Greater London · England
External & façade joints in Seven Kings, Greater London
Our applicators work in Seven Kings on sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly and every job guaranteed for a year.
- Sealant pulling away from one side of the joint
- Moss and dirt in joints with no sealant left
- Panel joints letting water in
External mastic in Seven Kings, done properly
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 mortar or filler would crack. Common call-outs are for water getting into walls through failed joints and plants rooting in failed movement joints, on copings & trims, render & cladding joints and brickwork movement joints.
Working on the outside of a London home means planning access: shared paths, upper floors and parking. In Seven Kings, joints up high may need ladders or other access, which is worth talking through when you book.
Each job carries a 12-month guarantee.
- Location
- Seven Kings (IG3, IG2, IG1)
- Wider area
- Greater London
- Cover
- A year, on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
What we do, step by step
We bring everything the job needs with us, so you don’t need to buy or prepare anything. Once we’ve agreed what’s being done, the area is protected and the work begins. Most jobs take anything from a few hours to several days, depending on the building. In Seven Kings, flats, stairs and shared entrances are part of the routine. If the building has a concierge, managing agent or access rules, tell us when you book.
- We start by walking round the building and agreeing the joints and the access.
- 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.
- We fit closed-cell backing rod to control the depth.
- The exterior sealant is applied, tooled and checked along its length.
How to prepare
- Clear items away from the joints we’re working on
- Keep children and pets away from the work area
- On commercial sites, let us know about site rules
Getting a quote
It all starts with a short chat. Describe the problem, the location and the size of the job, and we’ll talk you through what we’d do. When it suits you, call 0345 464 0079 or email us.
Related advice
Seven Kings questions
Is parking a problem for a job in Seven Kings?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. That way the visit can be planned around it.
Do you cover Seven Kings for external mastic?
Yes. We work across London and the South East, and Seven Kings is part of that. Just phone 0345 464 0079 or drop us an email with a few details of the job, and we’ll give you a clear price.
Can you seal joints between two different materials?
Yes. Where different materials meet is one of the most common joints we seal. We use a flexible sealant suited to both surfaces with primer where required.
How do I get a quote for external mastic in Seven Kings?
The cost depends on the size of the job, access and how much old sealant has to come out. Call for a quick quote.
Can a movement joint be filled with mortar?
No. Cement or mortar cannot stretch, so the joint stops doing its job. If it has already been filled, we can normally cut it out and reseal it.
I rent my home. Can I book you?
We can work for tenants, landlords or agents. Get your landlord’s agreement first.
Where is Mr Mastic based?
Mr Mastic is based in Crawley. Our applicators cover Seven Kings, along with the rest of our area.
Are you ARBOMaster approved?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
Outside joints around Seven Kings
In terraces and conversions, gutters and walls are often shared with the neighbours, so it’s worth agreeing who is responsible before work starts. With historic houses such as Valentines Mansion (about 1.4 miles west) nearby, there’s older building stock in the area around Seven Kings as well as newer homes. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material.
For landlords with property near Seven Kings station, failed wall and movement joints let damp in, so they’re worth checking between tenancies. As a London address, Seven Kings can be tricky for parking: let us know about parking bays, permits or a driveway. If you live in an older home near St John the Evangelist, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Seven Kings is about 2 miles north of Barking, in Greater London. Every kind of property in Seven Kings can book us for external mastic, old or new, large or small. Every job comes with our 12-month guarantee. Seven Kings is one of 764 towns and villages in Greater London where we work. London is on our list too, about 10 miles from Seven Kings.
Postcode districts we cover here for external mastic: IG3, IG2 and IG1. We cover properties on New Road, Lynn Road and High Road and the roads around them. Main roads around Seven Kings include the A118, which makes travel easy. If you’re just outside Seven Kings, we cover Newbury Park (1 mile north-west), Ilford (1 mile south-west), Gants Hill (1 mile north-west), Barkingside (1 mile north-west) and Cranbrook (1 mile west). Larger places within reach include London (10 miles south-west), City of Westminster (11 miles west), Marylebone (11 miles west), Kensington (14 miles west), St Pancras (10 miles west) and Shoreditch (8 miles west).
Around Seven Kings
Around Seven Kings, our work takes us to homes and buildings near Palmer Catholic Academy and South Park. There’s a railway station in Seven Kings itself: Seven Kings station. Nearby you’ll also find The Brewery (3.6 miles east) and Redbridge Museum (1.2 miles south-west). Not far away are Hainault Lodge and Hollow Pond.
How we quote for external mastic
The quote reflects the job in front of us. We look at:
- Which sealant suits the joint
- Mould in or behind the old joints
- Whether old sealant or filler has to be cut out
- How many rooms, windows or areas are involved
Some things make a job bigger or smaller: the old material and how easily it comes out, whether mould needs treating, and whether we need extra access for height. Your quote takes all of that into account.
Asking for a quote
There’s no need for technical detail. Just tell us:
- How we’d reach the joints
- If someone has resealed it before
- Photos by email, if that is easy
- The type of property
Want a quote for external mastic? Please phone 0345 464 0079 or send us an email with a few details. You will know what we plan to do, and what it will cost, before any work begins.
How to look after the new joints
How long the joints last depends on use and care. We suggest:
- Do not let climbing plants root in the sealant
- Act on the first splits you see
- Check external joints each spring
- Avoid pressure-washing directly into sealant joints
Keep the joints clear of soil, plants and climbing growth. Anything that holds water against the joint wears it out sooner.
An open movement joint lets rain into the wall every time it pours. That can lead to damp patches, staining and frost damage.
Towns and villages near Seven Kings
What else we do in Seven Kings
How the job changes by surface
Render joints
Water behind render can lead to blown patches. Resealing the joints early keeps water out and helps it last.
Concrete and blockwork
The face of concrete or block is often dusty, so preparation is key. We prime where the sealant needs it.
For landlords and businesses
Whether it’s one flat or a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
Hotels need rooms back in use, so we plan the work room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
Should I try it myself first?
If you are set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it does not work out, we can still put it right.
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
Why it’s worth doing now in Seven Kings
Water gets in through a failed movement joint and can run behind render or cladding. Resealing early keeps the job to the joint itself, instead of the wall and finishes around it. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and by the time it shows on a wall or ceiling in Seven Kings, the repair is bigger than the sealant job would have been.
Leaving a failed joint generally makes the job bigger, not smaller, as water and mould keep getting in. If you’re not sure whether it needs doing, ring 0345 464 0079 or drop us an email for an honest opinion and a quote.
Why book with us
- A choice of colours where the product allows
- 12-month guarantee on every job
- Approved under the ARBOMaster scheme
- We leave the area clean and tidy
Take a look at how sealant jobs are priced or our reviews.