Southampton · England
New-build mastic & snagging in Itchen, Southampton
Plot mastic for developers and snagging failed sealant in new homes for homeowners, landlords and businesses in Itchen. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Sealant work across a run of new homes
- Untidy sealant flagged on a snagging list
- Beads laid onto grit and dust from the build
How we handle new build mastic in Itchen
Developers send us the plot schedule and we work through it. We seal bathrooms, kitchens, windows, doors and skirting so plots are ready to hand over using the right product for each joint. Typical jobs include cracked sealant around new window and door frames and skirting joints opening in the first winter, across plot handovers, show homes and skirting & floors.
For a new home in or near Itchen, it’s worth checking the sealant early. Gaps at skirtings, shower seals pulling away and missing mastic around frames are common snags.
Whatever the size of the job, it’s backed by our one-year guarantee.
- Location
- Itchen (SO19, SO14)
- Region
- Southampton
- Guarantee
- 12 months on all our work
- Price
- A clear price before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
How the visit works
When we get to you, we check the joints match what you told us. If anything is different, we explain it before carrying on. After that, the work takes anything from a few hours to several days, depending on the number of plots. A visit to Itchen is planned like any other: the time, the access and where to park are agreed in advance. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- First, the list of joints is agreed from your snagging sheet or plot schedule.
- The failed sealant is removed completely, with no layer left behind.
- We clean out the dust and grit left from the build.
- Primer goes on where the surface and product need it, then the new sealant.
- We tool every joint neatly and tell you when each area can be used.
Before we arrive
- Let us know if you’ve seen damp or leaks
- Mention any sign-in or site rules at work premises
- Move anything stored near the joints
How to get a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints.
Read more
Can I do it myself?
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
If you’ve already had a go yourself, that’s fine. We cut it out and start again, so just mention it when you contact us.
Looking after it afterwards
Good habits help new joints last longer. Our tips:
- Wipe joints with warm soapy water
- Watch for new gaps as the house dries out
- Raise failed sealant with the developer while you’re covered
- Use the extractor fan every time you shower
Wipe the sealant with warm soapy water. Keep scourers and harsh chemicals off it, which can damage the surface.
A seal that splits early is often a sign of movement. Getting it resealed properly, and any movement checked, stops it recurring.
How the job changes by surface
Plot handovers
Taking time over preparation reduces return visits. We clean out building dust before sealing and prime where the product needs it.
Skirting and floors
Wet-area floor joints need a flexible seal. We seal them with a sealant suited to wet areas.
Places near Itchen
Other services in Itchen
Quotes for new build mastic in Itchen
For a quick quote, just ask. The main things that affect it are:
- How easy the joints are to reach
- The number of rooms or windows
- Any working-time requirements on site
- The number and length of the joints
What you pay reflects the work, not guesswork. That’s why we ask a few questions first and give you a clear quote before any work starts.
Asking for a quote
What to tell us when you ask for a quote:
- A few photos by email, if you can
- What’s wrong with the joints now
- Where the property is
- If it’s domestic, commercial or a hotel
Every job is quoted individually, so the first step is telling us about yours. Just ring 0345 464 0079 or send us an email with the details, and photos are welcome.
What new build mastic looks like in Itchen
Itchen is close to the coast. New homes near the sea put their outside mastic to work from day one, so any gaps are best picked up early. 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 new homes near Woolston station, it’s worth checking the sealant early, while snags are still fresh. Around Itchen, as everywhere, new build mastic is only as good as the preparation behind it.
Itchen is about 2 miles south-east of Southampton, in Southampton. Homes, rented property, offices and hotels in Itchen can book us for new build mastic, old or new, large or small. The work is guaranteed for a year. Our Southampton coverage runs to 40 places, and Itchen is one of them.
Here we cover the SO19 and SO14 postcode area for new build mastic. Whether your property is on Sea Road, Oak Road and West Road or anywhere close by, our applicators can take on the job. With the A3025 close by, Itchen is easy for our applicators to reach. If you are just outside Itchen, we cover Peartree Green (1 mile north-west), Northam (1 mile north-west), Sholing (1 mile east), Bitterne (1 mile north-east) and St Mary's (1 mile west). Within a short drive, we also cover Shirley (3 miles north-west), Regents Park (3 miles west), Maybush (4 miles north-west), Coxford (4 miles north-west), Freemantle (3 miles west) and Lordswood (4 miles north-west). As one of the bigger places in Southampton, Itchen has every kind of property, from flats to offices.
Landmarks near Itchen
In Itchen, that means homes and buildings near Houndwell Park, Woolston School and Oasis Academy Sholing, among other places. Itchen has its own railway station: Woolston station. A little further out are Bitterne Local History Society Heritage And Research Centre (0.9 miles north) and Marlands Shopping Centre (1.6 miles west). For a walk, there’s Netley Common.
Questions from Itchen
Can you help a landlord with a rental near Woolston station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can call 0345 464 0079 or send us an email with the details for a clear quote.
Do you cover Itchen for new build mastic?
Yes, Itchen is within the area we cover. Our work covers London and the South East. Just ring 0345 464 0079 or send us an email with a few details of the job.
What does new build mastic cost?
It depends on the job, so we quote each one individually. To get one, phone 0345 464 0079 or drop us an email and tell us what needs doing and where.
Why has my new-build shower seal failed already?
Cracking in the first couple of years is common. Poor preparation at handover adds to it.
Does someone need to be in?
It depends on the job. For work indoors, someone needs to let us in, while outside work can sometimes be arranged differently.
How long does new build mastic take?
It depends on the size of the job, but most jobs take anything from a few hours to several days, depending on the number of plots. We’ll give you a better idea when we quote.
Do you work for developers?
Yes. Second-fix sealing in bathrooms, kitchens, frames and floors is part of what we do. Good preparation keeps snagging to a minimum.
Is there any odour?
Some sealants have a smell while they cure. Opening a window helps.
For landlords and businesses
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
We work for letting agents and landlords as well as homeowners. Sealant work between tenants is a simple way to keep a property in good order before the next move-in.
Leave it or put it right?
If you are still in the builder’s snagging or warranty period, ask them to put it right first. If it keeps failing or is not dealt with, we can reseal it properly. Homes in smaller places like Itchen can face more weather, and failed outside joints let damp into walls. Indoors, a failed seal lets water into floors and panels as it would anywhere.
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you’re not sure whether it needs doing, call 0345 464 0079 or drop us an email for an honest opinion and a quote.
Why choose Mr Mastic in Itchen
- Arbo and Everbuild products
- We’re fully insured
- Neat joints and a tidy finish
- We agree the colour with you first
Take a look at how sealant jobs are priced or customer reviews.