Isle of Wight · England
Bonchurch Window Mastic
Window mastic in Bonchurch from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Whistling draughts around closed windows
- Gaps between the frame and the inside reveal
- Rain getting in at the frame or under the sill
How we handle window mastic in Bonchurch
Around Bonchurch we seal all kinds of frames: from uPVC casements to timber and aluminium, plus patio doors, French doors and sills. The sealant is chosen to suit the frame material and the wall. If you have gaps between the frame and the inside reveal and rushed sealant from a window installation, we can help, whatever the surface.
Somewhere as small as Bonchurch, older homes often have timber frames set in stone or brickwork. Not every older frame suits a modern silicone bead, and sometimes a traditional sand mastic is the better choice.
Our work is backed for twelve months, in Bonchurch and everywhere else we cover.
- Where
- Bonchurch (PO38)
- Wider area
- Isle of Wight
- Cover
- One year on every job
- Quote
- A clear price before work begins
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Why it’s worth doing now in Bonchurch
A cracked joint around a frame lets rain into the wall. Left long enough, it can stain inside walls, spoil plaster and rot wooden frames. Resealing now is a small job by comparison. Older cottages and farmhouses around Bonchurch can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
No two jobs are quite the same, so we quote each one individually. Size, access and the product the joint needs all make a difference, and we’ll explain the quote if you ask.
Why Bonchurch clients choose us
- White, clear, grey or coloured to suit, where the product allows
- We leave the area clean and tidy
- 4.9 on Google from 180+ five-star reviews
- Full insurance on every job
Take a look at how sealant jobs are priced and customer reviews.
Bonchurch: your questions answered
Does the coastal weather in Bonchurch affect outside sealant?
Near the sea, outside joints face more wind, rain and salt than they would inland, so the choice of sealant and the preparation matter even more. Walls facing the sea are normally the first to need attention.
Do you cover smaller places like Bonchurch?
Yes, we do. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
What does window mastic cost?
Every job is different, so each one gets its own quote. To get one, ring 0345 464 0079 or send us an email with a short description of the job.
Do you do commercial work?
Yes. Larger jobs can be planned room by room or area by area to suit the site.
Will resealing my frames help with draughts?
Often, yes. Air often gets in between the frame and the wall, and resealing inside and out closes it.
Can tenants book the work?
Yes, though it’s best to check with your landlord first. Many landlords are glad to have it sorted.
Can you reach windows above the ground floor?
Yes, if safe access is possible. For high or awkward windows, we will tell you what access is needed.
When is the sealant fully cured?
Cure times vary by product. Before we leave, we’ll tell you the cure time.
What window mastic looks like in Bonchurch
Bonchurch is within about 1 mile of 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 the mastic around window and door frames, which can dry out and crack sooner where a building faces the weather. 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 live in an older home near Old St. Boniface Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. If you let a flat or house near Shanklin station, sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Bonchurch is about 2 miles south of Shanklin, in the Isle of Wight. We provide window mastic to homeowners, landlords and businesses in Bonchurch and nearby. Bonchurch is one of 125 towns and villages in the Isle of Wight we cover for window mastic. We also work in Portsmouth, around 15 miles away.
Jobs for window mastic in PO38 works the same way as everywhere else we cover. If you need window mastic at a property on Shore Road, Leeson Road and Bonchurch Village Road or anywhere close by, our applicators can take on the job. We also cover the places around Bonchurch: Luccombe Village (1 mile north), Ventnor (1 mile west), Steephill (2 miles west), Wroxall (2 miles north-west) and Shanklin (2 miles north). Within a short drive, we also cover Newport (9 miles north-west), Ryde (9 miles north), Cowes (12 miles north-west), Sandown (4 miles north), East Cowes (12 miles north-west) and Oakfield (8 miles north). For island and remote addresses, a little more planning is needed, so let us know when you get in touch.
Near you in Bonchurch
Typical jobs here are in homes near Bonchurch Inn. For rail, the closest station is Shanklin station, about 2.4 miles north. A little further out are Sandown Castle (4.3 miles north) and Arthur Webster Memorial Hospital for Children (2.5 miles north). Not far away are Alverstone Mead and St Boniface Down.
What we do, step by step
All our tools and materials come with us in the van, so there’s nothing for you to buy. Once we have agreed what’s being done, we protect the area and start. Most jobs take a few hours for a few frames, or a day or more for a whole house. Somewhere like Bonchurch needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- First we look at every frame and agree the list.
- The old mastic is cut out and the surfaces cleaned back.
- Where gaps are deep, backing rod goes in first.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- Finally we tidy up and check each joint.
How to prepare
- Clear the area around the work
- Let us know about earlier repairs to the joints
- Mention any leaks or damp you’ve noticed
Get a quote
Getting a quote is simple: let us know the job and the location and its rough size. A few pictures by email make the job easier to understand.
Advice
What the job involves on each surface
Timber windows & doors
Wood swells when it’s wet and shrinks when it dries, so a flexible sealant is essential. We seal onto sound, dry paintwork or timber.
Patio & French doors
Water at the foot of a door frame is not always the mastic: blocked drain slots, worn brush seals and threshold details can let water in too. We look for the cause first.
What affects the quote in Bonchurch
Some jobs are bigger than they look, and some smaller. What affects the quote:
- How much old sealant there is and how hard it is to remove
- Any mould that needs treating
- How many areas need sealing
- Access and height
Homes and businesses are quoted the same way: the amount of work, the access and the products needed, along with when we can work on site. Call for a quick quote and we will go through it with you.
Helping us quote
When you call or email, it’s useful to know:
- Access, such as stairs, a lift or height
- What’s wrong with the joints now
- Roughly how big the job is
- Photos by email, if that is easy
We quote each job on its own. Simply ring 0345 464 0079 or email us and describe the job and send photos if you have them.
Should I try it myself first?
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it doesn’t work out, we can still put it right.
When to call us in Bonchurch
Joints that are too thin or too deep fail early. A skim of sealant over a wide gap soon tears, while a joint packed solid can’t stretch. That’s what backing rod is for.
The most common problems we see are:
- Leaking joints at the ends of sills
- Rain getting in at the frame or under the sill
- Cracked internal joints between frame and plaster
- Sealant in the wrong colour for the frame
Schools such as St Catherine's School are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages.
Comparing quotes
- How long the guarantee is
- Whether they’re fully insured
- How much experience the applicator has
- What the quote includes, VAT included or not
How to look after the new joints
No joint lasts for ever, but care makes a real difference. Our tips:
- Wipe condensation off the frames
- Keep drainage slots and sill grooves clear
- Keep solvents and bleach off the sealant
- Keep paint and stain on wooden frames in good order
Silicone cannot generally be painted, so if you are planning to paint the frames or walls, tell us beforehand. There are paintable sealants for joints that need it.
Draughts get worse, not better. As old mastic keeps shrinking, the gap widens, and a cold room gets colder. A new joint closes it up.