Hertfordshire · England
New-build mastic & snagging in The Folly, Hertfordshire
Specialist new build mastic for The Folly: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Worktop and upstand sealant coming away
- Cracked caulk along new skirting
- Plot mastic for developers ahead of handover
New build mastic in The Folly
Some owners wait for the first year’s movement before having joints redone. For small cosmetic gaps, that’s reasonable, but a failed shower or bath seal shouldn’t wait. We’re often asked to deal with messy sealant that spoils new finishes and shower seals failing in the first year or two, across bathrooms & en suites, show homes and windows & doors.
In a village or hamlet like The Folly, new homes are more likely to be a barn conversion or a handful of houses than a big estate. Each still needs its sealant and floor joints finished properly.
You are covered for a year from the day we finish. If anything is not right with it, ring 0345 464 0079 or email us.
- Place
- The Folly (AL4)
- Region
- Hertfordshire
- Guarantee
- 12 months on all our work
- Price
- A clear price before we start
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
What the job involves on each surface
Show homes
We seal show-home bathrooms, kitchens and frames. We will plan around viewing times.
Kitchens
As a new house dries, worktops and walls shift a little, which opens gaps along the back. A fresh flexible bead closes them.
Nearby places to The Folly
Other services in The Folly
When it isn’t the sealant
In fairness, some problems need a different trade:
- Disputes or warranty claims with your builder
- Broken tiles or a split tray
- Cracking that points to a structural problem
If in doubt, call 0345 464 0079 or send us an email and we will say what we think.
What we seal
- Plot handovers
- Bathrooms & en suites
- Show homes
- Skirting & floors
- Windows & doors
- Kitchens
How the visit works
When we arrive, we start by going over the job with you, so you know exactly what we’re doing. We protect the surfaces around the joints before work begins. Most jobs take anything from a few hours to several days, depending on the number of plots. In a small place like The Folly, access is generally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We look at why each joint failed, including any movement.
- Old sealant is cut out and the joints cleaned.
- Joints are dried and primed where the product calls for it.
- New sealant goes in, with baths filled first so they’re at their heaviest.
- We check every joint and leave you with the cure times.
Getting ready for the visit
- Tell us about any water getting in
- Try not to wet indoor joints just before the visit
- Clear items away from the joints we’re working on
Ask for a quote
Asking for a quote is easy: let us know the job and the location. Photos by email help us understand the job, and we will take it from there.
Read more
What affects the quote in The Folly
Your quote is based on your job. We look at:
- Mould in or behind the old joints
- How easy the joints are to reach
- The old material and how stubborn it is
- The number and length of the joints
The cost depends on the size of the job, how much old material has to come out and access to the work. We give a clear quote before we start.
What to tell us for a quote
What to tell us when you ask for a quote:
- Photos by email, if that is easy
- Any previous sealing or DIY work
- The address or postcode of the job
- If it’s domestic, commercial or a hotel
To get a quote, call 0345 464 0079 or send us an email with the location and a short description of the problem. You will have a clear quote before any work starts.
New homes and floors in The Folly
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For new homes near Harpenden station, it’s worth checking the sealant early, while snags are still fresh.
The Folly is about 2 miles east of Harpenden, in Hertfordshire. The Folly gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a 12-month guarantee. The Folly is one of 381 towns and villages in Hertfordshire where we work. There’s also a page for London, about 24 miles away.
Jobs for new build mastic in AL4 works the same way as everywhere else we cover. You will find streets such as Folly Fields and Lower Luton Road, all of which we cover. We also cover the places around The Folly: Lea Valley (1 mile west), Amwell (1 mile south), Mackerye End (1 mile north-west), Blackmore End (1 mile north) and Batford (1 mile west). Further out, we also cover Watford (11 miles south), Hemel Hempstead (8 miles south-west), Stevenage (8 miles north-east), St Albans (5 miles south), Welwyn Garden City (5 miles east) and Hitchin (9 miles north).
What’s near The Folly
Typical jobs here are in homes near Sir John Lawes School and The Cherry Trees pub. The nearest railway station is Harpenden station, about 2 miles west of the centre. A little further out are St Albans City Hospital (4.2 miles south) and Harpenden Museum (2.2 miles west). Not far away are Wheathampstead Local Nature Reserve.
How to look after the new joints
Looking after new joints is easy:
- Avoid running a DIY bead over the old one
- Keep photos and emails about snagging items
- Look at the sealant regularly in the first couple of years
- Wait for the cure time before using a resealed shower
Watch the joints as the house settles. Small gaps can appear as the house dries.
The sooner you deal with untidy or cracking sealant, the less there is to put right. Small faults turn into leaks if left in a busy bathroom.
For landlords and businesses
For anyone letting property in or around The Folly, several properties can go on one quote. Just tell us the addresses and what each one needs.
Housing providers, facilities teams and property managers book us too in The Folly and across Hertfordshire. We can quote a run of properties together, and we’re fully insured.
Questions from The Folly
Do you cover smaller places like The Folly?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Can you do new build mastic in The Folly?
Yes, The Folly is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or send us an email and tell us what needs doing, and we’ll give you a clear quote.
What colour sealant will you use?
White and clear are the most common, but sealant comes in other colours too. We choose one to suit the room.
Do you take on second-fix sealing for builders?
Yes. We carry out plot mastic and second-fix sealing for builders and developers. Send us the plot schedule and we will quote.
Are you insured?
Yes. We’re fully insured for domestic and commercial work.
Are you ARBOMaster approved?
Yes. We hold ARBOMaster approved applicator status and we’re fully insured too.
Do you work through snagging lists?
Yes. Send it with photos and we will quote for the sealant items. If something is not sealant, we’ll say so.
Should I try DIY first?
You can, for simple jobs. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
Common problems we fix in The Folly
Baths and trays settle under load once the home is lived in. If a bath wasn’t filled when it was sealed, the bead is stretched the first time it’s used and can tear.
The most common problems we see are:
- Kitchen sealant that has pulled off the wall
- Untidy sealant flagged on a snagging list
- Plot mastic for developers ahead of handover
- Frame joints opening as the plaster dries
Around The Folly, as everywhere, new build mastic is only as good as the preparation behind it.
Questions to ask before you book
- Whether you can choose the colour
- When the joint can take water or movement
- Who turns up on the day
- Which sealant they’ll use, and why