Hertfordshire · England
External & façade joints in Westwick Row, Hertfordshire
External mastic across Westwick Row and nearby, with old sealant always removed completely and a 12-month guarantee.
- Cracked joints where brick meets render or frames
- Movement joints with cracked, split or missing sealant
- Joints where the bead has come unstuck
What we do, step by step
A visit follows a simple pattern: we check the joints, protect the area around them, do the work and clear up. It usually takes a few hours for a handful of joints, longer for a whole elevation. Somewhere like Westwick Row needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- The old mastic and anything lodged in the joint is removed.
- The joint faces are cleaned and primed where the sealant needs it.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
Before we arrive
- Clear items away from the joints we’re working on
- Mention any sign-in or site rules at work premises
- Tell us if parking is tricky
Getting a quote
We don’t publish a price list, because every job is different. Instead, we give you a clear price for your job. To arrange one, phone 0345 464 0079 or drop us an email.
Advice
External mastic for homes and businesses in Westwick Row
Joints between dissimilar materials, like brick against render or concrete against a steel frame, see movement from both sides. A flexible sealant bridges the two where a rigid filler would soon crack. We are often asked to deal with weathered mastic that no longer stretches and sealant pulling away from one side of the joint, across render & cladding joints, brickwork movement joints and façade panels.
Around Westwick Row, older buildings can be stone, brick or timber-framed, many with extensions added later. Where one material meets another is where water normally gets in, and they need the right sealant at the right depth.
You are covered for a year from the day we finish. If anything isn’t right with it, phone 0345 464 0079 or email us.
- Where
- Westwick Row (HP2, HP3)
- Wider area
- Hertfordshire
- Cover
- 12 months on all our work
- Price
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Landlords, agents and businesses in Westwick Row
In hotels, rooms out of use cost money, so we plan the work room by room. We’ve worked in hotels as well as homes and businesses.
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance that we can handle for you.
When something else is needed
It helps to know what we cannot do too:
- Cracks in the bricks or render themselves, away from the joints
- Adding movement joints to masonry that has none
- Failed render or damaged cladding panels
Not sure which it is? You can ring 0345 464 0079 or send us an email and we’ll tell you honestly.
Joints and surfaces we work on
- Façade panels
- Render & cladding joints
- Copings & trims
- Brickwork movement joints
- Concrete & block
- Joints between brick and frames
Walls and rooflines in Westwick Row
Historic houses like Batchwood Hall (about 3.1 miles north-east) are a reminder that the area around Westwick Row 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. Hemel Hempstead, which Westwick Row is part of, is one of England’s post-war new towns. Many homes date from the post-war decades and were built in phases, so neighbouring houses often have rooflines and wall joints of the same age, wearing out at the same time.
Managing a site like Leverstock Green Church of England Primary School? Then larger buildings have long runs of movement joint that eventually need resealing. For landlords with property near Apsley station, outside joints that have cracked can let damp into a rental, so check them between lets. For an older house near a landmark such as Church of Holy Trinity, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Westwick Row is about 2 miles east of Hemel Hempstead, in Hertfordshire. Westwick Row gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Across Hertfordshire, we cover 381 places, Westwick Row among them. Our London page covers work nearby.
Here we cover the HP2 and HP3 postcode area for external mastic. Whether your property is on Pancake Lane, Delmar Avenue and Farm End or anywhere close by, we can help. Neighbouring places we cover for external mastic include Leverstock Green (1 mile west), Bennetts End (1 mile west), Pimlico (1 mile south), Adeyfield (1 mile west) and Hemel Hempstead (2 miles west). Larger places within reach include Watford (6 miles south), Stevenage (15 miles north-east), St Albans (4 miles east), Welwyn Garden City (10 miles east), Harpenden (6 miles north-east) and Hitchin (15 miles north-east).
Landmarks near Westwick Row
Around Westwick Row, our work takes us to homes and buildings near Longdean School, among other places. The nearest railway station is Apsley station, about 2.1 miles south-west of the centre. Other landmarks nearby include Village Arcade St Albans (3.4 miles east) and Hemel Hempstead Hospital (2.1 miles west). The countryside around Westwick Row includes Verulamium Lake and Long Deans.
What affects the cost of external mastic
Jobs vary more than people expect. What affects the quote:
- Whether there’s mould to deal with
- How many areas need sealing
- The size of the job
- How much old sealant there is and how hard it is to remove
We do not show prices on the website, because the cost depends so much on the job itself. Call for a quick quote and we’ll talk you through it.
Asking for a quote
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- Pictures of the joints, sent by email
- The address or postcode of the job
- What’s wrong with the joints now
- Any previous sealing or DIY work
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we’ll talk you through what we’d do. When it suits you, ring 0345 464 0079 or send us an email.
How to look after the new joints
How long the joints last depends on use and care. Here’s what we suggest:
- Wash walls gently around the sealant
- Fix overflowing gutters above sealed joints
- Never let anyone fill a movement joint with mortar
- Keep soil, plants and ivy away from the joints
Make sure anyone working on the wall later knows where the movement joints are. They must stay as flexible joints, never rendered or pointed over.
Gaps, plants or missing sealant in a joint are worth getting looked at. Early work is quicker and leaves a better finish.
Different surfaces, different methods
Copings and trims
Coping joints that leak let water straight down into the wall. Resealing them is a small job that protects a lot.
Joints between dissimilar materials
Joints where frames, sills or panels meet the wall are common leak points. The old joint is removed and a sealant that bonds to both sides goes in.
Westwick Row: your questions answered
Should the sealant in an older Westwick Row home be renewed?
Often, yes: cracked, shrunken or mouldy sealant has done its job. The key is cutting all the old sealant out, as new sealant won’t bond to it.
Do you work for landlords with property near Apsley station?
Yes, we work for letting agents and landlords. You can call 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before we start.
Do you take out the old sealant first?
Yes. All of the old material is cut out and the joint cleaned before resealing.
Can I add another job to the visit?
Yes. Just list everything you need and you will get one quote.
Can you seal joints between two different materials?
Yes. Different materials move at different rates, so a flexible sealant is needed where they meet. The sealant is matched to both sides.
Are you fully insured?
Yes, we’re fully insured for every job we do.
Will it make a mess?
No. The area is protected while we work and cleaned up afterwards.
What colours does the sealant come in?
We choose a sealant colour to suit the brick, stone or render, so the joint sits quietly in the wall. Exterior sealants come in a good range of colours.
Nearby places to Westwick Row
What else we do in Westwick Row
Why act early in Westwick Row
It often makes sense to reseal all the failing joints on an elevation together. Joints of the same age tend to fail together. Around Westwick Row, 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: the old material and how easily it comes out, any mould to treat, and whether the work is at height. We take all of that into account in your quote.
Why Westwick Row customers choose us
- A 12-month guarantee on all work
- White, clear, grey or coloured to suit, where the product allows
- Over 20 years’ experience
- We leave the area clean and tidy
Take a look at how sealant jobs are priced or customer reviews.