Hampshire · England
Glazing & conservatory sealant in Alverstoke, Hampshire
Specialist glazing silicone for Alverstoke: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Silicone pulling away from the glass
- Sealant that was laid over old silicone and failed
- Stained, discoloured glazing silicone
Glazing silicone in Alverstoke
Conservatory leaks often start at a sealant joint, where glass meets frame or frame meets wall. We trace the leak to the joint and reseal it and tell you plainly if the cause is something else. If you have water tracking down the inner face of the glass and glazing silicone that has cracked or come away, we can help, on conservatory frames, rooflights and shower screens alike.
In a village or hamlet like Alverstoke, 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.
We guarantee the work for a year. If something isn’t right with it in that time, tell us and we will put it right.
- Location
- Alverstoke (PO12)
- Region
- Hampshire
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Looking after it afterwards
So the new joints stay in good condition:
- Use gentle products around the joints
- Clear the conservatory gutters regularly
- Squeegee the shower screen after each use
- Open vents or windows to let moisture out
Avoid scraping near the new silicone when you clean. Stick to a soft cloth.
Damp patches, drips and condensation along a joint are worth checking. The cause may be sealant or another part and we will find out which.
How the visit works
On the day, there’s very little for you to do. Show us the job and we’ll take it from there. The work itself takes anything from an hour or two to most of a day, depending on the size of the job, including the tidy-up. Somewhere as small as Alverstoke, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We start by finding the leak and making sure sealant is the cause.
- Old silicone is cut away from the glass and frame without scratching either.
- The glass and frame are cleaned and degreased.
- We apply a neutral-cure glazing silicone and tool it smooth.
- We check the joints and, where safe, run water over them.
Preparing for the visit
- Move anything stored near the joints
- Keep children and pets away from the work area
- Mention any sign-in or site rules at work premises
Get a quote
Every job is quoted individually. Just call 0345 464 0079 or email us with the details.
Related advice
When it isn’t the sealant
In fairness, some problems need a different trade:
- Rotten or badly damaged frames
- A sealed unit that has misted inside
- Leaks from the roof covering or flashing (a roofer’s job)
If in doubt, call 0345 464 0079 or drop us an email and we will say what we think.
Where we work in Alverstoke
- Glass-to-glass joints
- Rooflights
- Glass-to-frame joints
- Shower screens
- Glass balustrade bases
- Conservatory frames
Landlords, agents and businesses in Alverstoke
Hotels need rooms back in use, so the work can be planned room by room around your bookings where we can. We’ve worked in hotels as well as homes and businesses.
From a single let to a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
Questions from Alverstoke
Will you come out to Alverstoke?
Yes, Alverstoke is covered. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Do you work for landlords with property near Portsmouth Harbour station?
Yes, we work for letting agents and landlords. Just call 0345 464 0079 or email us and tell us about the property, and we will send you a clear quote.
Do you reseal glass shower screens?
Yes, it’s a common job. The screen is resealed with anti-fungal silicone suited to bathrooms.
Can you reseal the base of a glass balustrade?
We can. We cut out the failed sealant and reseal the base joint using a sealant that suits the materials.
How long does the job take?
Typically it takes anything from an hour or two to most of a day, depending on the size of the job. Bigger jobs take longer.
Can you replace a misted double-glazed unit?
No. We renew the sealant. Glass and sealed units need a glazier.
What sealant do you use on glazing?
We use a neutral-cure glazing silicone that suits the glass and frame. In bathrooms, we use anti-fungal silicone.
Can I add another job to the visit?
Yes. More than one area can go on one quote.
Why act early in Alverstoke
Fixing a leaking screen early protects what’s underneath. Water from a failed joint can soak into the floor before you notice. Older cottages and farmhouses around Alverstoke can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
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. You’ll know the price before we begin.
Why choose Mr Mastic in Alverstoke
- Old sealant always removed completely
- Fully insured
- Sealant colour chosen to suit
- 180+ five-star Google reviews
What affects the quote in Alverstoke
Every job gets its own quote. These are the things that affect it:
- The number and length of the joints
- Whether there’s mould to deal with
- Which sealant suits the joint
- How easy the joints are to reach
What you pay reflects the work, not a rough estimate. That’s why we ask a few questions first and give you a clear quote before any work starts.
What to tell us for a quote
When you call or email, these details help:
- Roughly how big the job is
- What’s wrong with the joints now
- How we’d reach the joints
- Photos by email, if that is easy
To get a quote, call 0345 464 0079 or email us and tell us where the job is and what the problem looks like. We’ll give you a clear price before any work starts.
What glazing silicone looks like in Alverstoke
Alverstoke is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That’s hard on glazing joints and frame seals, especially on the side facing the sea. The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For landlords with property near Portsmouth Harbour station, leaking glazing joints, shower screens or conservatory seals are worth sorting between tenancies. Schools such as Alverstoke Community Infant School are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages.
Alverstoke is about 2 miles south of Gosport, in Hampshire. Our applicators cover glazing silicone for homes and businesses in Alverstoke and nearby, as part of our work across Hampshire. Alverstoke is one of 683 towns and villages in Hampshire where we work for glazing silicone.
Postcode districts we cover here for glazing silicone: PO12. Glazing silicone is available to properties on The Lane, Fort Road and Church Road. We also cover Clayhall (1 mile east), Haslar (1 mile east), Privett (1 mile north-west), Portsmouth Point (2 miles north-east) and Portsea (2 miles north-east). Further out, we also cover Havant (9 miles north-east), Fareham (5 miles north), Horndean (11 miles north-east), Hedge End (12 miles north-west), Waterlooville (9 miles north-east) and Purbrook (8 miles north-east).
What’s near Alverstoke
Locally, jobs take us to homes and businesses close to Bay House School and Village Home pub, among other places. Alverstoke’s nearest station is Portsmouth Harbour station, roughly 2.1 miles north-east of the centre. Nearby you will also find Tricorn Centre (3 miles north-east) and Gosport War Memorial Hospital (0.9 miles north). The countryside around Alverstoke includes West of the River Alver.
What else we do in Alverstoke
When to call us in Alverstoke
Heat and cold make glass and frames move at different rates. Over years, that movement tears the silicone.
Look out for these signs:
- Water running down inside the glass
- Silicone pulling away from the glass
- New silicone smeared over old sealant
- Cracked silicone between glass panels
If you live in an older home near The Little Church, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Before you book anyone
- Whether the sealant suits the joint
- How the joint is cleaned and prepared
- How long the guarantee is
- Whether you can choose the colour