we think before booking.
Surfaces we seal
- Copings & trims
- Façade panels
- Concrete & block
- Joints between brick and frames
- Render & cladding joints
- Brickwork movement joints
Landlord and commercial work in East Garston
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. Several properties can be quoted together.
If you manage several properties in or around East Garston, jobs at different addresses can be quoted together. Send us the addresses and the work at each, and pictures by email help.
Common problems we fix in East Garston
Sometimes a movement joint was filled with mortar or a rigid filler. The joint cannot move, so the wall cracks somewhere else instead.
Signs it’s time to call us include:
- Movement joints with cracked, split or missing sealant
- Cracked joints where brick meets render or frames
- Damp patches traced to an open external joint
- Joints pointed up with cement by mistake
Around East Garston, as everywhere, external mastic is only as good as the preparation behind it.
What your quote should include
- What the cure time is
- Whether they seal over old material or remove it
- Whether they’re fully insured
- How hidden problems are handled
Surface by surface
Brickwork movement joints
People sometimes point up a brick movement joint by mistake. Where one has been mortared, we cut it out and reseal it with sealant if the joint can be cleared.
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.
What we do, step by step
Every visit runs the same way: we check the joints, mask and protect the surrounding surfaces, carry out the job and tidy away. Most jobs take a few hours to a few days, depending on the length of joint and the access. Somewhere like East Garston needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- We start by checking each joint, agreeing the ones to redo and how we will reach them.
- The old mastic and anything lodged in the joint is removed.
- Both sides are cleaned back to sound material and primed if needed.
- 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
- Where the joints are inside, avoid wetting them before we arrive
- Keep children and pets away from the work area
- Mention any sign-in or site rules at work premises
Ask for a quote
Call for a quick quote, or email us if that is easier. Describe what needs sealing and we’ll explain what’s involved.
Related advice
Towns and villages near East Garston
What else we do in East Garston
Can I do it myself?
If you’re set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
Why act early in East Garston
The longer a joint stays open, the more water the wall takes in. In cold weather, frost can damage wet brick and render near the open joint, so the damage spreads beyond the joint. Around East Garston, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
What it costs depends on the size of the job, how hard the old material is to remove and access to the work. We give a clear quote before work begins, so you know where you stand.
Why us?
- Fully insured
- We leave the area clean and tidy
- Anti-fungal silicone where joints get wet
- White, clear, grey or coloured to suit, where the product allows
Take a look at how sealant jobs are priced and our reviews.
What external mastic looks like in East Garston
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
In the older streets around Church of All Saints, older walls, gutters and the joints where extensions meet them need a flexible sealant.
East Garston is about 7 miles south of Wantage, in West Berkshire. Jobs in East Garston get the same care as everywhere else we work: old sealant removed completely, careful preparation and a one-year guarantee. Across West Berkshire, we cover 155 places, and East Garston is one of them. There’s also a page for Oxford, about 21 miles away.
We cover every part of the RG17 postcode area for external mastic and the streets around it. If you need external mastic at a property on Station Road, Back Street and Humphrey's Lane or a nearby road, we can help. Neighbouring places we cover for external mastic include Eastbury (1 mile west), East Garston Woodlands (1 mile south-west), Great Shefford (2 miles south-east), East Shefford (2 miles south-east) and Shefford Woodlands (2 miles south). Within a short drive, we also cover Newbury (9 miles south-east), Thatcham (11 miles south-east), Speenhamland (9 miles south-east), Hungerford (6 miles south), Lambourn (3 miles north-west) and Shaw (9 miles south-east).
Near you in East Garston
The countryside around East Garston includes Watts Bank.
East Garston questions
Do you cover smaller places like East Garston?
Yes. East Garston is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
What guarantee comes with external mastic in East Garston?
Every job comes with our 12-month guarantee, wherever it is. We are also fully insured and ARBOMaster approved.
What should I tell you?
Let us know what needs doing and where. If we need more, we will ask.
Do you seal joints where cladding meets other materials?
Yes. Joints between dissimilar materials are a big part of external work. We use a flexible sealant suited to both surfaces, primed where needed.
Do you work for landlords and businesses?
Yes. We work for householders, landlords, letting agents, businesses and hotels in East Garston.
What colours does the sealant come in?
We choose a sealant colour to suit the brick, stone or render so the joint blends in. Exterior sealants come in a good range of colours.
Why is there a gap in my brick wall?
A vertical gap in a long brick wall is normally a movement joint. It gives the wall room to move, and it should be sealed with a flexible sealant.
How long does external mastic last?
It varies from wall to wall: joints on exposed walls or with a lot of movement age sooner. Check them each year and reseal when they split or harden. Every job carries our 12-month guarantee.