Greater London · England
Window Mastic in Somers Town
Mastic around window and door frames, sills and patio doors for Somers Town, backed by a one-year guarantee. Call for a quick quote.
- A bead that doesn’t match the frame
- Leaking joints at the ends of sills
- Rain getting in at the frame or under the sill
Window mastic in Somers Town
Around Somers Town we seal all kinds of frames: from uPVC casements to timber and aluminium, along with patio doors, French doors and sills. The sealant is chosen to suit the frame material and the wall. Common call-outs are for damp patches on the reveal after heavy rain and draughts coming in around windows and doors, across window sills, uPVC windows and timber windows & doors.
London homes have every kind of window, from timber sashes in period terraces to aluminium and uPVC in newer blocks. The mastic around them dries out and cracks with age, which is when draughts and damp patches appear in homes in Somers Town.
We stand behind the work with a 12-month guarantee, so you are not left on your own once the job is done.
- Place
- Somers Town (NW1W, NW1, W1T)
- Region
- Greater London
- Guarantee
- One year on every job
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Questions from Somers Town
Can you help a landlord with a rental near London Euston station?
Yes, we work for landlords and letting agents. You can ring 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before work begins.
Do you cover Somers Town for window mastic?
Yes. Our work covers London and the South East, and Somers Town is part of that. You can call 0345 464 0079 or email us and tell us what needs doing.
How do I get a quote for window mastic in Somers Town?
Every job is different, so each one gets its own quote. For a quick quote, ring 0345 464 0079 or email us and tell us what needs doing and where.
Does someone need to be in?
It depends on the job. Inside work needs someone to give us access.
Do you hold any approvals?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we are part of it.
Will there be a smell?
Possibly a little. Any smell clears as the sealant cures, and ventilation helps.
Where are you based?
We work from Crawley. We cover Somers Town and the rest of Greater London, along with the rest of our area.
Are you fully insured?
Yes. We’re fully insured, and we have been doing sealant work for more than 20 years.
Can I do it myself?
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions.
Why it’s worth doing now in Somers Town
Draughts and leaks do not always mean new windows. If the frames and glass are in good order, resealing the joints is often all that is needed. Problems with the glass or gaskets are for a window company, and we’ll say so. In a London flat, a failed joint rarely stays your problem alone: water can reach the neighbours below, and gaps in fire-rated joints affect the whole building.
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you’re unsure, call 0345 464 0079 or drop us an email for an honest opinion and a quote.
Why Somers Town customers choose us
- We never seal over old sealant
- Sealant colour chosen to suit
- 20+ years of sealant experience
- A choice of colours where the product allows
Read what affects the cost and our reviews.
Aftercare tips
No joint lasts for ever, but care makes a real difference. Our tips:
- Ventilate rooms so frames don’t stay wet inside
- Make sure the drainage slots are not blocked
- Walk round the house once a year and look at the joints
- Keep jet washers away from the mastic
Keep sill grooves and drainage slots clear, so rain drains out rather than building up at the sealant.
A small gap around a frame only grows. As the old mastic shrinks further, more air gets through, and a cold room gets colder. Resealing closes it.
When it isn’t the sealant
We’d rather tell you now than do work that will not last, so these are the limits:
- Faulty window hardware
- Penetrating damp from a failed cavity tray or render
- A failed sealed unit that has misted up
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we’ll tell you honestly.
Surfaces we seal
- Aluminium frames
- Patio & French doors
- Window sills
- Composite doors
- uPVC windows
- Timber windows & doors
How we quote for window mastic
Some jobs are bigger than they look, and some smaller. The main factors:
- The number of rooms or windows
- Whether there’s mould to deal with
- Whether the work is at height
- The old material and how stubborn it is
Some things make a job bigger or smaller: the old material and how easily it comes out, whether mould needs treating, and whether the work is at height. Your quote takes all of that into account.
Asking for a quote
Photos by email are helpful but not essential. Please mention:
- The type of property
- A few photos by email, if you can
- Access, such as stairs, a lift or height
- Any previous sealing or DIY work
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 pictures if that’s easy.
Also near Somers Town
What else we do in Somers Town
What the job involves on each surface
uPVC windows
We clean the frame edge carefully so the plastic is not marked, then the new bead is laid against the frame and the wall and tooled smooth.
Aluminium frames
Aluminium moves with heat, and the frames are often slimmer than uPVC. A neat, narrow bead in a colour to match suits the frame.
Frames and glazing around Somers Town
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. In a converted house or block, who looks after the windows depends on the lease, so check that before booking.
Homes close to St Mary's Church include some older properties, and the joint between an old wall and a newer frame is normally the first place rain gets in. Letting a property close to London Euston station? Then sound mastic around windows and doors keeps out the draughts and damp that tenants notice first. For site and facilities teams at buildings such as St Mary and St Pancras Church of England Primary School, larger buildings have plenty of frames, and the mastic around each one ages.
Somers Town is about 1 mile north-west of St Pancras, in Greater London. Anywhere in NW1W, we can carry out window mastic at your property. 764 places in Greater London are on our list, from the larger towns to small villages.
Here we cover the NW1W, NW1 and W1T postcode area for window mastic. If you need window mastic at a property on Euston Road, Duke's Road and Phoenix Road or a nearby road, our applicators can take on the job. Somers Town sits on or near the A400 and A501, so getting to you is simple. Nearby, we also carry out window 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). We also work in nearby towns such as 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
Locally, jobs take us to homes and businesses close to Regent High School, Wellcome Collection and Lewis Cubitt Park, among other places. Also close by are UCL School of Slavonic and East European Studies (under 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. Nearby you will also find Brunswick Centre (0.6 miles south-east) and Montfichet's Tower (1.8 miles south-east). Not far away are Barnsbury Wood and St. James's Park Lake.
How it works
The work is kept neat and contained to the joints we are treating. The job normally takes a morning for a couple of windows and a door, and we tell you how long to leave it before we go. In Somers Town, flats, stairs and shared entrances are part of the routine. Mention any building rules, key holders or managing agents when you book.
- First we look at every frame and agree the list.
- Next the failed sealant is cut away and the joint cleaned.
- We fit backing rod in deep gaps so the sealant is the right depth.
- We apply a weatherproof sealant to match the frame and tool it neatly.
- Finally we tidy up and check each joint.
Getting ready for the visit
- Plan for the work area to be out of bounds to pets and children
- Mention any leaks or damp you’ve noticed
- On commercial sites, let us know about site rules
How to get a quote
If you’re in Somers Town and need window mastic, ring 0345 464 0079 or drop us an email. Tell us what the problem is and where, and you will get a clear quote before work begins.