Hertfordshire · England
New Build Mastic in Sarratt
Plot mastic for developers and snagging failed sealant in new homes in Sarratt, with a one-year guarantee on every job. Ask us for a quote.
- Second-fix sealing on new plots
- Frame joints opening as the plaster dries
- Gaps behind new kitchen upstands
New build mastic in Sarratt
For builders and developers, we work through plots to the schedule you give us. We seal bathrooms, kitchens, windows, doors and skirting so plots are ready to hand over with a sealant suited to each area. If you have new-build shower sealant that has already split and cracks appearing as a new home settles, we can put it right, whatever the surface.
Around Sarratt, older homes often have timber floors that move through the year, which is why skirting and threshold joints need a flexible sealant, not filler.
You are covered for a year from the day we finish. If there’s a problem with it, please ring 0345 464 0079 or drop us an email.
- Place
- Sarratt (WD3)
- Region
- Hertfordshire
- Guarantee
- One year on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Sarratt: your questions answered
Do you cover smaller places like Sarratt?
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.
Do you work for landlords with property near Chorleywood station?
Yes, landlords and agents are among the people we work for. You can phone 0345 464 0079 or email us with the details for a clear quote.
Where do you work from?
Our base is Crawley, with over 20 years’ experience. Our area covers South East England, London and Scotland.
Which products do you use?
Quality sealants from brands including Arbo and Everbuild, chosen to suit the joint. We will tell you what we’re using and why.
Do I have to be there?
We need access to the joints, so we will agree that with you when we book. For inside work, that normally means someone being in.
How long will you be here?
A typical job takes a few hours for most snagging lists, longer for a run of plots. We’ll confirm how long when we quote.
Should I wait before resealing?
If the seal has failed and water is getting in, do it now. Hairline cosmetic gaps can wait until the house has settled.
How long before the joint can be used?
That depends on the sealant used, so please follow the time we give you when we finish.
What happens if it’s left?
If you’re still in the builder’s snagging or warranty period, ask them to put it right first. If it’s slow, or the same joint keeps failing, a proper reseal from a specialist is the next step. Where a wall is exposed, as many are in small places like Sarratt, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
The cost reflects the work involved, not guesswork. That’s why we ask about the job first.
Why us?
- An ARBOMaster approved applicator
- Old sealant always removed completely
- More than 20 years in sealant work
- 12-month guarantee on every job
Take a look at our cost guide or what customers say.
How we quote for new build mastic
There’s no set price list, because jobs vary so much. The quote depends on:
- The type of sealant required
- How easy the joints are to reach
- How many areas need sealing
- The old material and how stubborn it is
There are no prices on our website, because each job is priced on what it involves. For a quick quote, please ring 0345 464 0079 or send us an email.
What we need to know
You don’t need to know the technical terms. It helps if you can tell us:
- Photos by email, if that’s easy
- If someone has resealed it before
- The type of property
- What the problem is, such as mould, gaps, leaks or cracking
Getting a quote is simple: let us know what needs doing and where. Photos by email help us understand the job.
Honest limits
It helps to know what we cannot do too:
- Settlement cracks that need a surveyor
- Leaking fittings rather than failed sealant
- Damaged fittings that need replacing
If you are not sure, just ring 0345 464 0079 or send us an email and we will give you a straight answer before booking.
What we seal
- Skirting & floors
- Kitchens
- Windows & doors
- Show homes
- Plot handovers
- Bathrooms & en suites
Should I try it myself first?
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.
If you’re set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
For landlords and businesses
In hotels, rooms out of use cost money, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
We work for letting agents and landlords as well as householders. Resealing between tenancies keeps a property looking cared for.
What happens on the day
Once we’re on site, we check the joints match what you told us. If we find something unexpected, we talk it through with you first. Most jobs then take anything from a few hours to several days, depending on the number of plots. In a small place like Sarratt, access is usually the main thing to plan. 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.
- Every bit of the old builder’s sealant is cut out.
- 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.
- Each bead is tooled and the cure times explained.
Preparing for the visit
- Keep pets and children clear of the area while we work
- Mention any parking rules near the property
- Tell us about any water getting in
How to get a quote
Need a quote? Please call 0345 464 0079 or send us an email and tell us about the job. We’ll explain what we’d do and give you a clear quote before work begins.
Advice
What the job involves on each surface
Bathrooms and en suites
Shower trays in new homes often move slightly in the first year. We reseal once the old bead is fully out.
Show homes
We seal show-home bathrooms, kitchens and frames. Tell us when the home is open so we can plan around it.
Places near Sarratt
What else we do in Sarratt
New build mastic in Sarratt: local notes
The South East is one of 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 Sarratt, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint. For new homes near Chorleywood station, it’s worth checking the sealant early, while snags are still fresh.
Sarratt is about 3 miles north of Rickmansworth, in Hertfordshire. Whether you’re in the middle of Sarratt or further out, new build mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Sarratt is one of 381 towns and villages in Hertfordshire where we work for new build mastic. You can also see our page for London, roughly 21 miles from Sarratt.
Every address in WD3 is covered for new build mastic, from the main roads to the quietest streets. Local streets include Alexandra Road, Downer Drive and The Briars, and we cover them all. Other places close to Sarratt include Micklefield Green (1 mile south-east), Bucks Hill (1 mile north-east), Chandler's Cross (2 miles south-east), Loudwater (2 miles south) and Chorleywood West (2 miles south). Within a short drive, we also cover Watford (4 miles east), Hemel Hempstead (5 miles north), St Albans (8 miles north-east), Welwyn Garden City (15 miles north-east), Harpenden (11 miles north-east) and Hatfield (12 miles north-east).
What’s near Sarratt
Typical jobs here are in homes near The Boot Public House and St Clement Danes School and the streets around them. The nearest railway station is Chorleywood station, roughly 2.3 miles south-west of the centre. Nearby you will also find Chiltern Open Air Museum (3.8 miles south-west) and Leavesden Hospital (4 miles east). Not far away are Sarratt Bottom nature reserve and Tumbling Bay.