Greater London · England
Window Mastic in Woolwich
Window mastic for Woolwich, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Hard, cracked sealant around windows
- Damp patches on the reveal after heavy rain
- Old mastic that has gone black or come away
Window mastic for homes and businesses in Woolwich
From a single sill to a whole house of windows, you’ll get a clear quote before work begins. Just call 0345 464 0079 or send us an email and tell us how many frames there are and how they’re reached for window mastic in Woolwich. If you are dealing with black, perished sealant on frames and rain getting in at the frame or under the sill, we can put it right.
Many London homes are flats, with windows high above the street. Who looks after the outside of the frames can depend on the lease, so check that first.
Whatever the size of the job, it’s backed by our 12-month guarantee.
- Location
- Woolwich (SE18, E16, SE7)
- Region
- Greater London
- Guarantee
- A year, on every job
- Quotes
- A clear price before we start
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Can I do it myself?
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
If you are set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it doesn’t work out, we can still put it right.
For landlords and businesses
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
Do you need window mastic in Woolwich?
Sun, frost and rain wear sealant out. UV light hardens the outside of the bead, until it loses its stretch and starts to crack.
If you can see any of these, it’s time to have the joints looked at:
- Mastic that’s falling out in pieces
- Hard, cracked sealant around windows
- Damp patches on the reveal after heavy rain
- Gaps between the frame and the inside reveal
Rented homes near Woolwich Dockyard station change hands often, and renewing tired window mastic between tenants heads off draught and damp complaints.
Before booking anyone
- Are they insured?
- What the quote includes, VAT included or not
- How much experience the applicator has
- How the joint is cleaned and prepared
Aftercare tips
Joint life depends on how it’s used and looked after. We suggest:
- Ventilate rooms so frames do not stay wet inside
- Don’t aim a pressure washer at the joints
- Clean frames with a soft cloth and soapy water
- Keep timber frames painted
Check the drainage slots in the frames aren’t blocked, so water can run away instead of sitting against the joint.
Signs to watch for: split or missing mastic, gaps, damp patches inside or black mould on the reveal. Any of these is worth a call.
Honest limits
We’d rather tell you now than do work that won’t last, so here’s what sealant can’t put right:
- Faulty window hardware
- Draughts through the window seals rather than the frame
- Penetrating damp from a failed cavity tray or render
If you are not sure, just call 0345 464 0079 or drop us an email and we’ll give you a straight answer.
Joints and surfaces we work on
- Timber windows & doors
- Aluminium frames
- Composite doors
- Patio & French doors
- uPVC windows
- Window sills
Frames and glazing around Woolwich
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. In London conversions and blocks, the lease decides who is responsible for the frames, so check that before booking.
Woolwich is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book. For site and facilities teams at buildings such as Mulgrave Primary School, the mastic around its windows and doors needs looking after like any other building’s.
Woolwich is about 6 miles south-east of Leyton, in Greater London. Woolwich gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Woolwich is one of 764 places in Greater London we cover. There’s also a page for London, roughly 7 miles from Woolwich.
Work in SE18, E16 and SE7 is quoted and booked the same way as anywhere else. Local streets include Market Street, Woolwich High Street and Beresford Square Market Place. If you’re just outside Woolwich, we cover Plumstead (1 mile east), Charlton (1 mile west), New Charlton (1 mile west), Shooter's Hill (1 mile south) and Kidbrooke (2 miles south-west). Larger places within reach include London (7 miles west), City of Westminster (9 miles west), Marylebone (9 miles west), Kensington (11 miles west), St Pancras (8 miles west) and Shoreditch (7 miles north-west).
What’s near Woolwich
In Woolwich, that means homes and buildings near Woolwich Common, Oasis Academy Silvertown and Oasis Academy Silvertown and the streets around them. Woolwich has its own railway station: Woolwich Dockyard station. Nearby you’ll also find Royal Artillery Museum (0.5 miles north-east) and British Hospital for Mothers and Babies (0.5 miles west). Not far away are Gilbert's Pit.
What we do, step by step
Every visit runs the same way: we look at the joints together, mask and protect the surrounding surfaces, do the work and tidy away. Most jobs take anything from an hour or two to a full day, depending on how many frames there are. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. If the building has a concierge, managing agent or access rules, tell us when you book.
- First, we go round the frames with you and agree the list.
- We remove the old mastic and clean the frame edge and wall.
- Where the gap is deep, backing rod goes in first.
- 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.
How to prepare
- Tell us about access, such as stairs, a lift or high-level joints
- Where the joints are inside, avoid wetting them before we arrive
- Let us know about earlier repairs to the joints
Get a quote
Getting a quote is simple: let us know what needs doing and where, and roughly how big it is. A few photos by email make the job easier to understand, and we’ll take it from there.
Related advice
FAQs for Woolwich
Is parking a problem for a job in Woolwich?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. The visit is then planned around what’s available.
Do you cover Woolwich for window mastic?
Yes, Woolwich is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or drop us an email and let us know what needs doing.
How many windows can you do in a day?
A few frames take a few hours. We confirm the timing with your quote.
Do you seal inside as well as outside?
Yes. The outside joint keeps the weather out, and the inside joint stops draughts and finishes the reveal. We can do either or both.
What should I tell you?
Only a few details: the address or postcode, what’s wrong and any access issues. Then ring 0345 464 0079 or send us an email.
Will the old sealant be removed?
Yes. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
Is it worth trying it myself?
It depends on the job. High-level, external movement and fire-rated joints are professional jobs.
Can you work on commercial sites?
Yes. Commercial and hotel work is a large part of what we do, as well as homes. Working times can be discussed when we quote.
Nearby places to Woolwich
What else we do in Woolwich
Quotes for window mastic in Woolwich
Jobs vary more than people expect. What affects the quote:
- The old material and how stubborn it is
- The number of rooms or windows
- How easy the joints are to reach
- How much there is to do
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, any mould to treat, and whether the work is at height. Your quote takes all of that into account.
Asking for a quote
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- Roughly how big the job is
- Pictures of the joints, sent by email
- The type of property
- Any access issues, like height or stairs
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints.