Hertfordshire · England
External & façade joints in Hanscombe End, Hertfordshire
Professional external mastic in and around Hanscombe End, with every bit of old sealant taken out first and a 12-month guarantee.
- Brick movement joints where the sealant has split
- Weathered mastic that no longer stretches
- Plants rooting in failed movement joints
Why deal with it now?
A failed movement joint lets water into the wall and can run behind render or cladding. Resealing early keeps the job to the joint itself, rather than the wall around it. Around Hanscombe End, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
A few things move the cost up or down: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether the work is at height. We take all of that into account in your quote.
What you get with us
- We are fully insured
- One-year guarantee on every job
- Anti-fungal silicone where joints get wet
- Over 20 years’ experience
Read our cost guide and customer reviews.
External mastic in Hanscombe End, done properly
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. If you are dealing with damp patches traced to an open external joint and leaking joints around cladding and façade panels, we can put it right, on render & cladding joints, copings & trims and façade panels alike.
Around Hanscombe End, older buildings can be stone, brick or timber-framed, many with extensions added later. The joints where those materials meet are the weak points.
You get a one-year guarantee, the same in Hanscombe End as everywhere else we work.
- Place
- Hanscombe End (SG5)
- Wider area
- Hertfordshire
- Cover
- A year, on every job
- Quotes
- A clear price before work begins
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
What the job involves on each surface
Concrete and blockwork
Blockwork and concrete shrink over time and move with the seasons. Their movement joints are sealed over backing rod with a flexible sealant.
Render joints
Render is weaker at the surface than brick, so a sealant that stretches easily protects the edges. Priming is done where the sealant calls for it.
Outside joints around Hanscombe End
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Homes close to Church of All Saints include some older properties, and older walls, gutters and the joints where extensions meet them need a flexible sealant. Schools such as Shillington Lower School are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Hanscombe End is about 5 miles north-west of Hitchin, in Hertfordshire. Hanscombe End gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Hanscombe End is one of 381 towns and villages in Hertfordshire where we work for external mastic. We also work in London, about 36 miles from Hanscombe End.
We work across the SG5 postcode area for external mastic. Other places close to Hanscombe End include Apsley End (1 mile south), Shillington (1 mile east), Hexton (2 miles south), Pirton (2 miles south-east) and Pegsdon (2 miles south). Within a short drive, we also cover Stevenage (10 miles south-east), Welwyn Garden City (15 miles south-east), Harpenden (12 miles south), Hitchin (5 miles south-east), Letchworth (6 miles east) and Letchworth Garden City (6 miles east).
Near you in Hanscombe End
We work in homes and buildings around The Five Bells Public House and Wrest Park and the streets around them. Well-known places in the area include Keech Hospice Care (5.2 miles south-west) and Stondon Motor Museum (2.6 miles east). Green spaces nearby include Barton Gravel Pit and Cain Hill.
Landlords, agents and businesses in Hanscombe End
From a single let to a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we’ll give you a quote.
Towns and villages near Hanscombe End
More services for Hanscombe End
What affects the quote in Hanscombe End
We don’t publish a price list. What we look at:
- The old material and how stubborn it is
- Working hours on commercial sites
- Mould in or behind the old joints
- The number of rooms or windows
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you are not sure whether it needs doing, ring 0345 464 0079 or drop us an email for an honest opinion and a quote.
What we need to know
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- Any access issues, like height or stairs
- If it’s domestic, commercial or a hotel
- Pictures of the joints, sent by email
- The problem you’ve noticed
We quote each job on its own. Just phone 0345 464 0079 or email us with the details and send photos if you have them.
DIY versus a professional finish
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.
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
What happens on the day
When we get to you, we compare the joints with what we discussed. If anything is different, we explain it before carrying on. Most jobs then take a few hours for a handful of joints, longer for a whole elevation. Somewhere as small as Hanscombe End, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We start by walking round the building and agreeing the joints and the access.
- 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.
- We fit closed-cell backing rod to control the depth.
- The exterior sealant is applied, tooled and checked along its length.
Preparing for the visit
- Mention if the joints have been sealed before
- Where the joints are inside, avoid wetting them before we arrive
- Clear the area around the work
How to get a quote
To get a quote, phone 0345 464 0079 or email us with the location and a short description of the problem. We’ll give you a clear quote before any work starts.
Read more
When it isn’t the sealant
In fairness, some problems need a different trade:
- Movement that’s more than a sealant joint can take
- Adding movement joints to masonry that has none
- Cracks in the bricks or render themselves, away from the joints
Not sure which it is? You can ring 0345 464 0079 or email us and we will tell you honestly before booking.
Joints and surfaces we work on
- Façade panels
- Joints between brick and frames
- Concrete & block
- Brickwork movement joints
- Copings & trims
- Render & cladding joints
Common questions in Hanscombe End
Do you cover Hanscombe End for external mastic?
Yes, Hanscombe End is within the area we cover. Our work covers London and the South East. You can call 0345 464 0079 or email us and let us know what needs doing, and we’ll give you a clear price.
What guarantee comes with external mastic in Hanscombe End?
All our work, in Hanscombe End and everywhere else, comes with a 12-month guarantee. We are also fully insured and ARBOMaster approved.
Do you work for hotels and businesses?
Yes. Hotels, offices and other businesses use us, and we’re fully insured.
When is the sealant fully cured?
It depends on the product and the conditions. Before we leave, we’ll tell you the cure time.
I rent my home. Can I book you?
We can work for tenants, landlords or agents. Get your landlord’s agreement first.
Can you seal joints between two different materials?
Yes. Materials like render, brick, metal and uPVC all move differently, so a flexible sealant is needed where they meet. The sealant is matched to both sides.
Will there be a smell?
Possibly a little. It fades as the sealant cures.
How often do external joints need resealing?
That varies with the weather the wall faces, how much it moves and the sealant used. Treat it as a maintenance item and look at it yearly.