Greater London · England
Window Mastic in Aldgate
Window mastic for Aldgate, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Damp patches on the reveal after heavy rain
- Cracked sealant at the sill ends
- Gaps left after new windows were fitted
Window mastic for homes and businesses in Aldgate
Most frames have an outside joint and an inside one. The external joint is the weather seal; inside, the joint between frame and plaster stops draughts and tidies the reveal. Either or both can be done. If you’re dealing with mastic that has split away from the wall and leaking joints at the ends of sills, we can put it right.
London’s Victorian and Edwardian terraces were built with timber sash windows, and many still have them or their replacements. Either way, the mastic between frame and brickwork is what stops draughts and rain getting in, in Aldgate 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’ll sort it.
- Location
- Aldgate (E1, EC2A, SE1)
- Region
- Greater London
- Guarantee
- A year, on every job
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Work for landlords, hotels and businesses
In hotels, rooms out of use cost money, so we plan the work room by room around your bookings where we can. We have worked in hotels as well as homes and businesses.
From a single let to a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a one-year guarantee.
Questions from Aldgate
I let a flat near London Fenchurch Street station. Can you help?
Yes, rental work is part of what we do. Just call 0345 464 0079 or send us an email and tell us about the property, and we’ll send you a clear quote.
Can parking be tricky for a visit in Aldgate?
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.
Will the old sealant be removed?
Yes, every time. New silicone does not stick to old silicone, so the joint is cleaned back first.
Is it OK to seal over old sealant?
No. Fresh sealant does not stick to old sealant, and it traps any mould or water underneath. We remove it all first.
Can you seal the gap between the frame and the plaster indoors?
Yes. Draughts often come through the inside gap too, so sealing both is often worthwhile.
Will resealing my frames help with draughts?
Yes, where the draught is at the frame edge. We check where the draught is before work begins.
What sealant do you use?
Quality sealants from brands including Arbo and Everbuild, picked for each joint. We’ll tell you what we’re using and why.
Is it worth trying it myself?
That depends on the joint. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.
What affects the quote in Aldgate
There’s no set price list, because no two jobs are the same. What we look at:
- Whether old sealant or filler has to be cut out
- The type of sealant required
- The number and length of the joints
- When we can work, for business premises
We don’t show prices on the website, because each job is priced on what it involves. For a quick quote, please phone 0345 464 0079 or send us an email and we’ll talk you through it.
Helping us quote
When you call or email, these details help:
- Photos by email, if that’s easy
- How we’d reach the joints
- Any previous sealing or DIY work
- How many joints, rooms or windows are involved
There’s no standard price list. Instead, your job gets its own clear quote. To arrange one, ring 0345 464 0079 or drop us an email.
Surface by surface
Window sills
Every drop off the glass ends up on the sill, so the joints at each end and underneath matter. Each is cleaned out and resealed.
Patio & French doors
Patio and French doors have the longest joints on most houses. Most leaks start at the bottom corners, so they get particular care.
What happens on the day
At the end, we look at the finished work together and explain the cure time. The work normally takes a few hours for a handful of frames, longer for a whole house, depending on the size of the job. For a job in Aldgate, parking and access are the things to plan: tell us about permits, visitor bays or off-street space, which floor we’re working on and whether there’s a lift.
- We start by checking each window and door with you.
- We remove the old mastic and clean the frame and the wall.
- Where gaps are deep, backing rod goes in first.
- We apply a weatherproof sealant to match the frame and tool it neatly.
- Every joint is checked before we leave.
Getting ready for the visit
- For indoor joints, keep the area dry beforehand if you can
- Let us know about parking restrictions
- Plan for the work area to be out of bounds to pets and children
Getting a quote
To get a quote, phone 0345 464 0079 or email us and tell us where the job is and what the problem looks like. We’ll give you a clear price before any work starts.
Advice
Window mastic in Aldgate: local notes
In London conversions and blocks, the lease decides who is responsible for the frames, so check that before you book. Historic houses like Mansion House (about 0.5 miles west) are a reminder that the area around Aldgate has older buildings as well as new. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic.
If you look after a building such as The Aldgate School, its window and door frames need their mastic kept sound, just like a home’s. Rented homes near London Fenchurch Street station change hands often, and renewing tired window mastic between tenants heads off draught and damp complaints.
Aldgate is about 1 mile north-east of London, in Greater London. Whether you are in the middle of Aldgate or further out, we cover window mastic for every kind of property, from flats and houses to offices and hotels. Aldgate is one of 764 towns and villages in Greater London where we work for window mastic.
Every address in E1, EC2A and SE1 is covered for window mastic. If you need window mastic at a property on Bush Lane, Swan Lane and Mark Lane or a nearby road, we can help. Being close to the A3 and A10, Aldgate is simple for us to get to for window mastic. Close by, we work in Spitalfields (1 mile north-east), Bishopsgate (1 mile north-west), Tower Hill (1 mile south), Whitechapel (1 mile north-east) and City of London (1 mile west). We also work in nearby towns such as City of Westminster (3 miles west), Marylebone (3 miles west), Kensington (5 miles west), Walthamstow (6 miles north-east), Hampstead (5 miles north-west) and Ruislip (15 miles west).
Local landmarks in Aldgate
Around Aldgate, our work takes us to homes and buildings near Bishopsgate Institute Special Collections and Archives, Fund Academy and East India Arms. Nearby too are London Enterprise Academy (0.6 miles east), St Mary-at-Hill (less than half a mile south-west) and Finsbury Circus (0.5 miles north-west). There’s a railway station in Aldgate itself: London Fenchurch Street station. A little further out are Gabriel's Wharf (1.4 miles west) and Tower of London (within half a mile south). Not far away are St. James's Park Lake and Lavender Pond.
Do you need window mastic in Aldgate?
Joints that are too thin or too deep fail early. A skim of sealant over a wide gap soon tears, while a joint packed solid cannot stretch. Backing rod sets the right depth.
Any of these means the joints need attention:
- Gaps left after new windows were fitted
- Old mastic that has gone black or come away
- Water coming in at the bottom corners of a door
- Cold air getting in at the frame edge
In the older streets around St James Duke's Place, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
What to look for in a quote
- Whether you can choose the colour
- Who turns up on the day
- Whether all the old sealant comes out first
- What happens if they find a problem under the old sealant
Also near Aldgate
Also in Aldgate
What happens if it’s left?
Once mastic fails, rain can get between the frame and the wall. Over time that can mean damp patches, damaged plaster and rotting timber. A reseal is a much smaller job. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and once it shows in Aldgate, the repair is bigger than a sealant job.
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs, plus any working-time requirements on site. Ask us for a quote and we’ll go through it with you.
Why choose Mr Mastic in Aldgate
- We never seal over old sealant
- Sanitary silicone with an anti-fungal additive in wet areas
- A sealant colour to suit the surroundings
- Domestic, commercial and hotel work
See our cost guide and what customers say.
Looking after it afterwards
Aftercare is simple:
- Keep timber frames painted
- Ventilate rooms so frames don’t stay wet inside
- Clean frames with a soft cloth and soapy water
- Keep drainage slots and sill grooves clear
On timber frames, keep the paintwork in good order, since wood that gets wet swells and shrinks more. Keep paint off the silicone itself.
On timber windows, water behind the joint can lead to rot. Once wood has rotted, it needs repair before it can be sealed, so early resealing is worth it.