Greater London · England
External Mastic in Paddington Green
External mastic for Paddington Green, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Cracked joints where brick meets render or frames
- Sealant that has lost its bond to the brick or render
- Hard, crazed mastic that has stopped moving
External mastic in Paddington Green
Ground-floor and low-level joints are straightforward to reach. Where joints are higher up, tell us about the building when you get in touch and we will confirm what’s needed to reach them safely. We are often asked to deal with joints where the bead has come unstuck and plants rooting in failed movement joints, across concrete & block, render & cladding joints and brickwork movement joints.
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.
Big or small, it’s backed by our 12-month guarantee in Paddington Green and across Greater London.
- Where
- Paddington Green (W2, W1H, NW8)
- Region
- Greater London
- Guarantee
- One year on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
FAQs for Paddington Green
Do you work for landlords with property near London Paddington station?
Yes, we work for landlords and letting agents. You can ring 0345 464 0079 or send us an email with the address and a few details, and we’ll give you a fixed price before work begins.
Is parking an issue for external mastic in Paddington Green?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. The visit is then planned around what’s available.
Will you leave a mess?
No. We protect the surfaces around the joints, and we clear up the old sealant and our materials before we leave.
Do you work in Paddington Green?
Yes. We cover Paddington Green and the rest of Greater London, as part of our work across South East England, London and Scotland. To book, call 0345 464 0079 or email us.
Do I need to be at home?
Access is agreed with you when the job is booked. For inside work, that normally means someone being in.
Can you reach joints on upper floors?
It depends on the building. Send us pictures and a rough idea of the height.
Can I do it myself?
That depends on the joint. High-level, external movement and fire-rated joints are professional jobs, while a short indoor joint may be within reach.
Which products do you use?
Products from Arbo and Everbuild, among others, chosen to suit the joint. We explain the product when we quote.
Walls and rooflines in Paddington Green
With historic houses such as Winfield House (about 0.9 miles north-east) nearby, there’s older building stock in the area around Paddington Green as well as newer homes. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth. London terraces and converted houses often share gutters, downpipes and walls, so check who is responsible for the outside before booking.
For landlords with property near London Paddington station, outside joints that have cracked can let damp into a rental, so check them between lets. Paddington Green is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
Paddington Green is about 1 mile north-west of City of Westminster, in Greater London. Wherever you are in the W2 postcode area, we can carry out external mastic at your property. Across Greater London, we cover 764 places, Paddington Green among them.
Every address in W2, W1H and NW8 is within our area for external mastic. We cover properties on Harrow Road, Craven Road and Lanark Road. Paddington Green sits on or near the A5 and A40, which makes travel easy. Close by, we work in Paddington (1 mile south-east), Little Venice (1 mile west), Lisson Grove (1 mile north-east), Hyde Park Estate (1 mile south-east) and Connaught Village (1 mile south-east). Further out, we also cover London (4 miles south-east), St Pancras (3 miles east), Shoreditch (4 miles east), Walthamstow (8 miles north-east), Hoxton (4 miles east) and Whitechapel (5 miles east).
Local landmarks in Paddington Green
In Paddington Green, that means homes and buildings near Royal Society of Medicine Library, International Community School and Sir Alexander Fleming pub and the streets around them. Also close by are North Westminster Community School (less than half a mile east) and Kensington Gardens (0.9 miles south). Paddington Green has its own railway station: London Paddington station. Well-known places in the area include Harrods (1.5 miles south) and London Toy & Model Museum (0.6 miles south-west). Open spaces near Paddington Green include The Long Water and Greville Place nature reserve.
Looking after it afterwards
Aftercare is simple:
- Wash walls gently around the sealant
- Fix overflowing gutters above sealed joints
- Have failed joints looked at early
- Clear growth from the base of walls and joints
Do not let soil, plants or ivy build up against the new joints. Anything that holds water against the joint wears it out sooner.
A joint that has stopped moving pushes the movement elsewhere, often as cracks near the joint. Catch it early and you reduce the risk.
When to call us in Paddington Green
Weeds, moss and debris in a joint are a sign the sealant has gone. Roots and dirt hold water against the wall and make things worse.
Look out for these signs:
- Moss and dirt in joints with no sealant left
- Rigid filler in a joint that should flex
- Cracked joints where brick meets render or frames
- Sealant that has lost its bond to the brick or render
Schools such as Ark Paddington Green Primary Academy are buildings too, and its movement joints, gutters and trims need looking after like any other building’s.
What to look for in a quote
- What happens if the job turns out different
- What the quote includes, VAT included or not
- How much experience the applicator has
- Whether all the old sealant comes out first
Honest limits
New sealant cannot fix everything, and we’ll tell you before we start. Sealant will not put right:
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Render that’s blown, hollow or coming away
- Cracked brickwork or render that needs a builder or plasterer
If you’re not sure, just ring 0345 464 0079 or drop us an email and we’ll give you a straight answer before booking.
Where we work in Paddington Green
- Copings & trims
- Façade panels
- Render & cladding joints
- Joints between brick and frames
- Brickwork movement joints
- Concrete & block
DIY sealant or a professional job?
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
What the job involves on each surface
Render joints
Cracks along render joints let water in behind the coat. A sound joint keeps the render dry behind.
Concrete and blockwork
Concrete faces can be dusty and porous, so cleaning and priming matter. We prime where the sealant needs it before sealing.
How it works
We bring everything the job needs with us, so there’s nothing for you to buy. Once we have agreed what’s being done, 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. 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.
- Each joint is checked and the colour of the new sealant agreed.
- Failed sealant is removed back to clean, sound faces.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- We prime the faces where required.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Getting ready for the visit
- Let us know if you’ve seen damp or leaks
- Let us know about earlier repairs to the joints
- Tell us if parking is tricky
Getting a quote
Need a quote? Please phone 0345 464 0079 or email us with a few details. We will explain what we’d do and give you a clear price before we start.
Related advice
Why it’s worth doing now in Paddington Green
Pointing a movement joint with mortar might seem a neat fix, but it locks the joint solid. The movement then cracks the brickwork or render nearby. The correct repair is a flexible sealant with the right backing. 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 Paddington Green, the repair is bigger than the sealant job would have been.
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 Paddington Green clients choose us
- Any old sealant cut out fully, not covered over
- Sanitary silicone with an anti-fungal additive in wet areas
- Neat joints and a tidy finish
- Rated 4.9 stars on Google
Read how sealant jobs are priced or our reviews.