Greater London · England
Window & door mastic in Farringdon, Greater London
Window and door frames in Farringdon need attention? We remove the old material, prepare the joints and seal them properly.
- Cracked sealant at the sill ends
- Gaps between the frame and the inside reveal
- Sealant in the wrong colour for the frame
Window mastic in Farringdon, done properly
Over two decades of sealing frames has taught us which products suit which walls. We are fully insured ARBOMaster approved applicators, and every job is covered by a 12-month guarantee. We work on timber windows & doors, composite doors and aluminium frames, and the jobs we see most are black, perished sealant on frames and mastic that has split away from the wall.
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, letting in draughts and water.
A 12-month guarantee comes as standard.
- Place
- Farringdon (EC1V, EC1R, EC1P)
- Region
- Greater London
- Guarantee
- One year on every job
- Quote
- A clear price before work begins
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Can I do it myself?
A DIY attempt doesn’t rule out a professional job. We cut it out and start again.
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions.
How to look after the new joints
To keep the joints looking good and working properly:
- Keep solvents and bleach off the sealant
- Walk round the house once a year and look at the joints
- Keep jet washers away from the mastic
- Clean frames with a soft cloth and soapy water
Have a look at the joints once a year, ideally after winter. Small splits are simple to catch before they leak.
On timber windows, water behind the joint can lead to rot. Rotten timber needs a joiner, not a sealant, so early resealing is worth it.
Windows and doors in Farringdon
With historic houses such as Dr Johnson's House (about 0.4 miles south-west) nearby, there’s older building stock in the area around Farringdon as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
As a London address, Farringdon can be tricky for parking: let us know about parking bays, permits or a driveway. For an older house near a landmark such as St John Clerkenwell, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Farringdon is about 2 miles north of London, in Greater London. From the centre of Farringdon to the outskirts, we cover window mastic for every kind of property. 764 places in Greater London are on our list, large and small.
Every address in EC1V, EC1R and EC1P is covered for window mastic. That includes homes and businesses on Oat Lane, Shoe Lane and Long Lane. Being close to the A1 and A4, Farringdon is easy for our applicators to reach for window mastic. Close by, we work in Smithfield (1 mile south), Clerkenwell (1 mile north), Holborn (1 mile west), Blackfriars (1 mile south) and Temple Bar (1 mile south-west). Further out, we also cover Kensington (4 miles west), Walthamstow (6 miles north-east), Hampstead (4 miles north-west), Ruislip (14 miles west), Brompton (3 miles south-west) and Stockwell (4 miles south).
Local landmarks in Farringdon
Locally, jobs take us to homes and businesses close to The Castle Public House, St Mary-at-Hill and Barts Health Archives. Also close by are St Peter and St Paul RC Primary School (within half a mile north), Barbican Conservatory (less than half a mile east) and Central Foundation Boys' School (0.8 miles east). Farringdon has its own railway station: Farringdon station. Nearby you’ll also find Museum of the Order of St John (within half a mile north-east) and Gabriel's Wharf (0.9 miles south). Not far away are Ludgate Hill and Barnsbury Wood.
How it works
There’s no need to move everything out, only the area right around the joints. Everything nearby is protected, and the job takes a few hours for a handful of frames, longer for a whole house for a typical job. In Farringdon, as in most of London, parking needs a little planning. A visitor permit or a nearby bay makes the visit run more smoothly.
- Each frame is looked over and we agree which ones need resealing.
- We remove the old mastic and clean the frame edge and wall.
- Deep gaps get closed-cell backing rod to set the depth.
- A flexible exterior sealant is applied in a colour to suit the frame.
- We tool each bead neatly and check every joint is closed.
How to prepare
- Let us know about stairs, lifts or work at height
- Let us know about parking restrictions
- Let us know about earlier repairs to the joints
Getting a quote
Call for a quick quote, or email us if that’s easier. Describe what needs sealing and we will explain what’s involved before giving you a price.
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When it is not the sealant
New sealant cannot fix everything, and we will tell you before any work starts. It won’t solve:
- Penetrating damp from a failed cavity tray or render
- Soft or decayed wood in the frame
- Draughts through the window seals rather than the frame
If in doubt, phone 0345 464 0079 or send us an email and we’ll say what we think.
Joints and surfaces we work on
- uPVC windows
- Composite doors
- Aluminium frames
- Patio & French doors
- Timber windows & doors
- Window sills
Signs you need window mastic in Farringdon
Some failures date back to when the windows were fitted. Mastic laid onto dusty, damp or crumbling surfaces didn’t grip properly, so it comes away long before its time.
These are the problems we are asked about most:
- Water coming in at the bottom corners of a door
- Rushed sealant from a window installation
- Mastic that has split away from the wall
- Mastic that is falling out in pieces
Letting a property close to Farringdon station? Then sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
What to look for in a quote
- How much experience the applicator has
- What preparation is included
- What the cure time is
- Whether you can choose the colour
Landlord and commercial work in Farringdon
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we will give you a quote.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. Several properties can go on one quote.
What affects the quote in Farringdon
Call for a quick quote. The main things that affect it are:
- Whether old sealant or filler has to be cut out
- The number of rooms or windows
- The type of sealant required
- Any working-time requirements on site
Commercial jobs are quoted on the same basis as homes: the amount of work, how we reach it and what it needs, along with when we can work on site. Call for a quick quote and we will go through it with you.
What we need to know
What to tell us when you ask for a quote:
- The problem you’ve noticed
- If someone has resealed it before
- If it’s domestic, commercial or a hotel
- How we’d reach the joints
To get 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 work begins.
Nearby places to Farringdon
What else we do in Farringdon
Common questions in Farringdon
Can you help a landlord with a rental near Farringdon station?
Yes, we work for letting agents and landlords. You can call 0345 464 0079 or email us with the address and a few details, and we will give you a fixed price before we start.
Is parking a problem for a job in Farringdon?
Parking in Farringdon, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly.
Can I add another job to the visit?
Yes. More than one area can be quoted together.
Can new window sealant be painted?
Silicone generally will not take paint. Let us know beforehand, and we’ll use a paintable product where it suits.
Where do you work from?
Our base is in Crawley, and we work across South East England, London and Scotland.
How long does it take to reseal the windows on a house?
Allow a morning for a couple of windows and a door. Access and the amount of old mastic make the biggest difference.
Can you do the inside joint as well?
Yes. The outside joint keeps the weather out, and the inside joint stops draughts and finishes the reveal. We do one or both.
Is it worth trying it myself?
That depends on the joint. High-level, external movement and fire-rated joints are professional jobs.