Greater London · England
External Mastic in Crews Hill
Sealing brickwork movement joints, render, cladding and façade joints for Crews Hill, backed by a 12-month guarantee. Call for a quick quote.
- Brick movement joints where the sealant has split
- Sealant that has lost its bond to the brick or render
- Moss and dirt in joints with no sealant left
Different surfaces, different methods
Concrete and blockwork
Wide joints in concrete need the depth controlling carefully. Backing rod sized to the joint sets it.
Brickwork movement joints
Clay brickwork grows slightly over its life and moves with the weather. That movement goes into the joint, so the sealant in it must stay soft and stretchy.
About our external mastic in Crews Hill
Low-level joints can usually be done from the ground. For joints higher up, give us some details of the building and we’ll confirm what’s needed to reach them safely. Common call-outs are for weeds or debris growing in open joints and water getting into walls through failed joints, across brickwork movement joints, render & cladding joints and copings & trims.
Modern London flats rely on sealed movement joints and cladding joints. Period houses have different weak points, such as gutter joints, trims and the line where an extension meets the old wall, and both kinds of building are found across London.
Your job is guaranteed for a year, as with all our work.
- Place
- Crews Hill (EN2)
- Region
- Greater London
- Guarantee
- One year on every job
- Price
- A clear price before we start
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
FAQs for Crews Hill
Do you cover Crews Hill for external mastic?
Yes. Our work covers London and the South East, and Crews Hill is part of that. You can ring 0345 464 0079 or drop us an email and let us know what needs doing, and we’ll send you a clear quote.
Is parking an issue for external mastic in Crews Hill?
In much of London, parking needs planning: a visitor permit or a nearby bay makes the day run more smoothly, so mention what’s available when you book.
How long does external mastic last?
That depends on the wall, the weather and the movement. Look for splits, hardening or edges coming away, and reseal at that point.
Will you leave a mess?
No. The area is protected while we work and cleaned up afterwards.
What do you need from me for a quote?
Just the basics: the address or postcode, what’s wrong and any access issues. Then phone 0345 464 0079 or send us an email.
Is it OK to fill a movement joint with cement?
No. A mortar-filled joint cannot move, so the wall cracks somewhere else instead. Use a flexible sealant with backing rod.
Do you seal joints where cladding meets other materials?
Yes. Where different materials meet is one of the most common joints we seal. The sealant is chosen to bond to both sides.
What is backing rod for?
The foam is closed-cell backing rod. It keeps the sealant at the right depth and bonded to the sides only.
When it is not the sealant
To be straight with you, there are a few things sealant will not fix:
- Failed render or damaged cladding panels
- Cracking across the wall rather than at a joint
- Adding movement joints to masonry that has none
If you’re not sure, just call 0345 464 0079 or send us an email and we’ll give you a straight answer before you book.
Where we work in Crews Hill
- Brickwork movement joints
- Concrete & block
- Copings & trims
- Joints between brick and frames
- Façade panels
- Render & cladding joints
Places near Crews Hill
Other services in Crews Hill
Crews Hill buildings and the weather
The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. In terraces and conversions, gutters and walls are often shared with the neighbours, so check who is responsible for the outside before booking.
As a London address, Crews Hill can be tricky for parking: tell us about permits, visitor bays or off-street space when you book. For site and facilities teams at buildings such as St John's CofE Primary School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. In the older streets around Church of St John the Baptist, an extension built onto an older house moves differently, and the joint between them takes the strain.
Crews Hill is about 3 miles south-west of Cheshunt, in Greater London. For external mastic in and around Crews Hill, please call 0345 464 0079 or email us for a quick quote. We cover Greater London from our Crawley base. 764 places in Greater London are on our list, large and small. For nearby work, see our London page.
Here we cover the EN2 postcode area for external mastic. Whether your property is on Rosewood Drive, Theobalds Park Road and Whitewebbs Road or anywhere close by, we can help. If you’re just outside Crews Hill, we cover Clay Hill (1 mile south-east), Gordon Hill (1 mile south-east), Bulls Cross (2 miles east), Forty Hill (2 miles south-east) and Enfield Chase (2 miles south). We also work in nearby towns such as London (13 miles south), City of Westminster (12 miles south), Marylebone (11 miles south), Kensington (13 miles south), St Pancras (11 miles south) and Shoreditch (11 miles south).
Near you in Crews Hill
We work in homes and buildings around Chace Community School and The Plough pub. There’s a railway station in Crews Hill itself: Crews Hill station. Well-known places in the area include Chase Farm Hospital (1 mile south) and Museum of Enfield (2.3 miles south). Open spaces near Crews Hill include Fir and Pond Woods and Bowyer's Water.
What affects the quote in Crews Hill
Jobs vary more than people expect. The main factors:
- How much there is to do
- The old material and how stubborn it is
- Whether there’s mould to deal with
- How many rooms, windows or areas are involved
The cost depends on the size of the job, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before we start.
Helping us quote
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- If it’s domestic, commercial or a hotel
- A few photos by email, if you can
- Any previous sealing or DIY work
- Where the job is, and your postcode
Every job is quoted individually. Just call 0345 464 0079 or email us with the details and send photos if you have them.
Why deal with it now?
It often makes sense to reseal all the failing joints on an elevation together. Joints of the same age tend to fail together and it means sorting access once. Converted houses in London often have a bathroom above someone else’s living room, and a slow leak from a failed seal can end up in the flat below. Putting it right early is much less trouble for homes in Crews Hill.
Homes and businesses are quoted the same way: how much there is to do, how we reach it and what it needs, along with when we can work on site. Call for a quick quote and we’ll explain what it covers.
Why us?
- Over 20 years’ experience
- Colour picked to suit the job
- Full insurance on every job
- You choose the colour before work begins
What happens on the day
We bring everything the job needs with us. Once we have agreed what’s being done, the area is protected and the work begins. Most jobs take a few hours to a few days, depending on the length of joint and the access. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. If the building has a concierge, managing agent or access rules, tell us when you book.
- We look at every joint and agree a colour to suit the wall.
- Failed sealant is removed back to clean, sound faces.
- 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
- Let us know about stairs, lifts or work at height
- Mention any parking rules near the property
- Keep children and pets away from the work area
How to get a quote
Asking for a quote is easy: let us know what needs doing and where. Photos by email help us understand the job, and we’ll come back to you with a quote.
Read more
Landlord and commercial work in Crews Hill
We also work for property managers and facilities teams. We can quote a run of properties together.
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
DIY sealant or a professional job?
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it doesn’t work out, we can still put it right.
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.