Greater London · England
Cricklewood Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for householders, landlords and businesses in Cricklewood. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Cracked mastic round a front door frame
- Tired mastic found when preparing windows for paint
- Weathered mastic on the most exposed windows
Keeping the joints in good condition
A little care helps the new joints last. Our advice:
- Ask us before painting near the mastic
- Take care around the mastic when scraping paint
- Keep modern sealant off the mastic
- Check with your local planning authority if your home is listed
Avoid painting over the new mastic, which is the traditional advice. If you are redecorating, ask us first.
Small cracks are a sign the mastic is ageing. It’s easier to renew it before it drops out.
Sand mastic in Cricklewood, 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 a mix of sand and a linseed-oil-based binder, applied by hand. On older homes, it suits the building far better than silicone. Typical jobs include mastic round period door frames that has failed and mastic worn away on windows facing the weather, across timber door frames, brick reveals and sash and case windows.
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 Cricklewood is something to talk through when you book.
Every job is covered by our one-year guarantee, wherever you are in Greater London.
- Location
- Cricklewood (NW2, NW6, NW10)
- Wider area
- Greater London
- Cover
- A year, on every job
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Surface by surface
Period and listed homes
Materials matter on listed and conservation-area homes. Like-for-like sand mastic is normally favoured.
Tenement and terrace windows
Tenements and terraces often have many sash windows with ageing mastic. We can do one window or several.
How we quote for sand mastic
We do not publish a price list, because jobs vary so much. The quote depends on:
- Working hours on commercial sites
- How much old sealant there is and how hard it is to remove
- Access and height
- Whether there’s mould to deal with
A few things move the cost up or down: the old material and how easily it comes out, whether mould needs treating, and whether the work is at height. We take all of that into account in your quote.
Asking for a quote
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- The address or postcode of the job
- What the problem is, such as mould, gaps, leaks or cracking
- Whether it has been sealed before
- Access, such as stairs, a lift or height
We do not publish a price list, as no two jobs are quite the same. Instead, we give you a clear quote for your job. To get started, call 0345 464 0079 or send us an email.
Questions from Cricklewood
Can parking be tricky for a visit in Cricklewood?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. The visit is then planned around what’s available.
Is Cricklewood in your area for sand mastic?
Yes. We work across London and the South East, and Cricklewood is part of that. You can call 0345 464 0079 or drop us an email and tell us what needs doing.
Will you leave a mess?
No. We protect the surfaces around the joints, and we tidy up before we go.
Do you guarantee sand mastic work?
Every job comes with our 12-month guarantee, and we’re fully insured.
Can new sealant go over the old?
No, because it fails. The old sealant always comes out first.
Are you insured?
Yes. We’re fully insured, and we’ve been doing sealant work for more than 20 years.
Do you hold any approvals?
Yes. We are ARBOMaster approved, the scheme for applicators of Arbo sealants.
Where are you based?
Our base is Crawley. We work across South East England, London and Scotland.
Frames and glazing around Cricklewood
With historic houses such as Fenton House (about 1.7 miles east) nearby, there’s older building stock in the area around Cricklewood as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. In London conversions and blocks, the lease decides who is responsible for the frames, so it’s worth checking before booking.
For an older house near a landmark such as St Gabriel's Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. Cricklewood is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
Cricklewood is about 1 mile north-west of Kilburn, in Greater London. From the centre of Cricklewood to the outskirts, we cover sand mastic for every kind of property. Cricklewood is one of 764 places in Greater London we cover for sand mastic. There’s also a page for London, about 7 miles away.
We work across NW2, NW6 and NW10 for sand mastic. Sand mastic is available to properties on Ivy Road, Walm Lane and Dean Road and the roads around them. Cricklewood sits on or near the A407, so getting to you is simple. Other places close to Cricklewood include Brondesbury (1 mile south-east), Willesden (1 mile south-west), Dollis Hill (1 mile north-west), Willesden Green (1 mile south-west) and Neasden (1 mile west). We also work in nearby towns such as London (7 miles south-east), City of Westminster (4 miles south-east), Marylebone (4 miles south-east), Kensington (4 miles south), St Pancras (5 miles south-east) and Shoreditch (6 miles east).
Around Cricklewood
In Cricklewood, that means homes and buildings near Hampstead School, The Crown Public House and Gladstone Park. There’s a railway station in Cricklewood itself: Cricklewood station. Other landmarks nearby include St Andrew's Hospital (0.8 miles north-west) and Brent Museum and Archives (0.7 miles south-west). For a walk, there’s Parliament Hill and Westbere Copse.
Common problems we fix in Cricklewood
Scraping and sanding before painting can loosen old mastic. Many people find it crumbling when they prepare the windows, which is a good time to renew it.
If you can see any of these, it’s time to have the joints looked at:
- Window mastic to renew ahead of painting
- Draughts and rain around sash boxes
- Gaps where the frame meets the masonry
- Mastic round period door frames that has failed
Managing a site like Anson Primary School? Then the mastic around its windows and doors needs looking after like any other building’s.
What to look for in a quote
- Who turns up on the day
- What the cure time is
- The length of the guarantee
- Is VAT in the price?
Can I do it myself?
If you are set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Leave it or put it right?
A silicone bead can be quicker, but on period stone or brick it often looks out of place. Sand mastic suits the building and blends with the stone or brick. In a London flat, a failed joint rarely stays your problem alone: water from a shower or window joint can reach the flat below, and gaps in fire-stopping matter to everyone in the building.
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed. Ask us for a quote and we’ll explain what it covers.
Why us?
- ARBOMaster approved applicator
- Quality sealants from Arbo and Everbuild
- Domestic, commercial and hotel work
- Sanitary silicone with an anti-fungal additive in wet areas
Places near Cricklewood
More services for Cricklewood
How the visit works
We keep the work tidy and contained to the joints we are treating, so you can carry on as normal. The job normally takes a few hours for a single window, longer for several. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Cricklewood. It helps if you can point us to a visitor permit or a bay close to the door.
- First we agree which joints need doing.
- Old mastic and any loose material are raked out.
- We pack any deep voids first.
- The sand mastic is mixed and pressed into the joint by hand.
- The surface is finished to suit the stone or brick.
Preparing for the visit
- Clear items away from the joints we’re working on
- Tell us if parking is tricky
- Let us know about earlier repairs to the joints
How to get a quote
For a quote, call 0345 464 0079 or email us with the location and a short description of the problem. You will have a clear quote before any work starts.