Hampshire · England
New Build Mastic in Exton
Plot mastic for developers and snagging failed sealant in new homes for Exton, backed by a 12-month guarantee. Ask us for a quote.
- Messy sealant that spoils new finishes
- New-build shower sealant that has already split
- Second-fix sealing on new plots
New build mastic for homes and businesses in Exton
Across Exton, we work for both new-home owners and the builders handing those homes over. 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. If you have sealant work across a run of new homes and gaps between new skirting and floors, we can put it right.
For a small place like Exton, the journey and access are planned in advance, and once on site, the job is the same as anywhere.
You get a 12-month guarantee, the same in Exton as everywhere else we work.
- Place
- Exton (SO32)
- Region
- Hampshire
- Guarantee
- One year on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Exton: your questions answered
Is new build mastic in Exton guaranteed?
Every job comes with our one-year guarantee, wherever it is. We are also fully insured and ARBOMaster approved.
Is Exton within the area you cover?
Yes, we do. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Can new sealant go on top of the old bead?
No. New silicone will not bond to old silicone, so sealing over the top fails quickly. We cut the old bead out completely.
Do you work for letting agents?
Yes, we do. Domestic, commercial and hotel work are all part of what we do, and we are fully insured.
What does new build mastic cost?
There’s no set price, as it depends on the job: how much there is, what’s there now, how we reach it and what it needs. You’ll get a clear quote before we start.
Do you remove the old sealant?
Yes. All of the old material is cut out and the joint cleaned before applying anything new.
Is it messy?
No. The area is protected while we work and cleaned up afterwards.
Do I have to be there?
For indoor joints, yes, someone needs to let us in. After that, you can carry on with your day.
Places near Exton
What else we do in Exton
When something else is needed
We will always be straight with you, so here’s what sealant can’t fix:
- Your warranty claim itself, which is between you and the builder
- Damaged fittings that need replacing
- Leaking fittings rather than failed sealant
If in doubt, ring 0345 464 0079 or send us an email and we will say what we think.
Where we work in Exton
- Plot handovers
- Windows & doors
- Skirting & floors
- Bathrooms & en suites
- Kitchens
- Show homes
How to look after the new joints
Good habits help new joints last longer. A few tips:
- Keep pictures and emails about snagging items
- Wipe joints with warm soapy water
- Open a window or run the fan after bathing
- Follow the cure time we give you
Watch the joints as the house settles. Small gaps can appear as the house dries, and they’re simple to reseal once movement has slowed.
If a shower tray or bath seal splits in the first year, look for movement. Have it resealed, and the tray or bath checked, before it gets worse.
How the visit works
Good joint work is mostly preparation, and we do not rush it. Joints are cleaned back and dried before anything new goes in. All told, the work takes a few hours in a single home. For a village or hamlet like Exton, 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 going through the snagging items or plot schedule with you.
- The failed sealant is removed completely, with no layer left behind.
- We clean out the dust and grit left from the build.
- We prime where needed and apply a sealant suited to each joint.
- Each bead is tooled and the cure times explained.
Getting ready for the visit
- Tell us about any previous sealing or DIY attempts
- Try not to wet indoor joints just before the visit
- On commercial sites, let us know about site rules
Ask for a quote
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 email us.
Advice
What new build mastic looks like in Exton
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Around Exton, as everywhere, new build mastic is only as good as the preparation behind it.
Exton is about 7 miles north-west of Horndean, in Hampshire. Jobs in Exton get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. Exton is one of 683 towns and villages in Hampshire where we work for new build mastic. For nearby work, see our Southampton page (12 miles or so).
Every address in SO32 is covered for new build mastic. You’ll find streets such as Shoe Lane, Church Lane and Beacon Hill Lane, all of which we cover. We also cover Corhampton (1 mile south), Meonstoke (1 mile south), Brockbridge (1 mile south), Droxford (2 miles south) and Soberton (3 miles south). Further out, we also cover Winchester (10 miles north-west), Gosport (12 miles south), Havant (10 miles south-east), Eastleigh (10 miles west), Fareham (10 miles south) and Horndean (7 miles south-east).
Local landmarks in Exton
In Exton, that means homes and buildings near The Shoe Inn. Open spaces near Exton include St Clair's Meadow and Beacon Hill.
How the job changes by surface
Bathrooms and en suites
En suite showers are a common source of leaks into the room below. A proper reseal keeps water in the tray.
Show homes
We seal show-home bathrooms, kitchens and frames. Tell us when the home is open so we can plan around it.
What happens if it’s left?
Sealant done properly at handover means fewer callbacks. Snagging visits for failed sealant cost time on every plot, and they’re avoidable with good preparation. Where a wall is exposed, as many are in small places like Exton, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Every job is a little different, so we quote each one individually. Size, access and the product the joint needs all play a part, and we’ll explain the quote if you ask.
Why us?
- More than 20 years in sealant work
- Arbo and Everbuild products
- Homes, businesses and hotels
- We’re fully insured
See our cost guide or customer reviews.
Should I try it myself first?
If you are set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions.
What we’re called out for in Exton
Later trades and the final clean can damage fresh sealant. A bead disturbed before it has cured may never seal properly.
The problems people generally mention when they call include:
- Skirting joints opening in the first winter
- Cracked sealant around new window and door frames
- Leaking shower tray seals in a new home
- Second-fix sealing on new plots
Whether the job is in Exton itself or nearby, the right material for each joint matters as much as a neat finish.
Questions to ask before booking
- What guarantee comes with the work
- What product goes in the joint
- How long to leave it before use
- Are they insured?