Isle of Wight · England
Cowes New Build Mastic
New-build sealant joints in Cowes need attention? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Gaps between new skirting and floors
- Sealant applied over dusty or wet surfaces
- Messy sealant that spoils new finishes
Can I do it myself?
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
New build mastic in Cowes
Developers send us the plot schedule and we work through it. Bathrooms, en suites, kitchens, frames and skirting are sealed ready for handover. We work on windows & doors, kitchens and bathrooms & en suites, and people most often call us about second-fix sealing on new plots and gaps behind new kitchen upstands.
Homes around Cowes move a little with the seasons, and skirting and floor joints show it first. Those joints need a flexible sealant, as rigid filler soon cracks out.
We stand behind the work with a 12-month guarantee, so you’re covered after we’ve gone.
- Where
- Cowes (PO31)
- Region
- Isle of Wight
- Cover
- 12 months on all our work
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Why it’s worth doing now in Cowes
Small cosmetic gaps can wait for the house to settle, but water getting through cannot. If you are unsure which you have, ring 0345 464 0079 or drop us an email with photos and we’ll tell you. Around Cowes, failed sealant lets water into hidden places, such as under the floor, behind a panel or into a wall. Left alone, that means rot, damp and a bigger repair.
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.
Why Cowes customers choose us
- Rated 4.9 stars on Google
- Approved under the ARBOMaster scheme
- Neat joints and a tidy finish
- 20+ years of sealant experience
Take a look at how sealant jobs are priced and customer reviews.
Landlords, agents and businesses in Cowes
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. We can quote for more than one property at once.
Questions from Cowes
What guarantee comes with new build mastic in Cowes?
All our work, in Cowes and everywhere else, comes with a 12-month guarantee. We’re also fully insured and ARBOMaster approved.
Do you cover Cowes for new build mastic?
Yes. We work across London and the South East, and Cowes is part of that. You can phone 0345 464 0079 or drop us an email and tell us what needs doing, and we will give you a clear price.
Is it worth resealing while the house is still settling?
It depends on whether water is getting through. A leaking shower or bath seal should be redone right away, but cosmetic gaps can wait for movement to slow.
I rent my home. Can I book you?
Yes, but check with your landlord or agent first. Many landlords are glad to have it sorted.
Should I try DIY first?
Some simple jobs can be done by a careful DIYer. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Do you do commercial work?
Yes. We’ve worked for hotels, offices and other businesses, and we are fully insured.
How long will you be here?
Most jobs take a few hours in a single home. We’ll confirm how long when we quote.
Does someone need to be in?
We need access to the joints, so we’ll agree that with you when we book. Indoors, that usually means someone at home.
New build mastic around Cowes
Cowes is within about 2 miles of the coast. Plot mastic on new homes near the coast takes more weather than it would inland, so it’s worth checking at snagging. 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.
For jobs in and around Cowes, choosing the right material for each joint is as important as a tidy finish. In and around Cowes, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Cowes is about 8 miles south-west of Gosport, in the Isle of Wight. Every kind of property in Cowes is covered for new build mastic, old or new, large or small. Every job comes with our one-year guarantee. Our area takes in 125 places across the Isle of Wight. You can also see our page for Portsmouth, about 11 miles away.
All of PO31 is within our area for new build mastic. You’ll find streets such as Church Road, Market Hill and High Street, and we cover them all. You will find Cowes on the A3020 and B3320, so it’s easy for us to get to. We also cover the places around Cowes: Gurnard (1 mile west), Northwood (1 mile south), Rew Street (1 mile south-west), Noke Common (3 miles south) and Parkhurst (3 miles south). Larger places within reach include Newport (4 miles south), Ryde (7 miles east), Sandown (10 miles south-east), Shanklin (10 miles south-east), Ventnor (12 miles south) and Oakfield (7 miles east). Being one of the Isle of Wight’s larger places, Cowes has every kind of property, from flats to offices. For island and remote addresses, the job takes a little more planning, so let us know when you get in touch.
Around Cowes
Typical jobs here are in homes near The Painters Arms, Isle of Wight Studio School and Cowes Enterprise College, among other places. Other landmarks nearby include Isle of Wight Natural History Centre (0.5 miles south-west) and West Cowes Castle (0.7 miles north). The countryside around Cowes includes Briddlesford Nature Reserve and Mill Hill.
Nearby places to Cowes
More services for Cowes
How it works
There isn’t much for you to do on the day. Point us to the joints and we will get on with it. The work itself takes anything from a few hours to several days, depending on the number of plots. For a job in Cowes, we need access to where the work is and somewhere nearby to park. If the job is outside, mention gates, side access and anything above ground floor.
- We look at why each joint failed, including any movement.
- Old sealant is cut out and the joints cleaned.
- We make sure the joints are dry and prime them if needed.
- Baths are filled with water, then the new sealant is applied.
- We check every joint and leave you with the cure times.
Getting ready for the visit
- Mention if the joints have been sealed before
- Where the joints are inside, avoid wetting them before we arrive
- Mention any parking rules near the property
Get a quote
For a quote, phone 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. You will have a clear quote before work begins.
Read more
Keeping the joints in good condition
Aftercare is simple, and it makes a real difference:
- Avoid running a DIY bead over the old one
- Get a leaking seal dealt with straight away
- Wipe joints with warm soapy water
- Report sealant problems to your builder during the snagging period
Clean the sealant with a mild detergent and a soft cloth. Avoid abrasive pads and strong solvents.
Early snagging is easier snagging. Small faults turn into leaks if left over time.
Surface by surface
Plot handovers
Send us the schedule and any sealant specification and we will quote. Sealant work across the plot is covered to the agreed spec.
Show homes
We seal show-home bathrooms, kitchens and frames ready for viewings. Tell us when the home is open so we can plan around it.
When something else is needed
Before booking, it’s worth knowing the limits too:
- Cracked trays, tiles or worktops
- Cracking that points to a structural problem
- Your warranty claim itself, which is between you and the builder
Not sure which it is? You can ring 0345 464 0079 or email us and we’ll tell you honestly before you book.
What we seal
- Kitchens
- Skirting & floors
- Windows & doors
- Bathrooms & en suites
- Show homes
- Plot handovers