Greater London · England
Window & door mastic in Rotherhithe, Greater London
Window mastic in Rotherhithe from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Whistling draughts around closed windows
- Water coming in at the bottom corners of a door
- Gaps where the sill meets the wall
Common questions in Rotherhithe
Is Rotherhithe in your area for window mastic?
Yes. Our work covers London and the South East, and Rotherhithe is part of that. Just ring 0345 464 0079 or send us an email with a few details of the job.
Is parking an issue for window mastic in Rotherhithe?
In much of London, parking needs planning: a visitor permit or a bay close to the door helps a lot, so mention what’s available when you book.
Where are you based?
We work from Crawley. We cover Rotherhithe and the rest of Greater London.
Do you hold any approvals?
Yes. We hold ARBOMaster approved applicator status.
Do you remove the old sealant?
Yes. All of the old material is cut out and the joint cleaned before applying anything new.
Will there be a smell?
There can be a smell while the sealant cures, which fades as it sets. Ventilation helps.
Can I paint over the new sealant?
Not normally, if it’s silicone. We choose the product with your decorating in mind, so mention it when you book.
Can landlords and businesses book you?
Yes. We work for householders, landlords, letting agents, businesses and hotels across Greater London.
Window mastic in Rotherhithe
Behind a thin line of old mastic there’s sometimes a deep void. Filling it with sealant alone leaves a joint that can’t move properly, so deep gaps get backing rod first. The sealant then grips the two sides it should. If you have cracked or shrunken mastic around the frame and black, perished sealant on frames, we can help.
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.
We stand behind the work with a 12-month guarantee, so you are covered after we’ve gone.
- Where
- Rotherhithe (SE16, SE8, E1W)
- Wider area
- Greater London
- Cover
- A year, on every job
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Landlords, agents and businesses in Rotherhithe
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.
If you manage several properties in or around Rotherhithe, jobs at different addresses can be quoted together. Just tell us the addresses and what each one needs.
What affects the quote in Rotherhithe
We quote each job individually. These are the things that affect it:
- Whether the work is at height
- The product the joint needs
- How much old sealant there is and how hard it is to remove
- When we can work, for business premises
Combining jobs into one visit generally makes better use of the time than several visits, so tell us about everything that needs sealing. We’ll give you a clear quote for the lot.
Helping us quote
To make quoting easier, please include:
- How we’d reach the joints
- Where the job is, and your postcode
- A few photos by email, if you can
- The type of property
We quote each job on its own, so start by telling us what you need. Just call 0345 464 0079 or email us with the details.
The process
We work through the job in order: protect, prepare, seal, tidy. For most jobs that takes a few hours for a few frames, or a day or more for a whole house. In a London area like Rotherhithe, the main things to plan are parking and access: let us know about parking, the floor we will be working on and any lift or shared entrance.
- Each frame is looked over and we agree which ones need resealing.
- We remove the old mastic and clean the frame edge and wall.
- Deep gaps get closed-cell backing rod to set the depth.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- We tool each bead neatly and check every joint is closed.
Before we arrive
- Clear items away from the joints we’re working on
- Try not to wet indoor joints just before the visit
- Let us know if you’ve seen damp or leaks
Ask for a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and add pictures by email if you can.
Read more
Rotherhithe homes and the weather
Historic houses like Queen's House (about 2.1 miles south-east) are a reminder that the area around Rotherhithe 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. In London conversions and blocks, the lease decides who is responsible for the frames, so check that before you book.
Schools such as Alfred Salter Primary School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s. As a London address, Rotherhithe can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
Rotherhithe is about 2 miles south-east of Whitechapel, in Greater London. Every kind of property in Rotherhithe is covered for window mastic. Every job comes with our one-year guarantee. Rotherhithe is one of 764 towns and villages in Greater London where we work.
All of SE16, SE8 and E1W is within our area for window mastic. If you need window mastic at a property on Bush Road, Gomm Road and Swan Road or a nearby road, we can help. Rotherhithe sits on or near the A200, so getting to you is simple. We also cover Surrey Quays (1 mile south), Surrey Canal (1 mile south), South Bermondsey (1 mile south-west), Millwall (1 mile south-east) and North Greenwich (1 mile south-east). We also work in nearby towns such as City of Westminster (5 miles west), Marylebone (5 miles west), Kensington (7 miles west), St Pancras (4 miles north-west), Walthamstow (6 miles north) and Hoxton (3 miles north-west).
Landmarks near Rotherhithe
Typical jobs here are in homes near The Ship York pub, Bacon's College and Russia Dock Woodland, among other places. Rotherhithe has its own railway station: Canada Water station. Well-known places in the area include St Olave's Hospital (0.5 miles west) and Tower of London (1.6 miles north-west). The countryside around Rotherhithe includes St. James's Park Lake and Tower Hill.
What we cannot put right
In fairness, some problems need a different trade:
- A failed sealed unit that has misted up
- Broken hinges, locks or handles
- Rotten timber, which needs a joiner first
If in doubt, phone 0345 464 0079 or email us and we will say what we think before booking.
Where we work in Rotherhithe
- Aluminium frames
- Timber windows & doors
- Window sills
- uPVC windows
- Composite doors
- Patio & French doors
Towns and villages near Rotherhithe
What else we do in Rotherhithe
What we are called out for in Rotherhithe
Every frame moves through the day. Sun on a frame makes it expand, and it contracts again overnight, while the masonry beside it stays put. A sealant that can’t keep up eventually tears.
Any of these means the joints need attention:
- Black, perished sealant on frames
- A bead that does not match the frame
- Cracked internal joints between frame and plaster
- Untidy mastic left by window fitters
Rented homes near Canada Water station change hands often, and renewing tired window mastic between tenants heads off draught and damp complaints.
Questions to ask before you book
- What product goes in the joint
- How the surfaces are prepared before sealing
- When the joint can take water or movement
- How hidden problems are handled
Different surfaces, different methods
Patio & French doors
Patio and French doors have the longest joints on most houses. The threshold and the bottom corners take the most water, so we pay close attention there.
Timber windows & doors
Older timber windows in stone or brick can suit sand mastic rather than modern sealant. We can talk through the options.
How to look after the new joints
To keep the joints looking good and working properly:
- Ventilate rooms so frames do not stay wet inside
- Keep paint off silicone joints
- Keep solvents and bleach off the sealant
- Make sure the drainage slots aren’t blocked
Have a look at the joints once a year, ideally after winter. Cracks and lifting edges are easy to spot early.
A small gap around a frame only grows. As old mastic keeps shrinking, the gap widens, and a cold room gets colder. Resealing closes it.