Greater London · England
External Mastic in Rotherhithe
External mastic across Rotherhithe and nearby, with old sealant always removed completely and a 12-month guarantee.
- Sealant that has lost its bond to the brick or render
- Damp patches traced to an open external joint
- Cracked joints where brick meets render or frames
External mastic in Rotherhithe
Ground-floor and low-level joints are straightforward to reach. For joints higher up, give us some details of the building and we’ll confirm what access is needed. If you’re dealing with joints pointed up with cement by mistake and weeds or debris growing in open joints, we can help, whatever the surface.
Newer London blocks are built with movement joints in brick and render, and with cladding joints sealed with mastic. 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.
Big or small, you get the same 12-month guarantee.
- Place
- Rotherhithe (SE16, SE8, E1W)
- Wider area
- Greater London
- Cover
- A year, on every job
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Landlord and commercial work in Rotherhithe
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we’ll give you a quote.
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.
What happens on the day
Once we are on site, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. Most jobs then take anything from a few hours to several days, depending on the building. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Rotherhithe. It helps if you can point us to a visitor permit or a bay close to the door.
- Each joint is checked and the colour of the new sealant agreed.
- Failed sealant is removed back to clean, sound faces.
- Backing rod goes in so the sealant can stretch between the two faces.
- Primer is applied wherever the sealant needs it.
- We gun in low-modulus sealant and tool it neatly.
Getting ready for the visit
- Tell us if parking is tricky
- Keep pets and children clear of the area while we work
- Let us know about stairs, lifts or work at height
Getting a quote
Want a quote for external mastic? Please call 0345 464 0079 or send us an email and tell us about the job. We will explain what we’d do and give you a clear price before any work starts.
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Nearby places to Rotherhithe
More services for Rotherhithe
Rotherhithe buildings and the weather
With historic houses such as Queen's House (about 2.1 miles south-east) nearby, there’s older building stock in the area around Rotherhithe 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. London terraces and converted houses often share gutters, downpipes and walls, so check who is responsible for the outside before booking.
Rotherhithe is in London, so parking needs planning: let us know about parking bays, permits or a driveway. If you let a flat or house near Canada Water station, split movement joints are easy to miss on a rental until damp shows inside. For an older house near a landmark such as Holy Trinity Church, the joints between older walls, newer extensions and the roofline need a sealant that can move.
Rotherhithe is about 2 miles south-east of Whitechapel, in Greater London. Whether you are in the middle of Rotherhithe or further out, external mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Our area takes in 764 places across Greater London.
Postcode districts we cover here for external mastic: SE16, SE8 and E1W. If you need external mastic at a property on Bush Road, Gomm Road and Swan Road or a nearby road, we can help. Rotherhithe sits on or near the A200. Neighbouring places we cover for external mastic include Surrey Quays (1 mile south), Surrey Canal (1 mile south), South Bermondsey (1 mile south-west), Millwall (1 mile south-east) and North Greenwich (1 mile south-east). We also work in nearby towns such as City of Westminster (5 miles west), Marylebone (5 miles west), Kensington (7 miles west), St Pancras (4 miles north-west), Walthamstow (6 miles north) and Hoxton (3 miles north-west).
Local landmarks in Rotherhithe
In Rotherhithe, that means homes and buildings near The Ship York pub, Bacon's College and Russia Dock Woodland, among other places. There’s a railway station in Rotherhithe itself: Canada Water station. A little further out are St Olave's Hospital (0.5 miles west) and Tower of London (1.6 miles north-west). The countryside around Rotherhithe includes St. James's Park Lake and Tower Hill.
Quotes for external mastic in Rotherhithe
The price is agreed before any work begins. It takes into account:
- How much there is to do
- How easy the joints are to reach
- The type of sealant required
- Working hours on commercial sites
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs, plus any working-time requirements on site. Ask us for a quote and we’ll go through it with you.
What we need to know
What to tell us when you ask for a quote:
- If it’s domestic, commercial or a hotel
- Roughly how big the job is
- Whether it has been sealed before
- Access, such as stairs, a lift or height
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we will talk you through what we’d do. When it suits you, phone 0345 464 0079 or drop us an email.
Rotherhithe: your questions answered
Do you work for landlords with property near Canada Water station?
Yes. We work for letting agents and landlords as well as householders, and several properties can go on one quote. Just ring 0345 464 0079 or drop us an email with the address and what needs doing, and we’ll send you a clear quote.
Do you cover Rotherhithe for external mastic?
Yes, Rotherhithe is within the area we cover. We work across London and the South East. You can call 0345 464 0079 or email us and tell us what needs doing.
Is the work guaranteed?
Yes. Every job comes with our one-year guarantee.
Can you seal joints between render and window frames?
Yes. Where different materials meet is one of the most common joints we seal. The sealant is chosen to bond to both sides, primed where needed.
When is the sealant fully cured?
Cure times vary by product and the conditions. Before we leave, we’ll tell you the cure time.
Do you use backing rod?
We fit closed-cell backing rod wherever the joint depth needs controlling. It sets the sealant depth and prevents three-sided bonding, so the joint can move.
Is it messy?
Very little: the area around the joints is protected first, and we tidy up before we go.
Should I point up the gap in my brickwork?
No, not where the gap is a movement joint. Filling it with mortar defeats its purpose, and the wall may crack nearby. A flexible sealant is the right fill.
What the job involves on each surface
Copings and trims
Joints in copings, parapets and trims are exposed to the worst of the weather. Each is resealed with a weatherproof, flexible sealant.
Brickwork movement joints
Clay brickwork grows slightly over its life and moves with the weather. The movement joint takes that up, so the sealant in it must stay soft and stretchy.
DIY sealant or a professional job?
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it doesn’t work out, we can still put it right.
What happens if it’s left?
A failed movement joint lets water into the wall. Resealing early keeps the job to the joint itself, instead of the wall and finishes around it. Converted houses in London often have a bathroom above someone else’s living room, and a slow leak from a failed seal can end up in the flat below. Putting it right early is much less trouble.
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.
What you get with us
- Any old sealant cut out fully, not covered over
- Sanitary silicone with an anti-fungal additive in wet areas
- 4.9 on Google from 180+ five-star reviews
- Tidy, careful work
When something else is needed
Sealant isn’t the answer to every problem, and we’d rather say so up front. It won’t solve:
- Rising or penetrating damp from elsewhere in the wall
- Render that is blown, hollow or coming away
- Cracking across the wall rather than at a joint
If in doubt, ring 0345 464 0079 or email us and we will say what we think.
Where we work in Rotherhithe
- Brickwork movement joints
- Joints between brick and frames
- Render & cladding joints
- Copings & trims
- Façade panels
- Concrete & block