Greater London · England
Sand Mastic in Kentish Town
Specialist sand mastic for Kentish Town: careful preparation, the right product and tidy work. Call for a quick quote.
- Mastic round period door frames that has failed
- Old sand mastic that has cracked, crumbled or fallen out
- Window mastic to renew ahead of painting
Keeping the joints in good condition
Aftercare is simple:
- Keep modern sealant off the mastic
- Ask the planning authority about consent for listed or conservation-area homes
- Check the mastic when you check the paintwork
- Get any rot dealt with first
Check the mastic when you check the paintwork. Small cracks are easier to deal with early.
Gaps round a sash box let in draughts and rain. The longer it’s left, the more the joint opens.
Sand mastic for homes and businesses in Kentish Town
Sand mastic skins over fairly quickly, but it takes longer to harden fully. Traditional guidance is not to paint over it, so ask us before you decorate. We work on timber door frames, stone surrounds and brick reveals, and common reasons people get in touch are gaps where the frame meets the masonry and mastic worn away on windows facing the weather.
From mansion-block windows to modern glazing in new flats, London has every kind of frame. Over the years, the sealant around them shrinks, cracks and pulls away, letting in draughts and water.
Big or small, it’s backed by our one-year guarantee in Kentish Town and across Greater London.
- Location
- Kentish Town (NW5, NW1, NW3)
- Wider area
- Greater London
- Cover
- One year on every job
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Windows and doors in Kentish Town
Historic houses like Keats House (about 1.2 miles north-west) are a reminder that the area around Kentish Town has older buildings as well as new. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. In a converted house or block, who looks after the windows depends on the lease, so it’s worth checking before booking.
Rented homes near Kentish Town West station change hands often, and older sash windows in a rental need their mastic kept sound to keep the weather out. As a London address, Kentish Town can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
Kentish Town is about 2 miles east of Hampstead, in Greater London. Kentish Town gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Kentish Town is one of 764 towns and villages in Greater London we cover.
Work in NW5, NW1 and NW3 works the same way as everywhere else we cover. You’ll find streets such as Eton Road, Oval Road and Regal Lane. If you are just outside Kentish Town, we cover Chalk Farm (1 mile west), Camden Town (1 mile south-east), Gospel Oak (1 mile north), Primrose Hill (1 mile south-west) and Agar Town (1 mile south-east). Within a short drive, we also cover London (4 miles south-east), Kensington (4 miles south-west), Shoreditch (3 miles south-east), Walthamstow (6 miles north-east), Hoxton (3 miles east) and Whitechapel (4 miles south-east).
Near you in Kentish Town
In Kentish Town, that means homes and buildings near Primrose Hill, Haverstock School and North Bridge House School. Other local landmarks include The Hawley Arms (less than half a mile south) and Vaughan Williams Memorial Library (0.5 miles south). There’s a railway station in Kentish Town itself: Kentish Town West station. Well-known places in the area include O2 Centre (1.6 miles west) and Montfichet's Tower (2.9 miles south-east). For a walk, there’s The Long Water and Primrose Hill.
What happens on the day
A visit follows a simple pattern: we check the joints, protect the area around them, carry out the job and clear up. It normally takes anything from a few hours to a full day, depending on how many windows. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Kentish Town. 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.
- We pack any deep voids first.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
How to prepare
- Mention any leaks or damp you’ve noticed
- For business premises, tell us about site rules or sign-in
- Let us know about parking restrictions
Ask for a quote
For a quick quote, get us on the phone, or email us if that is easier. Describe what needs sealing and we’ll explain what’s involved and give you a clear quote.
Related advice
What sealant work can’t fix
Some problems need a builder, plumber or other trade rather than us:
- Cracked or broken glass
- Decisions on consent for listed homes
- Sashes that rattle, stick or won’t open
If you’re not sure, just ring 0345 464 0079 or drop us an email and we will give you a straight answer.
What we seal
- Brick reveals
- Timber door frames
- Stone surrounds
- Tenement windows
- Period & listed homes
- Sash and case windows
Towns and villages near Kentish Town
Other services in Kentish Town
For landlords and businesses
We work for landlords and agents as well as homeowners. Sealant work between tenants is a simple way to keep a property in good order before the next move-in.
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. Several properties can be quoted together.
Why deal with it now?
Cement-based fillers and modern sealants don’t always suit a period surround. Sand mastic matches what was there and that can be important for listed homes. 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 Kentish Town, the repair is bigger than the sealant job would have been.
A failed joint rarely gets cheaper to fix by waiting. If you are unsure, call 0345 464 0079 or email us for an honest opinion and a quote.
Why book with us
- Every job guaranteed for a year
- More than 20 years in sealant work
- Old sealant always removed completely
- ARBOMaster approved applicator
Common questions in Kentish Town
Is Kentish Town in your area for sand mastic?
Yes, Kentish Town is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or drop us an email and tell us what needs doing.
Is parking a problem for a job in Kentish Town?
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.
Do you work for landlords and businesses?
Yes, regularly. Several properties can go on one quote, and between tenancies is a good time for the work.
Do you offer different sealant colours?
We help you choose a colour that suits. The product needed can limit the range.
Can you replace silicone on a period window with sand mastic?
Yes, it’s a common request. All the old silicone is removed first so the mastic can sit properly.
I’m a tenant. Can you help?
We can work for tenants, landlords or agents. Just make sure your landlord agrees.
Is sand mastic better than silicone for my windows?
We’ll help you decide. Sand mastic suits many period homes, and modern sealants suit newer frames.
What information do you need?
The location, the problem and the rough size of the job. If you can, email a few pictures.
What affects the quote in Kentish Town
The price is agreed before any work begins. It takes into account:
- How many areas need sealing
- The old material and how stubborn it is
- The amount of work
- When we can work, for business premises
We do not show prices on the website, because each job is priced on what it involves. Call for a quick quote.
Helping us quote
Photos help, but a description is a good start. Please mention:
- What the problem is, such as mould, gaps, leaks or cracking
- Any access issues, like height or stairs
- How many joints, rooms or windows are involved
- Photos by email, if that is easy
For sand mastic in Kentish Town, phone 0345 464 0079 or email us. Tell us what the problem is and where, and you’ll get a clear quote before we start.
What we are called out for in Kentish Town
Most of it is simply age. Even well-laid mastic needs renewing in time, depending on exposure and upkeep.
The problems people usually mention when they call are:
- Open joints round the window box
- Mastic dropping out of the joint
- Mastic round period door frames that has failed
- Cement or filler used on old window joints that has cracked
Homes close to Church of the Holy Trinity with St Barnabas include some older properties, and the joint between an old wall and a newer frame is normally the first place rain gets in.
What to look for in a quote
- Whether the sealant suits the joint
- The length of the guarantee
- Is the old sealant removed completely?
- Whether VAT is included