Greater London · England
Window & door mastic in St George in the East, Greater London
Mastic around window and door frames, sills and patio doors in St George in the East, with a 12-month guarantee on every job. Call for a quick quote.
- Untidy mastic left by window fitters
- Cracked sealant at the sill ends
- Sealant in the wrong colour for the frame
About our window mastic in St George in the East
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. If you have hard, cracked sealant around windows and draughts coming in around windows and doors, we can put it right, whatever the surface.
London homes have every kind of window, from timber sashes in period terraces to aluminium and uPVC in newer blocks. The mastic around them dries out and cracks with age, letting in draughts and water.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we will sort it.
- Location
- St George in the East (E1, E1W, SE16)
- Region
- Greater London
- Guarantee
- One year on every job
- Quote
- A clear price before work begins
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
The process
When we arrive, we look over the joints with you first, so you know exactly what we are doing. Surfaces next to the work are protected before any work begins. Most jobs take anything from an hour or two to a full day, depending on how many frames there are. For a job in St George in the East, parking and access are the things to plan: let us know about parking, the floor we’ll be working on and any lift or shared entrance.
- First we look at every frame and agree the list.
- The old mastic is cut out and the surfaces cleaned back.
- We fit backing rod in deep gaps so the sealant is the right depth.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- Every joint is checked before we leave.
Before we arrive
- Mention if the joints have been sealed before
- Keep children and pets away from the work area
- Where the joints are inside, avoid wetting them before we arrive
Get a quote
It all starts with a short chat. Describe the problem, the location and the size of the job, and we will talk you through what we’d do. When it suits you, ring 0345 464 0079 or send us an email.
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Towns and villages near St George in the East
Also in St George in the East
How we quote for window mastic
Jobs vary more than people expect. The main factors:
- How much old sealant there is and how hard it is to remove
- How much there is to do
- Mould in or behind the old joints
- Whether the work is at height
Homes and businesses are quoted the same way: the amount of work, how we reach it and what it needs. Call for a quick quote and we will go through it with you.
What we need to know
To make quoting easier, please include:
- Whether it has been sealed before
- If it’s domestic, commercial or a hotel
- What’s wrong with the joints now
- The rough size of the job
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints.
What the job involves on each surface
Aluminium frames
Coated aluminium needs a compatible sealant and we avoid acetoxy silicones, which can react with some metals. Neutral-cure sealant is the safe choice.
uPVC windows
The frame is cleaned with a product that will not harm the plastic, then the sealant goes in between frame and wall and tooled smooth.
Your questions about window mastic in St George in the East
Is St George in the East in your area for window mastic?
Yes, St George in the East is within the area we cover. Our work covers London and the South East. You can phone 0345 464 0079 or send us an email and tell us what needs doing.
I let a flat near Shadwell station. Can you help?
Yes, landlords and agents are among the people we work for. Just phone 0345 464 0079 or email us with the address and what needs doing, and we’ll give you a clear price.
How many windows can you do in a day?
A handful of frames is a short visit. We confirm the timing with your quote.
What sealant do you use?
Quality sealants from brands including Arbo and Everbuild, picked for each joint. We will tell you what we’re using and why.
Are you ARBOMaster approved?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
Will the old sealant be removed?
Yes. Sealing over the old bead is the commonest cause of early failure, so we never do it.
Can I paint over the new sealant?
It depends on the sealant. Some hybrid sealants can be painted; silicone cannot. Mention any painting plans before any work starts.
Will there be a smell?
Some sealants have a smell while they cure, which fades as it sets. Ventilation helps.
Landlords, agents and businesses in St George in the East
Hotels need rooms back in use, so the work can be planned room by room. Hotel work is part of what we do, alongside homes and businesses.
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we will quote.
Windows and doors in St George in the East
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, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
In the older streets around St Peter's, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. As a London address, St George in the East can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
St George in the East is about 1 mile south-east of Whitechapel, in Greater London. Jobs in St George in the East get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Across Greater London, we cover 764 places, and St George in the East is one of them.
Postcode districts we cover here for window mastic: E1, E1W and SE16. Whether your property is on Glamis Road, Redmead Lane and Wapping Lane or anywhere close by, our applicators can take on the job. Main roads around St George in the East include the A1210 and A1211, which makes travel easy. Neighbouring places we cover for window mastic include Wapping (1 mile south-east), East End of London (1 mile north-east), Whitechapel (1 mile north-west), Tower Hill (1 mile west) and Shadwell (1 mile east). Within a short drive, we also cover City of Westminster (4 miles west), Marylebone (4 miles west), Kensington (6 miles west), St Pancras (3 miles north-west), Walthamstow (6 miles north) and Hampstead (6 miles north-west).
Local landmarks in St George in the East
Around St George in the East, our work takes us to homes and buildings near St Mellitus College, Mulberry School for Girls and Bishopsgate Institute Special Collections and Archives and the streets around them. Nearby too are Town of Ramsgate pub (within half a mile south), William Curtis Ecological Park (0.7 miles west) and St Mary-at-Hill (0.9 miles west). St George in the East has its own railway station: Shadwell station. A little further out are Jack the Ripper Museum (within half a mile north-west) and The Royal London Hospital (0.7 miles north). Not far away are St. James's Park Lake and Tower Hill.
Keeping the joints in good condition
Simple care keeps the joints in good condition. We recommend:
- Paint up to the joint, not over it
- Check the mastic once a year
- Keep jet washers away from the mastic
- Do not use solvent cleaners on the joint
Have a look at the joints once a year, ideally after winter. Small splits are simple to catch before they leak.
Leaks normally show up in wet, windy weather, but sealant goes on best when frames and walls are dry. Dealing with it when you first notice a crack avoids chasing leaks through the wet months.
Signs you need window mastic in St George in the East
Mastic ages in the weather. UV light hardens the outside of the bead, until it loses its stretch and starts to crack.
Look out for these signs:
- Gaps between the frame and the inside reveal
- Draughts coming in around windows and doors
- Cracked or shrunken mastic around the frame
- Untidy mastic left by window fitters
Rented homes near Shadwell station change hands often, and renewing tired window mastic between tenants heads off draught and damp complaints.
What to look for in a quote
- Is VAT in the price?
- Are they insured?
- Whether all the old sealant comes out first
- Who turns up on the day
DIY sealant or a professional job?
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.