Hertfordshire · England
External & façade joints in Benslow, Hertfordshire
Sealing brickwork movement joints, render, cladding and façade joints for Benslow, backed by a 12-month guarantee. Call for a quick quote.
- Leaking joints around cladding and façade panels
- Weathered mastic that no longer stretches
- Movement joints with cracked, split or missing sealant
Your questions about external mastic in Benslow
Do you cover Benslow for external mastic?
Yes, Benslow is within the area we cover. We work across London and the South East. Just phone 0345 464 0079 or send us an email with a few details of the job, and we’ll send you a clear quote.
Do you cover smaller places like Benslow?
Yes. Benslow is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
What do you need from me for a quote?
Just the basics: where it is, what you’ve noticed and how we reach it. Then phone 0345 464 0079 or send us an email.
Can you match the colour of my brickwork?
We choose a sealant colour to suit the brick, stone or render, so the joint sits quietly in the wall. There’s a wide choice of exterior colours.
Why do you put foam in the joint first?
Backing rod goes into deeper joints as a matter of course. It sets the sealant depth and prevents three-sided bonding.
What does external mastic cost?
The cost depends on the size of the job, access and how much old sealant has to come out. Call for a quick quote.
How long does the job take?
A typical job takes a few hours for a handful of joints, longer for a whole elevation. We will confirm how long when we quote.
Are you fully insured?
Yes. We are fully insured, and we have been doing sealant work for more than 20 years.
External mastic for homes and businesses in Benslow
Low-level joints can normally be done from the ground. Where joints are higher up, tell us about the building when you get in touch and we’ll confirm what access is needed. We work on joints between brick and frames, copings & trims and render & cladding joints, and the jobs we see most are panel joints letting water in and movement joints filled with mortar instead of sealant.
Homes around Benslow range from older cottages to newer houses, with walls and rooflines of every type. Older gutters and trims need their joints resealed; newer brick and render need their movement joints kept sound.
A one-year guarantee comes with the work, just as it does everywhere we cover.
- Place
- Benslow (SG4, SG5)
- Region
- Hertfordshire
- Guarantee
- 12 months on all our work
- Quotes
- A clear price before we start
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Why deal with it now?
Done well, a resealed joint is a neat, straight line that suits the wall. A hurried job with smeared edges and no backing looks worse and fails sooner. Homes in smaller places like Benslow can face more weather, and failed outside joints let damp into walls. Indoors, a failed seal lets water into floors and panels as it would anywhere.
What you pay reflects the work, not guesswork. That’s why we ask about the job first.
Why choose Mr Mastic in Benslow
- An ARBOMaster approved applicator
- We never seal over old sealant
- Colour agreed with you before any work starts
- Trusted Arbo and Everbuild sealants
Read what affects the cost and what customers say.
More services for Benslow
Common problems we fix in Benslow
Every building moves. Clay bricks expand slightly over their life, concrete and block shrink, and everything moves with temperature and wet. All of that ends up in the joint sealant.
Most people get in touch after spotting something like this:
- Weathered mastic that no longer stretches
- Brick movement joints where the sealant has split
- Movement joints filled with mortar instead of sealant
- Failed seals between different materials
Managing a site like William Ransom Primary School? Then larger buildings have long runs of movement joint that eventually need resealing.
Before booking anyone
- Who turns up on the day
- What happens if they find a problem under the old sealant
- What preparation is included
- How the colour is chosen
What we do, step by step
There is not much for you to do on the day. Point us to the joints and we will get on with it. The job generally takes a few hours for a handful of joints, longer for a whole elevation. In a smaller place like Benslow, parking is seldom the issue; lanes, gates and long drives are worth mentioning. For outside work, side access and the height of the joints help us plan.
- Each joint is checked and the colour of the new sealant agreed.
- We take out the old sealant until the faces are sound.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- We prime the faces where required.
- We gun in low-modulus sealant and tool it neatly.
Preparing for the visit
- Let us know about stairs, lifts or work at height
- Tell us about any water getting in
- Try not to wet indoor joints just before the visit
Ask for a quote
For external mastic in Benslow, phone 0345 464 0079 or email us. Tell us what the problem is and where, and we’ll agree the price before any work begins.
Advice
Looking after it afterwards
A little care helps the new joints last. We recommend:
- Have failed joints looked at early
- Leave the joints unpainted unless we’ve said otherwise
- Check external joints each spring
- Avoid pressure-washing directly into sealant joints
Don’t paint over the new sealant unless we’ve said the product is paintable. Paint can crack on a flexible joint.
Small splits are the time to act. At that stage it’s a simple cut out and reseal.
Walls and rooflines in Benslow
London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
In the older streets around Church of the Holy Saviour, the joints between older walls, newer extensions and the roofline need a sealant that can move. If you let a flat or house near Hitchin station, outside joints that have cracked can let damp into a rental, so check them between lets.
Benslow is about 1 mile east of Hitchin, in Hertfordshire. Jobs in Benslow get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Across Hertfordshire, we cover 381 places, and Benslow is one of them. We also work in London, about 32 miles from Benslow.
Work in SG4 and SG5 works the same way as everywhere else we cover. Streets in the area include Water Lane, Riddy Lane and The Avenue. Benslow sits on or near the A505, so getting to you is simple. We also cover Hitchin (1 mile west), Poets Estate (1 mile east), Walsworth (1 mile north-east), Bearton (1 mile north-west) and Westmill (1 mile north-west). Further out, we also cover Stevenage (5 miles south-east), St Albans (14 miles south), Welwyn Garden City (11 miles south), Harpenden (10 miles south), Hatfield (13 miles south) and Hertford (13 miles south-east).
Landmarks near Benslow
Locally, jobs take us to homes and businesses close to St Mary's Church, Kingshott School and Hitchin Girls' School and the streets around them. Also close by are The Albert pub (less than half a mile north-west) and Butts Close (0.8 miles west). There’s a railway station in Benslow itself: Hitchin station. Nearby you’ll also find Wymondley Castle (1.4 miles south-east) and Lister Hospital (2.8 miles south-east). Not far away are Markham's Hill and Purwell Ninesprings.
Surface by surface
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.
Concrete and blockwork
Blockwork and concrete shrink over time and move with the seasons. We reseal their joints with backing rod and a flexible product.
Should I try it myself first?
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is.
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
Quotes for external mastic in Benslow
You’ll get a clear quote before we start. It’s based on:
- The size of the job
- Working hours on commercial sites
- Whether there’s mould to deal with
- Which sealant suits the joint
We do not show prices on the website, because each job is priced on what it involves. For a quick quote, please ring 0345 464 0079 or drop us an email and we’ll talk you through it.
What we need to know
To help us quote quickly, please include:
- The address or postcode of the job
- Photos by email, if that is easy
- What’s wrong with the joints now
- Any previous sealing or DIY work
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we’ll talk you through what we’d do. Whenever you are ready, phone 0345 464 0079 or email us.