Hampshire · England
New Build Mastic in Up Somborne
Plot mastic for developers and snagging failed sealant in new homes for Up Somborne, backed by a one-year guarantee. Call for a quick quote.
- Gaps between new skirting and floors
- Sealant work across a run of new homes
- Gaps opening as the house dries out and settles
New build mastic for homes and businesses in Up Somborne
Some new-home owners let the house settle before resealing. That makes sense for small gaps that are just cosmetic, but a seal that’s letting water through needs doing now. Common call-outs are for untidy sealant flagged on a snagging list and cracked sealant around new window and door frames, on kitchens, windows & doors and skirting & floors.
In a village or hamlet like Up Somborne, new homes are more likely to be a barn conversion or a handful of houses than a big estate. Every one needs its sealant and floor joints done properly, whatever the size of the site.
Each job carries a 12-month guarantee, large or small.
- Place
- Up Somborne (SO20)
- Region
- Hampshire
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
What happens on the day
On the day, there’s very little for you to do. Show us the job and we’ll take it from there. The job generally takes a few hours for most snagging lists, longer for a run of plots from start to finish. In a small place like Up Somborne, access is usually the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- 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.
- The finished joints are checked and the cure times given.
Preparing for the visit
- Mention any parking rules near the property
- Try not to wet indoor joints just before the visit
- 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 the first step is telling us about yours. Simply call 0345 464 0079 or email us and describe the job, and pictures are welcome.
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Honest limits
We’d rather tell you now than do work that won’t last, so these are the limits:
- Movement caused by a poorly fitted tray or bath
- Damaged fittings that need replacing
- Leaking fittings rather than failed sealant
If you’re not sure, just phone 0345 464 0079 or send us an email and we will give you a straight answer.
Surfaces we seal
- Bathrooms & en suites
- Skirting & floors
- Show homes
- Plot handovers
- Kitchens
- Windows & doors
Signs you need new build mastic in Up Somborne
If plaster or screed was still damp when it was sealed, the bond suffers. On a busy site, joints aren’t always given time to dry before the sealant goes on.
The problems people usually mention when they call are:
- Cracked caulk along new skirting
- Sealant applied over dusty or wet surfaces
- Cracks appearing as a new home settles
- Sealant work across a run of new homes
Whether the job is in Up Somborne itself or nearby, the right material for each joint matters as much as a neat finish.
Comparing quotes
- When the joint can take water or movement
- How hidden problems are handled
- What product goes in the joint
- What preparation is included
Questions from Up Somborne
Can you do new build mastic in Up Somborne?
Yes. We work across London and the South East, and Up Somborne is part of that. Just phone 0345 464 0079 or send us an email with a few details of the job.
Is there a guarantee on new build mastic in Up Somborne?
Every job comes with our 12-month guarantee, wherever it is. We’re fully insured, and an ARBOMaster approved applicator.
Should I wait before resealing?
For failed seals that let water through, the best time is now. Cosmetic gaps can wait until the first year or two of movement has passed.
How long should I leave it?
Different products cure at different speeds, so follow the cure time we give you.
Do I need to be at home?
We need access to the joints, so we will agree that with you when we book. Indoors, that generally means someone at home.
Do you work for letting agents?
Yes. We work for householders, landlords, letting agents, businesses and hotels across Hampshire.
Which products do you use?
Quality sealants from brands including Arbo and Everbuild, chosen to suit the joint. We explain the product when we quote.
How long does new build mastic take?
A typical job takes anything from a few hours to several days, depending on the number of plots, including the preparation. Your quote will say how long we expect yours to take.
Nearby places to Up Somborne
What else we do in Up Somborne
Keeping the joints in good condition
A little care helps the new joints last. Our advice:
- Get a leaking seal dealt with straight away
- Raise failed sealant with the developer while you are covered
- Do not seal over failed sealant yourself
- Check bath and shower seals every few months as the house settles
Avoid standing on the rim of the bath or the edge of the tray in the first few weeks. Report any movement in a bath or tray.
Lifting sealant traps moisture and mould behind it. Resealing before mould gets in saves a harder job later.
What affects the cost of new build mastic
Every job gets its own quote. These are the things that affect it:
- The product the joint needs
- How many areas need sealing
- Working hours on commercial sites
- The number and length of the joints
What it costs depends on the size of the job, how hard the old material is to remove and how easy the joints are to reach. You will have a clear quote before any work starts.
What to tell us for a quote
To help us quote quickly, please include:
- Any previous sealing or DIY work
- A few photos by email, if you can
- The problem you’ve noticed
- How we’d reach the joints
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is. Whenever you’re ready, phone 0345 464 0079 or email us.
Different surfaces, different methods
Show homes
Show homes need sealant that looks right from day one. Every bead is neat and coloured to suit the room.
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.
What new build mastic looks like in Up Somborne
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 Up Somborne, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Up Somborne is about 5 miles north-west of Winchester, in Hampshire. Every kind of property in Up Somborne can book us for new build mastic, old or new, large or small. The work is guaranteed for a year. 683 places in Hampshire are on our list, from the larger towns to small villages. We also work in Southampton, about 12 miles from Up Somborne.
We cover every part of SO20 for new build mastic and the streets around it. Streets in the area include Court Lane and Up Somborne Lane. We also cover the places around Up Somborne: Little Somborne (1 mile west), Ashley (1 mile south-west), King's Somborne (2 miles south-west), Lower Slackstead (4 miles south) and Braishfield (5 miles south). We also work in nearby towns such as Winchester (5 miles south-east), Eastleigh (9 miles south-east), Andover (9 miles north), Totton (12 miles south), Chandler's Ford (8 miles south) and Hedge End (13 miles south-east).
Near you in Up Somborne
A little further out are Royal Hampshire County Hospital (4.9 miles south-east).
Landlords, agents and businesses in Up Somborne
From a single let to a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. We can quote for more than one property at once.