Greater London · England
Window Mastic in Shadwell
Mastic around window and door frames, sills and patio doors for Shadwell, backed by a 12-month guarantee. Ask us for a quote.
- Cold air getting in at the frame edge
- Cracked or shrunken mastic around the frame
- A bead that does not match the frame
Window mastic in Shadwell
If you can feel air around a shut window, the gap is often at the frame. Resealing that joint can make a room feel noticeably less draughty and quietens the whistle on windy days. Where the air is getting in through the window itself, we will say so. We work on window sills, aluminium frames and composite doors, and common reasons people get in touch are cracked or shrunken mastic around the frame and whistling draughts around closed windows.
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 Shadwell as anywhere.
You get a 12-month guarantee, the same in Shadwell as everywhere else we work.
- Place
- Shadwell (SE16, E1, E1W)
- Region
- Greater London
- Cover
- One year on every job
- Price
- A clear price before work begins
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Aftercare tips
No joint lasts for ever, but care makes a real difference. A few tips:
- Do not paint over the silicone
- Clean frames with a soft cloth and soapy water
- Walk round the house once a year and look at the joints
- Air rooms to keep condensation down around windows
Keep sill grooves and drainage slots clear, so water can run away instead of sitting against the joint.
Leaks usually show up in wet, windy weather, but sealant goes on best when frames and walls are dry. Sorting cracked mastic early means the joint is sound before the bad weather.
Work for landlords, hotels and businesses
We also work for property managers and facilities teams. We can quote a run of properties together, and we’re fully insured.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
What sealant work can’t fix
A few problems are outside what sealant work can do:
- Damp problems in the wall away from the window
- Faulty window hardware
- Draughts through the window seals rather than the frame
If you are not sure, just call 0345 464 0079 or drop us an email and we will give you a straight answer.
Joints and surfaces we work on
- Aluminium frames
- Patio & French doors
- uPVC windows
- Composite doors
- Window sills
- Timber windows & doors
Quotes for window mastic in Shadwell
The price is agreed before any work begins. It’s based on:
- Working hours on commercial sites
- The size of the job
- How easy the joints are to reach
- The product the joint needs
Instead of a standard rate, we look at what your job involves: how many joints, what’s in them now and how we reach them. You’ll know the price before we begin.
Asking for a quote
You do not need to know the technical terms. Just tell us:
- What’s wrong with the joints now
- Roughly how big the job is
- Any previous sealing or DIY work
- Where the job is, and your postcode
For a quote, call 0345 464 0079 or email us and tell us where the job is and what the problem looks like. We’ll send you a clear quote before any work starts.
How the job changes by surface
Aluminium frames
Metal frames expand in the sun and are often slim, with little room for error. A tidy bead in anthracite grey, black or a matching colour keeps the clean look.
Patio & French doors
Water at the foot of a door frame is not always the mastic: worn seals, blocked drainage slots or a poor threshold detail can be the cause. We look for the cause first.
What happens on the day
When we get to you, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. After that, the work takes most of a day for a typical house, less for a few frames. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. Mention any building rules, key holders or managing agents when you book.
- Each frame is looked over and we agree which ones need resealing.
- We remove the old mastic and clean the frame edge and wall.
- Where the gap is deep, backing rod goes in first.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- Every joint is tooled smooth and checked before we leave.
Preparing for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Mention any leaks or damp you’ve noticed
- On commercial sites, let us know about site rules
Ask for a quote
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is, and email photos if that is easy.
Advice
What we’re called out for in Shadwell
On timber frames, paint and putty build up around the joint. Old mastic gets painted over and cracks under the paint, and the wood moves with damp as well as heat.
Look out for these signs:
- Gaps between the frame and the inside reveal
- Damp patches on the reveal after heavy rain
- Mastic that’s falling out in pieces
- Untidy mastic left by window fitters
Schools such as Peter Hills with St Mary's and St Paul's CofE Primary School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s.
What to look for in a quote
- The length of the guarantee
- What happens if they find a problem under the old sealant
- What preparation is included
- Is VAT in the price?
Common questions in Shadwell
Is parking an issue for window mastic in Shadwell?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. The visit is then planned around what’s available.
Do you cover Shadwell for window mastic?
Yes. We work across London and the South East, and Shadwell is part of that. You can ring 0345 464 0079 or drop us an email and tell us what needs doing.
Can you do the inside joint as well?
Yes, we do both. Inside, the joint between frame and plaster is sealed neatly.
I’m a tenant. Can you help?
We are happy to deal with the tenant, landlord or agent. Just make sure your landlord agrees.
Can new sealant go over the old?
No, because it fails. The old sealant always comes out first.
Can you quote for more than one area?
Yes, and it often makes sense. Doing several areas at once is normally more efficient.
Do you work for hotels and businesses?
Yes. Hotels, offices and other businesses use us, and we’re fully insured.
What does window mastic cost?
Every job is different, so each one gets its own quote. To get one, ring 0345 464 0079 or drop us an email with a short description of the job.
What window mastic looks like in Shadwell
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. With historic houses such as Mansion House (about 1.9 miles west) nearby, there’s older building stock in the area around Shadwell as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
If you live in an older home near St Paul's Church, frames set in older brick or stone need a sealant that suits the wall as well as the frame. For landlords with property near Wapping station, sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Shadwell is about 1 mile south-east of Whitechapel, in Greater London. Wherever you are in the SE16 postcode area, our applicators can take on window mastic. Shadwell is one of 764 towns and villages in Greater London we cover for window mastic.
We work across the SE16, E1 and E1W postcode area for window mastic. Whether your property is on Swan Road, Thame Road and Brunel Road or anywhere close by, we can help. Being close to the A101 and A126, Shadwell is simple for us to get to. If you are just outside Shadwell, we cover Ratcliff (1 mile north), East End of London (1 mile north-west), Wapping (1 mile west), St George in the East (1 mile west) and Limehouse (1 mile north-east). We also work in nearby towns such as City of Westminster (5 miles west), Marylebone (4 miles west), Kensington (7 miles west), St Pancras (3 miles north-west), Walthamstow (6 miles north) and Hampstead (7 miles north-west).
Around Shadwell
In Shadwell, that means homes and buildings near Bacon's College, Bishopsgate Institute Special Collections and Archives and Russia Dock Woodland and the streets around them. Other local landmarks include Prospect of Whitby pub (within half a mile west) and St Mellitus College (0.6 miles west). Shadwell has its own railway station: Wapping station. Nearby you will also find St Olave's Hospital (0.8 miles south-west) and The Pumphouse Educational Museum (less than half a mile east). For a walk, there’s Lavender Pond and Tower Hill.