Greater London · England
Sand mastic for sash & case windows in Holloway, Greater London
Professional sand mastic in and around Holloway, with every bit of old sealant taken out first.
- Cracked mastic round a front door frame
- Tired mastic found when preparing windows for paint
- Cement or filler used on old window joints that has cracked
About our sand mastic in Holloway
Traditional burnt sand mastic blends with stone and brick surrounds. It suits period and listed homes, where modern sealant can look out of place. If you are dealing with modern sealant on a period surround and cracked mastic round a front door frame, we can put it right, whatever the surface.
London’s Victorian and Edwardian terraces were built with timber sash windows, and many still have them or their replacements. Whatever is in the opening now, the joint between frame and wall is what keeps the weather out, in Holloway as anywhere.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Location
- Holloway (N7, N19, N4)
- Region
- Greater London
- Guarantee
- One year on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
DIY sealant or a professional job?
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
Honest limits
We’d rather tell you now than do work that won’t last, so here’s what sealant cannot put right:
- Broken panes
- Whether work needs listed building consent
- Sashes that rattle, stick or won’t open
If you are not sure, just phone 0345 464 0079 or drop us an email and we’ll give you a straight answer before booking.
What we seal
- Period & listed homes
- Timber door frames
- Tenement windows
- Sash and case windows
- Stone surrounds
- Brick reveals
How the visit works
There isn’t much for you to do on the day. Point us to the joints and we will get on with it. The job generally takes a few hours per window, depending on the condition of the joints. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Holloway. It helps if you can point us to a visitor permit or a bay close to the door.
- 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.
Before we arrive
- Where the joints are inside, avoid wetting them before we arrive
- Keep pets and children clear of the area while we work
- Move anything stored near the joints
Ask for a quote
There’s no standard price list. Instead, we give you a clear quote for your job. To get started, phone 0345 464 0079 or send us an email.
Advice
What we are called out for in Holloway
Scraping and sanding before painting can loosen old mastic. Many people find it crumbling when they prepare the windows.
It’s worth asking for a quote if you see:
- Window mastic to renew ahead of painting
- Mastic worn away on windows facing the weather
- A silicone bead on a sash window that spoils the look
- Old sand mastic that has cracked, crumbled or fallen out
As a London address, Holloway can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
Comparing quotes
- Are they insured?
- Is VAT in the price?
- Who turns up on the day
- When the joint can take water or movement
Holloway: your questions answered
Is parking an issue for sand mastic in Holloway?
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 help a landlord with a rental near Drayton Park station?
Yes, we work for letting agents and landlords. Just call 0345 464 0079 or drop us an email and tell us about the property, and we will give you a clear price.
Can you quote for more than one area?
Yes, and it often makes sense. Combining jobs makes good use of the visit.
How long does the job take?
That depends on the amount of work, but most jobs take anything from a few hours to a full day, depending on how many windows. We’ll give you a better idea when we quote.
Will there be a smell?
Possibly a little. Any smell clears as the sealant cures.
Can you match the sealant colour?
Most of the time, yes. We will tell you which colours the right product comes in.
Do I need permission for sand mastic on a listed building?
Speak to your local planning authority before work starts. Sand mastic is often favoured as like for like, but they decide.
Does someone need to be in?
That depends on where the joints are. Inside work needs someone to give us access.
Towns and villages near Holloway
More services for Holloway
How to look after the new joints
So the new joints stay in good condition:
- Inspect the joints round the windows every year or so
- Take care around the mastic when scraping paint
- Check with your local planning authority if your home is listed
- Plan mastic work ahead of painting
Keep paint scrapers and sanders off the mastic when redecorating. Hard scraping can loosen it.
Small cracks are a sign the mastic is ageing. Renewing it then is simpler than waiting until it falls out.
Work for landlords, hotels and businesses
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance that we can handle for you.
We also work for property managers and facilities teams in Holloway and across Greater London. We can quote a run of properties together.
Why deal with it now?
Silicone might seem the quicker option, but it can look wrong on a period surround. Sand mastic is the traditional material and blends with the stone or brick. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and by the time it shows on a wall or ceiling in Holloway, the repair is bigger than the sealant job would have been.
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all play a part.
Why book with us
- Domestic, commercial and hotel work
- Sanitary silicone with an anti-fungal additive in wet areas
- Fully insured
- Every job guaranteed for a year
Frames and glazing around Holloway
In London conversions and blocks, the lease decides who is responsible for the frames, so check that before you book. Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you live in an older home near St Joseph and St Padarn's Church, the joint between an old wall and a newer frame is generally the first place rain gets in. Letting a property close to Drayton Park station? Then cracked sand mastic around sash windows lets in the draughts tenants complain about.
Holloway is about 2 miles north-west of Hoxton, in Greater London. Holloway gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Holloway is one of 764 towns and villages in Greater London we cover.
Every address in N7, N19 and N4 is covered for sand mastic. Streets in the area include Penn Road, Lough Road and Tabley Road, and we cover them all. Close by, we work in Nag's Head (1 mile north), Lower Holloway (1 mile south), Tufnell Park (1 mile west), Upper Holloway (1 mile north-west) and Barnsbury (1 mile south). We also work in nearby towns such as London (4 miles south), City of Westminster (3 miles south-west), Marylebone (3 miles south-west), Kensington (5 miles south-west), Shoreditch (3 miles south-east) and Walthamstow (5 miles north-east).
What’s near Holloway
Locally, jobs take us to homes and businesses close to Vaughan Williams Memorial Library, Whittington Park and Beacon High, among other places. You’ll also find Musical Theatre Academy (0.8 miles south-east) and The Coronet pub (under half a mile south-east). The nearest railway station is Drayton Park station, about 0.6 miles south-east of the centre. A little further out are Brunswick Centre (2.3 miles south) and Montfichet's Tower (3.1 miles south). Open spaces near Holloway include St. James's Park Lake and Dartmouth Park Hill.