Construction and new-build mastic in Bow, Greater London
Planning work on a mastic package in Bow? We assess it, carry out the work and guarantee our workmanship for 12 months.
- Old sealant on a refurbishment that needs stripping before new work
- Sanitary sealant damaged by following trades
- Frame gaps too wide for sealant alone
Construction mastic in Bow
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
How we handle construction mastic in Bow
Refurbishment work needs a slightly different approach from new build. Old beads come out completely, as fresh silicone can’t grip old. After that, the joints are prepared and sealed to the specification. If you’re dealing with failed sealant in an existing building being refurbished and bath and shower joints scraped during the final clean, we can help. A specialist sealant contractor works differently from a general builder: in Bow, that means joint design, primers and backing rod as standard.
Around Bow, as across London, much of the work is refurbishing existing buildings as well as building new ones. Replacement windows, recladding and fit-outs leave perimeter and facade joints to seal, often next to people still using the building.
Building owners and contractors get the same cover: a 12-month guarantee on our workmanship. It doesn’t extend to damage, faults in the building or work by others, and we are upfront about that.
- Location
- Bow (E3)
- Region
- Greater London
- Guarantee
- 12 months on every job
- Quote
- A fixed quote before we start
- Phone
- 01277 525 020
- Updated
- 3 November 2026
What sealant work can’t fix
Honesty saves time and money. Fresh joints won’t solve:
- Approving fire stopping as compliant
- Specifying the product where the designer hasn’t
- Frame gaps too wide for sealant, which the installer needs to correct
Not sure which it is? You can call 01277 525 020 or send details through our quote form and we’ll tell you honestly before you book.
What we seal
- Cladding and panel joints
- Internal decorators’ caulk
- Brick and block movement joints
- Window and door perimeters
- Sanitary and kitchen joints
- Floor and skirting junctions
Commercial clients in Bow
Planned maintenance programmes are welcome: working through a building or an estate in stages that fit your budget. Sites in Bow can sit alongside others in a wider programme.
For main contractors, we work as the sealant subcontractor on new-build and refurbishment projects. We work to your programme, your specification and your site rules, and our applicators hold CSCS cards.
Quoting for work in Bow
A fixed quote reflects the actual work. It takes account of:
- Induction, permit and paperwork requirements
- Whether old sealant has to be cut out first
- Working within restricted access windows
- How much there is to seal
No two sites price the same: joint size, product, access and site hours all play a part. A fixed quote follows once we understand the job.
What we need to price the job
A few photographs plus some basic facts will normally do. It helps to include:
- Clear photographs of the problem areas
- Asbestos survey details if the building is older
- Whether the building will be occupied during the work
- When you need the work done
Every job follows the same four steps: send details, get a quote, we seal, guaranteed. To take the first step, ring 01277 525 020 or send photos by email.
Your questions answered
Will you plan work around the academic year at somewhere like Queen Mary University of London?
Yes, holiday working periods are the norm on campus jobs. We’re CHAS accredited and a Constructionline member, and paperwork such as RAMS is confirmed with the quote.
Do you cover business parks and estates near Bow, such as Old Ford Trading Estate?
Yes. We cover Bow and the area around it, including industrial estates, business parks and retail parks such as Old Ford Trading Estate. Photos and a short description are enough for a first look.
Can you come in just for snagging?
Yes. We clear snags by redoing joints rather than patching them, working to your handover date.
What does a mastic package normally include?
Inside and out: frame perimeters, movement joints, caulk where called for, sanitary and kitchens, all priced as one package.
Can weather delay the job?
For external joints, yes. The joint has to be dry and within the product’s temperature range, so frost, rain or cold mornings can delay outside work. Internal work is rarely affected.
What if there’s asbestos in the old mastic?
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. We don’t remove asbestos-containing materials.
Do you do fire-rated sealing on new builds?
Fire-rated sealant can be included where it’s specified, installed to the product’s tested detail. The design and sign-off belong to the designer, fire engineer or building control.
