Greater London · England
Fitzrovia Sand Mastic
Sand mastic for Fitzrovia and the surrounding area: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Draughts and rain around sash boxes
- Weathered mastic on the most exposed windows
- Silicone on a period window that looks wrong
Common questions in Fitzrovia
Is Fitzrovia in your area for sand mastic?
Yes. Our work covers London and the South East, and Fitzrovia is part of that. Just call 0345 464 0079 or drop us an email with a few details of the job, and we will give you a clear quote.
Do you work for landlords with property near London Euston station?
Yes, landlords and agents are among the people we work for. You can call 0345 464 0079 or send us an email with the details for a clear quote.
What is sand mastic?
It’s a mix of sand and a linseed-oil-based binder. It’s built up in the joint by hand and finished to sit neatly against the masonry.
Will you leave a mess?
No. We protect the surfaces around the joints, and we clear up the old sealant and our materials before we leave.
How long does sand mastic take?
That depends on how much there is to do, but most jobs take a few hours per window, depending on the condition of the joints. We’ll tell you when we quote.
Do you have insurance?
Yes. Full insurance covers our work, and we can confirm the details when we quote.
How much does sand mastic cost in Fitzrovia?
Every job is different, so each one gets its own quote. To get one, call 0345 464 0079 or send us an email and tell us what needs doing and where.
What information do you need?
Just the basics: the address or postcode, what’s wrong and any access issues. After that, simply call 0345 464 0079 or drop us an email.
About our sand mastic in Fitzrovia
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 are dealing with mastic round period door frames that has failed and wind and rain getting in round a sash window, we can put it right.
Much of London’s older housing was built with timber sash windows, some still in place and some long since replaced. Either way, the mastic between frame and brickwork is what stops draughts and rain getting in, in Fitzrovia as anywhere.
We guarantee the work for a year. If something isn’t right with it in that time, tell us and we will put it right.
- Place
- Fitzrovia (NW1W, W1T, W1G)
- Region
- Greater London
- Cover
- 12 months on all our work
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Aftercare tips
After the cure time, these simple habits help:
- Go gently near the mastic when preparing windows
- Renew mastic before redecorating the windows
- Clear gutters so water doesn’t pour onto the windows
- Don’t 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 as more mastic falls out.
Do you need sand mastic in Fitzrovia?
Shallow joints are a common cause. A thin layer doesn’t hold well, which is why we pack deep voids first and get the depth right.
Common reasons people contact us are:
- Gaps round a timber door in stone or brick
- Weathered mastic on the most exposed windows
- Cement or filler used on old window joints that has cracked
- A silicone bead on a sash window that spoils the look
If you look after a building such as All Souls CofE Primary School, the mastic around its windows and doors needs looking after like any other building’s.
Before you book anyone
- Whether all the old sealant comes out first
- How the colour is chosen
- What preparation is included
- What the cure time is
When something else is needed
We won’t take on work that won’t last, so here’s what sealant cannot put right:
- Damaged stone surrounds
- Planning or listed building consent (your local planning authority decides)
- Sash cords, weights and draught-proofing of the sashes
If you are not sure, just ring 0345 464 0079 or email us and we’ll give you a straight answer.
Where we work in Fitzrovia
- Sash and case windows
- Period & listed homes
- Tenement windows
- Brick reveals
- Timber door frames
- Stone surrounds
Towns and villages near Fitzrovia
Also in Fitzrovia
What affects the quote in Fitzrovia
Jobs vary more than people expect. What affects the quote:
- Which sealant suits the joint
- The size of the job
- How easy the joints are to reach
- When we can work, for business premises
What it costs depends on how much there is to do, how much old material has to come out and access to the work. We give a clear quote before work begins, so you know where you stand.
Asking for a quote
Before you ask for a quote, have a think about:
- A few pictures by email, if you can
- The type of property
- How many joints, rooms or windows are involved
- Access, such as stairs, a lift or height
Asking for a quote is easy: tell us what needs doing and where. Photos by email help us understand the job, and we’ll take it from there.
For landlords and businesses
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
If you manage several properties in or around Fitzrovia, several properties can go on one quote. Just tell us the addresses and what each one needs.
What happens on the day
There isn’t much for you to do on the day. Point us to the joints and we will get on with it. The work itself takes anything from a few hours to a full day, depending on how many windows from start to finish. In a London area like Fitzrovia, the main things to plan are parking and access: let us know about parking, the floor we’ll be working on and any lift or shared entrance.
- We check each window surround and the condition of the joint.
- The joint is raked out and cleaned.
- Large voids are packed out.
- New sand mastic is applied and shaped by hand.
- We finish the mastic to a tidy line.
Preparing for the visit
- Mention if the joints have been sealed before
- Clear the area around the work
- Tell us about any water getting in
How to get a quote
Call for a quick quote, or email us if that’s easier. Describe what needs sealing and we will explain what’s involved and give you a clear price.
Read more
Sand mastic in Fitzrovia: local notes
With historic houses such as Handel Hendrix House (about 0.8 miles south-west) nearby, there’s older building stock in the area around Fitzrovia as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic. In a converted house or block, who looks after the windows depends on the lease, so check that before booking.
If you live in an older home near Whitefield's Tabernacle, frames set in older brick or stone need a sealant that suits the wall as well as the frame. As a London address, Fitzrovia can be tricky for parking: let us know about parking bays, permits or a driveway.
Fitzrovia is about 1 mile north-east of Marylebone, in Greater London. From the centre of Fitzrovia to the outskirts, sand mastic is available for homes and businesses alike. Our Greater London coverage runs to 764 places, Fitzrovia among them.
We cover every part of the NW1W, W1T and W1G postcode area for sand mastic and the streets around it. Whether your property is on Euston Road, Duke's Road and Market Place or a nearby road, we can help. Being close to the A501 and A4200, Fitzrovia is simple for us to get to. Nearby, we also carry out sand mastic in Euston (1 mile north-east), Marylebone (1 mile south-west), Bloomsbury (1 mile east), Somers Town (1 mile north-east) and Soho (1 mile south-east). Larger places within reach include Kensington (3 miles south-west), Shoreditch (3 miles east), Walthamstow (7 miles north-east), Whitechapel (3 miles east), Hampstead (3 miles north-west) and Ruislip (12 miles west).
Local landmarks in Fitzrovia
Typical jobs here are in homes near Carpenters Arms, UCL School of Slavonic and East European Studies and St Anne's Churchyard and the streets around them. Other local landmarks include Wellcome Library (under half a mile north-east) and Maria Fidelis Catholic School FCJ (under half a mile north). There’s a railway station in Fitzrovia itself: London Euston station. Other landmarks nearby include London Foot Hospital (under half a mile south-west) and Blindiana Museum (within half a mile west). Not far away are St. James's Park Lake and Primrose Hill.
Surface by surface
Timber door frames
Round a period front door, sand mastic gives the right look.
Tenement and terrace windows
Upper-floor windows need access planning. Tell us the height and we will confirm what’s needed.