West Berkshire · England
External & façade joints in Southend, West Berkshire
External mastic in Southend from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Rain getting behind render or cladding at a joint
- Moss and dirt in joints with no sealant left
- Brick movement joints where the sealant has split
Different surfaces, different methods
Brickwork movement joints
Brick moves with heat and moisture, and grows a little over time. The movement joint takes that up, so its sealant has to stay flexible.
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.
How we handle external mastic in Southend
Many failed façade joints only get noticed once there’s a stain or a damp patch inside. We look over the joints, agree the ones to renew and reseal with a flexible, weatherproof product in a colour to suit. We work on copings & trims, brickwork movement joints and concrete & block, and common reasons people get in touch are weeds or debris growing in open joints and failed seals between different materials.
Around Southend, older buildings can be stone, brick or timber-framed, many with extensions added later. The joints where those materials meet are the weak points.
A one-year guarantee comes as standard, so you’re covered after we have gone.
- Place
- Southend (RG7)
- Region
- West Berkshire
- Guarantee
- A year, on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Towns and villages near Southend
More services for Southend
Aftercare tips
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Never let anyone fill a movement joint with mortar
- Check external joints each spring
- Clear growth from the base of walls and joints
- Leave the joints unpainted unless we have said otherwise
If you have more work done on the wall, such as new render, cladding or an opening, show the contractor the movement joints. They must stay as flexible joints, never rendered or pointed over.
Gaps, plants or missing sealant in a joint are worth getting looked at. Early work is quicker and leaves a better finish.
How we quote for external mastic
The quote reflects the job in front of us. We take into account:
- How easy the joints are to reach
- Which sealant suits the joint
- The old material and how stubborn it is
- The number of rooms or windows
Leaving a failed joint usually makes the job bigger, not smaller, as water and mould keep getting in. If you are unsure, call 0345 464 0079 or drop us an email and we will give you an honest view and a quote.
What we need to know
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- What’s wrong with the joints now
- If it’s domestic, commercial or a hotel
- The rough size of the job
- Where the job is, and your postcode
Getting a quote is simple: let us know the job and the location. Photos by email help us understand the job.
What we are called out for in Southend
Using the wrong sealant is another common reason. A high-modulus or general-purpose sealant can be too rigid for a busy joint, and it tears off the sides.
Most people get in touch when they notice one of these:
- Old sealant gone brittle and cracked
- Leaking joints around cladding and façade panels
- Rain getting behind render or cladding at a joint
- Sealant pulling away from one side of the joint
For site and facilities teams at buildings such as Bradfield C.E. Primary School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
What to look for in a quote
- Are they insured?
- When the joint can take water or movement
- How long the guarantee is
- What happens if the job turns out different
Southend buildings and the weather
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 Basildon Park (about 4.8 miles north) nearby, there’s older building stock in the area around Southend as well as newer homes. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth.
For an older house near a landmark such as St Peter's Church, the joints between older walls, newer extensions and the roofline need a sealant that can move. If you let a flat or house near Aldermaston station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Southend is about 5 miles north-east of Thatcham, in West Berkshire. Every kind of property in Southend can book us for external mastic. The work is guaranteed for a year. Southend is one of 155 places in West Berkshire we cover for external mastic. There’s also a page for Reading, about 7 miles away.
Every address in RG7 is covered for external mastic, from the main roads to the quietest streets. If you need external mastic at a property on Heath Road, New Way and Cock Lane or a nearby road, our applicators can take on the job. Neighbouring places we cover for external mastic include Tutts Clump (1 mile north-west), Beenham Stocks (1 mile south), Beenham (1 mile south), Stanford Dingley (1 mile north-west) and Chapel Row (2 miles south-west). Larger places within reach include Newbury (8 miles west), Thatcham (5 miles south-west), Burghfield Common (4 miles south-east), Speenhamland (8 miles west), Spencers Wood (8 miles east) and Calcot (4 miles east).
Near you in Southend
Locally, jobs take us to homes and businesses close to The Queens Head pub and the streets around them. The nearest railway station is Aldermaston station, about 2.1 miles south. Other landmarks nearby include Thames Valley Police Museum (3 miles east) and Yattendon Castle (3.6 miles north-west). Green spaces nearby include Moor Copse Nature Reserve and Hosehill Lake.
Landlord and commercial work in Southend
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.
Letting agents often deal with us directly. Tell us the address, the job and how access works and we will quote.
What happens on the day
We bring everything the job needs with us, so there’s nothing for you to buy. Once we’ve agreed what’s being done, we protect the area and start. Most jobs take a few hours to a few days, depending on the length of joint and the access. For a village or hamlet like Southend, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- First, the joints are inspected and the access agreed.
- We cut out the old mastic and rake out anything in the joint.
- Joint faces are cleaned back and primed if the sealant needs it.
- Backing rod sized to the joint goes in to set the depth.
- The exterior sealant is applied, tooled and checked along its length.
Preparing for the visit
- Tell us about any water getting in
- Keep children and pets away from the work area
- Let us know about parking restrictions
Ask for a quote
Call for a quick quote, or email us if that’s easier. Tell us about the joints that need doing and we’ll talk you through the work and give you a clear price.
Advice
Southend: your questions answered
I let a flat near Aldermaston station. Can you help?
Yes, we work for landlords and letting agents. You can call 0345 464 0079 or email us with the address and a few details, and we will give you a fixed price before we start.
Will you come out to Southend?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Can you seal joints between render and window frames?
Yes. Different materials move at different rates, so the joint between them must be flexible. We choose one that suits both surfaces.
What’s an expansion joint in brickwork?
It’s a deliberate gap that lets the wall expand and contract without cracking. It’s sealed with a flexible sealant, not mortar.
Is the work guaranteed?
Yes. Every job comes with a one-year guarantee.
Where are you based?
Mr Mastic is based in Crawley. Our applicators cover Southend, along with the rest of our area.
What do you need from me for a quote?
A short description and the location, plus photos if you have them. We’ll ask anything else we need to know.
Will the new joint stand out?
We aim for a joint that suits the wall rather than one that jumps out. Colour is agreed with you before we begin.
DIY sealant or a professional job?
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.