Hampshire · England
Clayhall New Build Mastic
Professional new build mastic in and around Clayhall, with every bit of old sealant taken out first.
- Internal frame sealant that has split
- Gaps between new skirting and floors
- Sealant work across a run of new homes
How we handle new build mastic in Clayhall
For builders and developers, we work through plots to the schedule you give us. Bathrooms, en suites, kitchens, frames and skirting are sealed ready for handover using the right product for each joint. If you have skirting joints opening in the first winter and messy sealant that spoils new finishes, we can help.
In smaller places like Clayhall, new homes tend to come as small developments or single plots. The sealant around baths, showers, frames and skirtings needs to be right from the start.
Our work is backed for twelve months, in Clayhall and everywhere else we cover.
- Place
- Clayhall (PO12)
- Region
- Hampshire
- Cover
- One year on every job
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Should I try it myself first?
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
What new build mastic looks like in Clayhall
Clayhall is within about 1 mile of the coast. New homes near the sea put their outside mastic to work from day one, so it’s worth checking at snagging. Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you’ve bought a new home near Portsmouth Harbour station, the sealant around baths, showers and frames is worth checking in the first year or two.
Clayhall is about 2 miles south-east of Gosport, in Hampshire. Every kind of property in Clayhall is covered for new build mastic. The work is guaranteed for a year. Our area takes in 683 places across Hampshire, large and small.
We cover every part of PO12 for new build mastic and the streets around it. Local streets include The Lane, Old Road and Fort Road, and we cover them all. Neighbouring places we cover for new build mastic include Haslar (1 mile south-east), Alverstoke (1 mile west), Portsmouth Point (1 mile north-east), Privett (1 mile north-west) and Portsea (2 miles north-east). Within a short drive, we also cover Havant (8 miles north-east), Fareham (6 miles north-west), Horndean (10 miles north-east), Hedge End (12 miles north-west), Waterlooville (8 miles north-east) and Purbrook (7 miles north-east).
Local landmarks in Clayhall
In Clayhall, that means homes and buildings near Bay House School, The Fighting Cocks pub and St Vincent College and the streets around them. The closest station to Clayhall is Portsmouth Harbour station, roughly 1.4 miles north-east. Well-known places in the area include Gosport War Memorial Hospital (1 mile north-west) and Search (0.9 miles north). The countryside around Clayhall includes West of the River Alver.
What the job involves on each surface
Plot handovers
Good preparation at handover saves snagging later. We clean out building dust before sealing and primer used where needed.
Skirting and floors
Where the floor meets a bath panel or kitchen plinth, the joint keeps mop water out. They get a flexible, water-resistant sealant.
How it works
Once we are on site, we check the joints match what you told us. If we find something unexpected, we talk it through with you first. After that, the work takes a few hours for most snagging lists, longer for a run of plots. Parking around Clayhall is usually 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 go through the snagging list or plot schedule and agree the joints to do.
- Failed or untidy sealant is cut out completely.
- Surfaces are cleaned of building dust and primed where needed.
- A sealant chosen for each area goes in and is tooled smooth.
- Finally, each room is checked and you are given the cure time.
Preparing for the visit
- For business premises, tell us about site rules or sign-in
- Tell us about any previous sealing or DIY attempts
- Mention any parking rules near the property
Ask for a quote
If you’re in Clayhall and need new build mastic, call 0345 464 0079 or email us. Tell us what the problem is and where, and you will get a clear quote before we start.
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How we quote for new build mastic
You will get a clear quote before we start. It takes into account:
- The old material and how stubborn it is
- The amount of work
- Mould in or behind the old joints
- Which sealant suits the joint
Instead of a standard rate, we price the job in front of us: the amount of work, the old material and the access. The price is agreed before we begin.
Helping us quote
What to tell us when you ask for a quote:
- The type of property
- The problem you’ve noticed
- Any previous sealing or DIY work
- Access, such as stairs, a lift or height
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we’ll explain how we’d tackle it. Whenever you are ready, ring 0345 464 0079 or send us an email.
Clayhall questions
Do you cover Clayhall for new build mastic?
Yes, Clayhall is within the area we cover. We work across London and the South East. You can phone 0345 464 0079 or send us an email and tell us what needs doing.
Do you cover smaller places like Clayhall?
Yes. Clayhall is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Can I add another job to the visit?
Yes. Just list everything you need and we’ll quote it together.
I’m a tenant. Can you help?
Yes, but check with your landlord or agent first. Landlords are often happy for the work to be arranged.
Can you reseal over the builder’s sealant?
No. We always remove the existing bead, then clean and prime the joint, before resealing.
Do you remove the old sealant?
Yes. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
Can I send you my snagging list?
Yes. Photos of each sealant item help us quote. If something isn’t sealant, we’ll say so.
Do I need to be at home?
Access is agreed with you when the job is booked. Indoors, that usually means someone at home.
Why act early in Clayhall
A quick bead over the top of the old sealant can look fine at first, but it won’t bond to the old layer. Taking it all out and starting again is the only way to get a lasting seal. In a smaller place like Clayhall, wherever a wall is exposed, a failed outside joint is a real source of damp. Inside, a split seal lets water into floors and panels just as it would anywhere.
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs, plus any working-time requirements on site. Ask us for a quote and we will explain what it covers.
Why book with us
- More than 20 years in sealant work
- Arbo and Everbuild products
- Approved under the ARBOMaster scheme
- 4.9 on Google from 180+ five-star reviews
Work for landlords, hotels and businesses
From a single let to a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a one-year guarantee.
In hotels, rooms out of use cost money, so we plan the work room by room. Hotel work is part of what we do, alongside homes and businesses.
Do you need new build mastic in Clayhall?
Sealant applied onto damp surfaces does not bond well. On a busy site, joints aren’t always given time to dry.
Any of these means the joints need attention:
- Shower seals failing in the first year or two
- Joints pulling apart as timber shrinks
- Gaps between new skirting and floors
- Plot mastic for developers ahead of handover
In and around Clayhall, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Comparing quotes
- What the quote includes, VAT included or not
- What guarantee comes with the work
- Whether they’re fully insured
- What product goes in the joint