Greater London · England
Sand mastic for sash & case windows in Totteridge, Greater London
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in Totteridge and across Greater London. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Old cement repairs round a window that have failed
- Draughts and rain around sash boxes
- Crumbling sand mastic round a window
Quotes for sand mastic in Totteridge
Your quote is based on your job. We take into account:
- Any mould that needs treating
- The amount of work
- Any working-time requirements on site
- The type of sealant required
No two jobs are quite the same, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all play a part.
Asking for a quote
Photos help, but a description is a good start. Try to tell us:
- Whether it has been sealed before
- How we’d reach the joints
- Whether it’s a home or a business
- The address or postcode of the job
For a quote, phone 0345 464 0079 or email us and tell us where the job is and what the problem looks like. You will have a clear quote before any work starts.
How we handle sand mastic in Totteridge
Fresh sand mastic forms a skin quite soon but full hardening takes longer. Traditionally, sand mastic is left unpainted, so ask us before you decorate. We are often asked to deal with failed mastic on an exposed elevation and open joints round the window box, across tenement windows, sash and case windows and stone surrounds.
From mansion-block windows to modern glazing in new flats, London has every kind of frame. The mastic around them dries out and cracks with age, letting in draughts and water.
A one-year guarantee comes as standard.
- Where
- Totteridge (N20, EN5)
- Region
- Greater London
- Guarantee
- 12 months on all our work
- Price
- A clear price before we start
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Honest limits
It helps to know what we cannot do:
- Masonry that needs repairing
- Cracked or broken glass
- Sash cords, weights and draught-proofing of the sashes
Not sure which it is? You can call 0345 464 0079 or send us an email and we will tell you honestly before booking.
Joints and surfaces we work on
- Sash and case windows
- Period & listed homes
- Timber door frames
- Stone surrounds
- Tenement windows
- Brick reveals
Why it’s worth doing now in Totteridge
Draughts round a sash window are not always the sashes. Gaps between the frame and the wall can be just as bad, and renewing the mastic closes 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.
There are no prices on our website, because each job is priced on what it involves. For a quick quote, please ring 0345 464 0079 or drop us an email.
What you get with us
- We leave the area clean and tidy
- Over 20 years’ experience
- Fully insured
- Homes, businesses and hotels
See what affects the cost and what customers say.
The process
The work is kept neat and contained to the joints we are treating, so you can get on with your day. The job usually takes a few hours per window, depending on the condition of the joints, and we tell you how long to leave it before we go. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Totteridge. A visitor permit or a nearby bay makes the visit run more smoothly.
- 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.
- The surface is finished to suit the stone or brick.
How to prepare
- Keep children and pets away from the work area
- Let us know if you’ve seen damp or leaks
- Try not to wet indoor joints just before the visit
Ask for a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and email photos if that’s easy.
Read more
Surface by surface
Tenement and terrace windows
In shared buildings, the windows may be part of a wider repair, so check who is responsible first.
Brick reveals
An open joint at a brick reveal lets weather in. New mastic seals the gap.
Can I do it myself?
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
If you’ve already had a go yourself, that’s fine. We cut it out and start again, so tell us about it when you ask for a quote.
Totteridge: your questions answered
Do you cover Totteridge for sand mastic?
Yes, Totteridge is within the area we cover. Our work covers London and the South East. Just call 0345 464 0079 or drop us an email with a few details of the job.
Is parking an issue for sand mastic in Totteridge?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. That way the visit can be planned around it.
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.
What do you need from me for a quote?
Tell us what needs doing and where, plus photos if you have them. If we need more, we’ll ask.
How long does sand mastic take?
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 say how long yours will take.
Do you work for landlords and businesses?
Yes, often. Several properties can be quoted together.
Can tenants book the work?
Yes. Ask your landlord first, and we can send them the quote if that helps.
Can you seal over the old sealant?
No, it will not last. It can look neat for a few weeks, but the new layer lifts away from the old one. Removing the old sealant completely is the only lasting way.
Also near Totteridge
Other services in Totteridge
Windows and doors in Totteridge
With historic houses such as Wyllyotts Manor (about 4.2 miles north) nearby, there’s older building stock in the area around Totteridge 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. In a converted house or block, who looks after the windows depends on the lease, so check that before booking.
As a London address, Totteridge can be tricky for parking: tell us about permits, visitor bays or off-street space when you book. Schools such as The Totteridge Academy are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages.
Totteridge is about 1 mile south-west of Barnet, in Greater London. Every kind of property in Totteridge is covered for sand mastic, old or new, large or small. Every job comes with our 12-month guarantee. Our Greater London coverage runs to 764 places, Totteridge among them. There’s also a page for London, roughly 10 miles from Totteridge.
Jobs for sand mastic in N20 and EN5 is quoted and booked the same way as anywhere else. Streets in the area include Barnet Lane, Grange Avenue and Chestnut Lane. We also cover the places around Totteridge: Hadley (1 mile north), High Barnet (1 mile north), Arkley (2 miles north-west), Mill Hill (2 miles south-west) and Rowley Green (2 miles north-west). Further out, we also cover London (10 miles south-east), City of Westminster (9 miles south), Marylebone (8 miles south), Kensington (9 miles south), St Pancras (8 miles south-east) and Shoreditch (9 miles south-east).
Local landmarks in Totteridge
In Totteridge, that means homes and buildings near Francis Skaryna Belarusian Library and Museum, Susi Earnshaw Theatre School and Brook Farm Open Space. The nearest railway station is Oakleigh Park station, about 1.5 miles east of the centre. Well-known places in the area include Francis Skaryna Belarusian Library and Museum (1.5 miles south-east) and Barnet General Hospital (1.3 miles north-west). Green spaces nearby include Totteridge Green and Darland's Lake.
Common problems we fix in Totteridge
Water gets into small cracks in the mastic and loosens it further. Windows facing the weather tend to go first.
These are the problems we’re asked about most:
- Gaps round a timber door in stone or brick
- Gaps where the frame meets the masonry
- Weathered mastic on the most exposed windows
- Wind and rain getting in round a sash window
For an older house near a landmark such as St Andrew's Church, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Questions to ask before booking
- Which sealant they’ll use, and why
- Whether VAT is included
- When the joint can take water or movement
- The length of the guarantee