Greater London · England
Window Mastic in Poplar
Specialist window mastic for Poplar: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Gaps between the frame and the inside reveal
- Black, perished sealant on frames
- Sealant in the wrong colour for the frame
Window mastic for homes and businesses in Poplar
Frames and walls don’t move together. Plastic and aluminium frames move with the temperature, while masonry stays fairly still. So the sealant has to stretch and recover, which is why we use a low-modulus product. We work on timber windows & doors, uPVC windows and composite doors, and common reasons people get in touch are a bead that doesn’t match the frame and gaps between the frame and the inside reveal.
Much of London’s older housing was built with timber sash windows, some still in place and some long since replaced. Either way, the mastic between frame and brickwork is what stops draughts and rain getting in, in Poplar as anywhere.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we will sort it.
- Where
- Poplar (E14, SE16, E22)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
DIY versus a professional finish
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it doesn’t work out, we can still put it right.
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions.
How we quote for window mastic
Some jobs are bigger than they look, and some smaller. The main factors:
- Mould in or behind the old joints
- How many rooms, windows or areas are involved
- The product the joint needs
- The amount of work
Leaving a failed joint normally makes the job bigger, not smaller, as water and mould keep getting in. If you’re unsure, ring 0345 464 0079 or send us an email and we will give you an honest view and a quote.
What to tell us for a quote
There’s no need for technical detail. Just tell us:
- The rough size of the job
- Whether it’s a home or a business
- If someone has resealed it before
- A few pictures by email, if you can
It all starts with a short chat. Describe the problem, the location and the size of the job, and we will explain how we’d tackle it. Whenever you are ready, ring 0345 464 0079 or drop us an email.
What we can’t put right
In fairness, some problems need a different trade:
- A frame that has rotted at the joint
- Damp coming through the wall itself rather than the frame joint
- A door that needs adjusting, rehanging or new seals
If in doubt, ring 0345 464 0079 or send us an email and we’ll say what we think before booking.
Joints and surfaces we work on
- Window sills
- Patio & French doors
- Composite doors
- Aluminium frames
- Timber windows & doors
- uPVC windows
Frames and glazing around Poplar
In London conversions and blocks, the lease decides who is responsible for the frames, so it’s worth checking before booking. London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Rented homes near Canary Wharf station change hands often, and renewing tired window mastic between tenants heads off draught and damp complaints. Homes close to St Peter's Church include some older properties, and frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Poplar is about 2 miles south-west of Plaistow, in Greater London. Jobs in Poplar get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. Across Greater London, we cover 764 places, Poplar among them.
We work across E14, SE16 and E22 for window mastic and the streets around it. Local streets include Market Way, Castor Lane and Dockyard Lane, and we cover them all. With the A102 and A1261 close by, Poplar is simple for us to get to. If you’re just outside Poplar, we cover London Docklands (1 mile south), Canary Wharf (1 mile south-west), Heron Quays (1 mile south-west), Coldharbour (1 mile south-east) and Blackwall (1 mile east). Larger places within reach include London (3 miles west), City of Westminster (6 miles west), Marylebone (6 miles west), Kensington (8 miles west), St Pancras (5 miles west) and Shoreditch (3 miles north-west).
Near you in Poplar
We work in homes and buildings around Bartlett Park, Langdon Park Secondary School and Our Lady and St Joseph Catholic Primary School. There’s a railway station in Poplar itself: Canary Wharf station. A little further out are Museum of the Book (0.8 miles north-west) and Poplar Hospital (0.6 miles north-east). Open spaces near Poplar include Lavender Pond and St. James's Park Lake.
Towns and villages near Poplar
More services for Poplar
How it works
Every visit runs the same way: we look at the joints together, mask and protect the surrounding surfaces, do the work and clear up. Most jobs take a few hours for a few frames, or a day or more for a whole house. In Poplar, 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.
- Each frame is looked over and we agree which ones need resealing.
- The old mastic is cut out and scraped back to clean surfaces.
- Where the gap is deep, backing rod goes in first.
- A flexible exterior sealant is applied in a colour to suit the frame.
- Every joint is tooled smooth and checked before we leave.
Getting ready for the visit
- Keep pets and children clear of the area while we work
- Clear items away from the joints we are working on
- On commercial sites, let us know about site rules
How to get a quote
Getting a quote is simple: let us know the job and the location, and roughly how big it is. A few pictures by email make the job easier to understand, and we will come back to you with a quote.
Advice
Your questions about window mastic in Poplar
Can you do window mastic in Poplar?
Yes. We work across London and the South East, and Poplar is part of that. You can ring 0345 464 0079 or send us an email and let us know what needs doing, and we’ll give you a clear quote.
Is parking an issue for window mastic in Poplar?
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.
Should I try DIY first?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
I’m a tenant. Can you help?
Yes, but check with your landlord or agent first. Many landlords are glad to have it sorted.
How much does window mastic cost in Poplar?
Size, access and the old material all affect the cost. Call for a quick quote.
How long does it take to reseal the windows on a house?
A few frames take a few hours. You’ll get a timescale with the quote.
What information do you need?
The location, the problem and the rough size of the job. Photos by email help too.
Are you insured?
Yes. We’re fully insured.
Why act early in Poplar
A quick bead over the top of old mastic looks like an easy fix, but it won’t grip old, dirty sealant. It peels before long, and water still gets in behind. Proper resealing starts with removing the old joint. 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 Poplar, the repair is bigger than the sealant job would have been.
The cost reflects the work involved, not a rough estimate. That’s why we ask about the job first and give you a clear price before work begins.
Why Poplar clients choose us
- A sealant colour to suit the surroundings
- White, clear, grey or another colour, product permitting
- Arbo and Everbuild products
- Fully insured
How to look after the new joints
How long the joints last depends on use and care. We suggest:
- Repaint timber before it’s bare
- Wash the frames with mild soapy water
- Clear any debris from frame drain holes
- Ventilate rooms so frames do not stay wet inside
Check the drainage slots in the frames aren’t blocked, so rain drains out rather than building up at the sealant.
A small gap around a frame only grows. As old mastic keeps shrinking, the gap widens, and heat escapes around the frame. Resealing closes it.
Common problems we fix in Poplar
A lot of older mastic was never designed to stay flexible. Once it’s rigid, every bit of frame movement pulls at it, leaving a hairline gap down one side.
If you can see any of these, it’s time to have the joints looked at:
- Leaking joints at the ends of sills
- Draughty joints inside around the window
- Sealant in the wrong colour for the frame
- Black, perished sealant on frames
For site and facilities teams at buildings such as Tower Hamlets College, larger buildings have plenty of frames, and the mastic around each one ages.
Comparing quotes
- What insurance they hold
- What happens if they find a problem under the old sealant
- Is the old sealant removed completely?
- What guarantee comes with the work