Hampshire · England
New-build mastic & snagging in South Harting, Hampshire
New build mastic for South Harting and the surrounding area: careful preparation, the right product and tidy work. Call for a quick quote.
- Internal frame sealant that has split
- Worktop and upstand sealant coming away
- Gaps between new skirting and floors
South Harting questions
Do you work for landlords with property near Petersfield station?
Yes, rental work is part of what we do. 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.
Can you do new build mastic in South Harting?
Yes. Our work covers London and the South East, and South Harting is part of that. You can call 0345 464 0079 or drop us an email and tell us what needs doing.
Do you remove the old sealant?
Yes. We cut out all the old sealant and clean the joint before applying anything new.
Will there be a smell?
Possibly a little. It fades as the sealant cures, and ventilation helps.
Are you insured?
Yes. We are fully insured for every job we do.
Is it messy?
Not at all. The area is protected while we work and cleaned up afterwards.
Do you guarantee your work?
Yes, for a year. If anything is not right with the work within the year, let us know and we’ll sort it.
How long does the job take?
As a guide, most jobs take anything from a few hours to several days, depending on the number of plots. Bigger jobs take longer.
New build mastic for homes and businesses in South Harting
We work in new homes and on new-build sites across South Harting. Whether it’s one en suite or a run of plots, the method is the same: cut out, clean, prime where needed and reseal neatly. We work on windows & doors, show homes and plot handovers, and people most often call us about kitchen sealant that has pulled off the wall and skirting joints opening in the first winter.
Around South Harting, older homes often have timber floors that move through the year, which is why skirting and threshold joints need a flexible sealant, not filler.
Whatever the size of the job, you get the same one-year guarantee.
- Where
- South Harting (GU31)
- Region
- Hampshire
- Guarantee
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Places near South Harting
Also in South Harting
DIY sealant or a professional job?
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.
Leave it or put it right?
If you’re still in the builder’s snagging or warranty period, ask them to put it right first. If it keeps failing or isn’t dealt with, we can reseal it properly. In a small place like South Harting, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
What it costs depends on the size of the job, how hard the old material is to remove and access to the work. We give a clear quote before work begins.
Why choose Mr Mastic in South Harting
- We agree the colour with you first
- Fully insured
- Approved under the ARBOMaster scheme
- Colour picked to suit the job
Read our cost guide and customer reviews.
What affects the quote in South Harting
The quote reflects the job in front of us. We look at:
- The amount of work
- The type of sealant required
- The old material and how stubborn it is
- How easy the joints are to reach
We don’t show prices on the website, because each job is priced on what it involves. For a quick quote, please ring 0345 464 0079 or drop us an email.
Helping us quote
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- The problem you’ve noticed
- How we’d reach the joints
- Whether it’s a home or a business
- Any previous sealing or DIY work
It all starts with a short chat. Describe the problem, the location and the size of the job, and we will talk you through what we’d do. Whenever you’re ready, call 0345 464 0079 or drop us an email.
What new build mastic looks like in South Harting
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.
For new homes near Petersfield station, it’s worth checking the sealant early, while snags are still fresh. Around South Harting, as everywhere, new build mastic is only as good as the preparation behind it.
South Harting is about 3 miles south-east of Petersfield, in Hampshire. Our applicators cover new build mastic for homeowners, landlords and businesses in South Harting and nearby, as part of our work across Hampshire. South Harting is one of 683 towns and villages in Hampshire we cover for new build mastic. Our Portsmouth page covers work nearby, about 14 miles away.
We cover every part of the GU31 postcode area for new build mastic. If you need new build mastic at a property on The Square, Smithfield and Mill Lane or a nearby road, we can help. Neighbouring places we cover for new build mastic include East Harting (1 mile east), Nyewood (2 miles north-east), Elsted (2 miles east), Compton (3 miles south) and Dumpford (3 miles north-east). Larger places within reach include Havant (9 miles south-west), Horndean (7 miles south-west), Alton (13 miles north), Waterlooville (9 miles south-west), Petersfield (3 miles north-west) and Purbrook (10 miles south-west).
Landmarks near South Harting
Locally, jobs take us to homes and businesses close to The Ship Inn. The nearest railway station is Petersfield station, about 3.7 miles north-west. Other landmarks nearby include Bear Museum (3.3 miles north-west) and Petersfield Community Hospital (3.6 miles north-west). Open spaces near South Harting include Iping and Stedham Commons and Oakham Hill.
How the visit works
You don’t need to clear the whole room or building before we come, only the area right around the joints. We protect the rest, and the work takes a few hours for most snagging lists, longer for a run of plots in most cases. Somewhere like South Harting needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- 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.
- Each area is checked and left with its cure time.
Before we arrive
- For business premises, tell us about site rules or sign-in
- Move anything stored near the joints
- Tell us if parking is tricky
Get a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we’ll explain what’s involved and give you a clear price.
Related advice
For landlords and businesses
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
We work for landlords and letting agents as well as householders. Resealing between tenancies is a simple way to keep a property in good order before the next move-in.
How the job changes by surface
Bathrooms and en suites
New-build bathrooms and en suites are where sealant fails most often. We cut out the failed bead, clean and prime, and reseal with anti-fungal sanitary silicone.
Plot handovers
We work through plots to your schedule, sealing each room ready for handover. Each joint is cleaned and primed where needed so the sealant lasts.
When it is not the sealant
It helps to know what we cannot do too:
- Damaged fittings that need replacing
- Settlement cracks that need a surveyor
- Leaks from pipes, valves or wastes, which need a plumber
If you are not sure, just call 0345 464 0079 or drop us an email and we’ll give you a straight answer before you book.
Surfaces we seal
- Show homes
- Skirting & floors
- Windows & doors
- Bathrooms & en suites
- Plot handovers
- Kitchens