Hertfordshire · England
External Mastic in Tyttenhanger
Sealing brickwork movement joints, render, cladding and façade joints for homeowners, landlords and businesses in Tyttenhanger. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Weathered mastic that no longer stretches
- Leaking joints around cladding and façade panels
- Damp patches traced to an open external joint
How we handle external mastic in Tyttenhanger
Where two different materials meet, such as brick and render or blockwork and metal, they move at different rates. A flexible exterior sealant takes up that movement where a rigid filler would soon crack. We’re often asked to deal with rigid filler in a joint that should flex and sealant that has lost its bond to the brick or render, on copings & trims, concrete & block and façade panels.
Older homes in small places like Tyttenhanger may be stone, brick or timber-framed, often with later extensions. Where one material meets another is where water generally gets in.
The work is guaranteed for twelve months. If something is not right with it in that time, tell us and we will put it right.
- Place
- Tyttenhanger (AL4)
- Region
- Hertfordshire
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Why it’s worth doing now in Tyttenhanger
Pointing a movement joint with mortar might seem a neat fix, but it locks the joint solid. The wall then cracks somewhere else. A flexible sealant over backing rod is what the joint needs. Around Tyttenhanger, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
Homes and businesses are quoted the same way: the amount of work, the access and the products needed, along with when we can work on site. Call for a quick quote and we’ll go through it with you.
Why us?
- We never seal over old sealant
- Neat joints and a tidy finish
- Over 20 years’ experience
- Trusted Arbo and Everbuild sealants
See what affects the cost and our reviews.
Towns and villages near Tyttenhanger
What else we do in Tyttenhanger
Your questions about external mastic in Tyttenhanger
Do you cover smaller places like Tyttenhanger?
Yes, Tyttenhanger is covered. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Is Tyttenhanger in your area for external mastic?
Yes, Tyttenhanger is within the area we cover. Our work covers London and the South East. Just phone 0345 464 0079 or drop us an email with a few details of the job.
How long does the job take?
It depends on the size of the job, but as a guide it takes a few hours for a handful of joints, longer for a whole elevation. We’ll give you a better idea when we quote.
Do the sealants smell?
There can be a smell while the sealant cures, which fades as it sets. Opening a window helps.
Does someone need to be in?
It depends on the job. Inside work needs someone to give us access, and for outside work we’ll agree access with you when we book.
Can you match the colour of my brickwork?
We aim for a joint that suits the wall rather than one that jumps out. We will talk through colour options before any work starts from the range available.
I’m a tenant. Can you help?
We’re happy to deal with the tenant, landlord or agent. Get your landlord’s agreement first.
How do you reach high-level joints?
It depends on the building. Where joints can be reached safely, we will do them. Tell us about the building and we will confirm what access is needed.
External mastic in Tyttenhanger: local notes
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. Historic houses like Batchwood Hall (about 3.3 miles north-west) are a reminder that the area around Tyttenhanger has older buildings as well as new. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth.
If you let a flat or house near St Albans station, outside joints that have cracked can let damp into a rental, so check them between lets. Managing a site like Nicholas Breakspear School? Then its movement joints, gutters and trims need looking after like any other building’s. If you live in an older home near Church of St Mark, an extension built onto an older house moves differently, and the joint between them takes the strain.
Tyttenhanger is about 2 miles south-east of St Albans, in Hertfordshire. If you need external mastic in Tyttenhanger, it’s easy to get a quote: please ring 0345 464 0079 or drop us an email. We cover Hertfordshire from our Crawley base. 381 places in Hertfordshire are on our list, from the larger towns to small villages. For nearby work, see our London page.
All of AL4 is within our area for external mastic. External mastic is available to properties on Highfield Lane and Tyttenhanger Green. Nearby, we also carry out external mastic in London Colney (1 mile south), Sleapshyde (1 mile north-east), Smallford (2 miles north-east), Broad Colney (2 miles south) and Colney Heath (2 miles east). Further out, we also cover Watford (7 miles south-west), Hemel Hempstead (7 miles west), Stevenage (13 miles north), Welwyn Garden City (6 miles north-east), Harpenden (6 miles north-west) and Hitchin (15 miles north).
Landmarks near Tyttenhanger
Locally, jobs take us to homes and businesses close to The Plough pub, Highfield Park and Windermere Primary School. The closest station to Tyttenhanger is St Albans station, about 1.7 miles north-west of the centre. Other landmarks nearby include Hill End Hospital (0.9 miles north-west) and St Albans Musical Museum (1.9 miles north-west). For a walk, there’s Colney Heath Local Nature Reserve and Verulamium Lake.
What sealant work cannot fix
In fairness, some problems need a different trade:
- Rising or penetrating damp from elsewhere in the wall
- Cracks in the bricks or render themselves, away from the joints
- Cutting new joints into brickwork, which is building work rather than sealant work
If you are not sure, just phone 0345 464 0079 or send us an email and we’ll give you a straight answer before you book.
What we seal
- Concrete & block
- Brickwork movement joints
- Façade panels
- Joints between brick and frames
- Render & cladding joints
- Copings & trims
How it works
There isn’t much for you to do on the day. Point us to the joints and we will get on with it. The work itself takes a few hours for a handful of joints, longer for a whole elevation, including the tidy-up. Somewhere like Tyttenhanger needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Backing rod goes in so the sealant can stretch between the two faces.
- We prime the faces where required.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Before we arrive
- Tell us about any water getting in
- Where the joints are inside, avoid wetting them before we arrive
- Tell us if parking is tricky
How to get a quote
For external mastic in Tyttenhanger, call 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and you will get a clear quote before we start.
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Quotes for external mastic in Tyttenhanger
Some jobs are bigger than they look, and some smaller. The main factors:
- The number and length of the joints
- Whether there’s mould to deal with
- The product the joint needs
- The old material and how stubborn it is
Rather than a set price list, we look at what your job involves: the amount of work, the old material and the access. You will know the price before we begin.
What to tell us for a quote
Before you ask for a quote, have a think about:
- If someone has resealed it before
- A few photos by email, if you can
- How many joints, rooms or windows are involved
- If it’s domestic, commercial or a hotel
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we will talk you through what we’d do. When it suits you, call 0345 464 0079 or send us an email.
Keeping the joints in good condition
No joint lasts for ever, but care makes a real difference. A few tips:
- Don’t let climbing plants root in the sealant
- Point out the joints to other trades
- Act on the first splits you see
- Check the sealant is paintable before painting near it
Keep pressure washers away from the sealant. A strong jet can damage the edges of the bead over time.
Leaks behind façade panels and render often go unseen. By the time there’s a damp patch, the damage can be well established, so it’s worth resealing at the first signs.
Work for landlords, hotels and businesses
If you manage several properties in or around Tyttenhanger, jobs at different addresses can go on one quote. Just tell us the addresses and what each one needs, and pictures by email help.
Whether it’s one flat or a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
What the job involves on each surface
Joints between dissimilar materials
Different materials may need different primers. We prepare both faces so the sealant bonds properly.
Copings and trims
Coping and trim joints face rain and sun head on. Each is resealed with a weatherproof, flexible sealant.