Hertfordshire · England
External & façade joints in Aldbury, Hertfordshire
External mastic for Aldbury and the surrounding area: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Joints with sealant missing in places
- Plants rooting in failed movement joints
- Hard, crazed mastic that has stopped moving
External mastic for homes and businesses in Aldbury
Movement joints let brickwork, render and cladding expand and shrink without cracking. 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. Common call-outs are for rain getting behind render or cladding at a joint and cracked joints where brick meets render or frames, on façade panels, concrete & block and joints between brick and frames.
External sealant needs dry, clean surfaces, so work around Aldbury is planned for dry weather. Tell us about access to all sides of the building, including outbuildings and garages.
You get a one-year guarantee, the same in Aldbury as everywhere else we work.
- Place
- Aldbury (HP23)
- Wider area
- Hertfordshire
- Cover
- One year on every job
- Quotes
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Landlord and commercial work in Aldbury
Whether it’s one flat or a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
Letting agents often deal with us directly. Tell us the address, the job and how access works and we will quote.
Signs you need external mastic in Aldbury
The wrong product in a moving joint is a classic cause. A stiff, general-purpose sealant cannot cope with a joint that moves a lot, and it tears off the sides.
Signs it’s time to call us include:
- Brick movement joints where the sealant has split
- Sealant that has lost its bond to the brick or render
- Movement joints filled with mortar instead of sealant
- Panel joints letting water in
Rented homes near Tring station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Questions to ask before you book
- Which sealant they’ll use, and why
- What guarantee comes with the work
- Whether you can choose the colour
- How long to leave it before use
Your questions about external mastic in Aldbury
I let a flat near Tring station. Can you help?
Yes, we work for landlords and agents. You can ring 0345 464 0079 or send us an email with the address and a few details, and we’ll give you a fixed price before work begins.
Is Aldbury in your area for external mastic?
Yes. We work across London and the South East, and Aldbury is part of that. You can ring 0345 464 0079 or email us and let us know what needs doing, and we’ll give you a clear quote.
Can you quote for more than one area?
Yes, we can. Several rooms, windows or areas can go on one quote.
Can I do it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. Most DIY failures come from sealing over old material, wet joints or too much sealant.
How do you reach high-level joints?
It depends on the height and the site. Ground-floor joints are simple; for higher work, tell us about the building and we’ll confirm what’s needed.
What does external mastic cost?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. You’ll get a clear quote before work begins.
Do you remove the old sealant?
Yes. All of the old material is cut out and the joint cleaned.
Are you fully insured?
Yes, we’re fully insured for every job we do.
How to look after the new joints
After the cure time, these simple habits help:
- Never let anyone fill a movement joint with mortar
- Get split or bare joints resealed while the damage is small
- Deal with leaking gutters that soak the joints below
- Keep high-pressure jets off the joints
Have a quick look at the joints each spring. Splits, gaps at the edges or plants in the joint are early warning signs.
An open movement joint lets rain into the wall every time it pours. Over time it can mean damp inside, stained render or frost-damaged brick.
What happens if it’s left?
The longer a joint stays open, the more water the wall takes in. In cold weather, frost can damage wet brick and render near the open joint, so the problem grows beyond the joint itself. Older cottages and farmhouses around Aldbury 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, how we reach it and what it needs. Call for a quick quote and we’ll go through it with you.
Why us?
- Full insurance on every job
- A choice of colours where the product allows
- Colour agreed with you before any work starts
- Rated 4.9 stars on Google
Read what affects the cost or our reviews.
How we quote for external mastic
Every job gets its own quote. These are the things that affect it:
- The old material and how stubborn it is
- How much there is to do
- Whether there’s mould to deal with
- Access and height
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you are unsure, ring 0345 464 0079 or email us and we will give you an honest view and a quote.
Helping us quote
Before you ask for a quote, have a think about:
- Roughly how big the job is
- If it’s domestic, commercial or a hotel
- Any previous sealing or DIY work
- What the problem is, such as mould, gaps, leaks or cracking
We don’t publish a price list, because every job is different. Instead, we give you a clear quote for your job. To arrange one, phone 0345 464 0079 or drop us an email.
DIY versus a professional finish
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
Also near Aldbury
What else we do in Aldbury
How the visit works
On the day, we start by going over the job with you. Surfaces next to the work are protected before any work begins. Most jobs take anything from a few hours to several days, depending on the building. Somewhere like Aldbury needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- 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.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Getting ready for the visit
- Tell us about any water getting in
- Where the joints are inside, avoid wetting them before we arrive
- Tell us about any previous sealing or DIY attempts
Ask for a quote
Getting a quote is simple: let us know what needs doing and where, and roughly how big it is. Photos by email help us understand the job.
Advice
External mastic in Aldbury: local notes
With historic houses such as Cholesbury Manor House (about 3.9 miles south-west) nearby, there’s older building stock in the area around Aldbury as well as newer homes. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material. Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you look after a building such as Aldbury Church of England Primary School, larger buildings have long runs of movement joint that eventually need resealing. Homes close to Church of St John the Baptist include some older properties, and old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Aldbury is about 3 miles north-west of Berkhamsted, in Hertfordshire. If you need external mastic in Aldbury, please ring 0345 464 0079 or email us for a quick quote. We cover Hertfordshire from our Crawley base. Aldbury is one of 381 places in Hertfordshire we cover. There’s also a page for Oxford, roughly 27 miles from Aldbury.
Our applicators cover all of the HP23 postcode area for external mastic and the streets around it. Streets in the area include Station Road, Trooper Road and Toms Hill Road. Nearby, we also carry out external mastic in Barley End (1 mile north), Bulbourne (2 miles north-west), Tringford (3 miles west) and Marsworth (3 miles north-west). Further out, we also cover Watford (13 miles south-east), Hemel Hempstead (7 miles south-east), St Albans (12 miles east), Harpenden (11 miles east), Berkhamsted (3 miles south-east) and Bushey (15 miles south-east).
What’s near Aldbury
Around Aldbury, our work takes us to homes and buildings near The Valiant Trooper Public House and Tring School, among other places. The nearest railway station is Tring station, roughly 0.9 miles west. Nearby you’ll also find Hawridge Court (4.2 miles south) and Pitstone Green Museum (2.7 miles north-west). Not far away are College Lake nature reserve and Ivinghoe Beacon.