Construction Mastic in Rotherhithe
We carry out mastic packages for new-build and refurbishment projects in Rotherhithe. Send photographs or drawings for a fixed quote.
- Caulk cracking where joints are moving more than expected
- New external sealant already peeling away
- Oversized or tapered gaps around new frames
Construction mastic across Rotherhithe
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
Construction mastic in Rotherhithe, done properly
External mastic depends on the weather in a way most internal trades don’t. Cold or damp mornings, frost and condensation on frames can all hold external sealing up, so we plan elevations with the forecast and the programme in mind. Internal areas can typically carry on while the outside waits. Site teams most often ask us about a mastic package split between trades with no clear owner and snag items on joints that need redoing before handover, across window and door perimeters, brick and block movement joints and cladding and panel joints. Most enquiries from Rotherhithe start with one failed joint and grow into a wider look at the building: we look at the rest while we’re there and tell you what we find.
Building sites in London tend to be tight: small compounds, delivery slots and shared hoists and scaffold. Mastic is usually one of the last trades on each elevation or floor, so we keep to the programme and the order of trades the site sets.
Every job we finish is backed by a 12-month workmanship guarantee, in Rotherhithe as everywhere else we work. If a joint we sealed fails because of how it was installed, we come back and put it right.
- Where
- Rotherhithe (SE16, SE8, E1W)
- Wider area
- Greater London
- Guarantee
- 12 months on our workmanship
- Quotes
- Quoted before any work starts
- Phone
- 01277 525 020
- Last updated
- 3 November 2026
Cost factors for mastic packages
Sealant work doesn’t have a standard rate, because every site is different. What we take into account:
- The size and state of each joint
- Whether the work must be split into stages
- How much existing material needs removing
- Any access equipment needed
Quantities, awkward access and phased working all shape the price. Site requirements like inductions and permits play a part as well, along with the time of year for external work.
Before you send an enquiry
To price the job accurately, we need to understand the site. Send us:
- What the building is and how it’s used
- A wide shot and a close-up of the area
- Specification clauses that apply
- Access details, including height
We quote a fixed sum against the scope you give us, so the cost is agreed before work starts. To ask for one, give us a call on 01277 525 020 or email a schedule or drawings.
Common questions from Rotherhithe clients
Do you take on jobs in Rotherhithe where loading and access are tightly controlled?
Yes, we plan every London job around the building’s own access rules. Send the building rules and access times with your enquiry. The ULEZ covers the whole of Greater London, which we allow for
Can you work on a hospital site such as Royal London Hospital?
Yes. We work in healthcare settings as well as offices and schools. We follow the site’s permits, sign-in and infection-control procedures in every area.
Is it fine to apply new sealant on top of old?
No, never. Overlaying old sealant is a frequent cause of early failure, so everything comes out first.
Do you install fire-rated sealant as part of a package?
We install fire-rated sealant where it is the specified product, working to the specification and the manufacturer’s installation guidance. If the detail calls for collars, wraps or batts instead, we will tell you.
Can you handle several sites?
Yes. Multi-site work and planned programmes are a core part of the service, planned site by site to suit how each building is used.
How do you deal with asbestos in old sealant?
Some older mastics, especially in pre-2000 buildings, can contain asbestos. We check the asbestos register before cutting out old sealant in an older building, and work stops until any suspect material has been tested. Removing asbestos is a job for asbestos specialists, not us.
Are you CHAS accredited?
CHAS and Constructionline are both in place, and each applicator is CSCS-carded. Public liability insurance is in place.
Leave it or put it right?
Sealing over damaged or contaminated new joints might save a day, but it won’t last. New sealant laid on old or dirty sealant has nothing to bond to. Damaged joints are removed and resealed from clean faces. Repeat call-outs disrupt occupied London buildings, so cutting the old sealant out fully and doing it right once is the better route.
Cost follows what’s involved: removing old material, preparing the joints, the product, the access and how the work is phased. Call for a quote.
What you get with us
- CHAS accredited
- 12-month guarantee on workmanship
- Constructionline member
- Commercial sealant work since 2005
See how commercial sealant jobs are priced and our accreditations and insurance.
