Portsmouth · England
Wymering New Build Mastic
New build mastic for Wymering and the surrounding area: careful preparation, the right product and tidy work. Call for a quick quote.
- Gaps between new skirting and floors
- Second-fix sealing on new plots
- Cracks appearing as a new home settles
Common questions in Wymering
Is Wymering in your area for new build mastic?
Yes, Wymering is within the area we cover. We work across 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.
Can you help a landlord with a rental near Cosham station?
Yes, rental work is part of what we do. Just call 0345 464 0079 or send us an email and tell us about the property, and we’ll give you a clear quote.
What do you put in the joint?
The product depends on the job: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. Brands we use include Arbo and Everbuild.
How long does the job take?
It depends on the size of the job, but most jobs take a few hours in a single home. We will give you a better idea when we quote.
When is the best time to reseal in a new build?
Any seal that’s leaking should be redone right away. For small cosmetic gaps, waiting until the house has settled can save doing them twice.
Do you hold any approvals?
Yes. We are ARBOMaster approved, the scheme for applicators of Arbo sealants.
Is it normal for sealant to crack in a new home?
A new house dries and settles for a year or two, and sealant is often rushed onto dusty, unprimed surfaces. Both lead to early failure.
Can you do plot mastic on a new development?
Yes. We work through plots to your schedule ready for handover. Tell us the plots and the joints involved for a clear quote.
How we handle new build mastic in Wymering
A new house keeps drying out and settling for its first couple of years. Timber dries and shrinks, and baths and trays settle, so sealant that was laid quickly before handover often cracks. We work on kitchens, skirting & floors and bathrooms & en suites, and people most often call us about plot mastic for developers ahead of handover and leaking shower tray seals in a new home.
Where new homes go up in smaller places like Wymering, it’s often a small development or a single plot. The sealant around baths, showers, frames and skirtings needs to be right from the start.
Our work is backed for twelve months, in Wymering and everywhere else we cover.
- Location
- Wymering (PO6, PO2)
- Region
- Portsmouth
- Guarantee
- 12 months on all our work
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Work for landlords, hotels and businesses
Hotels need rooms back in use, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
Housing providers, facilities teams and property managers book us too. We can quote a run of properties together.
Also near Wymering
More services for Wymering
How to look after the new joints
Once the sealant has cured, a few habits help it last:
- Do not wait for the house to settle if water is getting through
- Follow the cure time we give you
- Open a window or run the fan after bathing
- Raise failed sealant with the developer while you are covered
Avoid standing on the rim of the bath or the edge of the tray while the sealant cures. If a bath or tray moves when you stand in it, get it looked at.
If a shower tray or bath seal splits in the first year, look for movement. Getting it resealed properly, and any movement checked, stops it recurring.
Quotes for new build mastic in Wymering
Your quote is based on your job. We look at:
- How many rooms, windows or areas are involved
- How much old sealant there is and how hard it is to remove
- Which sealant suits the joint
- How much there is to do
We do not show prices on the website, because the cost depends so much on the job itself. Call for a quick quote.
Asking for a quote
To make quoting easier, please include:
- Access, such as stairs, a lift or height
- Any previous sealing or DIY work
- How many joints, rooms or windows are involved
- Whether it’s a home or a business
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we will talk you through what we’d do. Whenever you’re ready, phone 0345 464 0079 or drop us an email.
What new build mastic looks like in Wymering
Wymering is close to 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. Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For new homes near Cosham station, it’s worth checking the sealant early, while snags are still fresh.
Wymering is about 3 miles north of Portsmouth, in Portsmouth. We carry out new build mastic for householders, landlords and businesses in Wymering and the surrounding area. Our Portsmouth coverage runs to 19 places, Wymering among them.
We work across the PO6 and PO2 postcode area for new build mastic. We cover properties on Dean Road, Deal Road and Park Lane and the roads around them. Wymering sits on or near the A397, so getting to you is simple. If you are just outside Wymering, we cover Cosham (1 mile south-east), Paulsgrove (1 mile west), Hilsea (1 mile south), Drayton (1 mile east) and Widley (1 mile north-east). Further out, we also cover Portsmouth (3 miles south), Southsea (4 miles south), Milton (4 miles south), Landport (3 miles south), Baffins (3 miles south) and Portsea (4 miles south-west).
Landmarks near Wymering
Locally, jobs take us to homes and businesses close to Springfield School, UTC Portsmouth and Alexandra Park. Wymering has its own railway station: Cosham station. Other landmarks nearby include World War I Remembrance Centre (1.4 miles south-east) and Tricorn Centre (3.1 miles south). Open spaces near Wymering include Portsdown Hill and Southmoor Nature Reserve.
When to call us in Wymering
A new house holds a lot of water from the build, and it dries out over the first couple of years. As it does, timber shrinks and joints open, and sealant that cannot keep up splits.
Look out for any of the following:
- Sealant that never bonded to the surface
- Smeared, uneven beads picked up at snagging
- Frame joints opening as the plaster dries
- Cracks appearing as a new home settles
In and around Wymering, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
What to look for in a quote
- Whether VAT is included
- The length of the guarantee
- Whether the sealant suits the joint
- Whether they’re fully insured
Surface by surface
Kitchens
Worktops in new homes can move slightly as the house dries, which opens gaps along the back. A fresh flexible bead closes them.
Windows and doors
External mastic around new windows and doors is sometimes rushed or missed. We reseal it with a weatherproof, flexible sealant.
Why it’s worth doing now in Wymering
Running a new bead over the builder’s sealant might look tidy for a few weeks, but it will not bond to the old layer. A lasting seal starts with removing the old one completely. Homes in smaller places like Wymering can face more weather, and failed outside joints let damp into walls. Inside, a split seal lets water into floors and panels just as it would anywhere.
Leaving a failed joint generally makes the job bigger, not smaller, 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 and we’ll give you an honest view and a quote.
Why book with us
- We never seal over old sealant
- Trusted Arbo and Everbuild sealants
- ARBOMaster approved applicator
- Experience in homes, commercial sites and hotels
Take a look at our cost guide and our reviews.
How the visit works
A visit follows a simple pattern: we check the joints, mask and protect the surrounding surfaces, do the work and clear up. It generally takes a few hours in a single home. Parking around Wymering is normally easier than in a town centre, but mention any lanes, gates or long drives. If the job is outside, tell us about side access and how high the joints are.
- 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.
- New sealant goes in, with baths filled first so they’re at their heaviest.
- We check every joint and leave you with the cure times.
Getting ready for the visit
- Let us know about parking restrictions
- Clear the area around the work
- For indoor joints, keep the area dry beforehand if you can
Ask for a quote
To get a quote, call 0345 464 0079 or email us and tell us where the job is and what the problem looks like. You’ll have a clear quote before any work starts.