Greater London · England
Window Mastic in Spitalfields
Window and door frames in Spitalfields need attention? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Gaps between the frame and the inside reveal
- Draughts coming in around windows and doors
- White mastic on grey or black frames
Keeping the joints in good condition
Once the sealant has cured, a few habits help it last:
- Keep paint and stain on wooden frames in good order
- Wipe condensation off the frames
- Clean frames with a soft cloth and soapy water
- Walk round the house once a year and look at the joints
Try not to touch the new joint while it cures, for as long as we advise. Keep jet washers away from the frames.
On timber windows, water behind the joint can lead to rot. Once wood has rotted, it needs repair before it can be sealed, so it pays to reseal before that happens.
Window mastic in Spitalfields
A window frame and the wall around it expand and shrink at different rates. 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 composite doors, uPVC windows and patio & French doors, and people most often call us about rain getting in at the frame or under the sill and draughty joints inside around the window.
From mansion-block windows to modern glazing in new flats, London has every kind of frame. The mastic around them dries out and cracks with age, letting in draughts and water.
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.
- Place
- Spitalfields (E1, EC2A, E1W)
- Region
- Greater London
- Cover
- A year, on every job
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Window mastic in Spitalfields: local notes
Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. With historic houses such as Mansion House (about 0.7 miles west) nearby, there’s older building stock in the area around Spitalfields as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic.
For site and facilities teams at buildings such as Makers Academy, larger buildings have plenty of frames, and the mastic around each one ages. As a London address, Spitalfields can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
Spitalfields is about 1 mile north-east of London, in Greater London. Every kind of property in Spitalfields can book us for window mastic, old or new, large or small. Every job comes with our 12-month guarantee. Across Greater London, we cover 764 places, Spitalfields among them.
All of E1, EC2A and E1W is within our area for window mastic. That includes homes and businesses on New Road, Mark Lane and Bell Lane and the roads around them. Spitalfields is on the A10 and A1202, so it’s easy for us to get to with everything needed for window mastic. If you’re just outside Spitalfields, we cover Whitechapel (1 mile east), Aldgate (1 mile south-west), Bishopsgate (1 mile west), Tower Hill (1 mile south) and Shoreditch (1 mile north). Further out, we also cover City of Westminster (3 miles west), Marylebone (3 miles west), Kensington (6 miles west), Walthamstow (5 miles north-east), Hampstead (5 miles north-west) and Ruislip (15 miles west).
What’s near Spitalfields
Locally, jobs take us to homes and businesses close to Finsbury Circus, Bishopsgate Institute Special Collections and Archives and Canon Barnett Primary School. Nearby too are St Mary-at-Hill (0.6 miles south-west), London Enterprise Academy (0.5 miles east) and Kings Stores pub (less than half a mile north-west). Spitalfields has its own railway station: London Liverpool Street station. Other landmarks nearby include Tower of London (0.6 miles south) and Gabriel's Wharf (1.5 miles west). The countryside around Spitalfields includes Tower Hill and Lavender Pond.
DIY sealant or a professional job?
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
How it works
On the day, there’s very little for you to do. Point us to the joints and we will get on with it. The job generally takes anything from an hour or two to a full day, depending on how many frames there are, including the tidy-up. For a job in Spitalfields, parking and access are the things to plan: let us know about parking, the floor we will 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.
- We apply a weatherproof sealant to match the frame and tool it neatly.
- We clear up and check every joint is fully closed.
Preparing for the visit
- Mention any leaks or damp you’ve noticed
- Mention any parking rules near the property
- Let us know about earlier repairs to the joints
Getting a quote
We quote each job on its own, so the first step is telling us about yours. Just call 0345 464 0079 or email us with the details and send pictures if you have them.
Read more
Do you need window mastic in Spitalfields?
Some failures date back to when the windows were fitted. Mastic laid onto dusty, damp or crumbling surfaces didn’t grip properly, so it comes away long before its time.
Common reasons people contact us are:
- Cracked internal joints between frame and plaster
- A bead that doesn’t match the frame
- Damp patches on the reveal after heavy rain
- Leaking joints at the ends of sills
If you let a flat or house near London Liverpool Street station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
What your quote should include
- What the quote includes, VAT included or not
- When the joint can take water or movement
- What happens if they find a problem under the old sealant
- What guarantee comes with the work
Landlords, agents and businesses in Spitalfields
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
Housing providers, facilities teams and property managers book us too in Spitalfields and across Greater London. We can quote a run of properties together, and we are fully insured for the work.
How we quote for window mastic
There’s no set price list, because jobs vary so much. The quote depends on:
- Whether there’s mould to deal with
- Which sealant suits the joint
- Access and height
- The old material and how stubborn it is
Leaving a failed joint generally makes the job bigger, not smaller, because water and mould keep working on it. If you are not sure whether it needs doing, ring 0345 464 0079 or email us for an honest opinion and a quote.
What to tell us for a quote
When you call or email, it’s useful to know:
- Any previous sealing or DIY work
- Pictures of the joints, sent by email
- Any access issues, like height or stairs
- What the problem is, such as mould, gaps, leaks or cracking
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and email photos if that is easy.
Why deal with it now?
Working on frames from a ladder with a sealant gun is not easy, especially on upper floors. A professional job is cut out properly, backed where needed and finished neatly, using a product chosen for the frame and wall. In a London flat, a failed joint rarely stays your problem alone: water from a shower or window joint can reach the flat below, and gaps in fire-stopping matter to everyone in the building.
Combining jobs into one visit normally makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. We will give you a clear quote for the lot.
What you get with us
- Every job guaranteed for a year
- Colour agreed with you before any work starts
- 20+ years of sealant experience
- Sealant colour chosen to suit
Read our cost guide and customer reviews.
FAQs for Spitalfields
Do you work for landlords with property near London Liverpool Street station?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or email us and tell us about the property, and we will give you a clear quote.
Can you do window mastic in Spitalfields?
Yes, Spitalfields is within the area we cover. Our work covers London and the South East. You can call 0345 464 0079 or send us an email and let us know what needs doing.
Can new sealant go over the old?
No. Fresh sealant does not stick to old sealant, and anything trapped underneath, including mould and water, stays there. It all has to come out first.
Is there any odour?
There can be a smell while the sealant cures, but it fades. Opening a window helps.
Does the work come with a guarantee?
Yes, for 12 months. A yearly look at the joints helps them last.
Do you work for hotels and businesses?
Yes. Commercial and hotel work is a large part of what we do. Working times can be discussed when we quote.
Do you seal inside as well as outside?
Yes. Inside, the joint between frame and plaster is sealed neatly, using a paintable sealant if you want to decorate.
How long does it take to reseal the windows on a house?
Allow a few hours for a few frames, or a day or more for a whole house. Access and how stubborn the old mastic is affect the time most.