Hampshire · England
New-build mastic & snagging in Gosport, Hampshire
Specialist new build mastic for Gosport: careful preparation, the right product and tidy work. Call for a quick quote.
- Sealant work across a run of new homes
- Untidy sealant flagged on a snagging list
- Worktop and upstand sealant coming away
New build mastic in Gosport, done properly
If your new home has a leaking shower seal, open skirting joints or untidy sealant, we can help. While the builder’s snagging or warranty period runs, report it to them first, and if it isn’t put right, get in touch with us. We work on bathrooms & en suites, kitchens and skirting & floors, and common reasons people get in touch are sealant that never bonded to the surface and gaps opening as the house dries out and settles.
Towns like Gosport have older streets and newer estates side by side, with new homes still going up on the edge of many towns. In a newer home, sealant and floor joints are generally among the first things to need attention.
The work is covered for a year after we finish. If there’s a problem with it, please ring 0345 464 0079 or drop us an email.
- Location
- Gosport (PO12, PO13)
- Wider area
- Hampshire
- Cover
- One year on every job
- Quotes
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
For landlords and businesses
If you manage several properties in or around Gosport, jobs at different addresses can be quoted together. Just tell us the addresses and what each one needs, and pictures by email help.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.
Why deal with it now?
Running a new bead over the builder’s sealant might look tidy for a few weeks, but it won’t bond to the old layer. A lasting seal starts with removing the old one completely. Gaps in sealant and mould in the bead never get better on their own, and in a busy household in Gosport they spread with every shower and every downpour. Replacing the sealant now is the simplest fix.
Homes and businesses are quoted the same way: the amount of work, the access and the products needed. Call for a quick quote and we will go through it with you.
Why us?
- Full insurance on every job
- Neat joints and a tidy finish
- A choice of colours where the product allows
- 180+ five-star Google reviews
New build mastic in Gosport: local notes
Gosport is close to the coast. New homes near the sea put their outside mastic to work from day one, so it’s worth checking at snagging. London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
In and around Gosport, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Gosport is in Hampshire. Every kind of property in Gosport can book us for new build mastic. The work is guaranteed for a year. Across Hampshire, we cover 683 places, and Gosport is one of them.
All of PO12 and PO13 is within our area for new build mastic. You’ll find streets such as Station Road, St Johns Square and Cockleshell Square, all of which we cover. Being close to the A32 and B3333, Gosport is simple for us to get to for new build mastic. Neighbouring places we cover for new build mastic include Forton (1 mile south-east), Elson (1 mile north), Priddy's Hard (1 mile east), Bridgemary (1 mile north-west) and Rowner (2 miles north-west). Within a short drive, we also cover Havant (8 miles north-east), Eastleigh (14 miles north-west), Fareham (4 miles north-west), Horndean (9 miles north-east), Hedge End (10 miles north-west) and Waterlooville (8 miles north-east). As one of the bigger places in Hampshire, Gosport has every kind of property, from flats to offices.
Landmarks near Gosport
We work in homes and buildings around St Vincent College, Brune Park Community School and Queen's Head pub. The nearest railway station is Portsmouth Harbour station, about 2 miles east of the centre. Nearby you’ll also find Search (1.3 miles south-east) and Gosport War Memorial Hospital (0.8 miles south). Green spaces nearby include Portsdown Hill and West of the River Alver.
Aftercare tips
To keep the joints looking good and working properly:
- Do not seal over failed sealant yourself
- Watch for new gaps as the house dries out
- Record problems with dated pictures
- Avoid scourers and strong chemicals on sealant
Avoid standing on the rim of the bath or the edge of the tray in the first few weeks. If a bath or tray moves when you stand in it, get it looked at.
Report failed sealant to the builder while you’re in the snagging period. Once it ends, the repair may be down to you so report it promptly.
What affects the quote in Gosport
The price is agreed before any work begins. It takes into account:
- Mould in or behind the old joints
- When we can work, for business premises
- The number and length of the joints
- How easy the joints are to reach
Every job is a little different, 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.
Helping us quote
When you contact us, it’s useful to know:
- Whether it has been sealed before
- If it’s domestic, commercial or a hotel
- Where the job is, and your postcode
- How many joints, rooms or windows are involved
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we’ll talk you through the work and send you a clear quote.
What we are called out for in Gosport
Later trades and the final clean can damage fresh sealant. A bead disturbed before it has cured may never seal properly.
These are the problems we are asked about most:
- Joints pulling apart as timber shrinks
- Cracked sealant around new window and door frames
- Cracked caulk along new skirting
- Gaps behind new kitchen upstands
For new homes near Portsmouth Harbour station, it’s worth checking the sealant early, while snags are still fresh.
Comparing quotes
- Who does the work, and how experienced they are
- Whether the sealant suits the joint
- Whether they seal over old material or remove it
- How the surfaces are prepared before sealing
Gosport questions
Is new build mastic in Gosport guaranteed?
All our work, in Gosport and everywhere else, comes with a 12-month guarantee. We are also fully insured and ARBOMaster approved.
Can you do new build mastic in Gosport?
Yes, Gosport is within the area we cover. Our work covers London and the South East. You can call 0345 464 0079 or send us an email and tell us what needs doing, and we will give you a clear price.
I’m a tenant. Can you help?
Yes. Ask your landlord first, and we can send them the quote if that helps.
Is it normal for sealant to crack in a new home?
Cracking in the first couple of years is common, because the house is drying and settling. Poor preparation at handover adds to it.
Can you do several jobs on one visit?
Yes. Just list everything you need and you’ll get one quote.
Do you have insurance?
Yes, we are fully insured.
Can I send you my snagging list?
Yes. Photos of each sealant item help us quote. If something isn’t sealant, we will say so.
Will you just run a new bead over the existing one?
No. Sealing over old sealant looks fine for a few weeks, then lifts. All the old sealant comes out before we start.
How the visit works
Every visit runs the same way: we look at the joints together, mask and protect the surrounding surfaces, do the work and tidy away. It normally takes anything from a few hours to several days, depending on the number of plots. In Gosport, parking is rarely complicated, though it helps to know about driveways or restrictions, and let us know if the work is upstairs, in a flat or up high outside.
- We go through the snagging list or plot schedule and agree the joints to do.
- The old bead comes out in full, with no layer left behind.
- Each joint is cleaned of dust and grit, then primed if required.
- We apply a sealant that suits each joint and tool it to a neat finish.
- We check every joint and tell you how long each needs to cure.
How to prepare
- Let us know if you’ve seen damp or leaks
- Mention any tricky access
- Plan for the work area to be out of bounds to pets and children
Ask for a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we will explain how we’d tackle it. When it suits you, call 0345 464 0079 or send us an email.
Related advice
Should I try it myself first?
If you’re set on DIY, put the effort into 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.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.