Greater London · England
Sand Mastic in Golders Green
Sand mastic across Golders Green and nearby, with every bit of old sealant taken out first and a 12-month guarantee.
- Mastic that needs renewing before redecorating
- Mastic worn away on windows facing the weather
- Crumbling sand mastic round a window
Sand mastic for homes and businesses in Golders Green
Traditional burnt sand mastic that sits naturally against stone and brick. It’s a good fit for period properties, where modern sealant can look out of place. If you are dealing with mastic worn away on windows facing the weather and cement or filler used on old window joints that has cracked, we can put it right, whatever the surface.
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, and access in Golders Green is something to talk through when you book.
The work is covered for a year after we finish. If there’s a problem with it, please phone 0345 464 0079 or send us an email.
- Location
- Golders Green (NW11, NW2, NW3)
- Region
- Greater London
- Guarantee
- A year, on every job
- Quotes
- A clear price before work begins
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
What we’re called out for in Golders Green
Rain on the window surround works into any crack and loosens it further. Windows facing the weather tend to go first.
If you can see any of these, it’s time to have the joints looked at:
- Gaps where the frame meets the masonry
- Wind and rain getting in round a sash window
- Cracked mastic round a front door frame
- A silicone bead on a sash window that spoils the look
Golders Green is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
What your quote should include
- How hidden problems are handled
- What product goes in the joint
- Whether they’re fully insured
- Who turns up on the day
Towns and villages near Golders Green
Also in Golders Green
Golders Green questions
Can parking be tricky for a visit in Golders Green?
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 Golders Green?
Yes. We work across London and the South East, and Golders Green is part of that. You can call 0345 464 0079 or email us and let us know what needs doing, and we will give you a clear price.
Will it make a mess?
We keep the work tidy. Nearby surfaces are protected, and the area is left clean when we finish.
Can old silicone round a sash window be swapped for sand mastic?
Often, yes. Once the silicone is out and the joint prepared, sand mastic is applied by hand.
When will the new mastic be hard?
It takes a while. The skin forms first, and the full set comes later, and we will tell you what to expect.
Do you work for landlords and businesses?
Yes, often. Several properties can go on one quote.
Can you quote for more than one area?
Yes, and it often makes sense. Doing several areas at once is usually more efficient, so mention them when you ask for a quote.
Is there any odour?
Sometimes, a little. Any smell clears as the sealant cures, and ventilation helps.
When it isn’t the sealant
Before you book, it’s worth knowing the limits:
- Timber that has rotted
- Cracked or broken glass
- Whether work needs listed building consent
If you are not sure, just phone 0345 464 0079 or drop us an email and we will give you a straight answer.
Surfaces we seal
- Sash and case windows
- Brick reveals
- Period & listed homes
- Tenement windows
- Timber door frames
- Stone surrounds
Work for landlords, hotels and businesses
Housing providers, facilities teams and property managers book us too. Several sites can go on one quote.
We work for landlords and agents as well as householders. Sealant work between tenants is a simple way to keep a property in good order before the next move-in.
Keeping the joints in good condition
After the cure time, these simple habits help:
- Avoid patching sand mastic with silicone
- Look over the window mastic once a year
- Check with your local planning authority if your home is listed
- Ask a joiner to look at soft timber first
Do not run silicone over the new mastic. If you see a crack, ask us to take a look before trying a quick fix.
Renewing mastic before redecorating saves doing it twice. Painting over failed mastic hides the problem for a while.
How it works
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. For most jobs that takes a few hours per window, depending on the condition of the joints. In Golders Green, as in most of London, parking needs a little planning. 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.
- Old mastic and any loose material are raked out.
- Deep gaps are packed so the mastic sits at the right depth.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
Preparing for the visit
- Clear the area around the work
- Try not to wet indoor joints just before the visit
- Tell us about access, such as stairs, a lift or high-level joints
Ask for a quote
There’s no standard price list, because every job is different. Instead, your job gets its own clear quote. To get started, phone 0345 464 0079 or send us an email.
Advice
How we quote for sand mastic
The quote reflects the job in front of us. We look at:
- Working hours on commercial sites
- Whether old sealant or filler has to be cut out
- Which sealant suits the joint
- Mould in or behind the old joints
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.
What we need to know
Photos by email are helpful but not essential. Try to tell us:
- Photos by email, if that’s easy
- Where the property is
- What the problem is, such as mould, gaps, leaks or cracking
- Any previous sealing or DIY work
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we’ll explain how we’d tackle it. When it suits you, ring 0345 464 0079 or send us an email.
Sand mastic in Golders Green: local notes
The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Historic houses like Heath House (about 1.1 miles south-east) are a reminder that the area around Golders Green 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.
If you live in an older home near Church of St Alban the Martyr, the joint between an old wall and a newer frame is normally the first place rain gets in. If you let a flat or house near Cricklewood station, cracked sand mastic around sash windows lets in the draughts tenants complain about.
Golders Green is about 1 mile north of West Hampstead, in Greater London. Wherever you are in the NW11 postcode area, our applicators can take on sand mastic. Across Greater London, we cover 764 places, and Golders Green is one of them. For nearby work, see our London page (7 miles or so).
Work in NW11, NW2 and NW3 is quoted and booked the same way as anywhere else. Sand mastic is available to properties on Nant Road, Hoop Lane and Park Avenue and the roads around them. If you are just outside Golders Green, we cover Temple Fortune (1 mile north), Childs Hill (1 mile south), North End (1 mile south-east), Hampstead Garden Suburb (1 mile north-east) and Vale of Health (1 mile south-east). We also work in nearby towns such as London (7 miles south-east), City of Westminster (5 miles south-east), Marylebone (4 miles south-east), Kensington (5 miles south), St Pancras (5 miles south-east) and Shoreditch (6 miles south-east).
Around Golders Green
Around Golders Green, our work takes us to homes and buildings near Childs Hill Park, The King Alfred School and The Old Bull and Bush pub. The closest station to Golders Green is Cricklewood station, roughly 1.2 miles south-west. A little further out are Kenwood House (1.3 miles east) and Brent Cross Shopping Centre (1.1 miles west). For a walk, there’s Parliament Hill and Darland's Lake.
DIY sealant or a professional job?
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.