Hampshire · England
New-build mastic & snagging in Longstock, Hampshire
Plot mastic for developers and snagging failed sealant in new homes for homeowners, landlords and businesses in Longstock. Fully insured, ARBOMaster approved and guaranteed for a year.
- Skirting joints opening in the first winter
- Internal frame sealant that has split
- Cracks appearing as a new home settles
How we handle new build mastic in Longstock
Dust is the enemy of new-build sealant. Each joint is cleaned of dust and primed where the product calls for it, so the new bead bonds properly instead of bonding to the dust. If you have cracks appearing as a new home settles and sealant applied over dusty or wet surfaces, we can help, whatever the surface.
Around Longstock, older homes often have timber floors that move through the year, which is why skirting and threshold joints need a flexible sealant, not filler.
You get a 12-month guarantee, the same in Longstock as everywhere else we work.
- Place
- Longstock (SO20)
- Wider area
- Hampshire
- Guarantee
- One year on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
What new build mastic looks like in Longstock
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 Longstock, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Longstock is about 5 miles south of Andover, in Hampshire. Across the SO20 area, our applicators can take on new build mastic. 683 places in Hampshire are on our list, from the larger towns to small villages. There’s also a page for Southampton, roughly 15 miles from Longstock.
Work in SO20 is quoted and booked the same way as anywhere else. Other places close to Longstock include Leckford (1 mile east), Stockbridge (1 mile south), Fullerton (2 miles north-east), Cottonworth (2 miles north-east) and Chilbolton (3 miles north-east). We also work in nearby towns such as Winchester (9 miles south-east), Eastleigh (13 miles south-east), Andover (5 miles north), Totton (15 miles south), Chandler's Ford (11 miles south-east) and Romsey (10 miles south).
Near you in Longstock
In Longstock, that means homes and buildings near Longstock Park and The Peat Spade Public House and the streets around them. A little further out are Andover War Memorial Hospital (5.8 miles north). For a walk, there’s Mill Lake.
What the job involves on each surface
Bathrooms and en suites
Baths, showers, basins and trays in new bathrooms are the most common new-build reseal. We cut out the failed bead, clean and prime, and reseal with anti-fungal sanitary silicone.
Plot handovers
Taking time over preparation reduces return visits. Dust from the build is removed first and prime where the product needs it.
How it works
Once we are on site, we check the joints match what you told us. If anything is different, we explain it before carrying on. Most jobs then take a few hours in a single home. Somewhere as small as Longstock, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We look at why each joint failed, including any movement.
- We remove the failed sealant and clean the joints.
- 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.
Getting ready for the visit
- Plan for the work area to be out of bounds to pets and children
- Let us know about earlier repairs to the joints
- Mention any sign-in or site rules at work premises
Get a quote
Want a quote for new build mastic? Please call 0345 464 0079 or send us an email and tell us about the job. We’ll explain what we’d do and give you a clear price before any work starts.
Related advice
Work for landlords, hotels and businesses
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
In hotels, rooms out of use cost money, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
Questions from Longstock
Can you do new build mastic in Longstock?
Yes. We work across London and the South East, and Longstock is part of that. You can ring 0345 464 0079 or drop us an email and let us know what needs doing, and we’ll give you a clear price.
Is there a guarantee on new build mastic in Longstock?
Every job comes with our one-year guarantee, wherever it is. We’re fully insured, and an ARBOMaster approved applicator.
Do you work for hotels and businesses?
Yes. Commercial and hotel work is a large part of what we do, as well as homes. Working times can be discussed when we quote.
How long before the joint can be used?
Most sealants are touch-dry well before they’re fully cured. We’ll give you the cure time for the product we used.
Do you work through snagging lists?
Yes. Send the list and a few photos of the sealant items, and we’ll quote. We will tell you if anything on it isn’t a sealant job.
What should I tell you?
A short description and the location, with pictures by email if possible. If we need more, we will ask.
How much does new build mastic cost in Longstock?
We do not publish prices, because the cost depends on the job: its size, the old material, access and the product needed. We agree the price before any work begins.
Are you fully insured?
Yes. We are fully insured for domestic and commercial work.
Also near Longstock
What else we do in Longstock
What happens if it’s left?
Running a new bead over the builder’s sealant might look tidy for a few weeks, but it can’t bond to what’s underneath. Taking it all out and starting again is the only way to get a lasting seal. Around Longstock, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
Leaving a failed joint generally makes the job bigger, not smaller, as water and mould keep getting in. If you’re not sure whether it needs doing, ring 0345 464 0079 or send us an email for an honest opinion and a quote.
Why Longstock clients choose us
- Every job guaranteed for a year
- We never seal over old sealant
- We are fully insured
- Tidy, careful work
Take a look at our cost guide or what customers say.
Aftercare tips
Simple care keeps the joints in good condition. Our advice:
- Record problems with dated photos
- Follow the cure time we give you
- Use the extractor fan every time you shower
- Watch for new gaps as the house dries out
Keep the bathroom ventilated, especially in the first year. Use the extractor fan or open a window after showers.
A seal that splits early is often a sign of movement. Getting it resealed properly, and any movement checked, stops it recurring.
Signs you need new build mastic in Longstock
Sealant is often one of the last jobs before handover. Dusty, unprimed joints are common, so the bead never bonds properly.
These are the problems we are asked about most:
- New-build shower sealant that has already split
- Smeared, uneven beads picked up at snagging
- Worktop and upstand sealant coming away
- Sealant applied over dusty or wet surfaces
Whether the job is in Longstock itself or nearby, the right material for each joint matters as much as a neat finish.
What your quote should include
- Who turns up on the day
- Whether you can choose the colour
- What preparation is included
- How long to leave it before use
What affects the quote in Longstock
Call for a quick quote. The main things that affect it are:
- How many rooms, windows or areas are involved
- Working hours on commercial sites
- The product the joint needs
- Mould in or behind the old joints
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs, along with when we can work on site. Ask us for a quote and we will explain what it covers.
Helping us quote
What to tell us when you ask for a quote:
- Any access issues, like height or stairs
- What’s wrong with the joints now
- Any previous sealing or DIY work
- The rough size of the job
There’s no standard price list, as no two jobs are quite the same. Instead, we give you a clear quote for your job. To arrange one, ring 0345 464 0079 or drop us an email.