West Berkshire · England
Shaw New Build Mastic
New build mastic across Shaw and nearby, with every bit of old sealant taken out first and a 12-month guarantee.
- Internal frame sealant that has split
- Cracks appearing as a new home settles
- Sealant that never bonded to the surface
How it works
On the day, we look over the joints with you first. We protect the surfaces around the joints before work begins. The work generally takes anything from a few hours to several days, depending on the number of plots. A visit to Shaw is planned like any other: the time, the access and where to park are agreed in advance. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- First, the list of joints is agreed from your snagging sheet or plot schedule.
- Every bit of the old builder’s sealant is cut out, with no layer left behind.
- Joints are vacuumed and cleaned of building dust.
- 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.
Before we arrive
- Move anything stored near the joints
- Let us know about stairs, lifts or work at height
- Keep pets and children clear of the area while we work
Ask for a quote
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we will talk you through what we’d do. Whenever you are ready, phone 0345 464 0079 or email us.
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New build mastic for homes and businesses in Shaw
We carry out plot mastic and second-fix sealing for builders, and snagging reseals for new-home owners. In both, preparation makes the difference, because that’s what rushed new-build sealant generally lacks. We work on skirting & floors, windows & doors and bathrooms & en suites, and people most often call us about beads laid onto grit and dust from the build and plot mastic for developers ahead of handover.
Where new homes go up in smaller places like Shaw, it’s often a small development or a single plot. Each still needs its sealant and floor joints finished properly from day one.
Whatever the size of the job, you get the same 12-month guarantee.
- Location
- Shaw (RG14, RG18)
- Region
- West Berkshire
- Cover
- One year on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Leave it or put it right?
Running a new bead over the builder’s sealant might look tidy for a few weeks, but it won’t bond to the old layer. Taking it all out and starting again is the only way to get a lasting seal. Homes in smaller places like Shaw can face more weather, and failed outside joints let damp into walls. Indoors, a failed seal lets water into floors and panels as it would anywhere.
Rather than a set price list, we price the job in front of us: the amount of work, the old material and the access. The price is agreed before we begin.
Why choose Mr Mastic in Shaw
- We leave the area clean and tidy
- Over 20 years’ experience
- We are fully insured
- White, clear, grey or another colour, product permitting
Take a look at what affects the cost or our reviews.
Different surfaces, different methods
Plot handovers
We work through plots to your schedule, sealing each room ready for handover. Each joint is cleaned and primed where needed.
Skirting and floors
As timber and screed dry, skirting and floors shift. We use a flexible product rather than caulk in a colour to suit.
New build mastic in Shaw: local notes
London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Around Shaw, as everywhere, new build mastic is only as good as the preparation behind it. 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.
Shaw is about 1 mile north-east of Newbury, in West Berkshire. Every kind of property in Shaw can book us for new build mastic. The work is guaranteed for a year. Our area takes in 155 places across West Berkshire. Our Reading page covers work nearby, about 15 miles away.
Every address in RG14 and RG18 is within our area for new build mastic, from the main roads to the quietest streets. New build mastic is available to properties on Park Lane, Shaw Road and Kiln Road. Main roads around Shaw include the A4. Other places close to Shaw include Speenhamland (1 mile west), Donnington (1 mile north-west), Speen (1 mile west), Bagnor (2 miles west) and Stockcross (3 miles west). We also work in nearby towns such as Burghfield Common (11 miles east), Hungerford (9 miles west), Spencers Wood (15 miles east), Calcot (12 miles east), Lambourn (12 miles north-west) and Burghfield Hill (11 miles east). Shaw is among the bigger towns we cover in West Berkshire.
Near you in Shaw
Typical jobs here are in homes near Victoria Park, Trinity School and Trinity School. The closest station to Shaw is Newbury Racecourse station, about 0.8 miles south-east of the centre. Nearby you’ll also find Donnington Castle (1.3 miles north-west) and West Berkshire Community Hospital (1 mile east). Green spaces nearby include Audrey's Meadow.
DIY sealant or a professional job?
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
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.
How to look after the new joints
Aftercare is simple, and it makes a real difference:
- Keep pictures and emails about snagging items
- Look at the sealant regularly in the first couple of years
- Ventilate bathrooms well, especially in the first year
- Avoid scourers and strong chemicals on sealant
Avoid standing on the rim of the bath or the edge of the tray in the first few weeks. If a bath or tray moves when you stand in it, get it looked at.
Early snagging is easier snagging. Left alone, a small crack can become a leak in a busy bathroom.
Common questions in Shaw
Do you cover Shaw for new build mastic?
Yes. We work across London and the South East, and Shaw is part of that. You can ring 0345 464 0079 or email us and tell us what needs doing.
Will you come out to Shaw?
Yes, we do. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Can tenants book the work?
Yes, but check with your landlord or agent first. Landlords are often happy for the work to be arranged.
Can I do it myself?
Sometimes. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
What do you need from me for a quote?
Only a few details: the address or postcode, what’s wrong and any access issues. After that, simply call 0345 464 0079 or drop us an email.
Do you guarantee your work?
Yes. Every job comes with a one-year guarantee.
Do you do commercial work?
Yes. We work in offices, washrooms, hotels and other commercial premises. Working times can be discussed when we quote.
How long should I leave it?
Many sealants skin over quickly but take longer to cure fully. We will give you the cure time for the product we used before we leave.
Places near Shaw
More services for Shaw
How we quote for new build mastic
Every job gets its own quote. These are the things that affect it:
- Whether old sealant or filler has to be cut out
- Whether there’s mould to deal with
- Any working-time requirements on site
- The number and length of the joints
What it costs depends on how much there is to do, how much old material has to come out and how easy the joints are to reach. You’ll have a clear quote before any work starts, so you know where you stand.
What to tell us for a quote
Before you ask for a quote, have a think about:
- How we’d reach the joints
- A few pictures by email, if you can
- The problem you’ve noticed
- How many joints, rooms or windows are involved
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, call 0345 464 0079 or drop us an email.
When it is not the sealant
A few problems are outside what sealant work can do:
- Damaged fittings that need replacing
- Structural cracks in walls or ceilings
- Your warranty claim itself, which is between you and the builder
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we’ll tell you honestly.
Where we work in Shaw
- Bathrooms & en suites
- Kitchens
- Skirting & floors
- Plot handovers
- Show homes
- Windows & doors