Greater London · England
Telegraph Hill Glazing Silicone
We cover Telegraph Hill for glazing silicone for conservatories, rooflights, glass panels and shower screens. Old sealant removed completely, joints prepared properly and a one-year guarantee.
- Silicone pulling away from the glass
- Rooflight joints letting water in
- Mouldy sealant around glass panels
Glazing silicone for homes and businesses in Telegraph Hill
Across Telegraph Hill, we reseal glazing joints in homes, offices and hotels. From conservatories to shower screens, it’s the same careful method, with a sealant chosen for the joint. Common call-outs are for water running down inside the glass and black or yellowed silicone on glass joints, on conservatory frames, rooflights and glass-to-glass joints.
Much of London’s older housing was built with timber sash windows, some still in place and some long since replaced. Whatever is in the opening now, the joint between frame and wall is what keeps the weather out.
All our work comes with a 12-month guarantee.
- Where
- Telegraph Hill (SE4, SE15, SE14)
- Region
- Greater London
- Guarantee
- 12 months on all our work
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Aftercare tips
To keep the joints looking good and working properly:
- Don’t use a blade near the sealant
- Act on drips or damp patches early
- Check the silicone on glass every year or so
- Run a squeegee over the glass when you’re done
Don’t use blades or scrapers near the bead when you clean. Stick to a soft cloth.
Do not leave lifting or mouldy silicone on glazing. Once it starts to peel, water gets behind it and the problem grows.
The process
We bring everything the job needs with us. After a quick look at the joints together, we protect the area and start. It normally takes a few hours for most jobs. For a job in Telegraph Hill, 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 find where water is getting in and check whether it’s a sealant joint.
- Old silicone is cut away from the glass and frame without scratching either.
- The glass and frame are cleaned and degreased.
- Glazing silicone suited to the joint is applied and tooled.
- The finished joints are checked and, where it’s safe, tested with water.
How to prepare
- Mention any parking rules near the property
- Where the joints are inside, avoid wetting them before we arrive
- Keep pets and children clear of the area while we work
Ask for a quote
To get a quote, phone 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. We’ll give you a clear quote before any work starts.
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Telegraph Hill homes and the weather
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. In London conversions and blocks, the lease decides who is responsible for the frames, so it’s worth checking before booking.
For an older house near a landmark such as St Catherine's Hatcham, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. Managing a site like Haberdashers' Hatcham College? Then larger buildings have plenty of frames, and the mastic around each one ages. Letting a property close to Brockley station? Then a shower screen or conservatory joint that leaks is easier to reseal while the property is empty.
Telegraph Hill is about 1 mile south-west of New Cross, in Greater London. Whether you’re in the middle of Telegraph Hill or further out, glazing silicone is available for homes and businesses alike, from flats and houses to offices and hotels. Across Greater London, we cover 764 places, Telegraph Hill among them.
Jobs for glazing silicone in SE4, SE15 and SE14 works the same way as everywhere else we cover. You’ll find streets such as Mona Road, Pepys Road and Kitto Road, and we cover them all. If you’re just outside Telegraph Hill, we cover Nunhead (1 mile south-west), New Cross (1 mile north-east), Peckham (1 mile north-west), St Johns (1 mile east) and Brockley (1 mile south-east). Further out, we also cover London (3 miles north-west), City of Westminster (6 miles north-west), Marylebone (6 miles north-west), Kensington (7 miles west), St Pancras (5 miles north-west) and Shoreditch (4 miles north).
Around Telegraph Hill
In Telegraph Hill, that means homes and buildings near Fordham Park and The Brockley Barge pub. There’s a railway station in Telegraph Hill itself: Brockley station. Nearby you’ll also find Southwark Adult Education Institute (0.6 miles north-west) and Lewisham Shopping Centre (1.4 miles east). Open spaces near Telegraph Hill include St. James's Park Lake and New Cross Gate Cutting.
Also in Telegraph Hill
What sealant work cannot fix
New sealant can’t fix everything, and we’d rather say so up front. It will not solve:
- A broken pane or roof panel
- A sealed unit that has misted inside
- A frame that needs repairing or replacing
Not sure which it is? You can ring 0345 464 0079 or email us and we’ll tell you honestly.
Surfaces we seal
- Conservatory frames
- Glass-to-frame joints
- Rooflights
- Shower screens
- Glass balustrade bases
- Glass-to-glass joints
DIY versus a professional finish
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
A careful DIYer can reseal a simple joint, 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.
Telegraph Hill: your questions answered
Is parking an issue for glazing silicone in Telegraph Hill?
Parking in Telegraph Hill, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly, so mention what’s available when you book.
Do you cover Telegraph Hill for glazing silicone?
Yes, Telegraph Hill is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or send us an email and tell us what needs doing, and we will send you a clear quote.
Can I do it myself?
It depends on the job. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.
When is the sealant fully cured?
Different products cure at different speeds, so follow the cure time we give you.
Will there be a smell?
Some sealants have a smell while they cure. Ventilation helps.
Can I choose the sealant colour?
We help you choose a colour that suits. The product needed can limit the range.
Do you guarantee glazing sealant work?
Our 12-month guarantee applies on all our work.
Can you reseal a frameless shower screen?
Yes. We remove the old sealant and reseal the wall and tray joints.
What happens if it’s left?
A leaking joint won’t fix itself. Water can damage frames, walls, flooring and furniture so early action saves a bigger repair. In a London flat, a failed joint rarely stays your problem alone: water from a shower or window joint can reach the flat below, and gaps in fire-stopping matter to everyone in the building.
Rather than a set price list, we look at what your job involves: how many joints, what’s in them now and how we reach them. You’ll know the price before we begin.
Why choose Mr Mastic in Telegraph Hill
- We’re fully insured
- We leave the area clean and tidy
- Anti-fungal silicone where joints get wet
- More than 20 years in sealant work
Read what affects the cost or what customers say.
Landlord and commercial work in Telegraph Hill
Letting agents and landlords in Telegraph Hill can book us as well as householders. Resealing between tenancies 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 quick to put right between tenancies. Several properties can be quoted together.
Quotes for glazing silicone in Telegraph Hill
We do not publish a price list, because no two jobs are the same. The quote depends on:
- When we can work, for business premises
- Whether old sealant or filler has to be cut out
- Whether the work is at height
- The type of sealant required
A few things move the cost up or down: the old material and how easily it comes out, any mould to treat, and whether the work is at height. Your quote takes all of that into account.
What to tell us for a quote
To help us quote quickly, please include:
- Whether it’s a home or a business
- The address or postcode of the job
- Any access issues, like height or stairs
- What the problem is, such as mould, gaps, leaks or cracking
Asking for a quote is easy: let us know the job and the location. A few photos by email make the job easier to understand, and we’ll come back to you with a quote.