Greater London · England
Picketts Lock External Mastic
Professional external mastic in and around Picketts Lock, with old sealant always removed completely and a 12-month guarantee.
- Panel joints letting water in
- Cracked joints where brick meets render or frames
- Moss and dirt in joints with no sealant left
Your questions about external mastic in Picketts Lock
Can you do external mastic in Picketts Lock?
Yes, Picketts Lock is within the area we cover. Our work covers London and the South East. Just phone 0345 464 0079 or send us an email with a few details of the job, and we will give you a clear price.
Can parking be tricky for a visit in Picketts Lock?
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.
Is it OK to fill a movement joint with cement?
No. Cement or mortar can’t stretch. Where a joint has been mortared, it can often be raked out and sealed properly.
Will it make a mess?
Not at all. The area is protected while we work and cleaned up afterwards.
When is the sealant fully cured?
Cure times vary by product. We tell you how long to leave it before we go.
Is there any odour?
Possibly a little. It fades as the sealant cures.
Why is there a gap in my brick wall?
It’s a deliberate gap that lets the wall expand and contract without cracking. It’s sealed with a flexible sealant, not mortar.
Can landlords and businesses book you?
Yes, we do. We work in homes, commercial premises and hotels.
External mastic for homes and businesses in Picketts Lock
External mastic is a job where short cuts show quickly. Overfilled joints, missing backing rod and sealant laid over old sealant all tend to fail early. We strip the joint back and start again. If you have moss and dirt in joints with no sealant left and weathered mastic that no longer stretches, we can help, on copings & trims, brickwork movement joints and façade panels alike.
Working on the outside of a London home means planning access: shared paths, upper floors and parking. For a home in Picketts Lock, tell us how high the joints are and how to reach the back of the building.
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
- Picketts Lock (N9, E4, N18)
- Wider area
- Greater London
- Cover
- One year on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Work for landlords, hotels and businesses
In hotels, rooms out of use cost money, so the work can be planned room by room around your bookings where we can. We’ve worked in hotels as well as homes and businesses.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
Walls and rooflines in Picketts Lock
With historic houses such as Bruce Castle (about 2.6 miles south-west) nearby, there’s older building stock in the area around Picketts Lock as well as newer homes. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth. In terraces and conversions, gutters and walls are often shared with the neighbours, so check who is responsible for the outside before booking.
Schools such as Delta Primary School are buildings too, and larger buildings have long runs of movement joint that eventually need resealing. Rented homes near Ponders End station change hands often, and split movement joints are easy to miss on a rental until damp shows inside. Picketts Lock is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
Picketts Lock is about 1 mile west of Chingford, in Greater London. If you need external mastic in Picketts Lock, please ring 0345 464 0079 or send us an email for a quick quote. We cover Greater London from our Crawley base, Picketts Lock included. Across Greater London, we cover 764 places, Picketts Lock among them. Our London page covers work nearby, about 9 miles away.
All of N9, E4 and N18 is within our area for external mastic. That includes homes and businesses on Ardra Road, Goodwin Road and Hennessy Road and the roads around them. Picketts Lock sits on or near the A1037, which makes travel easy. If you’re just outside Picketts Lock, we cover Chingford Mount (1 mile south-east), South Chingford (1 mile south), Chingford (1 mile east), Edmonton (1 mile west) and Ponders End (1 mile north-west). We also work in nearby towns such as London (9 miles south), City of Westminster (9 miles south-west), Marylebone (9 miles south-west), Kensington (11 miles south-west), St Pancras (8 miles south-west) and Shoreditch (7 miles south).
Near you in Picketts Lock
Locally, jobs take us to homes and businesses close to The King's Ford pub, Nightingale Academy and Pymmes Park. For rail, the closest station is Ponders End station, roughly 1.2 miles north of the centre. Nearby you’ll also find North Middlesex University Hospital (2 miles south-west) and The Epping Forest Museum (2.2 miles east). For a walk, there’s Pole Hill and Highams Park Lake.
Towns and villages near Picketts Lock
Other services in Picketts Lock
Should I try it myself first?
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
What we do, step by step
Every visit runs the same way: we look at the joints together, protect the area around them, do the work and tidy away. It generally takes a few hours to a few days, depending on the length of joint and the access. In Picketts Lock, 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.
- First, the joints are inspected and the access agreed.
- Every bit of old sealant and any mortar or debris is cut out.
- Joint faces are cleaned back and primed if the sealant needs it.
- We fit closed-cell backing rod to control the depth.
- We apply the sealant, tool it and check the whole run.
Getting ready for the visit
- Let us know if you’ve seen damp or leaks
- Let us know about stairs, lifts or work at height
- For indoor joints, keep the area dry beforehand if you can
Get a quote
Every job is quoted individually. Simply phone 0345 464 0079 or email us and describe the job.
Read more
When something else is needed
Some problems need a builder, plumber or other trade rather than us:
- Loose or hollow render, which needs re-rendering
- Movement that’s more than a sealant joint can take
- Walls that need new movement joints cut into them
Not sure which it is? You can phone 0345 464 0079 or email us and we will tell you honestly before booking.
What we seal
- Render & cladding joints
- Joints between brick and frames
- Concrete & block
- Copings & trims
- Brickwork movement joints
- Façade panels
What affects the cost of external mastic
Jobs vary more than people expect. What affects the quote:
- The size of the job
- Whether there’s mould to deal with
- Access and height
- When we can work, for business premises
What it costs depends on how much there is to do, how much old material has to come out and how easy the joints are to reach. You’ll have a clear quote before any work starts.
What we need to know
Photos by email are helpful but not essential. Try to tell us:
- The problem you’ve noticed
- Any access issues, like height or stairs
- Roughly how big the job is
- Pictures of the joints, sent by email
Need a quote? Please ring 0345 464 0079 or send us an email with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.
How to look after the new joints
Looking after new joints is easy, and it makes a real difference:
- Have failed joints looked at early
- Look over the joints every year, ideally after winter
- Point out the joints to other trades
- Keep movement joints as flexible joints, not mortar
Look over the joints once a year, ideally after winter. Splits, gaps at the edges or plants in the joint are early warning signs.
Water getting behind cladding or render can go unnoticed for a long time. By the time there’s a damp patch, the damage can be well established, so it’s worth resealing at the first signs.
How the job changes by surface
Render joints
Render is weaker at the surface than brick, so a sealant that stretches easily protects the edges. We prime where the product needs it.
Concrete and blockwork
Concrete faces can be dusty and porous, so cleaning and priming matter. We prime where the sealant needs it before the bead.