Greater London · England
External & façade joints in Broadfields Estate, Greater London
We cover Broadfields Estate for sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly and every job guaranteed for a year.
- Weeds or debris growing in open joints
- Old sealant gone brittle and cracked
- Leaking joints around cladding and façade panels
FAQs for Broadfields Estate
Do you cover Broadfields Estate for external mastic?
Yes, Broadfields Estate is within the area we cover. We work across London and the South East. You can call 0345 464 0079 or email us and tell us what needs doing.
Can parking be tricky for a visit in Broadfields Estate?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. The visit is then planned around what’s available.
What is a movement joint?
It’s a deliberate gap that lets the wall expand and contract without cracking. It should be filled with flexible sealant, never mortar.
Do you remove the old sealant?
Always. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
Can landlords and businesses book you?
Yes. As well as homeowners, we work for landlords, agents, businesses and hotels across Greater London.
Will you leave a mess?
We keep the work tidy. We protect what’s around the joints.
How long does the job take?
A typical job takes anything from a few hours to several days, depending on the building, including preparation and clearing up. Your quote will say how long we expect yours to take.
What do you need from me for a quote?
Tell us what needs doing and where, plus photos if you have them. If we need more, we will ask.
External mastic in Broadfields Estate, done properly
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. Typical jobs include plants rooting in failed movement joints and gaps where render, brick and frames meet, across render & cladding joints, concrete & block and façade panels.
London’s terraces and conversions often share walls, gutters and downpipes with their neighbours, so one failed joint can cause damp for more than one household. In a converted house in Broadfields Estate, it’s worth checking who is responsible for the outside before booking.
The work is guaranteed for twelve months. If something isn’t right with it in that time, tell us and we’ll put it right.
- Location
- Broadfields Estate (HA8, NW7)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Surface by surface
Brickwork movement joints
People sometimes point up a brick movement joint by mistake. If that’s happened, we rake it out and reseal it properly where it can be done safely.
Copings and trims
Coping joints that leak let water straight down into the wall. Sealing them early saves the wall below.
Also near Broadfields Estate
More services for Broadfields Estate
What we do, step by step
The work is kept neat and contained to the area we are working on, so you can get on with your day. Expect the work to take anything from a few hours to several days, depending on the building, and we explain the cure time before we leave. In a London area like Broadfields Estate, the main things to plan are parking and access: let us know about parking, the floor we’ll be working on and any lift or shared entrance.
- First, the joints are inspected and the access agreed.
- We cut out the old mastic and rake out anything in the joint.
- The faces are brushed clean and primed where the product requires it.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
How to prepare
- Mention any parking rules near the property
- For business premises, tell us about site rules or sign-in
- Let us know about stairs, lifts or work at height
Getting a quote
If you’re in Broadfields Estate and need external mastic, ring 0345 464 0079 or email us. Tell us what the problem is and where, and you will get a clear quote before we start.
Read more
Walls and rooflines in Broadfields Estate
Historic houses like Headstone Manor (about 4.1 miles south-west) are a reminder that the area around Broadfields Estate has older buildings as well as new. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material. In terraces and conversions, gutters and walls are often shared with the neighbours, so check who is responsible for the outside before booking.
If you live in an older home near St Andrew, old and new materials meet at the roofline and walls, which is where sealant earns its keep. Broadfields Estate is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Broadfields Estate is about 1 mile north of Edgware, in Greater London. Broadfields Estate gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a one-year guarantee. Broadfields Estate is one of 764 places in Greater London we cover for external mastic. We also work in London, around 12 miles away.
Here we cover the HA8 and NW7 postcode area for external mastic. We cover properties on Clay Lane, Mowbray Road and Cranmer Road. Neighbouring places we cover for external mastic include Edgware (1 mile south), Edgware Bury (1 mile north-west), The Hale (1 mile south-east), Deacon's Hill (1 mile north) and Burnt Oak (1 mile south-east). Larger places within reach include London (12 miles south-east), City of Westminster (9 miles south-east), Marylebone (9 miles south-east), Kensington (9 miles south), St Pancras (10 miles south-east) and Shoreditch (11 miles south-east).
Landmarks near Broadfields Estate
Around Broadfields Estate, our work takes us to homes and buildings near Edgwarebury Park, The Northgate School and London Academy and the streets around them. Broadfields Estate’s nearest station is Mill Hill Broadway station, roughly 1.4 miles south-east. Other landmarks nearby include Royal National Orthopaedic Hospital (1.4 miles west) and Elstree and Borehamwood Museum (2 miles north). The countryside around Broadfields Estate includes Darland's Lake and Edgware Way Grassland.
Can I do it myself?
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
When to call us in Broadfields Estate
Every building moves. Clay bricks expand slightly over their life, concrete and block shrink, and everything moves with temperature and wet. The sealant in the movement joints takes that strain.
These are the problems we’re asked about most:
- Failed seals between different materials
- Brick movement joints where the sealant has split
- Panel joints letting water in
- Joints where the bead has come unstuck
For landlords with property near Mill Hill Broadway station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
What your quote should include
- What the quote includes, VAT included or not
- What the cure time is
- How the joint is cleaned and prepared
- What insurance they hold
Quotes for external mastic in Broadfields Estate
Call for a quick quote. The main things that affect it are:
- Mould in or behind the old joints
- The size of the job
- Access and height
- The type of sealant required
Doing several joints on one visit is normally more efficient than separate visits. We will send you a clear quote for the lot.
What to tell us for a quote
There’s no need for technical detail. Just tell us:
- Whether it’s a home or a business
- How we’d reach the joints
- What’s wrong with the joints now
- Pictures of the joints, sent by email
It all starts with a short chat. Describe the problem, the location and the size of the job. When it suits you, call 0345 464 0079 or send us an email.
Leave it or put it right?
Done well, a resealed joint is a neat, straight line that suits the wall. A hurried job with smeared edges and no backing looks worse and fails sooner, so it pays to do it properly 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. Dealing with it early is far simpler for homes in Broadfields Estate.
The cost depends on the amount of work, how hard the old material is to remove and access to the work. We give a clear quote before any work starts.
Why us?
- 20+ years of sealant experience
- Quality sealants from Arbo and Everbuild
- Approved under the ARBOMaster scheme
- Colour picked to suit the job
Take a look at our cost guide and what customers say.
When it isn’t the sealant
We will always be straight with you, so here’s what sealant can’t fix:
- Loose or hollow render, which needs re-rendering
- Cracked brickwork or render that needs a builder or plasterer
- Cutting new joints into brickwork, which is building work rather than sealant work
If in doubt, ring 0345 464 0079 or email us and we’ll say what we think before booking.
What we seal
- Brickwork movement joints
- Façade panels
- Concrete & block
- Joints between brick and frames
- Render & cladding joints
- Copings & trims