Greater London · England
Somers Town Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in Somers Town, with a one-year guarantee on every job. Ask us for a quote.
- Mastic dropping out of the joint
- Patchy fillers round a sash window
- A silicone bead on a sash window that spoils the look
Sand mastic in Somers Town, done properly
Our applicators renew the sand mastic around sash and case windows and doors set in stone or brick. The old mastic is raked out, the joint is prepared and new mastic is shaped by hand. We’re often asked to deal with cracked mastic round a front door frame and silicone on a period window that looks wrong, on sash and case windows, brick reveals and stone surrounds.
Much of London’s older housing was built with timber sash windows, some still in place and some long since replaced. Either way, the mastic between frame and brickwork is what stops draughts and rain getting in, in Somers Town as anywhere.
All our work is covered by a one-year guarantee, wherever you are in Greater London.
- Where
- Somers Town (NW1W, NW1, W1T)
- Region
- Greater London
- Guarantee
- One year on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
FAQs for Somers Town
Do you cover Somers Town for sand mastic?
Yes, Somers Town is within the area we cover. Our work covers London and the South East. Just ring 0345 464 0079 or send us an email with a few details of the job, and we’ll send you a clear quote.
Do you work for landlords with property near London Euston station?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or email us and tell us about the property, and we will give you a clear price.
Should I try DIY first?
Sometimes. Preparation is everything: all the old sealant out, and a clean, dry joint. If it doesn’t work out, we can redo it.
Which is right for my windows, sand mastic or modern sealant?
For period timber windows in stone or brick, sand mastic is often the better fit. Modern frames normally suit a flexible sealant, and we’ll explain why.
What’s sand mastic made of?
It’s sand mixed with a linseed-oil-based binder, used between timber frames and stone or brick.
Do you work for hotels and businesses?
Yes. Commercial and hotel work is a large part of what we do. Working times can be discussed when we quote.
Can you do several jobs on one visit?
Of course. Doing several areas at once is generally more efficient, so mention them when you ask for a quote.
Are you fully insured?
Yes. We are fully insured, with over 20 years’ experience in sealant work.
Can I do it myself?
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
Nearby places to Somers Town
Also in Somers Town
Landlord and commercial work in Somers Town
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Resealing at the right time is simple maintenance that we can handle for you.
In hotels, rooms out of use cost money, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
Honest limits
To be straight with you, some problems need a different trade:
- Damaged stone surrounds
- Timber that has rotted
- Sashes that need overhauling
If in doubt, ring 0345 464 0079 or email us and we will say what we think.
What we seal
- Stone surrounds
- Timber door frames
- Tenement windows
- Sash and case windows
- Period & listed homes
- Brick reveals
When to call us in Somers Town
Scraping and sanding before painting can loosen old mastic. Many people find it crumbling when they prepare the windows.
Signs it’s time to call us include:
- Gaps round a timber door in stone or brick
- Open joints round the window box
- Window mastic to renew ahead of painting
- Silicone on a period window that looks wrong
Managing a site like St Mary and St Pancras Church of England Primary School? Then its window and door frames need their mastic kept sound, just like a home’s.
Comparing quotes
- Whether you can choose the colour
- How long to leave it before use
- What happens if they find a problem under the old sealant
- What insurance they hold
What the job involves on each surface
Sash and case windows
The mastic round a sash window is on show, so a neat, even finish matters.
Tenement and terrace windows
In shared buildings, the windows may be part of a wider repair, so check who is responsible first.
How it works
There’s no need to move everything out, just the space around the work. Everything nearby is protected, and the work takes a few hours per window, depending on the condition of the joints for a typical job. For a job in Somers Town, parking and access are the things to plan: tell us about permits, visitor bays or off-street space, which floor we’re working on and whether there’s a lift.
- We check the window surrounds and agree which joints need renewing.
- Old, loose mastic is raked out and the joint cleaned.
- Deep voids are packed so the mastic is the right thickness.
- The mastic is mixed, pressed into the joint by hand and shaped.
- The finish is dressed so it sits neatly against the stone or brick.
Getting ready for the visit
- Let us know about stairs, lifts or work at height
- Tell us if parking is tricky
- Try not to wet indoor joints just before the visit
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 will explain what’s involved and send you a clear quote.
Read more
Somers Town homes and the weather
Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. In a converted house or block, who looks after the windows depends on the lease, so it’s worth checking before booking.
For an older house near a landmark such as St Mary's Church, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. As a London address, Somers Town can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
Somers Town is about 1 mile north-west of St Pancras, in Greater London. Homes, rented property, offices and hotels in Somers Town is covered for sand mastic, old or new, large or small. The work is guaranteed for a year. We cover 764 towns and villages across Greater London, from the larger towns to small villages.
We work across the NW1W, NW1 and W1T postcode area for sand mastic and the streets around it. You will find streets such as Euston Road, Duke's Road and Phoenix Road. Being close to the A400 and A501, Somers Town is simple for us to get to. Nearby, we also carry out sand mastic in Euston (1 mile south), Kings Cross (1 mile east), Agar Town (1 mile north), Bloomsbury (1 mile south-east) and Fitzrovia (1 mile south-west). Further out, we also cover London (3 miles south-east), Kensington (4 miles south-west), Walthamstow (6 miles north-east), Whitechapel (3 miles east), Hampstead (3 miles north-west) and Ruislip (12 miles west).
Local landmarks in Somers Town
In Somers Town, that means homes and buildings near Regent High School, Wellcome Collection and Lewis Cubitt Park, among other places. Also close by are UCL School of Slavonic and East European Studies (within half a mile south) and Prince Arthur pub (less than half a mile south-west). There’s a railway station in Somers Town itself: London Euston station. Other landmarks nearby include Brunswick Centre (0.6 miles south-east) and Montfichet's Tower (1.8 miles south-east). Green spaces nearby include Barnsbury Wood and St. James's Park Lake.
What happens if it’s left?
New sash windows are a major, costly change and on a listed home, consent may be needed. If the frames are sound, renewing the mastic deals with gaps and draughts at the surround. Damp from a failed joint spreads quietly in older London brickwork and timber, and once it shows in Somers Town, the repair is bigger than a sealant job.
No two jobs are quite the same, so we quote each one individually. Size, access and the product the joint needs all play a part, and we’ll explain the quote if you ask.
Why Somers Town clients choose us
- Tidy, careful work
- Anti-fungal sanitary silicone in wet areas
- Old sealant always removed completely
- Rated 4.9 stars on Google
Take a look at what affects the cost and what customers say.