Hampshire · England
Sandleheath New Build Mastic
Our applicators work in Sandleheath on plot mastic for developers and snagging failed sealant in new homes. Old sealant removed completely, joints prepared properly.
- Sealant that never bonded to the surface
- Joints pulling apart as timber shrinks
- Frame joints opening as the plaster dries
Joints and finishes in Sandleheath homes
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.
Whether the job is in Sandleheath itself or nearby, the right material for each joint matters as much as a neat finish.
Sandleheath is in Hampshire. Anywhere in SP6, we cover new build mastic for homes and businesses. Across Hampshire, we cover 683 places, and Sandleheath is one of them. Our Southampton page covers work nearby.
Here we cover the SP6 postcode area for new build mastic. You’ll find streets such as Elms Close, Main Road and Old Brickyard Road, and we cover them all. Nearby, we also carry out new build mastic in Ashford (1 mile east), Alderholt (1 mile south), Damerham (1 mile north-west), Rockbourne (2 miles north) and Broxhill (2 miles south-west). Further out, we also cover Totton (14 miles east), Romsey (15 miles east), New Milton (14 miles south-east), Ringwood (6 miles south), Barton on Sea (15 miles south-east) and Ashley (14 miles south-east).
What’s near Sandleheath
Other landmarks nearby include Fordingbridge Museum (1.5 miles east) and Godshill Castle Hill (2.7 miles east). Open spaces near Sandleheath include Blashford Lakes.
About our new build mastic in Sandleheath
Our new-build work comes in two parts: plot mastic for developers, and putting right failed sealant for people who’ve bought a new home. In both, preparation makes the difference. Typical jobs include cracked sealant around new window and door frames and gaps behind new kitchen upstands, across kitchens, bathrooms & en suites and windows & doors.
Older homes in small places like Sandleheath often have timber floors that move with the seasons, so skirting and threshold joints need a flexible sealant rather than a rigid filler.
Big or small, it’s backed by our 12-month guarantee.
- Place
- Sandleheath (SP6)
- Region
- Hampshire
- Guarantee
- 12 months on all our work
- Quotes
- A clear price before work begins
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
What we do, step by step
We keep the work tidy and contained to the joints we are treating, so you can get on with your day. Expect the work to take anything from a few hours to several days, depending on the number of plots, and we tell you how long to leave it before we go. In a small place like Sandleheath, access is normally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- Each joint is checked for movement before we start.
- 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.
- We check every joint and leave you with the cure times.
How to prepare
- Tell us if parking is tricky
- Clear the area around the work
- On commercial sites, let us know about site rules
Ask for a quote
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 email photos if that is easy.
Advice
Sandleheath questions
Will you come out to Sandleheath?
Yes. Sandleheath is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Is there a guarantee on new build mastic in Sandleheath?
Every job comes with our 12-month guarantee, wherever it is. We are also fully insured and ARBOMaster approved.
Do you work for letting agents?
Yes. We work in homes, commercial premises and hotels.
What colour sealant will you use?
White and clear are the most common, but other colours are available. We choose one to suit the room and agree it with you.
How do I get a quote for new build mastic in Sandleheath?
Size, access and the old material all affect the cost. Ask us for a quote and we’ll talk you through it.
Does someone need to be in?
Access is agreed with you when the job is booked. Indoors, that generally means someone at home.
What do you put in the joint?
Quality sealants from brands including Arbo and Everbuild, chosen to suit the joint. We explain the product when we quote.
How long does the job 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.
Landlord and commercial work in Sandleheath
Housing providers, facilities teams and property managers book us too in Sandleheath and across Hampshire. Several sites can go on one quote, and we are fully insured.
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Resealing at the right time is simple maintenance that we can handle for you.
What the job involves on each surface
Windows and doors
The gap between a new frame and its plaster reveal often opens up. We remove cracked sealant and apply a flexible one.
Plot handovers
Developers can send the plot schedule and specification. Sealant work across the plot is covered to the agreed spec.
What affects the cost of new build mastic
Some jobs are bigger than they look, and some smaller. What affects the quote:
- The size of the job
- How much old sealant there is and how hard it is to remove
- How easy the joints are to reach
- When we can work, for business premises
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
To make quoting easier, let us know:
- What’s wrong with the joints now
- The rough size of the job
- A few photos by email, if you can
- The type of property
We quote each job on its own, so start by telling us what you need. Just ring 0345 464 0079 or email us with the details.
Can I do it myself?
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
What we cannot put right
A few problems are outside what sealant work can do:
- Leaking fittings rather than failed sealant
- Disputes or warranty claims with your builder
- Broken tiles or a split tray
Not sure which it is? You can ring 0345 464 0079 or email us and we will tell you honestly before booking.
Surfaces we seal
- Kitchens
- Windows & doors
- Plot handovers
- Skirting & floors
- Show homes
- Bathrooms & en suites
More services for Sandleheath
Do you need new build mastic in Sandleheath?
The first winter with the heating on dries a new home quickly. Gaps open along skirting, frames and worktops and cracked sealant shows up.
People generally contact us after spotting one of these:
- Second-fix sealing on new plots
- Skirting joints opening in the first winter
- Kitchen sealant that has pulled off the wall
- Internal frame sealant that has split
Around Sandleheath, as everywhere, new build mastic is only as good as the preparation behind it.
What your quote should include
- Whether you can choose the colour
- Is VAT in the price?
- How the joint is cleaned and prepared
- What happens if they find a problem under the old sealant