Greater London · England
External Mastic in Bush Hill
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Bush Hill and across Greater London. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Hard, crazed mastic that has stopped moving
- Damp patches traced to an open external joint
- Movement joints with cracked, split or missing sealant
Can I do it myself?
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
External mastic for homes and businesses in Bush Hill
Low-level joints can normally be done from the ground. For joints higher up, give us some details of the building and we will confirm what’s needed to reach them safely. We are often asked to deal with plants rooting in failed movement joints and cracked joints where brick meets render or frames, on render & cladding joints, copings & trims and concrete & block.
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.
You get a one-year guarantee, the same in Bush Hill as everywhere else we work.
- Place
- Bush Hill (N21, EN1, EN2)
- Region
- Greater London
- Cover
- A year, on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
When to call us in Bush Hill
A lot of failed joints come down to preparation: joint faces that were dusty or damp, unprimed where they needed it, or still carrying old sealant. The sealant never bonds properly.
Look out for any of the following:
- Sealant that has lost its bond to the brick or render
- Damp patches traced to an open external joint
- Movement joints with cracked, split or missing sealant
- Old sealant gone brittle and cracked
Homes close to Grange Park Methodist Church include some older properties, and an extension built onto an older house moves differently, and the joint between them takes the strain.
What to look for in a quote
- The length of the guarantee
- Whether all the old sealant comes out first
- How the colour is chosen
- How hidden problems are handled
Why deal with it now?
It often makes sense to reseal all the failing joints on an elevation together. They’ve weathered the same way 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. Dealing with it early is far simpler for homes in Bush Hill.
A few things move the cost up or down: the old material and how easily it comes out, whether mould needs treating, and whether the work is at height. We take all of that into account in your quote.
Why us?
- A choice of colours where the product allows
- Colour agreed with you before we start
- 180+ five-star Google reviews
- Colour picked to suit the job
See what affects the cost and what customers say.
Questions from Bush Hill
Can you do external mastic in Bush Hill?
Yes, Bush Hill is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or drop us an email and let us know what needs doing.
Can you help a landlord with a rental near Grange Park station?
Yes. We work for letting agents and landlords as well as homeowners. Just call 0345 464 0079 or send us an email with the address and what needs doing, and we will give you a clear quote.
Can you seal joints between two different materials?
Yes. We cut out the old sealant, prepare both faces and reseal with a flexible exterior product. The colour is chosen to suit.
Should I point up the gap in my brickwork?
No, not if it’s a movement joint. Filling it with mortar defeats its purpose and can lead to cracking. We’ll reseal it with a flexible sealant.
Why is there a gap in my brick wall?
A vertical gap in a long brick wall is normally a movement joint. It gives the wall room to move.
Will you leave a mess?
We keep the work tidy. We protect what’s around the joints, and the area is left clean when we finish.
Is the work guaranteed?
Yes. There’s a 12-month guarantee on every job, wherever you are.
Which products do you use?
It depends on the joint: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. Brands we use include Arbo and Everbuild.
The process
We work through the job in order: protect, prepare, seal, tidy. For most jobs that takes a few hours to a few days, depending on the length of joint and the access, and the area is left clean. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Bush Hill. It helps if you can point us to a visitor permit or a bay close to the door.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- Old sealant and any debris are cut and raked out.
- The joint faces are cleaned and primed where the sealant needs it.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
Before we arrive
- Keep pets and children clear of the area while we work
- Mention any tricky access
- Where the joints are inside, avoid wetting them before we arrive
Getting a quote
Want a quote for external mastic? Please call 0345 464 0079 or email us with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.
Advice
Different surfaces, different methods
Cladding and façade panels
If the façade has a specified sealant, that’s what we use. Tell us what the building has when you get in touch.
Joints between dissimilar materials
Brick against render, concrete against metal, stone against timber: every change of material is a joint. We seal the joint with a flexible exterior sealant so the movement is taken up.
Nearby places to Bush Hill
Other services in Bush Hill
External mastic in Bush Hill: local notes
London terraces and converted houses often share gutters, downpipes and walls, so it’s worth agreeing who is responsible before work starts. Historic houses like Forty Hall (about 2.1 miles north) are a reminder that the area around Bush Hill 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.
As a London address, Bush Hill can be tricky for parking: tell us about permits, visitor bays or off-street space when you book. Rented homes near Grange Park station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets.
Bush Hill is about 1 mile south of Enfield, in Greater London. Wherever you are in the N21 postcode area, we cover external mastic for homes and businesses. Across Greater London, we cover 764 places, Bush Hill among them. London is on our list too, about 10 miles from Bush Hill.
Here we cover the N21, EN1 and EN2 postcode area for external mastic. You will find streets such as Park Avenue, Ridge Avenue and Private Road. If you are just outside Bush Hill, we cover Bush Hill Park (1 mile east), Enfield (1 mile north), Winchmore Hill (1 mile south-west), Enfield Chase (1 mile north-west) and Gordon Hill (2 miles north). We also work in nearby towns such as London (10 miles south), City of Westminster (9 miles south), Marylebone (9 miles south), Kensington (11 miles south-west), St Pancras (8 miles south) and Shoreditch (8 miles south).
Landmarks near Bush Hill
In Bush Hill, that means homes and buildings near Raglan Infant School, Green Dragon pub and Enfield Grammar School. Bush Hill’s nearest station is Grange Park station, about 0.5 miles west. Well-known places in the area include St Michaels Hospital (1.4 miles north) and Museum of Enfield (0.7 miles north). The countryside around Bush Hill includes Barfield Allotments Nature Park and Pole Hill.
What sealant work cannot fix
It helps to know what we can’t do too:
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Cracks in the bricks or render themselves, away from the joints
- Movement that’s more than a sealant joint can take
If you are not sure, just phone 0345 464 0079 or drop us an email and we will give you a straight answer.
Surfaces we seal
- Brickwork movement joints
- Copings & trims
- Façade panels
- Render & cladding joints
- Joints between brick and frames
- Concrete & block
What affects the quote in Bush Hill
We don’t publish a price list. What we look at:
- The type of sealant required
- When we can work, for business premises
- The size of the job
- Whether old sealant or filler has to be cut out
We don’t show prices on the website, because each job is priced on what it involves. Call for a quick quote and we will talk you through it.
Asking for a quote
You do not need to know the technical terms. It helps if you can tell us:
- Where the property is
- Pictures of the joints, sent by email
- The problem you’ve noticed
- Whether it’s a home or a business
To get a quote, call 0345 464 0079 or email us and tell us where the job is and what the problem looks like. You’ll have a clear quote before any work starts.