Windsor and Maidenhead · England
Glazing & conservatory sealant in Cold Harbour, Windsor and Maidenhead
Problem with your glazing joints in Cold Harbour? We cut out the old, prepare the joints and apply the right sealant.
- Water running down inside the glass
- Black or yellowed silicone on glass joints
- Conservatory leaks at frame and glazing joints
When it isn’t the sealant
Before you book, it’s worth knowing the limits too:
- Structural problems with a conservatory roof
- A sealed unit that has misted inside
- Cracked or broken glass
Not sure which it is? You can ring 0345 464 0079 or email us and we’ll tell you honestly.
Surfaces we seal
- Glass balustrade bases
- Glass-to-glass joints
- Shower screens
- Glass-to-frame joints
- Rooflights
- Conservatory frames
Glazing silicone in Cold Harbour, done properly
A frameless shower screen depends on its silicone. The joint down the wall and the one along the tray are common leak points and both get fresh anti-fungal silicone. If you have water getting into a conservatory at the joints and black or yellowed silicone on glass joints, we can put it right, whatever the surface.
Around Cold Harbour, many homes face open ground, so their windows and doors take the full weather. That exposure dries out and cracks the mastic around frames and sills faster.
Our work is backed for twelve months, in Cold Harbour and everywhere else we cover.
- Where
- Cold Harbour (SL6)
- Region
- Windsor and Maidenhead
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Also near Cold Harbour
More services for Cold Harbour
Should I try it myself first?
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Work for landlords, hotels and businesses
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Resealing at the right time is simple maintenance.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
How we quote for glazing silicone
We don’t publish a price list. What we look at:
- Whether there’s mould to deal with
- The product the joint needs
- The size of the job
- The old material and how stubborn it is
Leaving a failed joint usually makes the job bigger, not smaller. If you are unsure, call 0345 464 0079 or drop us an email for an honest opinion and a quote.
What to tell us for a quote
To help us quote quickly, please include:
- How many joints, rooms or windows are involved
- Where the property is
- What’s wrong with the joints now
- Whether it has been sealed before
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is, and add pictures by email if you can.
Cold Harbour: your questions answered
Is Cold Harbour within the area you cover?
Yes, Cold Harbour is covered. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Do you work for landlords with property near Wargrave station?
Yes, we work for landlords and agents. Just call 0345 464 0079 or drop us an email and tell us about the property, and we’ll give you a clear price.
How much does glazing silicone cost in Cold Harbour?
Every job is different, so each one gets its own quote. For a quick quote, ring 0345 464 0079 or email us and let us know what needs doing and where.
Can you match the sealant colour?
Yes. Sealants come in white, clear, grey and other colours, and we’ll agree it with you first.
Can I add another job to the visit?
Yes. Just list everything you need.
Can you reseal a frameless shower screen?
Yes. We cut out the old silicone and reseal the glass-to-wall and glass-to-tray joints.
How long does the job take?
That depends on the amount of work, but most jobs take anything from an hour or two to most of a day, depending on the size of the job. We’ll give you a better idea when we quote.
Is it worth trying it myself?
You can, for simple jobs. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
How the visit works
Our applicators work methodically: protect, prepare, seal, tidy. For most jobs that takes anything from an hour or two to most of a day, depending on the size of the job, and the area is left clean. For a village or hamlet like Cold Harbour, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- We look at the glazing and agree which joints need resealing.
- We cut away the failed silicone.
- The surfaces are cleaned with a suitable solvent.
- New glazing silicone goes in and is finished neatly.
- We inspect the work and test it where we can.
How to prepare
- Tell us about any water getting in
- On commercial sites, let us know about site rules
- Clear the area around the work
Ask for a quote
Need a quote? Please ring 0345 464 0079 or email us with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.
Advice
Leave it or put it right?
A leaking joint will not fix itself. Left, water can mark floors, damage plaster and rot timber, so it pays to deal with it early. In a small place like Cold Harbour, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
What it costs depends on the amount of work, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before any work starts, so you know where you stand.
Why choose Mr Mastic in Cold Harbour
- An ARBOMaster approved applicator
- We are fully insured
- Homes, businesses and hotels
- Anti-fungal silicone where joints get wet
Read our cost guide or what customers say.
Glazing silicone in Cold Harbour: local notes
Historic houses like Harleyford Manor (about 3.3 miles north) are a reminder that the area around Cold Harbour has older buildings as well as new. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic. 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.
If you let a flat or house near Wargrave station, a shower screen or conservatory joint that leaks is easier to reseal while the property is empty. Schools such as Knowl Hill Church of England Primary Academy are buildings too, and the mastic around its windows and doors needs looking after like any other building’s. Homes close to Saint Peter include some older properties, and frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Cold Harbour is about 3 miles west of Maidenhead, in Windsor and Maidenhead. Whether you are in the middle of Cold Harbour or further out, we cover glazing silicone for every kind of property. Our Windsor and Maidenhead coverage runs to 57 places, Cold Harbour among them. You can also see our page for Reading, about 9 miles away.
Postcode districts we cover here for glazing silicone: SL6. If you’re just outside Cold Harbour, we cover Knowl Hill (1 mile north-west), Warren Row (1 mile north-west), Bowsey Hill (2 miles west), Cockpole Green (3 miles north-west) and Wargrave (3 miles west). Within a short drive, we also cover Maidenhead (3 miles east), Windsor (8 miles east), Boyn Hill (3 miles east), North Ascot (8 miles south-east), Cookham (5 miles north-east) and Furze Platt (3 miles north-east).
Local landmarks in Cold Harbour
Typical jobs here are in homes near Cox Green School and The Royal Oak pub, among other places. The closest station to Cold Harbour is Wargrave station, roughly 3.3 miles west of the centre. Other landmarks nearby include St Mark's Hospital (2.8 miles north-east). Not far away are Hurley Chalk Pit and Taplow Lake.
Surface by surface
Shower screens
Most shower screen leaks come from the wall or tray joint. Both are resealed with anti-fungal silicone.
Glass-to-glass joints
Glass-to-glass joints depend entirely on the sealant. It must be clean, neat and well bonded.