Greater London · England
External Mastic in Manor House
Sealing brickwork movement joints, render, cladding and façade joints for Manor House, backed by a one-year guarantee. Ask us for a quote.
- Plants rooting in failed movement joints
- Sealant pulling away from one side of the joint
- Cracked joints where brick meets render or frames
When to call us in Manor House
Sunlight, wet weather and frost wear exterior sealant down. Over the years it hardens, cracks on the surface and loses its give, so the joint eventually tears or comes away from one side.
The problems people generally mention when they call are:
- Joints pointed up with cement by mistake
- Panel joints letting water in
- Damp patches traced to an open external joint
- Joints where the bead has come unstuck
For an older house near a landmark such as Church of St Olave, the joints between older walls, newer extensions and the roofline need a sealant that can move.
What your quote should include
- How the surfaces are prepared before sealing
- What happens if the job turns out different
- What the cure time is
- What the quote includes, VAT included or not
External mastic in Manor House
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 mortar or filler would crack. If you have rain getting behind render or cladding at a joint and old sealant gone brittle and cracked, we can put it right, on copings & trims, brickwork movement joints and façade panels alike.
Modern London flats rely on sealed movement joints and cladding joints. Older terraces have their own weak points: gutter joints, roofline trims and the joint where an extension meets the original wall, and both kinds of building are found across London.
You’re covered for a year from the day we finish. If anything isn’t right with it, phone 0345 464 0079 or drop us an email.
- Location
- Manor House (N4, N16, N15)
- Region
- Greater London
- Cover
- 12 months on all our work
- Price
- A clear price before we start
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Towns and villages near Manor House
More services for Manor House
FAQs for Manor House
Is parking an issue for external mastic in Manor House?
In much of London, parking needs planning: a visitor permit or a bay close to the door helps a lot, so mention what’s available when you book.
Can you do external mastic in Manor House?
Yes. Our work covers London and the South East, and Manor House is part of that. Just phone 0345 464 0079 or email us with a few details of the job.
Where is Mr Mastic based?
Mr Mastic is based in Crawley. Our applicators cover Manor House.
Can I add another job to the visit?
Yes, we can. More than one area can be quoted together.
What’s an expansion joint in brickwork?
A vertical gap in a long brick wall is normally a movement joint. It lets the bricks expand without cracking and needs a flexible seal, not mortar.
Can tenants book the work?
Yes. Check with your landlord; we can send the quote to them too.
What do you put in the joint?
The product depends on the job: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. Brands we use include Arbo and Everbuild.
Is there any odour?
Some sealants have a smell while they cure, but it fades. Opening a window helps.
How the visit works
We bring everything the job needs with us, so there’s nothing for you to buy. After a quick look at the joints together, we protect the area and start. It normally takes a few hours to a few days, depending on the length of joint and the access. For a job in Manor House, parking and access are the things to plan: tell us about permits, visitor bays or off-street space, which floor we’re working on and whether there’s a lift.
- We start by checking each joint, agreeing the ones to redo and how we’ll reach them.
- The old mastic and anything lodged in the joint is removed.
- 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.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
How to prepare
- For business premises, tell us about site rules or sign-in
- Mention any tricky access
- Tell us about any previous sealing or DIY attempts
How to get a quote
To get a quote, call 0345 464 0079 or send us an email with the location and a short description of the problem. We’ll give you a clear price before any work starts.
Advice
Looking after it afterwards
How long the joints last depends on use and care. Here’s what we suggest:
- Show decorators and builders where the movement joints are
- Fix overflowing gutters above sealed joints
- Check external joints each spring
- Leave the joints unpainted unless we have said otherwise
Give the sealant the cure time we tell you before anything rubs against it. The surface skins over quickly, but full cure takes longer.
Leave a failed movement joint and water keeps getting into the wall. That can lead to damp patches, staining and frost damage.
Landlord and commercial work in Manor House
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
Landlords and letting agents in Manor House can book us as well as homeowners. Sealant work between tenants keeps a property looking cared for.
Manor House buildings and the weather
London terraces and converted houses often share gutters, downpipes and walls, so check who is responsible for the outside before booking. Historic houses like Bruce Castle (about 2.1 miles north-east) are a reminder that the area around Manor House 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.
Managing a site like Woodberry Down Community Primary School? Then its movement joints, gutters and trims need looking after like any other building’s. Rented homes near Harringay Green Lanes station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets.
Manor House is about 1 mile north of Highbury, in Greater London. Jobs in Manor House get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. 764 places in Greater London are on our list, from the larger towns to small villages.
Every address in N4, N16 and N15 is within our area for external mastic. If you need external mastic at a property on Vale Road, Eade Road and Swan Lane or a nearby road, our applicators can take on the job. With the A503 close by, Manor House is easy for our applicators to reach for external mastic. We also cover the places around Manor House: Harringay (1 mile north), St Ann's (1 mile north-east), Stoke Newington (1 mile south-east), Stamford Hill (1 mile east) and West Green (1 mile north). Within a short drive, we also cover London (5 miles south), City of Westminster (5 miles south-west), Marylebone (4 miles south-west), Kensington (7 miles south-west), St Pancras (3 miles south) and Shoreditch (3 miles south).
What’s near Manor House
In Manor House, that means homes and buildings near Woodberry Down School, Beaconsfield pub and Chestnuts Park, among other places. Other local landmarks include Arts and Media School Islington (0.9 miles west) and Church of St Andrew (0.7 miles east). There’s a railway station in Manor House itself: Harringay Green Lanes station. Well-known places in the area include Arsenal Football Club Museum (1.2 miles south-west) and Montfichet's Tower (4 miles south). Open spaces near Manor House include Woodberry Wetlands and Highgate Hill.
DIY versus a professional finish
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is.
A DIY attempt does not rule out a professional job. We cut it out and start again, so tell us about it when you ask for a quote.
Why it’s worth doing now in Manor House
An open joint keeps letting water into the wall with every downpour. In cold weather, frost can damage wet brick and render around the joint, so the damage spreads beyond the joint. In London conversions, one flat’s bathroom is often above another flat’s ceiling, so a small leak from tired sealant can mean a neighbour’s ceiling and a lot of disruption. Dealing with it early is far simpler.
Every job is a little different, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all play a part.
Why Manor House clients choose us
- 4.9 on Google from 180+ five-star reviews
- A sealant colour to suit the surroundings
- We agree the colour with you first
- Anti-fungal sanitary silicone in wet areas
Take a look at what affects the cost or our reviews.
When something else is needed
In fairness, some problems need a different trade:
- Walls that need new movement joints cut into them
- Failed render or damaged cladding panels
- Damp that isn’t coming from the joint
Not sure which it is? You can call 0345 464 0079 or send us an email and we will tell you honestly.
Surfaces we seal
- Render & cladding joints
- Concrete & block
- Brickwork movement joints
- Joints between brick and frames
- Copings & trims
- Façade panels