Hampshire · England
New Build Mastic in Test Valley
New build mastic for Test Valley and the surrounding area: careful preparation, the right product and tidy work. Call for a quick quote.
- Gaps behind new kitchen upstands
- Skirting joints opening in the first winter
- New-build shower sealant that has already split
How we quote for new build mastic
We quote each job individually. This is what makes a difference:
- Access and height
- The type of sealant required
- The number of rooms or windows
- Whether there’s mould to deal with
A few things move the cost up or down: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether the work is at height. Your quote takes all of that into account.
Asking for a quote
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- Photos by email, if that’s easy
- Whether it has been sealed before
- The address or postcode of the job
- Access, such as stairs, a lift or height
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is, and add photos by email if you can.
New build mastic in Test Valley
Across Test Valley, we work for both new-home owners and the builders handing those homes over. Whether it’s one en suite or a run of plots, the method is the same: remove, clean, prime where needed, then a neat new bead. We work on bathrooms & en suites, skirting & floors and show homes, and common reasons people get in touch are kitchen sealant that has pulled off the wall and internal frame sealant that has split.
Older homes in small places like Test Valley often have timber floors that move with the seasons, so skirting and threshold joints need a flexible sealant rather than a rigid filler.
The work is covered for a year after we finish. If anything isn’t right with it, phone 0345 464 0079 or send us an email.
- Place
- Test Valley (SP11)
- Region
- Hampshire
- Cover
- One year on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Looking after it afterwards
A little care helps the new joints last. We recommend:
- Record problems with dated photos
- Check bath and shower seals every few months as the house settles
- Don’t wait for the house to settle if water is getting through
- Report sealant problems to your builder during the snagging period
Clean the sealant with a mild detergent and a soft cloth. Avoid abrasive pads and strong solvents.
A seal that splits early is often a sign of movement. Have it resealed, and the tray or bath checked, before it gets worse.
What the job involves on each surface
Plot handovers
Plot mastic is carried out to the developer’s schedule. Each joint is cleaned and primed where needed so the sealant lasts.
Windows and doors
On new builds, external frame sealant can be patchy. It’s resealed with an exterior sealant suited to the frame and wall.
What we do, step by step
All our tools and materials come with us in the van, so you do not need to buy or prepare anything. After a quick look at the joints together, we protect the area and start. Most jobs take a few hours in a single home. Somewhere as small as Test Valley, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First we work through your snagging list or plot schedule with you.
- The old bead comes out in full, with no layer left behind.
- Surfaces are cleaned of building dust and primed where needed.
- 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.
Before we arrive
- Mention any tricky access
- Let us know about earlier repairs to the joints
- On commercial sites, let us know about site rules
Ask for a quote
Need a quote? Please phone 0345 464 0079 or send us an email and tell us about the job. We will explain what we’d do and give you a clear quote before work begins.
Advice
Questions from Test Valley
Is there a guarantee on new build mastic in Test Valley?
All our work, in Test Valley and everywhere else, comes with a 12-month guarantee. We’re fully insured, and an ARBOMaster approved applicator.
Is Test Valley in your area for new build mastic?
Yes. We work across London and the South East, and Test Valley is part of that. You can phone 0345 464 0079 or drop us an email and let us know what needs doing.
Can you quote for more than one area?
Yes. Just list everything you need.
Why has my new-build shower seal failed already?
New homes dry out and move in their first couple of years, and sealant is often applied quickly onto dusty surfaces. Either can make it fail early.
What do you put in the joint?
Each joint gets the product that suits it. Where it moves, gets wet or faces the weather makes a difference.
Are you ARBOMaster approved?
Yes. We are approved under the ARBOMaster scheme, which is run for the Arbo sealant brand.
How long will you be here?
As a guide, most jobs take a few hours for most snagging lists, longer for a run of plots. Larger jobs naturally take longer, and we’ll say how long yours will take.
Do you have insurance?
Yes. Full insurance covers our work.
Signs you need new build mastic in Test Valley
Not every new-build joint gets the right sealant: decorators’ caulk in a wet area, or a stiff sealant where there’s movement. Both fail early.
Signs it’s time to call us include:
- Untidy sealant flagged on a snagging list
- New-build shower sealant that has already split
- Cracks appearing as a new home settles
- Sealant work across a run of new homes
Around Test Valley, as everywhere, new build mastic is only as good as the preparation behind it.
What your quote should include
- How the joint is cleaned and prepared
- Is the old sealant removed completely?
- Which sealant they’ll use, and why
- What guarantee comes with the work
Joints and finishes in Test Valley homes
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 jobs in and around Test Valley, choosing the right material for each joint is as important as a tidy finish.
Test Valley is about 7 miles north of Andover, in Hampshire. We carry out new build mastic for homeowners, landlords and businesses in Test Valley and nearby. Across Hampshire, we cover 683 places, and Test Valley is one of them. Our Reading page covers work nearby (22 miles or so).
We cover every part of SP11 for new build mastic. Neighbouring places we cover for new build mastic include Ashmansworth (1 mile east), Vernham Street (3 miles west), Upper Green (4 miles north), Inkpen Common (5 miles north) and Hell Corner (5 miles north). Within a short drive, we also cover Basingstoke (15 miles east), Andover (7 miles south), Tadley (13 miles east), Popley (15 miles east), Tidworth (11 miles south-west) and Kempshott (13 miles east).
Landmarks near Test Valley
Green spaces nearby include Pilot Hill.
When something else is needed
We won’t take on work that will not last, so these are the limits:
- A tray or bath that isn’t properly supported, until it’s fixed
- Settlement cracks that need a surveyor
- Broken tiles or a split tray
If in doubt, call 0345 464 0079 or send us an email and we will say what we think.
Surfaces we seal
- Skirting & floors
- Plot handovers
- Show homes
- Kitchens
- Windows & doors
- Bathrooms & en suites
Why act early in Test Valley
For developers, getting the sealant right first time saves return visits. Every return visit for a failed seal takes time. Around Test Valley, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
Rather than a set price list, we price the job in front of us: the amount of work, the old material and the access. You’ll know the price before we begin.
Why book with us
- Every job guaranteed for a year
- Arbo and Everbuild products
- 4.9 on Google from 180+ five-star reviews
- White, clear, grey or another colour, product permitting