Hampshire · England
New-build mastic & snagging in Ashton, Hampshire
Problem with your new-build sealant joints in Ashton? We remove the old material, prepare the joints and seal them properly.
- Shower seals failing in the first year or two
- Cracked caulk along new skirting
- Beads laid onto grit and dust from the build
About our new build mastic in Ashton
Some owners wait for the first year’s movement before having joints redone. That makes sense for small gaps that are just cosmetic, but a failed shower or bath seal shouldn’t wait. We work on skirting & floors, plot handovers and show homes, and common reasons people get in touch are joints pulling apart as timber shrinks and sealant that never bonded to the surface.
Around Ashton, older homes often have timber floors that move through the year, which is why skirting and threshold joints need a flexible sealant, not filler.
All of our work is guaranteed for twelve months, and the guarantee is the same wherever you are.
- Where
- Ashton (SO32)
- Region
- Hampshire
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
What happens if it’s left?
Small cosmetic gaps can wait for the house to settle, but a leaking seal can’t. If you are unsure which you have, ring 0345 464 0079 or drop us an email with photos. Around Ashton, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
What it costs depends on the amount of work, how hard the old material is to remove and access to the work. You’ll have a clear quote before any work starts.
Why choose Mr Mastic in Ashton
- Anti-fungal silicone where joints get wet
- Old sealant always removed completely
- Sealant colour chosen to suit
- Trusted Arbo and Everbuild sealants
What happens on the day
We work through the job in order: protection first, then preparation, sealing and a tidy-up. Typically it takes a few hours for most snagging lists, longer for a run of plots, and the area is left clean. In a small place like Ashton, access is usually the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- First, the list of joints is agreed from your snagging sheet or plot schedule.
- The failed sealant is removed completely, with no layer left behind.
- We clean out the dust and grit left from the build.
- Primer goes on where the surface and product need it, then the new sealant.
- Each bead is tooled and the cure times explained.
Preparing for the visit
- Clear the area around the work
- For indoor joints, keep the area dry beforehand if you can
- Let us know about stairs, lifts or work at height
Getting a quote
If you are in Ashton and need new build mastic, call 0345 464 0079 or drop us an email. Tell us what the problem is and where, and you will get a clear quote before we start.
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DIY versus a professional finish
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
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.
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements.
Ashton questions
Can you do new build mastic in Ashton?
Yes, Ashton is within the area we cover. Our work covers London and the South East. Just ring 0345 464 0079 or email us with a few details of the job, and we’ll send you a clear quote.
Can you help a landlord with a rental near Botley station?
Yes, we work for letting agents and landlords. You can call 0345 464 0079 or send us an email with the address and a few details, and we’ll give you a fixed price before we start.
Do you work through snagging lists?
Yes. Send us the sealant items on the list, with photos if you can and we’ll give you a quote. We’ll flag anything that needs another trade.
Will there be a smell?
It depends on the product. Some products have a noticeable smell, others very little, and any smell fades as they cure.
How much does new build mastic cost in Ashton?
The cost depends on the size of the job, access and how much old sealant has to come out. Ask us for a quote.
Can new sealant go on top of the old bead?
No. New silicone won’t bond to old silicone, so it soon lifts and traps water. The old sealant always comes out first.
Will it make a mess?
We keep the work tidy. Nearby surfaces are protected.
Can you work on commercial sites?
Yes. Hotels, offices and other businesses use us and we are fully insured.
Also in Ashton
How the job changes by surface
Kitchens
As a new house dries, worktops and walls shift a little, opening gaps behind the upstand. We reseal them with a flexible sealant.
Show homes
In a show home, the sealant is on display. Every bead is neat and coloured to suit the room.
New build mastic in Ashton: local notes
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Around Ashton, as everywhere, new build mastic is only as good as the preparation behind it.
Ashton is about 5 miles north-east of Hedge End, in Hampshire. If you need new build mastic in Ashton, it’s easy to get a quote: please phone 0345 464 0079 or send us an email. We cover Hampshire from our Crawley base, Ashton included. Our area takes in 683 places across Hampshire. There’s also a page for Southampton, about 8 miles away.
We work across the SO32 postcode area for new build mastic and the streets around it. Nearby, we also carry out new build mastic in Upham (1 mile north-west), Bishop's Waltham (1 mile south), Durley Street (1 mile south-west), Lower Upham (1 mile west) and Wintershill (2 miles west). Larger places within reach include Winchester (8 miles north-west), Gosport (12 miles south), Havant (13 miles south-east), Eastleigh (5 miles west), Fareham (8 miles south) and Horndean (10 miles south-east).
Local landmarks in Ashton
In Ashton, that means homes and buildings near Swanmore College of Technology and the streets around them. For rail, the closest station is Botley station, roughly 4 miles south-west. A little further out are Bishop's Waltham Museum (1.1 miles south) and Moorgreen Hospital (5.3 miles south-west). The countryside around Ashton includes Beacon Hill and Bishops Waltham Branch LNR.
Honest limits
Honest advice matters more to us than a booking, so here’s what new sealant will not do:
- Structural cracks in walls or ceilings
- Cracked trays, tiles or worktops
- Plumbing faults behind the sealant
Not sure which it is? You can ring 0345 464 0079 or email us and we’ll tell you honestly before you book.
Surfaces we seal
- Skirting & floors
- Plot handovers
- Show homes
- Bathrooms & en suites
- Kitchens
- Windows & doors
Common problems we fix in Ashton
If plaster or screed was still damp when it was sealed, the bond suffers. On a busy site, joints are not always given time to dry before the sealant goes on.
Keep an eye out for these signs:
- Sealant applied over dusty or wet surfaces
- Messy sealant that spoils new finishes
- Gaps opening as the house dries out and settles
- Gaps between new skirting and floors
For new homes near Botley station, it’s worth checking the sealant early, while snags are still fresh.
What your quote should include
- Which sealant they’ll use, and why
- What happens if they find a problem under the old sealant
- What the quote includes, VAT included or not
- When the joint can take water or movement