Surrey · England
Glazing & conservatory sealant in Bishopsgate, Surrey
Glazing silicone for Bishopsgate and the surrounding area: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Rooflight joints letting water in
- Water tracking down the inner face of the glass
- Sealant that was laid over old silicone and failed
Landlord and commercial work in Bishopsgate
Landlords and letting agents in Bishopsgate can book us as well as householders. Resealing between tenancies keeps a property looking cared for.
From a single let to a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.
About our glazing silicone in Bishopsgate
Glass replacement is not something we do, and misting between panes means a failed sealed unit. What we do is the silicone around the glass, which is where many leaks start. We’re often asked to deal with conservatory leaks at frame and glazing joints and rooflight joints letting water in, on glass balustrade bases, shower screens and rooflights.
In a village or hamlet like Bishopsgate, older cottages and farmhouses often have timber windows set in stone or brick. Not every older frame suits a modern silicone bead, so the sealant has to be chosen to suit the building.
All of our work is guaranteed for twelve months, in Bishopsgate and everywhere else we cover.
- Location
- Bishopsgate (TW20)
- Region
- Surrey
- Guarantee
- One year on every job
- Price
- A clear price before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Questions from Bishopsgate
Can you help a landlord with a rental near Egham station?
Yes. We work for landlords and letting agents as well as homeowners. Just ring 0345 464 0079 or drop us an email with the address and what needs doing, and we’ll give you a clear quote.
Will you come out to Bishopsgate?
Yes. Bishopsgate is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Will you leave 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.
Where is Mr Mastic based?
We’re a Crawley-based firm. Our area covers South East England, London and Scotland.
Do you have insurance?
Yes. We’re fully insured, and we have been doing sealant work for more than 20 years.
Will the old sealant be removed?
Yes. We cut out all the old sealant and clean the joint before resealing.
When is the sealant fully cured?
It depends on the product and the temperature. Before we leave, we will tell you the cure time.
Can I do it myself?
That depends on the joint. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.
Can I do it myself?
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.
A DIY attempt does not rule out a professional job. We cut it out and start again, so just mention it when you contact us.
Looking after it afterwards
How long the joints last depends on use and care. We suggest:
- Run a squeegee over the glass when you’re done
- Avoid scraping close to the bead
- Stick to mild cleaners on glass
- Open vents or windows to let moisture out
Use mild cleaners on and around the silicone. Harsh solvents may damage the bead.
A leaking shower screen may not show at first. Water can soak into the floor or reach the room below long before you see it.
How it works
A visit follows a simple pattern: we look at the joints together, protect the area around them, carry out the job and tidy away. It generally takes anything from an hour or two to most of a day, depending on the size of the job. Somewhere like Bishopsgate needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- First we agree the joints to be done.
- We cut away the failed silicone.
- We clean and prepare the joint.
- New glazing silicone goes in and is finished neatly.
- The joints are checked before we leave.
How to prepare
- Move anything stored near the joints
- Mention any parking rules near the property
- For business premises, tell us about site rules or sign-in
Getting a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we’ll explain what’s involved and send you a clear quote.
Advice
Different surfaces, different methods
Glass-to-frame joints
The sealant must stick to glass and frame alike. We choose a product that suits both.
Rooflights
Rooflights get the full force of the weather. Its sealant ages faster than vertical joints.
How we quote for glazing silicone
Call for a quick quote. The main things that affect it are:
- Any mould that needs treating
- The number and length of the joints
- The number of rooms or windows
- The old material and how stubborn it is
Instead of a standard rate, we look at what your job involves: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
What we need to know
To help us quote quickly, let us know:
- How we’d reach the joints
- If someone has resealed it before
- A few pictures by email, if you can
- Roughly how big the job is
Getting a quote is simple: let us know what needs doing and where. Photos by email help us understand the job, and we will take it from there.
What glazing silicone looks like in Bishopsgate
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. With historic houses such as Frogmore House (about 2.5 miles north) nearby, there’s older building stock in the area around Bishopsgate as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
Letting a property close to Egham station? Then a shower screen or conservatory joint that leaks is easier to reseal while the property is empty. If you live in an older home near Royal Chapel of All Saints, the joint between an old wall and a newer frame is generally the first place rain gets in.
Bishopsgate is about 2 miles north-west of Egham, in Surrey. Jobs in Bishopsgate get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Our area takes in 395 places across Surrey, large and small. For nearby work, see our Reading page.
We cover every part of TW20 for glazing silicone. Glazing silicone is available to properties on Bishopsgate Road, Ridgemead Road and Wick Lane. Close by, we work in Englefield Green (1 mile south-east), Egham Wick (1 mile south), Old Windsor (1 mile north), Wraysbury (2 miles north-east) and Egham (2 miles south-east). Larger places within reach include Guildford (13 miles south), Woking (9 miles south), Camberley (10 miles south-west), Epsom (15 miles south-east), Ewell (15 miles south-east) and Walton-on-Thames (9 miles south-east).
Near you in Bishopsgate
We work in homes and buildings around The Barley Mow Public House, Englefield Green Infant School and Nurseries and Windsor Great Park. For rail, the closest station is Egham station, about 1.8 miles east. Other landmarks nearby include Berkshire Yeomanry Museum (2.4 miles north-west) and Windsor Castle (3.2 miles north). Not far away are St Ann's Hill and Virginia Water Lake.
Signs you need glazing silicone in Bishopsgate
UV light ages silicone, especially on conservatory roofs. Old silicone hardens, cracks and loses its grip on the glass.
The most common problems we see are:
- Glass-to-glass joints that have split
- Mouldy sealant around glass panels
- Leaking glazing joints on a rooflight
- Water running down inside the glass
Schools such as St John's Beaumont School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s.
Comparing quotes
- Whether VAT is included
- When the joint can take water or movement
- Who turns up on the day
- Is the old sealant removed completely?