West Berkshire · England
New Build Mastic in Hermitage
Plot mastic for developers and snagging failed sealant in new homes for Hermitage, backed by a 12-month guarantee. Call for a quick quote.
- Shower seals failing in the first year or two
- Beads laid onto grit and dust from the build
- Untidy sealant flagged on a snagging list
How we handle new build mastic in Hermitage
For builders and developers, we work through plots to the schedule you give us. Bathrooms, en suites, kitchens, frames and skirting are sealed ready for handover. We work on bathrooms & en suites, plot handovers and show homes, and common reasons people get in touch are kitchen sealant that has pulled off the wall and plot mastic for developers ahead of handover.
Older homes in small places like Hermitage often have timber floors that move with the seasons, so skirting and threshold joints need a flexible sealant rather than a rigid filler.
You’re covered for a year from the day we finish. If there’s a problem with it, please ring 0345 464 0079 or email us.
- Where
- Hermitage (RG18)
- Region
- West Berkshire
- Cover
- One year on every job
- Quote
- A clear price before we start
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Looking after it afterwards
A little care helps the new joints last. We recommend:
- Do not seal over failed sealant yourself
- Record problems with dated pictures
- Avoid scourers and strong chemicals on sealant
- Open a window or run the fan after bathing
Do not stand on the bath edge or the lip of the tray while the sealant cures. If a bath or tray moves when you stand in it, get it looked at.
Lifting sealant traps moisture and mould behind it. Dealing with it before it goes black keeps the job straightforward.
Different surfaces, different methods
Kitchens
Sink joints are wet all the time. A kitchen sealant goes in there, food-safe where it’s needed.
Show homes
Bathrooms, kitchens and frames in show homes are sealed or resealed to a neat finish ready for viewings. We’ll plan around viewing times.
New build mastic around Hermitage
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
In and around Hermitage, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Hermitage is about 4 miles north of Thatcham, in West Berkshire. Wherever you are in the RG18 postcode area, we can carry out new build mastic at your property. Hermitage is one of 155 places in West Berkshire where we work for new build mastic. Reading is on our list too, about 13 miles from Hermitage.
Postcode districts we cover here for new build mastic: RG18. We cover properties on Newbury Road, Lipscomb Close and Marlston Road. Neighbouring places we cover for new build mastic include Longlane (1 mile south-west), Little Hungerford (1 mile north-east), Oare (1 mile north), Wellhouse (1 mile east) and Curridge (1 mile south-west). Larger places within reach include Newbury (4 miles south-west), Thatcham (4 miles south), Burghfield Common (10 miles east), Speenhamland (4 miles south-west), Hungerford (11 miles west) and Spencers Wood (14 miles east).
Near you in Hermitage
Around Hermitage, our work takes us to homes and buildings near The White Horse pub. The closest station to Hermitage is Newbury Racecourse station, about 4 miles south. A little further out are Hampstead Norris Castle (2.4 miles north-east) and West Berkshire Community Hospital (3.3 miles south). The countryside around Hermitage includes Snelsmore Common.
What we do, step by step
All our tools and materials come with us in the van. Once we’ve agreed what’s being done, we protect the area and start. Most jobs take a few hours in a single home. Somewhere as small as Hermitage, access is often the only tricky part. 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.
- We tool every joint neatly and tell you when each area can be used.
How to prepare
- Tell us about any water getting in
- On commercial sites, let us know about site rules
- Tell us about any previous sealing or DIY attempts
How to get a quote
To get a quote, call 0345 464 0079 or email us and tell us where the job is and what the problem looks like. You’ll have a clear quote before any work starts.
Read more
When to call us in Hermitage
Fresh sealant can be knocked or cut by trades finishing off. A bead disturbed before it has cured may never seal properly and it shows once the home is in use.
People generally contact us after spotting something like this:
- Plot mastic for developers ahead of handover
- Worktop and upstand sealant coming away
- Cracks appearing as a new home settles
- Cracked sealant around new window and door frames
If you’ve bought a new home near Newbury Racecourse station, the sealant around baths, showers and frames is worth checking in the first year or two.
Questions to ask before you book
- How long the guarantee is
- How much experience the applicator has
- Whether VAT is included
- Whether all the old sealant comes out first
Your questions about new build mastic in Hermitage
Can you help a landlord with a rental near Newbury Racecourse station?
Yes, landlords and agents are among the people we work for. You can ring 0345 464 0079 or email us with the details for a clear quote.
Can you do new build mastic in Hermitage?
Yes, Hermitage is within the area we cover. We work across London and the South East. You can phone 0345 464 0079 or email us and let us know what needs doing, and we’ll send you a clear quote.
Do you remove the old sealant?
Always. Sealing over old sealant is the main reason resealing fails early, and it’s something we never do.
Are you ARBOMaster approved?
Yes. We hold ARBOMaster approved applicator status, and we are fully insured.
Where is Mr Mastic based?
We’re based in Crawley, West Sussex, and we work across South East England, London and Scotland.
Can you do plot mastic on a new development?
Yes. Plot mastic and second-fix sealing for developers is part of our work. Send us the plot schedule and we will quote.
Can you work from my snagging list?
Yes. Send us the sealant items on the list, with pictures if you can and we will give you a quote. We will flag anything that needs another trade.
Can you reseal over the builder’s sealant?
No. New silicone will not bond to old silicone, so sealing over the top fails quickly. The old sealant always comes out first.
Other services in Hermitage
DIY sealant or a professional job?
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
A DIY attempt doesn’t rule out a professional job. We cut it out and start again, so tell us about it when you ask for a quote.
Why deal with it now?
A failed shower or bath seal in a new home lets water into floors and walls that are still drying out. Dealing with it early keeps the damage away from ceilings, floors and finishes. Around Hermitage, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
Rather than a set price list, we price the job in front of us: the amount of work, the old material and the access. You’ll know the price before we begin.
Why book with us
- You choose the colour before work begins
- Old sealant always removed completely
- We’re fully insured
- Tidy, careful work
Read what affects the cost or what customers say.
Landlords, agents and businesses in Hermitage
We work for letting agents and landlords as well as homeowners. Sealant work between tenants is a simple way to keep a property in good order.
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 be quoted together.