Greater London · England
Sand Mastic in Arnos Grove
Sand mastic across Arnos Grove and nearby, with every bit of old sealant taken out first.
- Window mastic to renew ahead of painting
- Gaps round a timber door in stone or brick
- Mastic dropping out of the joint
Sand mastic in Arnos Grove
Burnt sand mastic is a traditional material blends with stone and brick surrounds. It suits period and listed homes, where modern sealant can look out of place. If you’re dealing with draughty sash windows at the surround and crumbling sand mastic round a window, we can help, whatever the surface.
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, in Arnos Grove as anywhere.
Whatever the size of the job, you get the same one-year guarantee in Arnos Grove and across Greater London.
- Location
- Arnos Grove (N11, N14, N13)
- Region
- Greater London
- Cover
- A year, on every job
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
What sealant work can’t fix
In fairness, there are a few things sealant will not fix:
- Planning or listed building consent (your local planning authority decides)
- Crumbling stone or brickwork round the window
- Putty and glazing repairs
If in doubt, phone 0345 464 0079 or send us an email and we’ll say what we think before booking.
Joints and surfaces we work on
- Timber door frames
- Stone surrounds
- Tenement windows
- Period & listed homes
- Sash and case windows
- Brick reveals
Windows and doors in Arnos Grove
The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. Historic houses like Bruce Castle (about 2.6 miles south-east) are a reminder that the area around Arnos Grove has older buildings as well as new. 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.
Homes close to Syro-Malabar Catholic Church of London include some older properties, and the joint between an old wall and a newer frame is normally the first place rain gets in. Arnos Grove is in London, so parking needs planning: let us know about parking bays, permits or a driveway. For site and facilities teams at buildings such as Bowes Primary School, larger buildings have plenty of frames, and the mastic around each one ages.
Arnos Grove is about 3 miles north-east of Finchley, in Greater London. Anywhere in N11, our applicators can take on sand mastic. Arnos Grove is one of 764 towns and villages in Greater London where we work for sand mastic. London is on our list too, about 8 miles from Arnos Grove.
We work across the N11, N14 and N13 postcode area for sand mastic. Streets in the area include Oak Lane, High Road and York Road, and we cover them all. You’ll find Arnos Grove on the A109 and A1004, which makes it straightforward to reach. Other places close to Arnos Grove include New Southgate (1 mile west), Bounds Green (1 mile south), Southgate (1 mile north), Palmers Green (1 mile east) and Oakthorpe Park (1 mile east). Further out, we also cover London (8 miles south), City of Westminster (7 miles south), Marylebone (7 miles south), Kensington (9 miles south), St Pancras (6 miles south) and Shoreditch (7 miles south).
Local landmarks in Arnos Grove
Locally, jobs take us to homes and businesses close to The Ranelagh pub, Broomfield School and Broomfield Park. Arnos Grove’s nearest station is New Southgate station, roughly 0.6 miles west. Nearby you will also find Broomfield House Museum (0.5 miles east) and The Mall Wood Green (1.7 miles south-east). Open spaces near Arnos Grove include Highgate Hill and Darland's Lake.
Common questions in Arnos Grove
Is parking an issue for sand mastic in Arnos Grove?
In much of London, parking needs planning: a visitor permit or a nearby bay makes the day run more smoothly, so mention what’s available when you book.
Do you work for landlords with property near New Southgate station?
Yes, landlords and agents are among the people we work for. You can call 0345 464 0079 or email us with the details for a clear quote.
Will there be a smell?
There can be a smell while the sealant cures, but it fades. Opening a window helps.
Is it possible to paint over sand mastic?
It’s traditionally left unpainted, as guidance on traditional windows advises. Talk to us before any painting near it.
How long will you be here?
As a guide, most jobs take a few hours per window, depending on the condition of the joints. Bigger jobs take longer, and we’ll tell you how long to expect.
Where is Mr Mastic based?
Our base is in Crawley, West Sussex, and we work across South East England, London and Scotland.
Should I check with the council before work on a listed or conservation-area home?
Your local planning authority is the one to ask. They’ll tell you if consent is needed for work to your windows.
Can you seal over the old sealant?
No, and we never do. It can look neat for a few weeks, but the new bead soon lifts. Removing the old sealant completely is the only lasting way.
How to look after the new joints
A little care helps the new joints last. Our advice:
- Plan mastic work ahead of painting
- Ask a joiner to look at soft timber first
- Make sure water runs off the sill
- Don’t run silicone over sand mastic
Don’t run silicone over the new mastic. If you see a crack, ask us to take a look rather than patching it.
It’s best to renew mastic before painting the windows. Painting over failed mastic hides the problem for a while.
How it works
At the end, we look at the finished work together. The visit itself usually takes anything from a few hours to a full day, depending on how many windows, depending on the amount of work. In Arnos Grove, flats, stairs and shared entrances are part of the routine. Mention any building rules, key holders or managing agents 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.
- Deep gaps are packed so the mastic sits at the right depth.
- We apply the mastic by hand and shape it.
- We dress the finish so it sits neatly against the masonry.
Preparing for the visit
- Mention any tricky access
- Let us know if you’ve seen damp or leaks
- Tell us about any previous sealing or DIY attempts
Get a quote
For a quote, phone 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. We will give you a clear quote before any work starts.
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Places near Arnos Grove
Also in Arnos Grove
Surface by surface
Sash and case windows
A sash window’s box frame sits in the masonry opening. The gap round it is pointed with sand mastic.
Period and listed homes
On a listed home or in a conservation area, the right material matters. Sand mastic is often the preferred finish.
Why it’s worth doing now in Arnos Grove
Draughts round a sash window are not always the sashes. Gaps between the frame and the wall can be just as bad and new mastic seals them. In London conversions, one flat’s bathroom is often above another flat’s ceiling, so a small leak from tired sealant can mean a neighbour’s ceiling and a lot of disruption. Putting it right early is much less trouble for homes in Arnos Grove.
The cost depends on how much there is to do, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before work begins.
Why us?
- 20+ years of sealant experience
- Anti-fungal sanitary silicone in wet areas
- Trusted Arbo and Everbuild sealants
- Homes, businesses and hotels
Take a look at what affects the cost or what customers say.
Landlords, agents and businesses in Arnos Grove
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. We can quote for more than one property at once.
For anyone letting property in or around Arnos Grove, several properties can be quoted together. Send us the addresses and the work at each, and pictures by email help.
How we quote for sand mastic
We don’t publish a price list, because jobs vary so much. What we look at:
- How many rooms, windows or areas are involved
- Whether the work is at height
- Any working-time requirements on site
- The amount of work
Rather than a set price list, we look at what your job involves: how many joints, what’s in them now and how we reach them. You will know the price before we begin.
Asking for a quote
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- The address or postcode of the job
- If someone has resealed it before
- Any access issues, like height or stairs
- How many joints, rooms or windows are involved
For sand mastic in Arnos Grove, call 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and we will agree the price before any work begins.