Hampshire · England
New-build mastic & snagging in Lower Green, Hampshire
Professional new build mastic in and around Lower Green, with every bit of old sealant taken out first and a 12-month guarantee.
- Frame joints opening as the plaster dries
- Plot mastic for developers ahead of handover
- Sealant that never bonded to the surface
About our new build mastic in Lower Green
Some new-home owners let the house settle before resealing. That makes sense for small gaps that are just cosmetic, but a failed shower or bath seal shouldn’t wait. We’re often asked to deal with worktop and upstand sealant coming away and sealant applied over dusty or wet surfaces, across plot handovers, kitchens and bathrooms & en suites.
Somewhere as small as Lower Green, new homes tend to be conversions, self-builds or a few houses rather than an estate. Every one needs its sealant and floor joints done properly, whatever the size of the site.
Every job comes with a one-year guarantee, wherever you are in Hampshire.
- Where
- Lower Green (GU33)
- Wider area
- Hampshire
- Guarantee
- A year, on every job
- Quotes
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Leave it or put it right?
DIY kits don’t solve the main problems with new-build sealant: dust, no primer and old sealant left in the joint. Cutting out, cleaning and priming are what make the difference. Where a wall is exposed, as many are in small places like Lower Green, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
We do not show prices on the website, because the cost depends so much on the job itself. Call for a quick quote.
What you get with us
- Any old sealant cut out fully, not covered over
- You choose the colour before work begins
- Experience in homes, commercial sites and hotels
- Fully insured
Take a look at our cost guide or customer reviews.
Places near Lower Green
More services for Lower Green
Common questions in Lower Green
Do you work for landlords with property near Liss station?
Yes. We work for letting agents and landlords as well as householders. You can ring 0345 464 0079 or email us with the details for a clear quote.
Is Lower Green in your area for new build mastic?
Yes. We work across London and the South East, and Lower Green is part of that. You can ring 0345 464 0079 or drop us an email and let us know what needs doing, and we will give you a clear price.
Do you use white or clear sealant?
White and clear are the most common, but other colours are available. We match the colour to the finish.
Where do you work from?
Mr Mastic is based in Crawley. We cover Lower Green and the rest of Hampshire.
Is there a guarantee?
Yes. Every job comes with our one-year guarantee.
Are you ARBOMaster approved?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we are part of it.
Who should fix failed sealant in a new build?
While the snagging or warranty period runs, the builder should be your first contact. If they’re slow or the fix does not last, we can help.
Can new sealant go on top of the old bead?
No. Fresh silicone does not stick to the old layer, so it soon lifts and traps water. The old sealant always comes out first.
Quotes for new build mastic in Lower Green
For a quick quote, just ask. The main things that affect it are:
- The old material and how stubborn it is
- Whether the work is at height
- Working hours on commercial sites
- How many areas need sealing
Rather than a set price list, we look at what your job involves: the amount of work, the old material and the access. You will know the price before we begin.
What to tell us for a quote
Before you ask for a quote, have a think about:
- Pictures of the joints, sent by email
- Where the job is, and your postcode
- If it’s domestic, commercial or a hotel
- Any previous sealing or DIY work
We quote each job on its own, so start by telling us what you need. Simply phone 0345 464 0079 or send us an email and describe the job and send pictures if you have them.
New homes and floors in Lower Green
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.
If you’ve bought a new home near Liss station, the sealant around baths, showers and frames is worth checking in the first year or two.
Lower Green is about 4 miles north of Petersfield, in Hampshire. Jobs in Lower Green get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. Lower Green is one of 683 places in Hampshire we cover. We also work in Portsmouth, about 19 miles from Lower Green.
Jobs for new build mastic in GU33 works the same way as everywhere else we cover. Nearby, we also carry out new build mastic in Hawkley (1 mile south), Oakshott (1 mile south), Empshott (1 mile north-east), Steep Marsh (2 miles south) and Selborne (3 miles north). Further out, we also cover Havant (14 miles south), Fleet (15 miles north), Horndean (11 miles south), Aldershot (15 miles north-east), Alton (6 miles north) and Waterlooville (13 miles south).
Around Lower Green
We work in homes and buildings around Hawkley Inn, among other places. For rail, the closest station is Liss station, roughly 2.3 miles south-east of the centre. Nearby you will also find The Romany Museum (2.3 miles north) and Petersfield Community Hospital (4.1 miles south). Green spaces nearby include Goleigh Hill and Liss Riverside Railway Walk North.
What we are called out for in Lower Green
When the heating goes on in the first winter, the house dries fast. Gaps open along skirting, frames and worktops and cracks appear in the sealant.
Keep an eye out for these signs:
- Gaps behind new kitchen upstands
- Skirting joints opening in the first winter
- Smeared, uneven beads picked up at snagging
- Gaps opening as the house dries out and settles
In and around Lower Green, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
What your quote should include
- Is VAT in the price?
- How the joint is cleaned and prepared
- Who turns up on the day
- What the cure time is
Looking after it afterwards
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Get a leaking seal dealt with straight away
- Resist patching a failed seal with a tube from the DIY shop
- Clean sealant with mild detergent, not abrasives
- Follow the cure time we give you
Ventilation matters in a new home, which is still drying out. Use the extractor fan or open a window after showers to help keep mould away.
Early snagging is easier snagging. Small faults turn into leaks if left in a busy bathroom.
What we do, step by step
Once we’re 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 for most snagging lists, longer for a run of plots. In a small place like Lower Green, access is generally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First we work through your snagging list or plot schedule with you.
- The old bead comes out in full, with no layer left behind.
- Surfaces are cleaned of building dust and primed where needed.
- New sealant suited to each joint is applied and tooled neatly.
- We check every joint and tell you how long each needs to cure.
Preparing for the visit
- Move anything stored near the joints
- For business premises, tell us about site rules or sign-in
- Keep children and pets away from the work area
Getting a quote
Asking for a quote is easy: let us know the job and the location and its rough size. Photos by email help us understand the job, and we’ll take it from there.
Related advice
DIY versus a professional finish
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.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
When it is not the sealant
We’ll always be straight with you, so here’s what sealant cannot fix:
- Movement caused by a poorly fitted tray or bath
- Deciding who is responsible under a builder’s warranty
- Leaks from pipes, valves or wastes, which need a plumber
Not sure which it is? You can phone 0345 464 0079 or send us an email and we’ll tell you honestly before booking.
What we seal
- Bathrooms & en suites
- Windows & doors
- Show homes
- Plot handovers
- Skirting & floors
- Kitchens