Greater London · England
External & façade joints in Tower Hill, Greater London
External mastic in Tower Hill from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Old sealant gone brittle and cracked
- Sealant pulling away from one side of the joint
- Joints pointed up with cement by mistake
External mastic in Tower Hill, done properly
We are ARBOMaster approved applicators, and each external joint gets a sealant suited to it. Some surfaces need a primer before sealing and we use one wherever it does. If you are dealing with damp patches traced to an open external joint and movement joints filled with mortar instead of sealant, we can put it right.
Working on the outside of a London home means planning access: shared paths, upper floors and parking. In Tower Hill, joints up high may need ladders or other access, which is worth talking through when you book.
The work is covered for a year after we finish. If anything isn’t right with it, phone 0345 464 0079 or send us an email.
- Location
- Tower Hill (SE1, E1, E1W)
- Region
- Greater London
- Guarantee
- A year, on every job
- Price
- A clear price before we start
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
What affects the cost of external mastic
The price is agreed before any work begins. It’s based on:
- How easy the joints are to reach
- How much old sealant there is and how hard it is to remove
- The size of the job
- How many areas need sealing
Instead of a standard rate, we look at what your job involves: the amount of work, the old material and the access. The price is agreed before we begin.
Helping us quote
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- Pictures of the joints, sent by email
- Where the property is
- The problem you’ve noticed
- The type of property
Call for a quick quote, or email us if that’s easier. Tell us about the joints that need doing and we will talk you through the work before giving you a price.
Places near Tower Hill
Other services in Tower Hill
What happens if it’s left?
Sealing over the top of old mastic does not hold for long. New sealant doesn’t bond well to old, weathered sealant, so we always take the old sealant out. Damp from a failed joint spreads quietly in older London brickwork and timber, and by the time it shows on a wall or ceiling in Tower Hill, the repair is bigger than the sealant job would have been.
The cost depends on the amount of work, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before any work starts, so you know where you stand.
What you get with us
- Anti-fungal sanitary silicone in wet areas
- Colour agreed with you before work begins
- ARBOMaster approved applicator
- We leave the area clean and tidy
How to look after the new joints
Joint life depends on how it’s used and looked after. We suggest:
- Get split or bare joints resealed while the damage is small
- Avoid pressure-washing directly into sealant joints
- Look over the joints every year, ideally after winter
- Clear growth from the base of walls and joints
Keep the joints clear of soil, plants and climbing growth. Anything that holds water against the joint wears it out sooner.
Act while the splits are small. Then it’s a straightforward cut-out and reseal with no damage behind it to deal with.
For landlords and businesses
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.
We work for letting agents and landlords as well as householders. Resealing between tenancies keeps a property looking cared for.
Common questions in Tower Hill
Is Tower Hill in your area for external mastic?
Yes. We work across London and the South East, and Tower Hill is part of that. Just ring 0345 464 0079 or email us with a few details of the job.
I let a flat near London Fenchurch Street station. Can you help?
Yes, landlords and agents are among the people we work for. You can phone 0345 464 0079 or email us with the details for a clear quote.
When is the sealant fully cured?
That depends on the sealant used, so please follow the time we give you when we finish.
Do you work at height?
It depends on the building. Send us pictures and a rough idea of the height.
What colours does the sealant come in?
We choose a sealant colour to suit the brick, stone or render so the joint blends in. There’s a wide choice of exterior colours.
Do you use backing rod?
Backing rod controls the sealant depth and keeps it off the back of the joint. That way it bonds to the two sides only and can stretch.
What do you need from me for a quote?
Where the job is, what the problem is and roughly how big it is. If you can, email a few pictures.
Should I try DIY first?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. Most DIY failures come from sealing over old material, wet joints or too much sealant.
How it works
Every visit runs the same way: we look at the joints together, mask and protect the surrounding surfaces, carry out the job and clear up. Most jobs take anything from a few hours to several days, depending on the building. In Tower Hill, flats, stairs and shared entrances are part of the routine. Mention any building rules, key holders or managing agents 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.
- Joint faces are cleaned back and primed if the sealant needs it.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
How to prepare
- Keep children and pets away from the work area
- For indoor joints, keep the area dry beforehand if you can
- Let us know about parking restrictions
Ask for a quote
To get a quote, call 0345 464 0079 or email us with the location and a short description of the problem. You’ll have a clear quote before we start.
Advice
How the job changes by surface
Brickwork movement joints
People sometimes point up a brick movement joint by mistake. If that is happened, we rake it out and reseal it properly where it can be done safely.
Cladding and façade panels
Panels heat up and cool down quickly, so the joint sealant has to cope with frequent movement. We choose the product to suit.
What we cannot put right
Honest advice matters more to us than a booking, so here’s what new sealant will not do:
- Render that is blown, hollow or coming away
- Adding movement joints to masonry that has none
- Rising or penetrating damp from elsewhere in the wall
If in doubt, phone 0345 464 0079 or email us and we’ll say what we think.
Joints and surfaces we work on
- Concrete & block
- Copings & trims
- Brickwork movement joints
- Joints between brick and frames
- Façade panels
- Render & cladding joints
What external mastic looks like in Tower Hill
London terraces and converted houses often share gutters, downpipes and walls, so check who is responsible for the outside before booking. With historic houses such as Mansion House (about 0.6 miles north-west) nearby, there’s older building stock in the area around Tower Hill as well as newer homes. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth.
If you look after a building such as The Aldgate School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. Tower Hill is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book. Letting a property close to London Fenchurch Street station? Then failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Tower Hill is about 1 mile north-east of London, in Greater London. For external mastic in and around Tower Hill, it’s easy to get a quote: please call 0345 464 0079 or email us. We cover Greater London from our Crawley base, Tower Hill included. Tower Hill is one of 764 places in Greater London where we work.
Every address in SE1, E1 and E1W is within our area for external mastic. External mastic is available to properties on Bush Lane, Swan Lane and Mark Lane. Being close to the A3 and A10, Tower Hill is simple for us to get to for external mastic. If you’re just outside Tower Hill, we cover Aldgate (1 mile north), Bishopsgate (1 mile north), Spitalfields (1 mile north), Whitechapel (1 mile north-east) and St George in the East (1 mile east). Larger places within reach include City of Westminster (3 miles west), Marylebone (3 miles west), Kensington (5 miles west), Walthamstow (6 miles north-east), Hampstead (5 miles north-west) and Ruislip (15 miles west).
What’s near Tower Hill
Locally, jobs take us to homes and businesses close to Bishopsgate Institute Special Collections and Archives, The Liberty Bounds pub and Fund Academy and the streets around them. Nearby too are St Mary-at-Hill (under half a mile north-west), William Curtis Ecological Park (within half a mile south) and St Michael's Catholic College (0.7 miles south-east). There’s a railway station in Tower Hill itself: London Fenchurch Street station. Well-known places in the area include Tower of London (within half a mile east) and London Bridge Hospital (under half a mile south-west). Open spaces near Tower Hill include Lavender Pond and Ludgate Hill.