Hertfordshire · England
External & façade joints in Shephall, Hertfordshire
Movement joints in Shephall need attention? We remove the old material, prepare the joints and seal them properly, with a 12-month guarantee.
- Joints where the bead has come unstuck
- Failed seals between different materials
- Joints with sealant missing in places
When to call us in Shephall
The wrong product in a moving joint is a classic cause. A high-modulus or general-purpose sealant can be too rigid for a busy joint, so it pulls away from the edges.
Keep an eye out for any of the following:
- Old sealant gone brittle and cracked
- Failed seals between different materials
- Movement joints filled with mortar instead of sealant
- Plants rooting in failed movement joints
In the older streets around Church of Saint Mary, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Questions to ask before booking
- How hidden problems are handled
- How the joint is cleaned and prepared
- What the quote includes, VAT included or not
- What insurance they hold
External mastic for homes and businesses in Shephall
Getting the depth right is half the job. Closed-cell backing rod sets the depth and stops the sealant sticking to the back, so it bonds to the two sides only and can stretch. We are often asked to deal with moss and dirt in joints with no sealant left and sealant that has lost its bond to the brick or render, on concrete & block, copings & trims and façade panels.
Outbuildings, garages and conservatories around homes in places like Shephall add more joints to look after. Leaks usually start at a gutter end, a garage door frame or where an extension meets the house.
You’re covered for a year from the day we finish. If there’s a problem with it, please call 0345 464 0079 or send us an email.
- Place
- Shephall (SG2, SG1)
- Region
- Hertfordshire
- Guarantee
- One year on every job
- Quote
- A clear price before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
What affects the quote in Shephall
Jobs vary more than people expect. What affects the quote:
- Access and height
- How many areas need sealing
- When we can work, for business premises
- Whether old sealant or filler has to be cut out
Combining jobs into one visit is generally more efficient than separate visits. We will give you a clear quote for the lot.
Asking for a quote
You do not need to know the technical terms. Just tell us:
- Roughly how big the job is
- What the problem is, such as mould, gaps, leaks or cracking
- Whether it’s a home or a business
- The address or postcode of the job
For a quote, call 0345 464 0079 or email us with the location and a short description of the problem. You’ll have a clear quote before we start.
Looking after it afterwards
After the cure time, these simple habits help:
- Look over the joints every year, ideally after winter
- Act on the first splits you see
- Fix overflowing gutters above sealed joints
- Avoid pressure-washing directly into sealant joints
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. At that stage it’s a simple cut out and reseal before water has had years to get in.
How the job changes by surface
Brickwork movement joints
Brick moves with heat and moisture, and grows a little over time. That movement goes into the joint, so the sealant in it must stay soft and stretchy.
Copings and trims
Joints in copings, parapets and trims are exposed to the worst of the weather. We reseal them with an exterior sealant suited to the material.
Shephall: your questions answered
Do you cover smaller places like Shephall?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Do you work for landlords with property near Stevenage station?
Yes, landlords and agents are among the people we work for. You can ring 0345 464 0079 or email us with the details for a clear quote.
Does someone need to be in?
That depends on where the joints are. Inside work needs someone to give us access.
Do you remove the old sealant?
Yes. Sealing over the old bead is the commonest cause of early failure, so we never do it.
Do you use backing rod?
Backing rod goes into deeper joints as a matter of course. It sets the sealant depth and prevents three-sided bonding.
Are you insured?
Yes, we’re fully insured.
How do I get a quote for external mastic in Shephall?
Every job is different, so each one gets its own quote. To get one, phone 0345 464 0079 or drop us an email with a short description of the job.
Are you ARBOMaster approved?
Yes. We’re an ARBOMaster approved applicator.
The process
We work through the job in order: protection first, then preparation, sealing and a tidy-up. Typically it takes a few hours for a handful of joints, longer for a whole elevation, and the area is left clean. Parking around Shephall is normally 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 walking round the building and agreeing the joints and the access.
- We cut out the old mastic and rake out anything in the joint.
- The faces are brushed clean and primed where the product requires it.
- We fit closed-cell backing rod to control the depth.
- We apply the sealant, tool it and check the whole run.
Before we arrive
- Let us know about earlier repairs to the joints
- Let us know about parking restrictions
- On commercial sites, let us know about site rules
Getting a quote
Call for a quick quote, or email us if that is easier. Tell us about the joints that need doing and we will explain what’s involved and send you a clear quote.
Advice
Walls and rooflines in Shephall
With historic houses such as Aston Bury (about 1.6 miles south-east) nearby, there’s older building stock in the area around Shephall 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. Shephall is part of Stevenage, one of the post-war new towns. Homes here were built in phases, many of them in the post-war decades, so neighbouring houses often have rooflines and wall joints of the same age, wearing out at the same time.
For landlords with property near Stevenage station, split movement joints are easy to miss on a rental until damp shows inside. Schools such as Peartree Spring Primary School are buildings too, and its movement joints, gutters and trims need looking after like any other building’s.
Shephall is about 1 mile south of Stevenage, in Hertfordshire. Anywhere in SG2, we cover external mastic for homes and businesses. Our Hertfordshire coverage runs to 381 places, and Shephall is one of them. There’s also a page for London, roughly 27 miles from Shephall.
We work across the SG2 and SG1 postcode area for external mastic and the streets around it. Whether your property is on Unwin Road, Oxleys Road and Burwell Road or a nearby road, we can help. We also cover the places around Shephall: Aston (1 mile east), Bragbury End (1 mile south-east), Knebworth (2 miles south), Hook's Cross (2 miles south-east) and Woolmer Green (3 miles south). Within a short drive, we also cover Hemel Hempstead (15 miles south-west), St Albans (12 miles south-west), Bishop's Stortford (14 miles east), Welwyn Garden City (6 miles south), Harpenden (9 miles south-west) and Hitchin (6 miles north-west).
What’s near Shephall
We work in homes and buildings around Coopers Inn, The Heathcote School and Barnwell School, among other places. The closest station to Shephall is Stevenage station, about 1.4 miles north-west of the centre. Other landmarks nearby include Benington Castle (2.6 miles east) and Lister Hospital (2.7 miles north-west). The countryside around Shephall includes Ridlins Mire.
Towns and villages near Shephall
Also in Shephall
DIY versus a professional finish
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
What sealant work cannot fix
To be straight with you, some problems need a different trade:
- Adding movement joints to masonry that has none
- Damp that isn’t coming from the joint
- Cracks in the bricks or render themselves, away from the joints
If you’re not sure, just phone 0345 464 0079 or email us and we’ll give you a straight answer.
Surfaces we seal
- Brickwork movement joints
- Copings & trims
- Render & cladding joints
- Joints between brick and frames
- Concrete & block
- Façade panels