Hampshire · England
New-build mastic & snagging in Northney, Hampshire
Specialist new build mastic for Northney: careful preparation, the right product and tidy work. Call for a quick quote.
- Sealant that never bonded to the surface
- Cracked caulk along new skirting
- Gaps opening as the house dries out and settles
Common problems we fix in Northney
If plaster or screed was still damp when it was sealed, the bond suffers. Site programmes don’t always leave time for joints to dry.
Signs it’s time to call us include:
- Untidy sealant flagged on a snagging list
- Beads laid onto grit and dust from the build
- Kitchen sealant that has pulled off the wall
- Cracked sealant around new window and door frames
For new homes near Warblington station, it’s worth checking the sealant early, while snags are still fresh.
Before booking anyone
- How long to leave it before use
- Is the old sealant removed completely?
- The length of the guarantee
- What insurance they hold
New build mastic in Northney, done properly
New homes move as they dry out. Timber shrinks, plaster dries and baths and trays bed down, and sealant applied in a hurry at handover can split. If you’re dealing with sealant that never bonded to the surface and cracked sealant around new window and door frames, we can put it right, whatever the surface.
For a small place like Northney, the journey and access are planned in advance, and the work itself is the same as on any site.
A one-year guarantee comes as standard, so you’re not left on your own once the job is done.
- Place
- Northney (PO11)
- Region
- Hampshire
- Guarantee
- 12 months on all our work
- Quotes
- A clear price before we start
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Joints and finishes in Northney homes
Northney is within about 1 mile of the coast. Plot mastic on new homes near the coast takes more weather than it would inland, so any gaps are best picked up early. Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
In and around Northney, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Northney is about 3 miles south-east of Havant, in Hampshire. From the centre of Northney to the outskirts, we cover new build mastic for every kind of property, from flats and houses to offices and hotels. Our area takes in 683 places across Hampshire.
Work in PO11 works the same way as everywhere else we cover. Streets in the area include Northney Lane, Spinnaker Grange and Northney Road, and we cover them all. Neighbouring places we cover for new build mastic include North Hayling (1 mile south), Warblington (1 mile north), Tye (1 mile south), Stoke (1 mile south-west) and Langstone (1 mile north-west). Within a short drive, we also cover Gosport (8 miles west), Havant (3 miles north-west), Fareham (10 miles west), Horndean (6 miles north), Waterlooville (5 miles north-west) and Petersfield (12 miles north).
Landmarks near Northney
We work in homes and buildings around Eames Farm and The Ship Inn. The nearest railway station is Warblington station, roughly 1.7 miles north. Nearby you’ll also find Havant Museum (1.7 miles north-west) and Havant War Memorial Hospital (2.1 miles north-west). For a walk, there’s Hayling Billy.
Work for landlords, hotels and businesses
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance.
In hotels, rooms out of use cost money, so we plan the work room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
Why act early in Northney
If you’re still in the builder’s snagging or warranty period, ask them to put it right first. If it’s slow, or the same joint keeps failing, a proper reseal from a specialist is the next step. Older cottages and farmhouses around Northney can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
We don’t show prices on the website, because the cost depends so much on the job itself. For a quick quote, please call 0345 464 0079 or drop us an email.
What you get with us
- Any old sealant cut out fully, not covered over
- Anti-fungal silicone where joints get wet
- Sealant colour chosen to suit
- One-year guarantee on every job
Read our cost guide and our reviews.
Quotes for new build mastic in Northney
There’s no set price list. The quote depends on:
- How much old sealant there is and how hard it is to remove
- Access and height
- Mould in or behind the old joints
- The number and length of the joints
Combining jobs into one visit is usually more efficient than separate visits. We’ll give you a clear price for the lot.
Asking for a quote
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- The problem you’ve noticed
- Any previous sealing or DIY work
- The type of property
- How many joints, rooms or windows are involved
Asking for a quote is easy: let us know the job and the location, and roughly how big it is. Photos by email help us understand the job.
When something else is needed
In fairness, some problems need a different trade:
- Settlement cracks that need a surveyor
- Plumbing faults behind the sealant
- Your warranty claim itself, which is between you and the builder
Not sure which it is? You can ring 0345 464 0079 or send us an email and we will tell you honestly.
What we seal
- Show homes
- Skirting & floors
- Kitchens
- Plot handovers
- Windows & doors
- Bathrooms & en suites
Questions from Northney
Is Northney within the area you cover?
Yes. Northney is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Do you cover Northney for new build mastic?
Yes, Northney is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or email us and tell us what needs doing, and we’ll send you a clear quote.
Can you quote for more than one area?
Yes, and it often makes sense. Combining jobs makes good use of the visit, so mention them when you ask for a quote.
Where is Mr Mastic based?
Mr Mastic is based in Crawley. We cover Northney and the rest of Hampshire, along with the rest of our area.
Can you work from my snagging list?
Yes. Send it with photos and we will quote for the sealant items. If something is not sealant, we’ll say so.
Do you take on second-fix sealing for builders?
Yes. We work through plots to your schedule. Tell us the plots and the joints involved for a clear quote.
Are you an approved applicator?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we are part of it.
Why does sealant fail so quickly in new builds?
New homes dry out and move in their first couple of years, and sealant is often rushed onto dusty, unprimed surfaces. Either can make it fail early.
Also near Northney
Other services in Northney
What the job involves on each surface
Skirting and floors
New homes often develop a gap between skirting and floor. We seal it with a flexible sealant that copes with the movement.
Show homes
In a show home, the sealant is on display. Every bead is neat and coloured to suit the room.
What we do, step by step
When we get to you, we check the joints match what you told us. If anything is different, we explain it before carrying on. Most jobs then take a few hours in a single home. For a village or hamlet like Northney, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- Each joint is checked for movement before any work starts.
- Old sealant is cut out and the joints cleaned.
- Joints are dried and primed where the product calls for it.
- Baths are filled with water, then the new sealant is applied.
- We check every joint and leave you with the cure times.
Preparing for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Let us know about earlier repairs to the joints
- Tell us about access, such as stairs, a lift or high-level joints
How to get a quote
We quote each job on its own, so start by telling us what you need. Just ring 0345 464 0079 or send us an email with the details and send photos if you have them.