Hampshire · England
New Build Mastic in Nether Wallop
Professional new build mastic in and around Nether Wallop, with old sealant always removed completely and a 12-month guarantee.
- Plot mastic for developers ahead of handover
- Sealant applied over dusty or wet surfaces
- Shower seals failing in the first year or two
New build mastic in Nether Wallop, done properly
Snagging sealant properly means taking the failed bead out completely. Fresh silicone can’t bond to the old layer, so it all comes out before we clean, dry and reseal. Common call-outs are for sealant that never bonded to the surface and joints pulling apart as timber shrinks, on windows & doors, show homes and plot handovers.
Work in a small place like Nether Wallop just needs the journey and access planning, and the work itself is the same as on any site.
You get a 12-month guarantee, the same in Nether Wallop as everywhere else we work.
- Location
- Nether Wallop (SO20)
- Wider area
- Hampshire
- Guarantee
- 12 months on all our work
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Should I try it myself first?
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
New homes and floors in Nether Wallop
London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
In and around Nether Wallop, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint. If you’ve bought a new home near Grateley station, the sealant around baths, showers and frames is worth checking in the first year or two.
Nether Wallop is about 7 miles south-west of Andover, in Hampshire. Homes, rented property, offices and hotels in Nether Wallop is covered for new build mastic. Every job comes with our 12-month guarantee. We cover 683 towns and villages across Hampshire, from the larger towns to small villages. You can also see our page for Southampton, about 16 miles away.
Jobs for new build mastic in SO20 works the same way as everywhere else we cover. Whether your property is on Church Road, High Street and Church Hill or a nearby road, we can help. If you are just outside Nether Wallop, we cover Middle Wallop (1 mile north-west), Over Wallop (2 miles north-west), Kentsboro (2 miles north), Red Rice (4 miles north-east) and Fox (4 miles north). We also work in nearby towns such as Winchester (12 miles south-east), Eastleigh (15 miles south-east), Andover (7 miles north-east), Totton (15 miles south), Chandler's Ford (13 miles south-east) and Romsey (10 miles south).
Local landmarks in Nether Wallop
In Nether Wallop, that means homes and buildings near The Old Butchers Arms, among other places. For rail, the closest station is Grateley station, about 3.8 miles north-west of the centre. Not far away are Boscombe Down East.
How we quote for new build mastic
The quote reflects the job in front of us. We look at:
- How many areas need sealing
- Whether there’s mould to deal with
- Any working-time requirements on site
- The type of sealant required
Rather than a set price list, 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.
What we need to know
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- If someone has resealed it before
- The type of property
- Where the property is
- Any access issues, like height or stairs
Need a quote? Please phone 0345 464 0079 or email us and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
Also near Nether Wallop
Other services in Nether Wallop
Surface by surface
Bathrooms and en suites
En suite showers are a common source of leaks into the room below. Resealing properly keeps water where it belongs.
Skirting and floors
Wet-area floor joints need a flexible seal. They get a flexible, water-resistant sealant.
What we can’t put right
Sealant is not the answer to every problem, and we will tell you before any work starts. It won’t solve:
- Cracking that points to a structural problem
- Plumbing faults behind the sealant
- A tray or bath that isn’t properly supported, until it’s fixed
Not sure which it is? You can phone 0345 464 0079 or send us an email and we’ll tell you honestly.
What we seal
- Windows & doors
- Skirting & floors
- Bathrooms & en suites
- Show homes
- Kitchens
- Plot handovers
Why act early in Nether Wallop
DIY kits do not solve the main problems with new-build sealant: grit, unprimed surfaces and old layers underneath. Cutting out, cleaning and priming are what make the difference. Around Nether Wallop, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
There are no prices on our website, because the cost depends so much on the job itself. Call for a quick quote.
Why us?
- A 12-month guarantee on all work
- Approved under the ARBOMaster scheme
- A sealant colour to suit the surroundings
- Rated 4.9 stars on Google
Read what affects the cost or customer reviews.
What we do, step by step
A visit follows a simple pattern: we check the joints, protect the area around them, carry out the job and tidy away. Most jobs take a few hours for most snagging lists, longer for a run of plots. Somewhere as small as Nether Wallop, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- Each joint is checked for movement before any work starts.
- We remove the failed sealant and clean the joints.
- Joints are dried and primed where the product calls for it.
- 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.
Before we arrive
- Mention any leaks or damp you’ve noticed
- Where the joints are inside, avoid wetting them before we arrive
- Clear items away from the joints we’re working on
How to get a quote
It all starts with a short chat. Describe the problem, the location and the size of the job. Whenever you are ready, call 0345 464 0079 or email us.
Read more
Nether Wallop questions
I let a flat near Grateley station. Can you help?
Yes, we work for letting agents and landlords. You can phone 0345 464 0079 or send us an email with the address and a few details, and we’ll give you a fixed price before work begins.
Is Nether Wallop in your area for new build mastic?
Yes. We work across London and the South East, and Nether Wallop is part of that. Just phone 0345 464 0079 or email us with a few details of the job, and we’ll send you a clear quote.
Do you take on second-fix sealing for builders?
Yes. We take on second-fix sealant work across new plots. Good preparation keeps snagging to a minimum.
Do you guarantee your work?
Yes. All our work carries our one-year guarantee.
What does new build mastic cost?
We don’t publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. You will get a clear quote before any work starts.
Who should fix failed sealant in a new build?
Start with the builder if you are in the snagging or warranty period. Once that is done, or if they will not put it right, we can reseal it properly.
Can you match the sealant colour to my new kitchen or bathroom?
The colour is chosen to suit the tiles, worktop or frame. Let us know your preference when you ask for a quote.
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, and we will explain our choice.
Landlord and commercial work in Nether Wallop
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
Hotels need rooms back in use, 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.