Greater London · England
Window & door mastic in Plashet, Greater London
Mastic around window and door frames, sills and patio doors for homes and businesses in Plashet and across Greater London. Fully insured, ARBOMaster approved and guaranteed for a year.
- Old mastic that has gone black or come away
- Leaking joints at the ends of sills
- White mastic on grey or black frames
Window mastic for homes and businesses in Plashet
Some gaps around frames are far deeper than they look. Packing it solid with sealant gives a joint that can’t flex, so deep gaps get backing rod first. The sealant then grips the two sides it should. We work on timber windows & doors, patio & French doors and window sills, and people most often call us about cracked internal joints between frame and plaster and gaps where the sill meets the wall.
From mansion-block windows to modern glazing in new flats, London has every kind of frame. Over the years, the sealant around them shrinks, cracks and pulls away, 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.
- Place
- Plashet (E6, E12, E7)
- Region
- Greater London
- Cover
- A year, on every job
- Quotes
- A clear price before we start
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
When something else is needed
We’d rather tell you now than do work that won’t last, so here’s what sealant cannot put right:
- Faulty window hardware
- A failed sealed unit that has misted up
- Soft or decayed wood in the frame
Not sure which it is? You can ring 0345 464 0079 or send us an email and we will tell you honestly.
Where we work in Plashet
- Aluminium frames
- Timber windows & doors
- Composite doors
- Window sills
- Patio & French doors
- uPVC windows
Nearby places to Plashet
Also in Plashet
Should I try it myself first?
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions.
Some sealant jobs are within reach of a careful DIYer, 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.
How the visit works
We work through the job in order: protect, prepare, seal, tidy. Typically it takes most of a day for a typical house, less for a few frames, and the area is left clean. 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.
- First, we confirm safe access to each frame.
- Old, cracked mastic is removed completely.
- The surfaces are cleaned and left dry.
- Deep voids are backed, then the sealant is gunned in.
- The joint is shaped to shed water and the area tidied.
How to prepare
- Mention any leaks or damp you’ve noticed
- Let us know about parking restrictions
- Move anything stored near the joints
How to get 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 pictures if that’s easy.
Read more
Questions from Plashet
Do you cover Plashet for window mastic?
Yes. Our work covers London and the South East, and Plashet is part of that. You can call 0345 464 0079 or email us and let us know what needs doing.
Can parking be tricky for a visit in Plashet?
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.
How do I get a quote for window mastic in Plashet?
It depends on the job, so we quote each one individually. For a quick quote, phone 0345 464 0079 or email us with a short description of the job.
Can you seal over the old sealant?
No. New silicone won’t bond to old silicone, and anything trapped underneath, including mould and water, stays there. It all has to come out first.
Can you seal the gap between the frame and the plaster indoors?
Yes. Plenty of draughts come through the inside joint as well as the outside, so it can be worth sealing both.
I’m a tenant. Can you help?
Yes. Check with your landlord; we can send the quote to them too.
Do you remove the old sealant?
Always. Sealing over old sealant is the main reason resealing fails early, so we never do it.
When is the sealant fully cured?
Cure times vary by product and the temperature. We tell you how long to leave it before we go.
Keeping the joints in good condition
To keep the joints looking good and working properly:
- Don’t paint over the silicone
- Check the mastic once a year
- Use gentle cleaners on frames and sealant
- Repaint timber before it’s bare
Keep sill grooves and drainage slots clear, so rain drains out rather than building up at the sealant.
Water gets in quietly when mastic fails. Often the first sign is a damp patch inside or flaking paint on the reveal. Catching it early keeps the fix to a reseal.
Why act early in Plashet
Resealing frames is a short job: the visit takes anything from an hour or two to a full day, depending on how many frames there are. Leave it until water is coming in and you may need plastering and decorating as well. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and by the time it shows on a wall or ceiling in Plashet, the repair is bigger than the sealant job would have been.
Combining jobs into one visit is generally more efficient than separate visits, so tell us about everything that needs sealing. We will give you a clear quote for the lot.
Why book with us
- We are fully insured
- White, clear, grey or coloured to suit, where the product allows
- Arbo and Everbuild products
- Anti-fungal sanitary silicone in wet areas
How we quote for window mastic
Call for a quick quote. What matters most is:
- How many rooms, windows or areas are involved
- When we can work, for business premises
- The type of sealant required
- Whether there’s mould to deal with
A few things move the cost up or down: the old material and how easily it comes out, any mould to treat, and whether the work is at height. We take all of that into account in your quote.
Asking for a quote
Photos help, but a description is a good start. Please mention:
- If someone has resealed it before
- How we’d reach the joints
- Pictures of the joints, sent by email
- What’s wrong with the joints now
To get a quote, call 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. We will give you a clear quote before any work starts.
Frames and glazing around Plashet
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. In a converted house or block, who looks after the windows depends on the lease, so it’s worth checking before booking.
For site and facilities teams at buildings such as Plashet School, its window and door frames need their mastic kept sound, just like a home’s. In the older streets around Church of St Barnabas, frames set in older brick or stone need a sealant that suits the wall as well as the frame. Rented homes near Woodgrange Park station change hands often, and sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Plashet is about 2 miles north-east of Plaistow, in Greater London. Wherever you are in the E6 postcode area, our applicators can take on window mastic. Plashet is one of 764 towns and villages in Greater London where we work for window mastic. For nearby work, see our London page (7 miles or so).
Postcode districts we cover here for window mastic: E6, E12 and E7. If you need window mastic at a property on Fry Road, Edith Road and Hilda Road or a nearby road, we can help. We also cover the places around Plashet: Manor Park (1 mile north-east), Little Ilford (1 mile north-east), Upton Park (1 mile south-west), Upton (1 mile west) and Wallend (1 mile south-east). We also work in nearby towns such as London (7 miles south-west), City of Westminster (9 miles west), Marylebone (9 miles west), Kensington (11 miles west), St Pancras (7 miles west) and Shoreditch (6 miles west).
Landmarks near Plashet
In Plashet, that means homes and buildings near Monega Primary School, The Overdraft Tavern and West Ham Park and the streets around them. For rail, the closest station is Woodgrange Park station, about 0.5 miles north of the centre. Other landmarks nearby include Newham University Hospital (1.5 miles south) and Stratford Centre (2.1 miles west). For a walk, there’s Old Ford Island and Hollow Pond.
Landlord and commercial work in Plashet
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we will quote.