Greater London · England
Arkley Sand Mastic
Specialist sand mastic for Arkley: careful preparation, the right product and tidy work. Call for a quick quote.
- Draughty sash windows at the surround
- Old cement repairs round a window that have failed
- Cracked mastic round a front door frame
Sand mastic in Arkley, done properly
Old sand mastic cracks, crumbles and falls out over time, leaving gaps round the window. We rake it out and renew it and tidies the surround. We work on brick reveals, period & listed homes and timber door frames, and the jobs we see most are failed mastic on an exposed elevation and open joints round the window box.
London has a lot of flats and conversions, where windows are often on upper floors. In a converted house or block, the lease usually says who is responsible for the windows, so it’s worth checking before booking.
The work is covered for a year after we finish. If there’s a problem with it, please phone 0345 464 0079 or drop us an email.
- Place
- Arkley (EN5, NW7)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
What affects the quote in Arkley
Jobs vary more than people expect. What affects the quote:
- Whether old sealant or filler has to be cut out
- The number and length of the joints
- Whether there’s mould to deal with
- Access and height
A few things move the cost up or down: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether the work is at height. We take all of that into account in your quote.
What we need to know
There’s no need for technical detail. Just tell us:
- The rough size of the job
- Whether it’s a home or a business
- Where the job is, and your postcode
- A few pictures by email, if you can
Every job is quoted individually, so the first step is telling us about yours. Just ring 0345 464 0079 or drop us an email with the details, and photos are welcome.
Places near Arkley
Other services in Arkley
Arkley questions
Can parking be tricky for a visit in Arkley?
Parking in Arkley, as in most of London, takes a little planning: a visitor permit or a bay close to the door helps a lot, so mention what’s available when you book.
I let a flat near Elstree & Borehamwood station. Can you help?
Yes. We work for landlords and letting agents as well as householders. Just call 0345 464 0079 or send us an email with the address and what needs doing, and we’ll send you a clear quote.
What exactly is sand mastic?
A traditional pointing material made from sand and a linseed-oil-based binder, used between timber frames and stone or brick.
Can you work on commercial sites?
Yes. Commercial and hotel work is a large part of what we do, as well as homes. We can talk about working times when we quote.
What sealant do you use?
Products from Arbo and Everbuild, among others, chosen to suit the joint. We will tell you what we’re using and why.
How do I get a quote for sand mastic in Arkley?
Size, access and the old material all affect the cost. Ask us for a quote and we will talk you through it.
Do I have to be there?
We need access to the joints, so we will agree that with you when we book. Indoors, that usually means someone at home.
When will the new mastic be hard?
A skin forms quite soon, but full hardening takes longer. We will explain what to expect before we leave.
Sand mastic in Arkley: local notes
In London conversions and blocks, the lease decides who is responsible for the frames, so it’s worth checking before booking. London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
In the older streets around St Peter's Church, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. For landlords with property near Elstree & Borehamwood station, any sash windows need sound mastic to keep draughts and rain out. Arkley is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Arkley is about 2 miles west of Barnet, in Greater London. Jobs in Arkley get the same care as everywhere else we work: old sealant removed completely, careful preparation and a one-year guarantee. We cover 764 towns and villages across Greater London, from the larger towns to small villages. You can also see our page for London, about 12 miles away.
Jobs for sand mastic in EN5 and NW7 is quoted and booked the same way as anywhere else. Streets in the area include Well Road, Glebe Lane and Brett Road, all of which we cover. You will find Arkley on the A411, so it’s easy for us to get to. Neighbouring places we cover for sand mastic include Rowley Green (1 mile north-west), High Barnet (1 mile north-east), Hadley (1 mile north-east), Totteridge (2 miles south-east) and Well End (2 miles north-west). Larger places within reach include London (12 miles south-east), City of Westminster (10 miles south), Marylebone (10 miles south), Kensington (10 miles south), St Pancras (10 miles south-east) and Shoreditch (11 miles south-east).
Landmarks near Arkley
Locally, jobs take us to homes and businesses close to Susi Earnshaw Theatre School, Whitings Hill Open Space and Queen Elizabeth's School. Arkley’s nearest station is Elstree & Borehamwood station, roughly 2.1 miles west of the centre. Nearby you will also find Hilfield Castle (4.5 miles west) and Hertfordshire Scout Museum (1.9 miles north-west). Open spaces near Arkley include Glebe Lane Pastures and Darland's Lake.
Looking after it afterwards
To keep the joints looking good and working properly:
- Clear gutters so water doesn’t pour onto the windows
- Find out about consent before window work on a listed home
- Keep modern sealant off the mastic
- Get any rot dealt with first
Avoid painting over the new mastic, which is the traditional advice. If you’re redecorating, ask us first.
An open joint round the box lets weather through. The longer it’s left, the more the joint opens.
Work for landlords, hotels and businesses
Whether it’s one flat or a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
Failed sealant is one of the commonest items on a check-out report. We can quote for more than one property at once.
Why it’s worth doing now in Arkley
Not every draught comes from the sashes themselves. Gaps between the frame and the wall can be just as bad, and renewing the mastic closes them. In a flat in Arkley, failed sealant seldom stays inside your own four walls: water can reach the neighbours below, and gaps in fire-rated joints affect the whole building.
The cost reflects the work involved, not a rough estimate. That’s why we ask a few questions first and give you a clear price before we start.
Why Arkley customers choose us
- We never seal over old sealant
- Sanitary silicone with an anti-fungal additive in wet areas
- 4.9 on Google from 180+ five-star reviews
- Approved under the ARBOMaster scheme
Read what affects the cost or our reviews.
When something else is needed
We will always be straight with you, so here’s what new sealant will not do:
- Sash cords, weights and draught-proofing of the sashes
- Timber that has rotted
- Masonry that needs repairing
Not sure which it is? You can ring 0345 464 0079 or email us and we’ll tell you honestly.
Where we work in Arkley
- Sash and case windows
- Brick reveals
- Period & listed homes
- Stone surrounds
- Timber door frames
- Tenement windows
How it works
Most of a good job is in the preparation, and we do not rush it. Joints are cleaned back and dried before anything new goes in. In total, it normally takes a few hours per window, depending on the condition of the joints. In Arkley, flats, stairs and shared entrances are part of the routine. If the building has a concierge, managing agent or access rules, tell us when you book.
- We look at the surrounds with you and agree the joints to renew.
- 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
- Mention any sign-in or site rules at work premises
- Keep children and pets away from the work area
- Let us know about earlier repairs to the joints
Ask for a quote
For a quick quote, get us on the phone, or email us if that’s easier. Tell us about the joints that need doing and we will talk you through the work before giving you a price.
Read more
Should I try it myself first?
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.
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.