Hertfordshire · England
External & façade joints in Little Almshoe, Hertfordshire
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Little Almshoe and across Hertfordshire. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Joints with sealant missing in places
- Gaps where render, brick and frames meet
- Old sealant gone brittle and cracked
Do you need external mastic in Little Almshoe?
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.
It’s worth asking for a quote if you see:
- Sealant pulling away from one side of the joint
- Movement joints with cracked, split or missing sealant
- Moss and dirt in joints with no sealant left
- Movement joints filled with mortar instead of sealant
For site and facilities teams at buildings such as St Ippolyts Church of England Aided Primary School, its movement joints, gutters and trims need looking after like any other building’s.
What to look for in a quote
- How the surfaces are prepared before sealing
- What happens if the job turns out different
- Who does the work, and how experienced they are
- Is the old sealant removed completely?
External mastic in Little Almshoe, done properly
A movement joint is a deliberate break that lets a wall expand and contract. The sealant in it has to stretch and squeeze for years, and when it fails, the wall takes the strain and water finds a way in. We work on concrete & block, joints between brick and frames and copings & trims, and common reasons people get in touch are moss and dirt in joints with no sealant left and failed sealant between panels on a façade.
Older homes in small places like Little Almshoe may be stone, brick or timber-framed, often with later extensions. Where one material meets another is where water usually gets in, and they need the right sealant at the right depth.
You get a one-year guarantee, the same in Little Almshoe as everywhere else we work.
- Place
- Little Almshoe (SG4)
- Wider area
- Hertfordshire
- Guarantee
- One year on every job
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Nearby places to Little Almshoe
What else we do in Little Almshoe
What happens if it’s left?
Water gets in through a failed movement joint and can run behind render or cladding. Dealing with it early keeps the repair to the joint, rather than the wall around it. Older cottages and farmhouses around Little Almshoe can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, plus any working-time requirements on site. Ask us for a quote and we will explain what it covers.
Why choose Mr Mastic in Little Almshoe
- White, clear, grey or coloured to suit, where the product allows
- Colour agreed with you before any work starts
- Every job guaranteed for a year
- We leave the area clean and tidy
See our cost guide or customer reviews.
Should I try it myself first?
The biggest DIY mistake is sealing over old sealant. 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.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is.
Landlord and commercial work in Little Almshoe
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. Several properties can be quoted together.
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
Quotes for external mastic in Little Almshoe
There’s no set price list, because jobs vary so much. The quote depends on:
- Mould in or behind the old joints
- When we can work, for business premises
- Which sealant suits the joint
- The old material and how stubborn it is
There are no prices on our website, because each job is priced on what it involves. Call for a quick quote.
Asking for a quote
What to tell us when you ask for a quote:
- Whether it has been sealed before
- Roughly how big the job is
- The address or postcode of the job
- The type of property
Asking for a quote is easy: tell us what needs doing and where and its rough size. Photos by email help us understand the job.
When it isn’t the sealant
In fairness, there are a few things sealant won’t fix:
- Movement that’s more than a sealant joint can take
- Cracked brickwork or render that needs a builder or plasterer
- Walls that need new movement joints cut into them
If you’re not sure, just phone 0345 464 0079 or drop us an email and we’ll give you a straight answer before you book.
Surfaces we seal
- Brickwork movement joints
- Concrete & block
- Joints between brick and frames
- Façade panels
- Copings & trims
- Render & cladding joints
Little Almshoe buildings and the weather
With historic houses such as Knebworth House (about 3.8 miles south-east) nearby, there’s older building stock in the area around Little Almshoe as well as newer homes. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth. Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
In the older streets around Church of St Ippolyts (church of England), older walls, gutters and the joints where extensions meet them need a flexible sealant. Letting a property close to Hitchin station? Then split movement joints are easy to miss on a rental until damp shows inside.
Little Almshoe is about 2 miles south of Hitchin, in Hertfordshire. Every kind of property in Little Almshoe can book us for external mastic. Every job comes with our one-year guarantee. We cover 381 towns and villages across Hertfordshire, from the larger towns to small villages. For nearby work, see our London page (30 miles or so).
Jobs for external mastic in SG4 is quoted and booked the same way as anywhere else. We also cover St Ibbs (1 mile north), Sperberry Hill (1 mile north), St Ippolyts (1 mile north), Gosmore (1 mile north-west) and Poynders End (1 mile south-west). Larger places within reach include Hemel Hempstead (14 miles south-west), Stevenage (3 miles east), St Albans (12 miles south), Welwyn Garden City (9 miles south), Harpenden (8 miles south-west) and Hoddesdon (15 miles south-east).
Local landmarks in Little Almshoe
Around Little Almshoe, our work takes us to homes and buildings near The Rusty Gun pub, Hitchin Girls' School and Kingshott School. The nearest railway station is Hitchin station, about 2.2 miles north of the centre. Other landmarks nearby include Lister Hospital (2.1 miles east) and Wymondley Castle (1.9 miles north-east). Not far away are Purwell Ninesprings and Markham's Hill.
Your questions about external mastic in Little Almshoe
Do you work for landlords with property near Hitchin station?
Yes. We work for landlords and letting agents as well as householders. Just call 0345 464 0079 or email us with the address and what needs doing, and we’ll send you a clear quote.
Do you cover smaller places like Little Almshoe?
Yes. Little Almshoe is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Why do you put foam in the joint first?
We fit closed-cell backing rod wherever the joint depth needs controlling. It controls the depth and stops the sealant bonding to the back so the bead can stretch.
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.
Should I point up the gap in my brickwork?
No, not where the gap is a movement joint. Pointing it stops it working, and the wall may crack nearby. We’ll reseal it with a flexible sealant.
Do you remove the old sealant?
Yes. Sealing over old sealant is the main reason resealing fails early, and it’s something we never do.
Why is there a gap in my brick wall?
Most straight vertical gaps in brickwork are movement joints. It gives the wall room to move, and it should be sealed with a flexible sealant.
Will there be a smell?
Sometimes, a little. It fades as the sealant cures.
What we do, step by step
All our tools and materials come with us in the van. After a quick look at the joints together, the area is protected and the work begins. Most jobs take anything from a few hours to several days, depending on the building. Somewhere as small as Little Almshoe, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- Old sealant and any debris are cut and raked out.
- Both sides are cleaned back to sound material and primed if needed.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
Preparing for the visit
- Keep children and pets away from the work area
- For business premises, tell us about site rules or sign-in
- Tell us if parking is tricky
Get a quote
For a quote, phone 0345 464 0079 or email us and tell us where the job is and what the problem looks like. We’ll give you a clear price before any work starts.