Also in Bow
Signs you need construction mastic in Bow
Swapping the specified sealant for a cheaper general-purpose product is a common cause of failure. A sealant that isn’t right for the substrate or the movement will fail ahead of time. We stick to the specified product, or put any alternative to you first.
Most enquiries start with one or more of the following:
- Early adhesion failures on new external joints
- Window and door perimeters that won’t pass inspection
- Snag items on joints that need redoing before handover
- Old sealant on a refurbishment that needs stripping before new work
Projects at colleges like Onelab College, 0.8 miles to the south-east of Bow, tend to run to term dates, so the mastic is planned tightly.
What to look for in a quote
- How the existing material will be dealt with
- Proof of insurance
- The named product and why it was chosen
- How joint depth will be controlled
How a job runs
Before any cutting starts, the area is protected: tape along each joint edge and covers over finishes, stock and equipment close by. On site, the work usually takes as long as the agreed sequence needs, which comes down to joint lengths, access and handover dates, and our waste is bagged and taken away as we go. In Bow, most buildings stay in use during the work, so zones and timings are agreed with whoever manages the building. Areas are handed back as each section is finished.
- Drawings, specification and programme come to us.
- We take off quantities and return a fixed quote.
- The sequence is agreed with the site manager.
- Each area is sealed when it’s released.
- Every joint is cleaned, set to depth and sealed with the specified product.
- After snagging, the work is handed over under our 12-month guarantee.
What we need from you
- Make sure the joints can be reached
- Let us know about inductions and permits
- Explain the parking and delivery arrangements
Get a fixed quote
Pricing a project or setting a maintenance budget? Send the scope and any drawings, and we’ll return a fixed quote that you can work with. For a chat about it beforehand, speak to us on 01277 525 020 or email a schedule or drawings.
Advice
Doing it in-house
Certain joints really need a specialist: fire-rated seals that must follow a tested detail, trafficked floor joints and external movement joints among them. Getting these wrong usually costs more in the end than doing them right.
Redoing a failed joint usually costs more than getting it right at the outset, since all of it has to come out and the faces be cleaned back again. That’s why many clients bring in a specialist from the beginning.
Mastic packages on Bow sites
The area within 2 miles of Bow holds plenty of hotels. Hotel schemes tend to have fixed reopening dates, so the mastic is programmed tightly with the other trades. Every borough of Greater London is inside the ULEZ, and that applies to contractors’ vehicles on any job in Bow. Delivery slots and scarce storage shape how and when the mastic goes in.
Units on estates such as Old Ford Trading Estate (under half a mile north-east of Bow) tend to be reclad and refitted as tenants change, and each job leaves cladding and perimeter joints to seal. For a contractor at a hotel such as City View Hotel (less than half a mile north-west of Bow), the mastic often has to be finished before a reopening date.
Bow is about 1 mile south-east of Hackney, in Greater London. If you are looking for construction mastic in Bow, we can help. Across Greater London, 764 places are covered, Bow among them.
Anyone looking for construction mastic in E3 gets the same process as the rest of our area: send details, get a quote, we seal, guaranteed. For a building on Trellis Square, Sheffield Square and Bromley High Street or nearby, send details and we will quote for mastic packages. Being close to the B142, Bow is easy to get to with materials and equipment. Close to Bow, our area also takes in Donnybrook Quarter (1 mile north), Old Ford (1 mile north-east), Mile End (1 mile south), Fish Island (1 mile north) and Bromley-by-Bow (1 mile south-east). A short drive away, we cover London (4 miles south-west), City of Westminster (6 miles west), Marylebone (5 miles west), Kensington (8 miles west), St Pancras (4 miles west) and Walthamstow (4 miles north).
What’s near Bow
Recent enquiries here include premises near Lord Tredegar Public House, Grove Hall Park and Mulberry UTC and the streets around them. For rail, the closest station is Hackney Wick station, roughly 0.9 miles north. Nearby you’ll also find V&A East (0.9 miles north-east) and St Clement's Hospital (under half a mile south). The countryside around Bow includes Hollow Pond and Old Ford Island.