Reading · England
External & façade joints in Trash Green, Reading
Sealing brickwork movement joints, render, cladding and façade joints in Trash Green, with a 12-month guarantee on every job. Ask us for a quote.
- Moss and dirt in joints with no sealant left
- Joints with sealant missing in places
- Rain getting behind render or cladding at a joint
External mastic in Trash Green, done properly
Short cuts in external joints show up within a season or two. Overfilled joints, missing backing rod and sealant laid over old sealant rarely last long. We take the old material out and do it properly. We work on façade panels, joints between brick and frames and copings & trims, and people most often call us about moss and dirt in joints with no sealant left and failed seals between different materials.
External sealant needs dry, clean surfaces, so work around Trash Green is planned for dry weather. Let us know about access to every wall, plus any garages or outbuildings.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Location
- Trash Green (RG30)
- Wider area
- Reading
- Guarantee
- A year, on every job
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Should I try it myself first?
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
What the job involves on each surface
Concrete and blockwork
Concrete faces can be dusty and porous, so preparation is key. We prime where the sealant needs it.
Copings and trims
Metal and stone copings both move with temperature, so the joints need a sealant that stays flexible.
What affects the quote in Trash Green
The quote reflects the job in front of us. We take into account:
- The number of rooms or windows
- Access and height
- Whether old sealant or filler has to be cut out
- The product the joint needs
A failed joint rarely gets cheaper to fix by waiting. If you are unsure, ring 0345 464 0079 or send us an email and we will give you an honest view and a quote.
Helping us quote
To make quoting easier, please include:
- Roughly how big the job is
- Photos by email, if that’s easy
- If someone has resealed it before
- What’s wrong with the joints now
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we will talk you through what we’d do. Whenever you are ready, phone 0345 464 0079 or drop us an email.
Outside joints around Trash Green
London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. With historic houses such as Mapledurham House (about 4.7 miles north) nearby, there’s older building stock in the area around Trash Green as well as newer homes. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material.
Letting a property close to Theale station? Then outside joints that have cracked can let damp into a rental, so check them between lets. In the older streets around Church of St Mary the Virgin, an extension built onto an older house moves differently, and the joint between them takes the strain.
Trash Green is about 4 miles south-west of Reading, in Reading. Across the RG30 area, we cover external mastic for homes and businesses. Trash Green is one of 34 places in Reading we cover.
Postcode districts we cover here for external mastic: RG30. If you need external mastic at a property on Bennett's Hill and Theale Road or anywhere close by, we can help. We also cover Burghfield (1 mile south), Sheffield Bottom (1 mile north-west), Burghfield Hill (1 mile south), Sulhamstead Bannister Upper End (1 mile west) and Sulhamstead Abbots (1 mile south-west). Further out, we also cover Caversham (6 miles north-east), Norcot (3 miles north-east), West Reading (4 miles north-east), Tilehurst Within (3 miles north), Shinfield (5 miles east) and Arborfield Garrison (7 miles east).
Around Trash Green
In Trash Green, that means homes and buildings near Fox & Hounds pub and The Willink School and the streets around them. The nearest railway station is Theale station, about 1.4 miles north-west of the centre. Other landmarks nearby include Thames Valley Police Museum (1 mile west) and Battle Hospital (3.8 miles north-east). For a walk, there’s Hosehill Lake and Fobney Island Wetland Reserve.
Looking after it afterwards
A little care helps the new joints last. Our advice:
- Leave the joints unpainted unless we’ve said otherwise
- Walk round the building once a year and look at the joints
- Keep water from gutters off the wall
- Keep movement joints as flexible joints, not mortar
Make sure anyone working on the wall later knows where the movement joints are. They must stay as flexible joints, never rendered or pointed over.
Act while the splits are small. Then it’s a straightforward cut-out and reseal before water has had years to get in.
What we do, step by step
You do not need to clear the whole room or building before we come, only the area right around the joints. We protect the rest, and the work takes anything from a few hours to several days, depending on the building in most cases. For a village or hamlet like Trash Green, the journey is planned in advance: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- First, the joints are inspected and the access agreed.
- Every bit of old sealant and any mortar or debris is cut out.
- Joint faces are cleaned back and primed if the sealant needs it.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
Preparing for the visit
- Let us know about parking restrictions
- Keep pets and children clear of the area while we work
- Mention if the joints have been sealed before
How to get a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and add pictures by email if you can.
Advice
Why deal with it now?
Done well, a resealed joint is a neat, straight line that suits the wall. A rushed bead with no backing looks untidy and does not last, so it pays to do it properly once. Older cottages and farmhouses around Trash Green can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
Instead of a standard rate, we look at what your job involves: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Why book with us
- A choice of colours where the product allows
- 12-month guarantee on every job
- Anti-fungal sanitary silicone in wet areas
- Experience in homes, commercial sites and hotels
Take a look at how sealant jobs are priced and our reviews.
What we’re called out for in Trash Green
Some movement joints have been pointed up with mortar. With the joint locked solid, the movement turns into cracks elsewhere in the wall.
The problems people generally mention when they call include:
- Hard, crazed mastic that has stopped moving
- Leaking joints around cladding and façade panels
- Moss and dirt in joints with no sealant left
- Rigid filler in a joint that should flex
Schools such as Burghfield St Mary's C.E. Primary School are buildings too, and its movement joints, gutters and trims need looking after like any other building’s.
Before booking anyone
- Whether the sealant suits the joint
- Who turns up on the day
- The length of the guarantee
- What the quote includes, VAT included or not
FAQs for Trash Green
I let a flat near Theale station. Can you help?
Yes, landlords and agents are among the people we work for. Just phone 0345 464 0079 or email us with the address and what needs doing, and we’ll give you a clear quote.
Is Trash Green in your area for external mastic?
Yes, Trash Green is within the area we cover. Our work covers London and the South East. Just ring 0345 464 0079 or send us an email with a few details of the job, and we’ll send you a clear quote.
What colours does the sealant come in?
There’s a good range of exterior colours, including greys, browns, whites and stone tones. We choose the closest to your brick or render.
How much does external mastic cost in Trash Green?
We do not publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. We agree the price before any work begins.
How long does external mastic last?
There’s no fixed answer: 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 one-year guarantee.
Do you work at height?
That depends on how high the joints are and the ground below. Low-level joints are straightforward; for higher work, tell us about the building and we will confirm what’s needed.
Will there be a smell?
Possibly a little. It fades as the sealant cures, and ventilation helps.
Should I point up the gap in my brickwork?
No, not where the gap is a movement joint. Filling it with mortar defeats its purpose and can lead to cracking. A flexible sealant is the right fill.