Greater London · England
North Woolwich Sand Mastic
Sand mastic in North Woolwich from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Draughts and rain around sash boxes
- Patchy fillers round a sash window
- Mastic dropping out of the joint
How we handle sand mastic in North Woolwich
Sand mastic has long been used to fill the joint between timber frames and masonry. It’s a mix of sand and a linseed-oil-based binder, applied by hand. On period homes, it looks right where silicone wouldn’t. If you have mastic that needs renewing before redecorating and wind and rain getting in round a sash window, we can help, whatever the surface.
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, which is when draughts and damp patches appear in homes in North Woolwich.
You’re covered for a year from the day we finish. If anything is not right with it, ring 0345 464 0079 or send us an email.
- Place
- North Woolwich (SE18, E16, E6)
- Region
- Greater London
- Guarantee
- One year on every job
- Quotes
- A clear price before we start
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
What happens if it’s left?
Before painting the windows, it pays to renew the mastic. Paint over cracked mastic will not stop the gaps, and the new mastic is traditionally left unpainted. 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 North Woolwich, the repair is bigger than the sealant job would have been.
Homes and businesses are quoted the same way: the amount of work, how we reach it and what it needs, along with when we can work on site. Call for a quick quote and we’ll explain what it covers.
Why book with us
- Fully insured
- Domestic, commercial and hotel work
- Sanitary silicone with an anti-fungal additive in wet areas
- One-year guarantee on every job
Take a look at what affects the cost and customer reviews.
Towns and villages near North Woolwich
More services for North Woolwich
Can I do it myself?
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
A DIY attempt does not rule out a professional job. We remove it and do the joint properly, so tell us about it when you ask for a quote.
Different surfaces, different methods
Sash and case windows
The mastic round a sash window is on show, so a neat, even finish matters.
Brick reveals
Gaps between frame and brick let in rain and draughts. Renewing the mastic closes it.
North Woolwich homes and the weather
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 it’s worth checking before booking.
Schools such as Oasis Academy Silvertown are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages. North Woolwich is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
North Woolwich is about 1 mile north of Woolwich, in Greater London. For sand mastic in and around North Woolwich, it’s easy to get a quote: please ring 0345 464 0079 or send us an email. We are based in Crawley and cover Greater London. 764 places in Greater London are on our list, from the larger towns to small villages. There’s also a page for London, about 7 miles away.
All of SE18, E16 and E6 is covered for sand mastic. Whether your property is on Drew Road, Tate Road and Pier Road or anywhere close by, we can help. We also cover the places around North Woolwich: Cyprus (1 mile north), Royal Docks (1 mile north-west), Beckton (1 mile north-east), Silvertown (1 mile west) and Custom House (1 mile west). We also work in nearby towns such as 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 (6 miles west).
Landmarks near North Woolwich
In North Woolwich, that means homes and buildings near Beckton District Park, Drew Primary School and The Mitre pub. The nearest railway station is Woolwich Dockyard station, about 0.7 miles south. A little further out are British Hospital for Mothers and Babies (0.8 miles south-west) and Gallions Reach Shopping Park (1.1 miles north-east). The countryside around North Woolwich includes Gilbert's Pit.
Looking after it afterwards
To keep the joints looking good and working properly:
- Check the mastic when you check the paintwork
- Ask the planning authority about consent for listed or conservation-area homes
- Plan mastic work ahead of painting
- Make sure water runs off the sill
Look at the mastic when you look over the windows. Small cracks are easier to deal with early.
Once mastic starts to crumble, rain gets in. It can soak into the frame and the surrounding masonry, so renewing it early is worth it.
How the visit works
We work through the job in order: protect, prepare, seal, tidy. For most jobs that takes a few hours for a single window, longer for several. In North Woolwich, as in most of London, parking needs a little planning. A visitor permit or a nearby bay makes the visit run more smoothly.
- We look at the surrounds with you and agree the joints to renew.
- We remove the old, loose mastic.
- We pack any deep voids first.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
Before we arrive
- Keep children and pets away from the work area
- Let us know about parking restrictions
- Mention if the joints have been sealed before
Getting a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and add pictures by email if you can.
Advice
What we are called out for in North Woolwich
Over the years, sand mastic weathers. It dries out, cracks and loses its grip from the frame or the masonry.
Look out for these signs:
- Silicone on a period window that looks wrong
- Cement or filler used on old window joints that has cracked
- Mastic that needs renewing before redecorating
- Cracked mastic round a front door frame
Letting a property close to Woolwich Dockyard station? Then any sash windows need sound mastic to keep draughts and rain out.
What to look for in a quote
- How the colour is chosen
- What happens if they find a problem under the old sealant
- What insurance they hold
- What product goes in the joint
North Woolwich questions
Is parking an issue for sand mastic in North Woolwich?
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.
Can you do sand mastic in North Woolwich?
Yes. We work across London and the South East, and North Woolwich is part of that. Just ring 0345 464 0079 or drop us an email with a few details of the job.
Can new sealant go over the old?
No. The old sealant always comes out first, so the new joint bonds to clean surfaces.
Do I need to be at home?
If the work is inside, we need someone to let us in. After that, you can carry on with your day.
Can you quote for more than one area?
Yes. Just list everything you need.
Will you leave a mess?
No. The area is protected while we work and cleaned up afterwards.
I’m a tenant. Can you help?
We can work for tenants, landlords or agents. Just make sure your landlord agrees.
Should I try DIY first?
It depends on the job. High-level, external movement and fire-rated joints are professional jobs.
Landlord and commercial work in North Woolwich
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we’ll give you a quote.
Mouldy or split sealant often shows up at the end of a tenancy. Several properties can be quoted together.