Hampshire · England
New Build Mastic in Wintershill
New build mastic for Wintershill, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Second-fix sealing on new plots
- Beads laid onto grit and dust from the build
- Worktop and upstand sealant coming away
New build mastic in Wintershill
If your new home has a leaking shower seal, open skirting joints or untidy sealant, we can help. While the builder’s snagging or warranty period runs, report it to them first and if that stalls, we can do it. Typical jobs include cracked caulk along new skirting and kitchen sealant that has pulled off the wall, on kitchens, bathrooms & en suites and skirting & floors.
Around Wintershill, older homes often have timber floors that move through the year, so skirting and threshold joints need a flexible sealant rather than a rigid filler.
You are covered for a year from the day we finish. If there’s a problem with it, please ring 0345 464 0079 or send us an email.
- Where
- Wintershill (SO32)
- Region
- Hampshire
- Guarantee
- One year on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
DIY sealant or a professional job?
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
Wintershill: your questions answered
Will you come out to Wintershill?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Do you work for landlords with property near Hedge End station?
Yes, landlords and agents are among the people we work for. Just ring 0345 464 0079 or email us with the address and what needs doing, and we’ll send you a clear quote.
Where is Mr Mastic based?
Our base is Crawley, with over 20 years’ experience. We work across South East England, London and Scotland.
Is it messy?
Not at all. The area is protected while we work and cleaned up afterwards.
Do you work for developers?
Yes. Plot mastic and second-fix sealing for developers is part of our work. Send us the plot schedule and we will quote.
What colour sealant will you use?
It depends on the joint: white or clear for most sanitary joints, colours for worktops, floors and frames. We will agree it with you first.
Can you reseal over the builder’s sealant?
No. Fresh silicone doesn’t stick to the old layer, so it soon lifts and traps water. The old sealant always comes out first.
Who should fix failed sealant in a new build?
Report it to the builder first while you are covered. If it isn’t resolved, we’ll cut it out and reseal it.
Nearby places to Wintershill
Also in Wintershill
Aftercare tips
Good habits help new joints last longer. Our tips:
- Check bath and shower seals every few months as the house settles
- Record problems with dated pictures
- Avoid running a DIY bead over the old one
- Act quickly if a seal starts to leak
Do not stand on the bath edge or the lip of the tray in the first few weeks. Report any movement in a bath or tray.
Do not let the snagging period run out with sealant problems unreported. After that, putting it right may fall to you.
What the job involves on each surface
Kitchens
As a new house dries, worktops and walls shift a little, which opens gaps along the back. We reseal them with a flexible sealant.
Bathrooms and en suites
En suite showers are a common source of leaks into the room below. Resealing properly keeps water where it belongs.
What we do, step by step
Before we leave, we go over the finished joints with you and explain the cure time. The visit itself usually takes anything from a few hours to several days, depending on the number of plots, depending on the size of the job. For a village or hamlet like Wintershill, the journey is planned in advance: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- We start by agreeing which joints are on the list, from the snagging sheet or plot schedule.
- We cut out every bit of the failed or messy sealant.
- Each joint is cleaned of dust and grit, then primed if required.
- New sealant suited to each joint is applied and tooled neatly.
- We check every joint and tell you how long each needs to cure.
Preparing for the visit
- Let us know if you’ve seen damp or leaks
- Let us know about earlier repairs to the joints
- Tell us about access, such as stairs, a lift or high-level joints
Ask for a quote
To get a quote, call 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. We’ll give you a clear quote before any work starts.
Related advice
When to call us in Wintershill
The first winter with the heating on dries a new home quickly. Skirting, frames and worktops pull away slightly and cracks appear in the sealant.
Any of these means the joints need attention:
- Internal frame sealant that has split
- Second-fix sealing on new plots
- Cracks appearing as a new home settles
- Sealant applied over dusty or wet surfaces
If you’ve bought a new home near Hedge End station, the sealant around baths, showers and frames is worth checking in the first year or two.
What to look for in a quote
- The length of the guarantee
- Who turns up on the day
- Are they insured?
- What happens if the job turns out different
When it is not the sealant
To be straight with you, there are a few things sealant won’t fix:
- Cracked trays, tiles or worktops
- Leaks from pipes, valves or wastes, which need a plumber
- Baths and trays that move too much for sealant to cope with
If in doubt, call 0345 464 0079 or drop us an email and we will say what we think.
What we seal
- Plot handovers
- Windows & doors
- Skirting & floors
- Kitchens
- Bathrooms & en suites
- Show homes
Work for landlords, hotels and businesses
For anyone letting property in or around Wintershill, jobs at different addresses can go on one quote. Just tell us the addresses and what each one needs, and photos by email help.
We also work for property managers and facilities teams in Wintershill and across Hampshire. Several sites can go on one quote, and we are fully insured for the work.
What new build mastic looks like in Wintershill
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.
In and around Wintershill, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Wintershill is about 2 miles west of Bishop's Waltham, in Hampshire. We carry out new build mastic for homes and businesses in Wintershill and the surrounding area. 683 places in Hampshire are on our list. Our Southampton page covers work nearby (7 miles or so).
We cover every part of the SO32 postcode area for new build mastic and the streets around it. If you need new build mastic at a property on Scivier's Lane, Durley Hall Lane and The Crescent or a nearby road, our applicators can take on the job. Close by, we work in Durley Street (1 mile south-east), Lower Upham (1 mile north), Durley (1 mile south), Ashton (2 miles east) and Upham (2 miles north-east). We also work in nearby towns such as Winchester (7 miles north-west), Gosport (12 miles south), Havant (14 miles south-east), Eastleigh (4 miles west), Fareham (8 miles south) and Horndean (11 miles east).
What’s near Wintershill
The nearest railway station is Hedge End station, roughly 2.8 miles south-west of the centre. Well-known places in the area include Moorgreen Hospital (3.9 miles south-west) and Bishop's Waltham Museum (1.7 miles east). Open spaces near Wintershill include Bishops Waltham Branch LNR.