Greater London · England
Sand mastic for sash & case windows in Little Venice, Greater London
Sand mastic for Little Venice and the surrounding area: careful preparation, the right product and tidy work. Call for a quick quote.
- Wind and rain getting in round a sash window
- Mastic worn away on windows facing the weather
- Mastic round period door frames that has failed
How we handle sand mastic in Little Venice
For a listed home or one in a conservation area, ask your local planning authority whether consent is needed for work to windows. Like-for-like sand mastic is often the preferred finish. We are often asked to deal with failed mastic on an exposed elevation and gaps round a timber door in stone or brick, across tenement windows, sash and case windows and brick reveals.
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.
Every job comes with a one-year guarantee, wherever you are in Greater London.
- Where
- Little Venice (W2, W9, NW8)
- Region
- Greater London
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Keeping the joints in good condition
Looking after new joints is easy:
- Go gently near the mastic when preparing windows
- Sort the mastic before the decorators arrive
- Check the mastic when you check the paintwork
- Have rotten timber repaired before new mastic goes in
Leave the new mastic unpainted, which is the traditional advice. If you are redecorating, ask us first.
Sound mastic protects the frame. Failed mastic lets water reach the timber and timber that stays wet can rot.
When to call us in Little Venice
Timber frames move with the seasons. The movement cracks the mastic little by little.
Signs it’s time to call us include:
- Gaps where the frame meets the masonry
- Draughty sash windows at the surround
- Mastic round period door frames that has failed
- Modern sealant on a period surround
For site and facilities teams at buildings such as Ark Paddington Green Primary Academy, the mastic around its windows and doors needs looking after like any other building’s.
Comparing quotes
- How the joint is cleaned and prepared
- Are they insured?
- Whether you can choose the colour
- Who turns up on the day
How we quote for sand mastic
You’ll get a clear quote before we start. It takes into account:
- The size of the job
- Whether old sealant or filler has to be cut out
- Working hours on commercial sites
- Mould in or behind the old joints
The cost depends on how much there is to do, how much old material has to come out and how easy the joints are to reach. We give a clear quote before any work starts.
Helping us quote
There’s no need for technical detail. It helps if you can tell us:
- Where the property is
- Roughly how big the job is
- What’s wrong with the joints now
- A few photos by email, if you can
Call for a quick quote, or send an email if you’d rather. Tell us about the joints that need doing and we’ll talk you through the work and give you a clear quote.
How the visit works
You do not need to clear the whole room or building before we come, just the space around the work. Everything nearby is protected, and the job takes a few hours for a single window, longer for several for a typical job. In Little Venice, as in most of London, parking needs a little planning. A visitor permit or a nearby bay makes the visit run more smoothly.
- We start by checking each surround and agreeing the joints to renew.
- We rake out the old mastic and clean the joint.
- Large voids are packed out first, so the mastic is not too thick.
- We mix the sand mastic and apply it by hand, shaping it to the joint.
- The mastic is finished to sit tidily against the stone or brick.
Preparing for the visit
- Mention any parking rules near the property
- Mention any leaks or damp you’ve noticed
- Mention any sign-in or site rules at work premises
Ask for a quote
We do not publish a price list, because every job is different. Instead, your job gets its own clear quote. To get started, ring 0345 464 0079 or drop us an email.
Advice
Towns and villages near Little Venice
Other services in Little Venice
Surface by surface
Sash and case windows
The mastic round a sash window is on show, so a neat, even finish matters.
Stone surrounds
We take care not to mark the stone while raking out the old mastic.
Frames and glazing around Little Venice
In London conversions and blocks, the lease decides who is responsible for the frames, so check that before booking. With historic houses such as Winfield House (about 1 mile north-east) nearby, there’s older building stock in the area around Little Venice as well as newer homes. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
For landlords with property near London Paddington station, cracked sand mastic around sash windows lets in the draughts tenants complain about. Little Venice is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
Little Venice is about 1 mile west of City of Westminster, in Greater London. Homes, rented property, offices and hotels in Little Venice can book us for sand mastic. Every job comes with our 12-month guarantee. Little Venice is one of 764 towns and villages in Greater London we cover for sand mastic.
All of W2, W9 and NW8 is within our area for sand mastic, from the main roads to the quietest streets. Local streets include Harrow Road, Alfred Road and Newton Road, and we cover them all. With the A5 and A40 close by, Little Venice is easy for our applicators to reach. If you’re just outside Little Venice, we cover Westbourne Green (1 mile west), Paddington Green (1 mile east), Paddington (1 mile south-east), Maida Vale (1 mile north-west) and Lisson Grove (1 mile north-east). We also work in nearby towns such as London (4 miles east), St Pancras (3 miles east), Shoreditch (5 miles east), Walthamstow (8 miles north-east), Hoxton (4 miles east) and Whitechapel (5 miles east).
What’s near Little Venice
Typical jobs here are in homes near International Community School, The Bridge House and Westminster Academy, among other places. Also close by are Kensington Gardens (1 mile south) and Royal Society of Medicine Library (1.6 miles east). There’s a railway station in Little Venice itself: London Paddington station. Nearby you’ll also find Maida Vale Hospital for Nervous Diseases (under half a mile north) and Kensington Arcade (1.5 miles south). Open spaces near Little Venice include Greville Place nature reserve and Campden Hill.
DIY sealant or a professional job?
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.
Work for landlords, hotels and businesses
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. Several properties can be quoted together.
Common questions in Little Venice
Is parking a problem for a job in Little Venice?
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.
Do you work for landlords with property near London Paddington station?
Yes, landlords and agents are among the people we work for. Just phone 0345 464 0079 or drop us an email with the address and what needs doing, and we’ll give you a clear price.
Where are you based?
Mr Mastic is based in Crawley. We cover Little Venice and the rest of Greater London.
What should I tell you?
Let us know what needs doing and where, with pictures by email if possible. If we need more, we’ll ask.
Do you do commercial work?
Yes. Commercial and hotel work is a large part of what we do. We can talk about working times when we quote.
How long does the job take?
Typically it takes anything from a few hours to a full day, depending on how many windows. Bigger jobs take longer, and we will say how long yours will take.
Should I use sand mastic or silicone?
Sand mastic usually suits period timber windows best. On modern frames, we’d normally use a flexible sealant, and we will explain why.
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.