Greater London · England
Sand mastic for sash & case windows in Temple Bar, Greater London
Problem with your window and door surrounds in Temple Bar? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Patchy fillers round a sash window
- Gaps between timber frames and stone or brick
- Wind and rain getting in round a sash window
Sand mastic in Temple Bar, done properly
Sand mastic is the traditional way to point the gap between a timber window frame and the stone or brick around it. It’s made from sand and a linseed-oil-based binder, applied by hand. On period homes, it looks right where silicone wouldn’t. If you have wind and rain getting in round a sash window and mastic round period door frames that has failed, we can put it right, whatever the surface.
London’s Victorian and Edwardian terraces were built with timber sash windows, and many still have them or their replacements. Either way, the mastic between frame and brickwork is what stops draughts and rain getting in.
We stand behind the work with a one-year guarantee, so you are not left on your own once the job is done.
- Where
- Temple Bar (WC2B, WC2E, EC1N)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Aftercare tips
Looking after new joints is easy:
- Leave the new mastic unpainted
- Keep modern sealant off the mastic
- Take care around the mastic when scraping paint
- Renew mastic before redecorating the windows
Leave the new mastic unpainted, which is the traditional advice. Ask us before any decorating around it.
Fine cracks show the mastic is starting to fail. It’s easier to renew it before it drops out.
Temple Bar homes and the weather
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. In London conversions and blocks, the lease decides who is responsible for the frames, so it’s worth checking before booking.
If you look after a building such as St Clement Danes CofE Primary School, its window and door frames need their mastic kept sound, just like a home’s. Temple Bar is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book. If you live in an older home near Temple Church, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Temple Bar is about 1 mile south of St Pancras, in Greater London. For sand mastic in and around Temple Bar, it’s easy to get a quote: please ring 0345 464 0079 or drop us an email. We cover Greater London from our Crawley base, Temple Bar included. Our Greater London coverage runs to 764 places, Temple Bar among them.
Every address in WC2B, WC2E and EC1N is covered for sand mastic, from the main roads to the quietest streets. Whether your property is on Shoe Lane, Drury Lane and New Square or anywhere close by, our applicators can take on the job. Main roads around Temple Bar include the A4 and A40, so getting to you is simple. We also cover the places around Temple Bar: Temple (1 mile south), Clare Market (1 mile west), Aldwych (1 mile west), Blackfriars (1 mile east) and Covent Garden (1 mile west). Within a short drive, we also cover Kensington (4 miles west), Walthamstow (6 miles north-east), Hampstead (4 miles north-west), Ruislip (13 miles west), Brompton (3 miles south-west) and Stockwell (3 miles south).
Local landmarks in Temple Bar
We work in homes and buildings around British Library of Political and Economic Science, Mercers' School and London Nautical School, among other places. Also close by are Lincoln's Inn Fields (under half a mile north-west) and Queen's Head Tavern (within half a mile north-east). There’s a railway station in Temple Bar itself: City Thameslink station. Well-known places in the area include Montfichet's Tower (0.5 miles east) and Twinings Museum (within half a mile south-west). The countryside around Temple Bar includes Ludgate Hill and Barnsbury Wood.
What we cannot put right
It helps to know what we cannot do:
- Damaged stone surrounds
- Decayed frames that need repair
- Broken panes
If you are not sure, just ring 0345 464 0079 or email us and we will give you a straight answer.
What we seal
- Brick reveals
- Stone surrounds
- Period & listed homes
- Timber door frames
- Tenement windows
- Sash and case windows
Also near Temple Bar
Other services in Temple Bar
Why act early in Temple Bar
Not every draught comes from the sashes themselves. Open mastic joints round the box can let air in and new mastic seals them. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and once it shows in Temple Bar, the repair is bigger than a sealant job.
Every job is a little different, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all make a difference, and we will explain the quote if you ask.
What you get with us
- Experience in homes, commercial sites and hotels
- Rated 4.9 stars on Google
- Neat joints and a tidy finish
- Full insurance on every job
Take a look at how sealant jobs are priced and customer reviews.
How the visit works
On the day, there’s very little for you to do. Show us the job and we’ll take it from there. The work itself takes a few hours per window, depending on the condition of the joints from start to finish. In a London area like Temple Bar, 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.
- 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.
- We dress the finish so it sits neatly against the masonry.
Before we arrive
- For business premises, tell us about site rules or sign-in
- Mention any leaks or damp you’ve noticed
- For indoor joints, keep the area dry beforehand if you can
Getting a quote
For a quote, ring 0345 464 0079 or email us and tell us where the job is and what the problem looks like. We’ll give you a clear quote before any work starts.
Read more
For landlords and businesses
We work for landlords and letting agents as well as homeowners. Resealing between tenancies keeps a property looking cared for before the next move-in.
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance.
Questions from Temple Bar
Can you help a landlord with a rental near City Thameslink station?
Yes, landlords and agents are among the people we work for. You can phone 0345 464 0079 or send us an email with the details for a clear quote.
Do you cover Temple Bar for sand mastic?
Yes. Our work covers London and the South East, and Temple Bar is part of that. You can phone 0345 464 0079 or email us and tell us what needs doing.
What exactly is sand mastic?
Sand mastic is a traditional material for pointing round windows and doors. It’s made with sand and a linseed-oil-based binder.
Do I have to be there?
For indoor joints, yes, someone needs to let us in. After that, you can carry on with your day.
What does sand mastic cost?
There’s no set price, as it depends on the job: how much there is, what’s there now, how we reach it and what it needs. We agree the price before any work begins.
Can sand mastic be painted?
The usual advice is to leave sand mastic unpainted. If you are redecorating the window, ask us first and we will advise.
Can you replace silicone on a period window with sand mastic?
Often, yes. With the silicone removed and the joint cleaned we point it with sand mastic.
Is there any odour?
That depends on the sealant. Some smell for a while, some hardly at all, and any smell fades as they cure.
What affects the cost of sand mastic
You’ll get a clear quote before work begins. It takes into account:
- How many areas need sealing
- The old material and how stubborn it is
- Working hours on commercial sites
- The product the joint needs
A few things move the cost up or down: the old material and how easily it comes out, whether mould needs treating, and whether we need extra access for height. Your quote takes all of that into account.
Helping us quote
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- A few pictures by email, if you can
- What the problem is, such as mould, gaps, leaks or cracking
- Where the job is, and your postcode
- Access, such as stairs, a lift or height
We quote each job on its own, so start by telling us what you need. Simply phone 0345 464 0079 or email us and describe the job.
How the job changes by surface
Tenement and terrace windows
Windows above ground floor need the right access. Tell us the height and we will confirm what’s needed.
Brick reveals
We rake out the old mastic and pack deep voids before the new mastic goes in.