Isle of Wight · England
Glazing & conservatory sealant in Northwood, Isle of Wight
Glazing silicone for conservatories, rooflights, glass panels and shower screens in Northwood, with a 12-month guarantee on every job. Call for a quick quote.
- Water getting into a conservatory at the joints
- Shower screens leaking along the wall or tray
- A quick top-up bead that didn’t last
For landlords and businesses
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
We also work for property managers and facilities teams in Northwood and across the Isle of Wight. We can quote a run of properties together, and we are fully insured.
Glazing silicone for homes and businesses in Northwood
Glass and frames expand and contract differently, and the silicone between them takes the strain. Once it splits or comes away, water finds a way through. We cut it out and reseal with a glazing silicone suited to the joint. If you are dealing with rooflight joints letting water in and drips on the inside of a conservatory window, we can help, whatever the surface.
Around Northwood, 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.
Each job carries a 12-month guarantee.
- Where
- Northwood (PO31)
- Wider area
- Isle of Wight
- Guarantee
- 12 months on all our work
- Quote
- A clear price before work begins
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Surface by surface
Rooflights
Rooflight glazing joints are cut out and renewed. Leaks from the roof itself need a roofer.
Conservatory frames
Leaks often start where the frame meets the wall. We cut out the old sealant and reseal.
What we do, step by step
We bring everything the job needs with us, so there’s nothing for you to buy. Once we have agreed what’s being done, the area is protected and the work begins. It normally takes a few hours, depending on how many joints need doing. Somewhere as small as Northwood, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We trace the leak and confirm it’s a sealant joint.
- We remove the old sealant carefully.
- The joint is cleaned and degreased.
- We lay the new bead and tool it smooth.
- Each joint is checked and, where possible, water-tested.
Preparing for the visit
- Mention if the joints have been sealed before
- Plan for the work area to be out of bounds to pets and children
- Clear the area around the work
Getting a quote
For glazing silicone in Northwood, phone 0345 464 0079 or drop us an email. Tell us what the problem is and where, and we will agree the price before any work begins.
Read more
Common questions in Northwood
Does the coastal weather in Northwood affect outside sealant?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. The right product, a clean joint and the right depth all help it cope.
Can you do glazing silicone in Northwood?
Yes, Northwood is within the area we cover. We work across London and the South East. You can call 0345 464 0079 or drop us an email and let us know what needs doing.
Does someone need to be in?
It depends on the job. For work indoors, someone needs to let us in.
How long does the job take?
It depends on the size of the job, but most jobs take a few hours for most jobs. We will tell you when we quote.
What guarantee do I get?
Every job comes with our 12-month guarantee.
Where is Mr Mastic based?
Our base is Crawley, with over 20 years’ experience. Our area covers South East England, London and Scotland.
What sealant do you use on glazing?
We pick a glazing silicone to suit the materials. Neutral-cure products suit most glass and frames, as some acetoxy types can attack certain metals.
Are you fully insured?
Yes. Mr Mastic is fully insured, with over 20 years’ experience in sealant work.
Places near Northwood
Other services in Northwood
When something else is needed
New sealant cannot fix everything, and we’d rather say so up front. Sealant will not put right:
- Cracked or broken glass
- A sealed unit that has misted inside
- Leaks from the roof covering or flashing (a roofer’s job)
Not sure which it is? You can ring 0345 464 0079 or email us and we will tell you honestly.
Joints and surfaces we work on
- Rooflights
- Glass balustrade bases
- Glass-to-frame joints
- Glass-to-glass joints
- Conservatory frames
- Shower screens
What glazing silicone looks like in Northwood
Northwood is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. Both are hard on glazing joints and frame seals, which can dry out and crack sooner where a building faces the weather. London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you look after a building such as Northwood Primary School, the mastic around its windows and doors needs looking after like any other building’s.
Northwood is about 1 mile south of Cowes, in the Isle of Wight. Every kind of property in Northwood can book us for glazing silicone, old or new, large or small. Every job comes with our 12-month guarantee. Northwood is one of 125 towns and villages in the Isle of Wight we cover for glazing silicone. We also work in Portsmouth, around 11 miles away.
We work across the PO31 postcode area for glazing silicone and the streets around it. If you need glazing silicone at a property on Nodes Road, Wyatts Lane and Uplands Road or anywhere close by, we can help. We also cover the places around Northwood: Rew Street (1 mile west), Gurnard (1 mile north), Cowes (1 mile north), Noke Common (2 miles south) and Parkhurst (2 miles south). Larger places within reach include Newport (3 miles south), Ryde (7 miles east), Sandown (9 miles south-east), Shanklin (10 miles south-east), Ventnor (11 miles south-east) and Oakfield (7 miles east). Island and remote addresses take a little more planning, so please mention your location when you phone 0345 464 0079 or send us an email.
Around Northwood
Around Northwood, our work takes us to homes and buildings near Cowes Enterprise College and The Travellers Joy pub and the streets around them. Nearby you will also find Isle of Wight Natural History Centre (0.5 miles north) and West Cowes Castle (1.7 miles north). For a walk, there’s Mill Hill and Briddlesford Nature Reserve.
Why deal with it now?
Resealing can’t fix a failed unit or a cracked panel. We’ll tell you that rather than seal it anyway, so you can call the right trade. Where a wall is exposed, as many are in small places like Northwood, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs. Ask us for a quote and we’ll go through it with you.
What you get with us
- Trusted Arbo and Everbuild sealants
- Colour picked to suit the job
- One-year guarantee on every job
- Experience in homes, commercial sites and hotels
Take a look at our cost guide or what customers say.
Quotes for glazing silicone in Northwood
There’s no set price list. What we look at:
- Mould in or behind the old joints
- Working hours on commercial sites
- Whether the work is at height
- The number of rooms or windows
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all make a difference, and we’ll explain the quote if you ask.
Asking for a quote
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- How many joints, rooms or windows are involved
- If it’s domestic, commercial or a hotel
- How we’d reach the joints
- What’s wrong with the joints now
For a quote, call 0345 464 0079 or drop us an email with the location and a short description of the problem. You will have a clear quote before work begins.
Common problems we fix in Northwood
Shower screen silicone gets wet every day. Mould gets into it and the joint starts to lift.
The problems people generally mention when they call are:
- Shower screens leaking along the wall or tray
- Glazing silicone that has cracked or come away
- Sealant that was laid over old silicone and failed
- Black or yellowed silicone on glass joints
If you live in an older home near All Saints' Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
What your quote should include
- Who does the work, and how experienced they are
- How the joint is cleaned and prepared
- Whether they’re fully insured
- What the quote includes, VAT included or not