West Sussex · England
New-build mastic & snagging in Upperton, West Sussex
New build mastic across Upperton and nearby, with every bit of old sealant taken out first and a 12-month guarantee.
- Beads laid onto grit and dust from the build
- Messy sealant that spoils new finishes
- Kitchen sealant that has pulled off the wall
What the job involves on each surface
Windows and doors
Draughts around new frames are often a sealant gap. We look at the joints and reseal where needed.
Show homes
We seal show-home bathrooms, kitchens and frames ready for viewings. We will plan around viewing times.
New build mastic for homes and businesses in Upperton
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 since hurried prep is behind a lot of new-build failures. We work on kitchens, skirting & floors and show homes, and the jobs we see most are sealant that never bonded to the surface and leaking shower tray seals in a new home.
Older homes in small places like Upperton often have timber floors that move with the seasons, which is why skirting and threshold joints need a flexible sealant, not filler.
All our work comes with a 12-month guarantee.
- Place
- Upperton (GU28)
- Region
- West Sussex
- Guarantee
- One year on every job
- Quotes
- A clear price before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Upperton: your questions answered
Do you cover smaller places like Upperton?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Is Upperton in your area for new build mastic?
Yes. Our work covers London and the South East, and Upperton is part of that. Just phone 0345 464 0079 or email us with a few details of the job, and we’ll send you a clear quote.
Do you remove the old sealant?
Yes, every time. New sealant will not bond properly to old, so the joint is cleaned back first.
Will you leave a mess?
Very little: the area around the joints is protected first, and we tidy up before we go.
Where is Mr Mastic based?
Our base is in Crawley, and we work across South East England, London and Scotland.
How long does the job take?
As a guide, most jobs take a few hours for most snagging lists, longer for a run of plots. Larger jobs naturally take longer, and we will tell you how long to expect.
Can I do it myself?
It depends on the job. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.
Do you work for letting agents?
Yes, often. Several properties can go on one quote, and between tenancies is a good time for the work.
What new build mastic looks like in Upperton
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For jobs in and around Upperton, choosing the right material for each joint is as important as a tidy finish.
Upperton is about 12 miles north-east of Chichester, in West Sussex. Jobs in Upperton get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. Upperton is one of 371 towns and villages in West Sussex we cover. We also work in Crawley, around 21 miles away.
We cover every part of GU28 for new build mastic and the streets around it. Other places close to Upperton include Tillington (1 mile south-east), Hampers Green (1 mile east), River (1 mile west), Petworth (1 mile south-east) and Rotherbridge (2 miles south). Larger places within reach include Horsham (14 miles east), Bognor Regis (14 miles south), Chichester (12 miles south-west), Littlehampton (14 miles south), Rustington (14 miles south-east) and Storrington (10 miles south-east).
Local landmarks in Upperton
Nearby you will also find Midhurst Community Hospital (4.3 miles west) and Coultershaw Heritage Site (2.2 miles south). The countryside around Upperton includes Graffham Common and Blackdown.
Leave it or put it right?
The builder is generally the first port of call while the snagging or warranty period runs. If it’s slow, or the same joint keeps failing, a proper reseal from a specialist is the next step. In a small place like Upperton, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
Combining jobs into one visit generally makes better use of the time than several visits. We will give you a clear price for the lot.
Why Upperton customers choose us
- An ARBOMaster approved applicator
- White, clear, grey or another colour, product permitting
- Fully insured
- We never seal over old sealant
Towns and villages near Upperton
Other services in Upperton
How the visit works
Most of a good job is in the preparation, so that is where we spend the time. Joints are cleaned back and dried before anything new goes in. In total, it normally takes anything from a few hours to several days, depending on the number of plots. Somewhere as small as Upperton, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- Each joint is checked for movement before work begins.
- We remove the failed sealant and clean the joints.
- We make sure the joints are dry and prime them if needed.
- Baths are filled with water, then the new sealant is applied.
- The finished joints are checked and the cure times given.
Preparing for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Let us know about earlier repairs to the joints
- Clear items away from the joints we’re working on
How to get a quote
Need a quote? Please call 0345 464 0079 or drop us an email and tell us about the job. We will explain what we’d do and send you a clear quote before we start.
Read more
Should I try it myself first?
If you’ve already had a go yourself, that is fine. We cut it out and start again, so just mention it when you contact us.
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Aftercare tips
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Wait for the cure time before using a resealed shower
- Resist patching a failed seal with a tube from the DIY shop
- Raise failed sealant with the developer while you’re covered
- Wipe joints with warm soapy water
Keep the bathroom ventilated, especially in the first year. Use the extractor fan or open a window after showers.
Mould takes hold quickly in sealant that has gaps or lifted edges. Resealing before mould gets in keeps the job straightforward.
Signs you need new build mastic in Upperton
Sealant is often one of the last jobs before handover. Joints aren’t always cleaned of dust or primed, so the bead never bonds properly.
Any of these means the joints need attention:
- Skirting joints opening in the first winter
- Sealant work across a run of new homes
- Frame joints opening as the plaster dries
- Sealant applied over dusty or wet surfaces
In and around Upperton, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Before you book anyone
- How long to leave it before use
- Is VAT in the price?
- What happens if the job turns out different
- What preparation is included
Landlord and commercial work in Upperton
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. Several properties can go on one quote.
Landlords and agents in Upperton can book us as well as householders. Resealing between tenancies is a simple way to keep a property in good order.