Greater London · England
Sand mastic for sash & case windows in Maze Hill, Greater London
We cover Maze Hill for traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old sealant removed completely, joints prepared properly and a 12-month guarantee.
- Old sand mastic that has cracked, crumbled or fallen out
- Modern sealant on a period surround
- Draughty sash windows at the surround
Why act early in Maze Hill
Not every filler suits an old window surround. Sand mastic is the like-for-like choice and that can be important for listed homes. Converted houses in London often have a bathroom above someone else’s living room, so a small leak from tired sealant can mean a neighbour’s ceiling and a lot of disruption. Dealing with it early is far simpler for homes in Maze Hill.
No two jobs are quite the same, so each one gets its own quote. Size, access and the product the joint needs all make a difference, and we will explain the quote if you ask.
Why us?
- We leave the area clean and tidy
- Experience in homes, commercial sites and hotels
- Old sealant always removed completely
- ARBOMaster approved applicator
Take a look at our cost guide or our reviews.
Sand mastic for homes and businesses in Maze Hill
A silicone bead around a sash window can look out of place and is not always the right material. Sand mastic gives a finish that matches the age of the house and we can swap the silicone for it. If you have gaps between timber frames and stone or brick and cement or filler used on old window joints that has cracked, we can help, whatever the surface.
Much of London’s older housing was built with timber sash windows, some still in place and some long since replaced. Whatever is in the opening now, the joint between frame and wall is what keeps the weather out, in Maze Hill as anywhere.
Whatever the size of the job, it’s backed by our one-year guarantee.
- Place
- Maze Hill (SE10, SE3, E14)
- Wider area
- Greater London
- Cover
- A year, on every job
- Quote
- A clear price before work begins
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
How it works
There’s no need to move everything out before we come, just the space around the work. We protect the rest, and the work takes a few hours for a single window, longer for several for a typical job. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Maze Hill. It helps if you can point us to a visitor permit or a bay close to the door.
- We look at the surrounds with you and agree the joints to renew.
- We remove the old, loose mastic.
- Deep gaps are packed so the mastic sits at the right depth.
- The sand mastic is mixed and pressed into the joint by hand.
- The surface is finished to suit the stone or brick.
Before we arrive
- Where the joints are inside, avoid wetting them before we arrive
- Tell us about access, such as stairs, a lift or high-level joints
- Move anything stored near the joints
Get a quote
Asking for a quote is easy: let us know what needs doing and where and its rough size. Photos by email help us understand the job, and we’ll take it from there.
Read more
What we’re called out for in Maze Hill
Most of it is simply age. Sand mastic is a maintenance item like any pointing, depending on exposure and upkeep.
People normally contact us when they notice one of these:
- Wind and rain getting in round a sash window
- Tired mastic found when preparing windows for paint
- Weathered mastic on the most exposed windows
- Gaps where the frame meets the masonry
For landlords with property near Maze Hill station, older sash windows in a rental need their mastic kept sound to keep the weather out.
Before you book anyone
- How long the guarantee is
- What the quote includes, VAT included or not
- Whether all the old sealant comes out first
- How the joint is cleaned and prepared
What affects the quote in Maze Hill
Every job gets its own quote. These are the things that affect it:
- Any mould that needs treating
- The type of sealant required
- The size of the job
- Whether the work is at height
A few things move the cost up or down: how much old sealant there is and how stubborn it is, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
What we need to know
There’s no need for technical detail. Just tell us:
- How many joints, rooms or windows are involved
- A few pictures by email, if you can
- Whether it’s a home or a business
- How we’d reach the joints
Need a quote? Please phone 0345 464 0079 or send us an email with a few details. We will explain what we’d do and send you a clear quote before any work starts.
Nearby places to Maze Hill
More services for Maze Hill
Your questions about sand mastic in Maze Hill
Can parking be tricky for a visit in Maze Hill?
In much of London, parking needs planning: a visitor permit or a nearby bay makes the day run more smoothly, so mention what’s available when you book.
Do you work for landlords with property near Maze Hill station?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. You can call 0345 464 0079 or drop us an email with the details for a clear quote.
What guarantee comes with the work?
Our 12-month guarantee applies to all our work.
Do I have to be there?
It depends on the job. Inside work needs someone to give us access.
Is it worth trying it myself?
Sometimes. Preparation is everything: all the old sealant out, and a clean, dry joint. If it doesn’t work out, we can redo it.
How long does sand mastic take to harden?
A skin forms quite soon, but full hardening takes longer. We will explain what to expect before we leave.
Do the sealants smell?
That depends on the sealant. Some products have a noticeable smell, others very little.
Should I use sand mastic or silicone?
That depends on your windows. Period windows in stone or brick usually suit sand mastic, while modern frames normally get a flexible sealant.
Keeping the joints in good condition
Aftercare is simple:
- Inspect the joints round the windows every year or so
- Check with your local planning authority if your home is listed
- Renew mastic before redecorating the windows
- Do not run silicone over sand mastic
Don’t touch or press the mastic while it hardens. It skins over quickly but needs longer to fully harden.
An open joint round the box lets weather through. The longer it’s left, the more the joint opens.
What sand mastic looks like in Maze Hill
In a converted house or block, who looks after the windows depends on the lease, so check that before booking. Historic houses like Queen's House (about 0.3 miles west) are a reminder that the area around Maze Hill has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
Schools such as John Roan School are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages. In the older streets around Christ Church, the joint between an old wall and a newer frame is normally the first place rain gets in.
Maze Hill is about 1 mile north-east of Greenwich, in Greater London. Wherever you are in the SE10 postcode area, our applicators can take on sand mastic. Maze Hill is one of 764 places in Greater London where we work.
Postcode districts we cover here for sand mastic: SE10, SE3 and E14. Streets in the area include Webb Road, The Avenue and Hardy Road, and we cover them all. Neighbouring places we cover for sand mastic include Greenwich (1 mile south-west), Vanbrugh Park Estate (1 mile south-east), Westcombe Park (1 mile east), Blackheath (1 mile south) and Isle of Dogs (1 mile north-west). Further out, we also cover London (4 miles west), City of Westminster (7 miles west), Marylebone (7 miles west), Kensington (9 miles west), St Pancras (6 miles north-west) and Shoreditch (5 miles north-west).
Around Maze Hill
Typical jobs here are in homes near Wildwood Montessori School, East Greenwich Pleasaunce and Meridian Primary School and the streets around them. Maze Hill has its own railway station: Maze Hill station. Well-known places in the area include Lewisham Shopping Centre (1.5 miles south-west) and Greenwich District Hospital (under half a mile north-east). For a walk, there’s Tower Hill and Creekside Discovery Centre.
How the job changes by surface
Stone surrounds
The stone is treated with care when the old mastic comes out.
Tenement and terrace windows
Windows above ground floor need the right access. Let us know the floor and we will confirm access.
DIY versus a professional finish
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.