General trades versus a specialist
Using site staff can make sense for a small touch-up, but larger jobs are different: a specialist brings efficiency, a consistent finish and a 12-month guarantee.
A short, simple internal joint is often within reach of a maintenance team. Where it goes wrong is preparation: sealing over old material, sealing onto damp or dusty surfaces, or a product that can’t take the movement.
After the work
Cleaning and maintenance staff play a part too. Share these points with them:
- Keep product details for future maintenance
- Allow flexibility for external sealing in damp or cold weather
- Brief the final clean team to avoid blades near sealant
- Get the mastic subcontractor involved early in the programme
Brief the sparkle clean so they don’t scrape the new joints. Scrapers used on frames and worktops can nick or lift a new bead.
Snag items left to the last week put handover at risk. A planned close-out through each area as it completes keeps the list short and keeps handover on track.
Nearby places to Rotherhithe
Also in Rotherhithe
Diagnose, treat, sign off
We follow your site rules from the start: signing in, inductions and any permit to work. With the paperwork done, we take the joints in the sequence agreed with you. The ULEZ covers the whole of Greater London, and parking near a job is rarely simple. Let us know about any on-site parking or loading arrangements when you send the job details.
- Drawings, specification and programme come to us.
- Quantities are measured and a fixed price returned.
- The sequence is agreed with the site manager.
- Each area is sealed when it’s released.
- Joints are prepared, backed and sealed to the specification.
- After snagging, the work is handed over under our 12-month guarantee.
What we need from you
- Tell us which areas need to stay in use
- Arrange parking or a loading space
- Make sure the joints can be reached
Quotes
Need a figure for a tender or a budget? We’ll quote against your scope and drawings you can plan around. If you have questions first, call the office on 01277 525 020 or email a schedule or drawings.
Read more
New build and refits around Rotherhithe
A 2-mile radius around Rotherhithe takes in a good number of hotels. Hotel extensions and refits normally have to fit around bookings, so mastic dates are tight. As part of Greater London, Rotherhithe is inside the ULEZ, which applies to every van on site. Add booked deliveries and tight storage, and the mastic package needs planning with the site team.
Work at a hotel such as Canary Riverside Plaza Hotel, 0.8 miles north-east of Rotherhithe, tends to be programmed around bookings, mastic included. On a healthcare site such as Royal London Hospital, which lies north-west of Rotherhithe, new blocks and refurbishments go on while the hospital keeps running, so mastic work is sequenced carefully.
Rotherhithe is about 2 miles south-east of Whitechapel, in Greater London. We send applicators to Rotherhithe for mastic packages. Across Greater London, 764 places are covered, Rotherhithe among them.
Postcode districts covered here: SE16, SE8 and E1W. Buildings on Bush Road, Gomm Road and Swan Road are within our area. Rotherhithe sits on or close to the A200, which helps when planning parking and deliveries for the job. Sites close to Rotherhithe are covered too, including 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). Bigger towns within reach include 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).
Landmarks near Rotherhithe
Around Rotherhithe, our work takes us to commercial buildings near The Ship York pub, Bacon's College and Russia Dock Woodland. Rotherhithe has its own railway station: Canada Water station. Nearby you will also find St Olave's Hospital (0.5 miles west) and Tower of London (1.6 miles north-west). Not far away are St. James's Park Lake and Tower Hill.
When to call us in Rotherhithe
Frames installed with uneven gaps make perimeter sealing harder. Sealant has a range of joint widths it can cope with and gaps beyond it need packing or adjusting by the frame installer. We flag them early rather than filling them with sealant that won’t last.
Common reasons buildings call us in:
- A long mastic snag list close to completion
- New external sealant already peeling away
- Cracks opening in caulked internal joints
- Frame gaps too wide for sealant alone
Further education sites such as South Quay College, 0.9 miles to the east of Rotherhithe, are extended and refurbished from time to time, with mastic often programmed into the summer break.
What to look for in a quote
- Do they follow the manufacturer’s priming guidance?
- Their plan for phasing and protecting the area
- Their public liability cover
- Is the sealant right for the movement and the substrate?