Greater London · England
Glazing & conservatory sealant in St James's, Greater London
Glazing silicone for conservatories, rooflights, glass panels and shower screens for homes and businesses in St James's and across Greater London. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Leaking glazing joints on a rooflight
- Shower screens leaking along the wall or tray
- Drips on the inside of a conservatory window
Aftercare tips
After the cure time, these simple habits help:
- Ventilate the conservatory to cut condensation
- Wipe the screen down after showering
- Get a new leak looked at quickly
- Use gentle products around the joints
Squeegee a shower screen after each shower and let the room air. It helps stop mould getting into the silicone.
Act on black or lifting silicone early. Peeling silicone lets water in behind and the leak gets worse.
Glazing silicone in St James's
Not every silicone suits glass. We use a neutral-cure glazing silicone that is suited to glass and the frame, finished with a neat, even bead. We work on conservatory frames, shower screens and glass-to-glass joints, and common reasons people get in touch are rooflight joints letting water in and water running down inside the glass.
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, which is when draughts and damp patches appear in homes in St James's.
Whatever the size of the job, it’s backed by our one-year guarantee.
- Location
- St James's (W1F, W1D, W1J)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
When it is not the sealant
We’d rather tell you now than do work that will not last, so here’s what sealant cannot put right:
- Frames that have decayed or split
- Failed flashing around a conservatory
- Glass that needs replacing
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we’ll tell you honestly.
Joints and surfaces we work on
- Glass balustrade bases
- Rooflights
- Glass-to-glass joints
- Conservatory frames
- Shower screens
- Glass-to-frame joints
Leave it or put it right?
If the problem is a misted unit or a broken panel, sealant won’t help. We will tell you that rather than seal it anyway and point you to a glazier or roofer. In London conversions, one flat’s bathroom is often above another flat’s ceiling, and a slow leak from a failed seal can end up in the flat below. Dealing with it early is far simpler.
Rather than a set price list, we price the job in front of us: the amount of work, the old material and the access. You will know the price before we begin.
Why St James's customers choose us
- Sealant colour chosen to suit
- Domestic, commercial and hotel work
- One-year guarantee on every job
- Neat joints and a tidy finish
Read what affects the cost and our reviews.
How we quote for glazing silicone
Your quote is based on your job. We take into account:
- When we can work, for business premises
- Whether there’s mould to deal with
- How easy the joints are to reach
- The number of rooms or windows
We don’t show prices on the website, because the cost depends so much on the job itself. For a quick quote, please call 0345 464 0079 or drop us an email and we will talk you through it.
What to tell us for a quote
Photos by email are helpful but not essential. Please mention:
- The rough size of the job
- If it’s domestic, commercial or a hotel
- Photos by email, if that’s easy
- What the problem is, such as mould, gaps, leaks or cracking
We do not publish a price list. Instead, your job gets its own clear quote. To arrange one, phone 0345 464 0079 or send us an email.
Surface by surface
Shower screens
A screen’s wall joint and tray joint are where leaks start. Both are resealed with anti-fungal silicone.
Glass-to-glass joints
Where two panes meet, the silicone joint takes all the movement. The bead needs to be tidy and fully bonded.
Landlord and commercial work in St James's
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we’ll give you a quote.
For anyone letting property in or around St James's, jobs at different addresses can be quoted together. Just tell us the addresses and what each one needs, and photos by email help.
What glazing silicone looks like in St James's
With historic houses such as Marlborough House (about 0.3 miles south-west) nearby, there’s older building stock in the area around St James's as well as newer homes. Where a home is older, 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 check that before you book.
For landlords with property near London Charing Cross station, a shower screen or conservatory joint that leaks is easier to reseal while the property is empty. Schools such as Soho Parish CofE Primary School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s. In the older streets around St James’s Church, the joint between an old wall and a newer frame is usually the first place rain gets in.
St James's is about 1 mile south-east of City of Westminster, in Greater London. Anywhere in W1F, our applicators can take on glazing silicone. Our Greater London coverage runs to 764 places, St James's among them.
Our applicators cover all of W1F, W1D and W1J for glazing silicone. Streets in the area include Duck Lane, Bruton Lane and Bridle Lane. Being close to the A4 and A400, St James's is simple for us to get to for glazing silicone. If you’re just outside St James's, we cover Chinatown (1 mile north), Charing Cross (1 mile east), Soho (1 mile north), West End (1 mile north-east) and Burlington Estate (1 mile west). Larger places within reach include Kensington (3 miles west), Shoreditch (3 miles north-east), Walthamstow (7 miles north-east), Hoxton (3 miles north-east), Whitechapel (3 miles east) and Hampstead (4 miles north-west).
What’s near St James's
Typical jobs here are in homes near LITE Regal International School, Tom Cribb pub and London Library and the streets around them. You will also find Harris Westminster Sixth Form (0.6 miles south) and St Anne's Churchyard (less than half a mile north). There’s a railway station in St James's itself: London Charing Cross station. Nearby you’ll also find The Museum of Practical Geology (less than half a mile north-west) and Montfichet's Tower (1.4 miles east). Not far away are St. James's Park Lake and Ludgate Hill.
Places near St James's
Other services in St James's
How the visit works
Before we leave, we go over the finished joints with you. The work normally takes a few hours for most jobs, depending on the size of the job. In a London area like St James's, the main things to plan are parking and access: let us know about parking, the floor we’ll be working on and any lift or shared entrance.
- We find where water is getting in and check whether it’s a sealant joint.
- We cut out the failed silicone, taking care of the glass and frame.
- Surfaces are cleaned with a solvent suited to glass and the frame.
- We apply a neutral-cure glazing silicone and tool it smooth.
- The finished joints are checked and, where it’s safe, tested with water.
Preparing for the visit
- Plan for the work area to be out of bounds to pets and children
- Try not to wet indoor joints just before the visit
- Clear items away from the joints we’re working on
Get a quote
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 photos if that is easy.
Read more
FAQs for St James's
Is parking an issue for glazing silicone in St James's?
In much of London, parking needs planning: a visitor permit or a bay close to the door helps a lot.
Do you work for landlords with property near London Charing Cross station?
Yes. We work for letting agents and landlords as well as householders, and several properties can be quoted together. You can ring 0345 464 0079 or drop us an email with the details for a clear quote.
Which products do you use?
It depends on the joint: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. Brands we use include Arbo and Everbuild.
What guarantee do I get?
Every job comes with our 12-month guarantee.
Is it possible to redo the silicone on a shower screen?
Yes. We cut out the old silicone and reseal the glass-to-wall and glass-to-tray joints.
Will it make a mess?
Very little: the area around the joints is protected first, and we clear up the old sealant and our materials before we leave.
Can a conservatory leak be sealed?
That depends where the water is getting in. Failed glazing and frame joints can be resealed but roof and panel problems need another trade.
Why not top up the existing silicone?
Many leaks we see come from exactly that. A proper job means cutting out, cleaning and resealing.