Hertfordshire · England
External Mastic in Fields End
Problem with your movement joints in Fields End? We remove the old material, prepare the joints and seal them properly, with a 12-month guarantee.
- Sealant that has lost its bond to the brick or render
- Cracked joints where brick meets render or frames
- Weathered mastic that no longer stretches
Fields End questions
I let a flat near Hemel Hempstead station. Can you help?
Yes, we work for landlords and agents. Just ring 0345 464 0079 or drop us an email and tell us about the property, and we’ll give you a clear quote.
Do you cover smaller places like Fields End?
Yes. Fields End is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Is there a guarantee?
Yes, always. There’s a 12-month guarantee on every job, large or small.
Are you ARBOMaster approved?
Yes. We’re approved under the ARBOMaster scheme, the approved applicator scheme for Arbo sealants.
Can you seal joints between render and window frames?
Yes. Where different materials meet is one of the most common joints we seal. The sealant is chosen to bond to both sides, primed where needed.
Will you leave a mess?
Very little: the area around the joints is protected first, and we clear up the old sealant and our materials before we leave.
How do I get a quote for external mastic in Fields End?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. You will get a clear quote before work begins.
Do the sealants smell?
There can be a smell while the sealant cures. Opening a window helps.
External mastic in Fields End, done properly
Joints in render and cladding are easy to overlook until a damp patch appears. 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 panel joints letting water in and old sealant gone brittle and cracked, we can put it right, on concrete & block, brickwork movement joints and façade panels alike.
Older homes in small places like Fields End may be stone, brick or timber-framed, often with later extensions. The joints where those materials meet are the weak points.
Our work is backed for twelve months, in Fields End and everywhere else we cover.
- Place
- Fields End (HP1)
- Wider area
- Hertfordshire
- Guarantee
- A year, on every job
- Quotes
- A clear price before work begins
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Keeping the joints in good condition
Looking after new joints is easy, and it makes a real difference:
- Wash walls gently around the sealant
- Point out the joints to other trades
- Keep soil, plants and ivy away from the joints
- Look over the joints every year, ideally after winter
Look over the joints once a year, ideally after winter. Splits, gaps at the edges or plants in the joint are early warning signs.
Gaps, plants or missing sealant in a joint are worth getting looked at. Early work is quicker and leaves a better finish.
What happens on the day
We work through the job in order: protect, prepare, seal, tidy. Typically it takes a few hours for a handful of joints, longer for a whole elevation, and the area is left clean. In a small place like Fields End, access is usually the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We look at every joint and agree a colour to suit the wall.
- 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.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Before we arrive
- Move anything stored near the joints
- Let us know about earlier repairs to the joints
- For indoor joints, keep the area dry beforehand if you can
Getting a quote
For a quote, ring 0345 464 0079 or email us with the location and a short description of the problem. You’ll have a clear quote before any work starts.
Advice
Surface by surface
Concrete and blockwork
Big joints in concrete need careful depth control. Backing rod sized to the joint sets it.
Brickwork movement joints
People sometimes point up a brick movement joint by mistake. If that is happened, we rake it out and reseal it properly where it can be done safely.
DIY sealant or a professional job?
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
A DIY attempt does not rule out a professional job. We remove it and do the joint properly, so just mention it when you contact us.
Honest limits
Some problems need a builder, plumber or other trade rather than us:
- Damp that isn’t coming from the joint
- Loose or hollow render, which needs re-rendering
- Walls that need new movement joints cut into them
If in doubt, ring 0345 464 0079 or drop us an email and we’ll say what we think before booking.
Surfaces we seal
- Concrete & block
- Brickwork movement joints
- Render & cladding joints
- Copings & trims
- Joints between brick and frames
- Façade panels
Common problems we fix in Fields End
Sometimes a movement joint was filled with mortar or a rigid filler, often by someone who didn’t know what it was for. With the joint locked solid, the movement turns into cracks elsewhere in the wall.
Keep an eye out for any of the following:
- Movement joints with cracked, split or missing sealant
- Failed sealant between panels on a façade
- Cracked joints where brick meets render or frames
- Old sealant gone brittle and cracked
Rented homes near Hemel Hempstead station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Before booking anyone
- Whether they seal over old material or remove it
- How the colour is chosen
- Who turns up on the day
- How the surfaces are prepared before sealing
Fields End buildings and the weather
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you live in an older home near St Alban's Church, the joints between older walls, newer extensions and the roofline need a sealant that can move. Managing a site like John F Kennedy Catholic School? Then its movement joints, gutters and trims need looking after like any other building’s.
Fields End is about 2 miles west of Hemel Hempstead, in Hertfordshire. Homes, rented property, offices and hotels in Fields End can book us for external mastic. The work is guaranteed for a year. Fields End is one of 381 places in Hertfordshire we cover. We also work in London, around 25 miles away.
We work across the HP1 postcode area for external mastic and the streets around it. Local streets include Fields End Lane and Pouchen End Lane, and we cover them all. If you are just outside Fields End, we cover Chaulden (1 mile south-east), Potten End (1 mile north-west), Bourne End (1 mile south), Frithsden (1 mile north-west) and Nettleden (2 miles north). We also work in nearby towns such as Watford (8 miles south-east), St Albans (8 miles east), Welwyn Garden City (14 miles east), Harpenden (8 miles north-east), Hatfield (12 miles east) and Borehamwood (12 miles south-east).
Local landmarks in Fields End
In Fields End, that means homes and buildings near Top of the World pub, Gadebridge Park and Micklem Primary School and the streets around them. Fields End’s nearest station is Hemel Hempstead station, about 1.6 miles south-east. Nearby you’ll also find Hemel Hempstead Hospital (1.9 miles south-east). Not far away are Long Deans.
What happens if it’s left?
A properly done movement joint is an even line in a colour that suits the wall. A rushed bead with no backing looks untidy and does not last. Older cottages and farmhouses around Fields End can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you’re not sure whether it needs doing, phone 0345 464 0079 or drop us an email and we’ll give you an honest view and a quote.
Why Fields End clients choose us
- Neat joints and a tidy finish
- Every job guaranteed for a year
- Colour picked to suit the job
- White, clear, grey or coloured to suit, where the product allows
Take a look at how sealant jobs are priced and customer reviews.