Greater London · England
Sand Mastic in Fortune Green
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in Fortune Green, with a 12-month guarantee on every job. Call for a quick quote.
- Crumbling sand mastic round a window
- Mastic round period door frames that has failed
- Tired mastic found when preparing windows for paint
About our sand mastic in Fortune Green
Sand mastic suits most period window surrounds. Newer frames usually get a flexible sealant instead, and we will talk through which suits your home. Common call-outs are for failed mastic on an exposed elevation and gaps round a timber door in stone or brick, on stone surrounds, brick reveals and timber door frames.
London has a lot of flats and conversions, where windows are often on upper floors. Who looks after the outside of the frames can depend on the lease, so check that first, and access in Fortune Green is something to talk through when you book.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we will sort it.
- Place
- Fortune Green (NW3, NW6, NW2)
- Wider area
- Greater London
- Guarantee
- One year on every job
- Price
- A clear price before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
What sand mastic looks like in Fortune Green
Historic houses like Fenton House (about 0.7 miles east) are a reminder that the area around Fortune Green has older buildings as well as new. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic. Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you live in an older home near Church of St Luke, the joint between an old wall and a newer frame is generally the first place rain gets in. Fortune Green is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
Fortune Green is about 1 mile west of Hampstead, in Greater London. Whether you are in the middle of Fortune Green or further out, we cover sand mastic for every kind of property, from flats and houses to offices and hotels. Across Greater London, we cover 764 places, and Fortune Green is one of them. For nearby work, see our London page (6 miles or so).
Every address in NW3, NW6 and NW2 is within our area for sand mastic, from the main roads to the quietest streets. That includes homes and businesses on Mill Lane, Ajax Road and Sarre Road and the roads around them. Close by, we work in West Hampstead (1 mile east), Childs Hill (1 mile north), Hampstead (1 mile east), Greenhill (1 mile east) and Vale of Health (1 mile north-east). We also work in nearby towns such as London (6 miles south-east), City of Westminster (3 miles south-east), Marylebone (3 miles south-east), Kensington (4 miles south), St Pancras (4 miles south-east) and Shoreditch (5 miles east).
Around Fortune Green
We work in homes and buildings around Holly Bush pub, St Vedasts School For Boys and Kilburn Grange Park and the streets around them. For rail, the closest station is West Hampstead Thameslink station, roughly 0.5 miles south. Nearby you will also find Montfichet's Tower (4.9 miles south-east) and O2 Centre (0.8 miles south-east). Green spaces nearby include The Long Water and Westbere Copse.
DIY versus a professional finish
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
Fortune Green: your questions answered
Can parking be tricky for a visit in Fortune Green?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. That way the visit can be planned around it.
Can you do sand mastic in Fortune Green?
Yes, Fortune Green is within the area we cover. Our work covers London and the South East. Just phone 0345 464 0079 or email us with a few details of the job.
Will the old sealant be removed?
Yes, every time. New sealant won’t bond properly to old, so the joint is cleaned back first.
What do you put in the joint?
We choose the sealant for the joint, not the other way round. Where it moves, gets wet or faces the weather makes a difference.
What does sand mastic cost?
We don’t publish prices, because the cost 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 you quote for more than one area?
Yes. Tell us about everything you’d like done and you’ll get one quote.
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.
Should I check with the council before work on a listed or conservation-area home?
Speak to your local planning authority before work starts. Sand mastic is often favoured as like for like but the decision is theirs.
What the job involves on each surface
Tenement and terrace windows
Upper-floor windows need access planning. Tell us the height and we’ll confirm what’s needed.
Brick reveals
An open joint at a brick reveal lets weather in. Renewing the mastic closes it.
Aftercare tips
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Inspect the joints round the windows every year or so
- Check with your local planning authority if your home is listed
- Don’t paint over the new mastic
- Avoid patching sand mastic with silicone
Look at the mastic when you look over the windows. Small cracks are easier to deal with early.
Renewing mastic before redecorating saves doing it twice. Painting over failed mastic hides the problem for a while.
Nearby places to Fortune Green
Other services in Fortune Green
Leave it or put it right?
If you’re redecorating, renew the mastic first. Painting over failed mastic doesn’t seal it, and the new mastic is traditionally left unpainted. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and once it shows in Fortune Green, the repair is bigger than a sealant job.
The cost depends on the amount of work, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before work begins.
What you get with us
- An ARBOMaster approved applicator
- 4.9 on Google from 180+ five-star reviews
- Every job guaranteed for a year
- Quality sealants from Arbo and Everbuild
When to call us in Fortune Green
Decorating can disturb tired mastic. Many people find it crumbling when they prepare the windows, which is a good time to renew it.
It’s worth asking for a quote if you see:
- Draughty sash windows at the surround
- Old cement repairs round a window that have failed
- Gaps where the frame meets the masonry
- Mastic that needs renewing before redecorating
If you look after a building such as St Luke's Church of England School, its window and door frames need their mastic kept sound, just like a home’s.
Before you book anyone
- What the cure time is
- How the surfaces are prepared before sealing
- Who turns up on the day
- What guarantee comes with the work
How it works
Our applicators work methodically: protect, prepare, seal, tidy. Typically it takes a few hours for a single window, longer for several and we leave things clean and tidy. In Fortune 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.
- Each surround is checked first.
- The joint is raked out and cleaned.
- We fill deep gaps so the new mastic isn’t too thick.
- New sand mastic is applied and shaped by hand.
- The finish is dressed neatly.
Preparing for the visit
- On commercial sites, let us know about site rules
- Keep pets and children clear of the area while we work
- Mention if the joints have been sealed before
Getting 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 will come back to you with a quote.
Advice
Landlord and commercial work in Fortune Green
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance that we can handle for you.
From a single let to a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.