Hertfordshire · England
New-build mastic & snagging in High Cross, Hertfordshire
Plot mastic for developers and snagging failed sealant in new homes in High Cross, with a one-year guarantee on every job. Ask us for a quote.
- Frame joints opening as the plaster dries
- Second-fix sealing on new plots
- Shower seals failing in the first year or two
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 High Cross, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
Homes and businesses are quoted the same way: the amount of work, the access and the products needed, along with when we can work on site. Ask us for a quote and we’ll go through it with you.
Why book with us
- White, clear, grey or coloured to suit, where the product allows
- Fully insured
- 20+ years of sealant experience
- Experience in homes, commercial sites and hotels
New build mastic in High Cross, done properly
A new house keeps drying out and settling for its first couple of years. Timber shrinks, plaster dries and baths and trays bed down, so sealant that was laid quickly before handover often cracks. We work on show homes, windows & doors and skirting & floors, and people most often call us about worktop and upstand sealant coming away and sealant applied over dusty or wet surfaces.
Older homes in small places like High Cross often have timber floors that move with the seasons, which is why skirting and threshold joints need a flexible sealant, not filler.
We stand behind the work with a 12-month guarantee, so you are covered after we’ve gone.
- Place
- High Cross (SG11)
- Region
- Hertfordshire
- Guarantee
- One year on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
What sealant work can’t fix
New sealant can’t fix everything, and we’d rather say so up front. Sealant won’t put right:
- Plumbing faults behind the sealant
- Settlement cracks that need a surveyor
- Deciding who is responsible under a builder’s warranty
Not sure which it is? You can phone 0345 464 0079 or email us and we will tell you honestly.
Where we work in High Cross
- Plot handovers
- Windows & doors
- Skirting & floors
- Show homes
- Kitchens
- Bathrooms & en suites
Towns and villages near High Cross
More services for High Cross
What new build mastic looks like in High Cross
The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Around High Cross, as everywhere, new build mastic is only as good as the preparation behind it.
High Cross is about 2 miles north of Ware, in Hertfordshire. We carry out new build mastic for householders, landlords and businesses in High Cross and the surrounding area. We cover 381 towns and villages across Hertfordshire, from the larger towns to small villages. For nearby work, see our Chelmsford page (23 miles or so).
Work in SG11 is quoted and booked the same way as anywhere else. We cover properties on North Drive, Chestnut Grove and Poplar Close and the roads around them. If you’re just outside High Cross, we cover Wadesmill (1 mile south-west), Standon Green End (1 mile north), Thundridge (1 mile south), Cold Christmas (1 mile south-east) and Barwick (1 mile north-east). We also work in nearby towns such as Stevenage (8 miles north-west), St Albans (15 miles south-west), Bishop's Stortford (8 miles east), Welwyn Garden City (8 miles south-west), Harpenden (14 miles west) and Hitchin (13 miles north-west).
Around High Cross
Locally, jobs take us to homes and businesses close to The White Horse Inn. The closest station to High Cross is Ware station, about 2.8 miles south. Well-known places in the area include Museum of Street Lighting (3.4 miles south) and Hertford County Hospital (4.6 miles south-west). Green spaces nearby include King's Meads.
What we do, step by step
All our tools and materials come with us in the van, so you do not need to buy or prepare anything. After a quick look at the joints together, the area is protected and the work begins. Most jobs take anything from a few hours to several days, depending on the number of plots. Somewhere like High Cross needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- First we work through your snagging list or plot schedule with you.
- The old bead comes out in full, with no layer left behind.
- Each joint is cleaned of dust and grit, then primed if required.
- A sealant chosen for each area goes in and is tooled smooth.
- Finally, each room is checked and you’re given the cure time.
How to prepare
- Let us know about earlier repairs to the joints
- Mention any tricky access
- Mention any leaks or damp you’ve noticed
Ask for a quote
Asking for a quote is easy: let us know the job and the location. A few photos by email make the job easier to understand, and we will take it from there.
Related advice
Common questions in High Cross
Will you come out to High Cross?
Yes, High Cross is covered. We work across London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Is High Cross in your area for new build mastic?
Yes, High Cross is within the area we cover. We work across London and the South East. Just phone 0345 464 0079 or drop us an email with a few details of the job.
What do you need from me for a quote?
Where the job is, what the problem is and roughly how big it is. If you can, email a few pictures.
Can new sealant go on top of the old bead?
No. We always remove the existing bead, then clean and prime the joint, and a new bead applied.
Is it worth trying it myself?
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.
Do you do commercial work?
Yes. Hotels, offices and other businesses use us and we are fully insured.
Can I send you my snagging list?
Yes. Photos of each sealant item help us quote. Items that need a plumber, tiler or the builder are flagged.
Will it make a mess?
Tidy work is part of the job. We protect what’s around the joints.
Landlord and commercial work in High Cross
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
We work for letting agents and landlords as well as householders. Sealant work between tenants keeps a property looking cared for before the next move-in.
When to call us in High Cross
Fresh sealant can be knocked or cut by trades finishing off. A bead disturbed before it has cured may never seal properly.
Keep an eye out for any of the following:
- Plot mastic for developers ahead of handover
- Gaps behind new kitchen upstands
- Cracks appearing as a new home settles
- Sealant applied over dusty or wet surfaces
If you’ve bought a new home near Ware station, the sealant around baths, showers and frames is worth checking in the first year or two.
Questions to ask before booking
- What happens if they find a problem under the old sealant
- What product goes in the joint
- How the colour is chosen
- Whether VAT is included
Can I do it myself?
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
Different surfaces, different methods
Windows and doors
Draughts around new frames are often a sealant gap. We check and reseal the frame edges.
Bathrooms and en suites
New-build bathrooms and en suites are where sealant fails most often. The old sealant comes out and anti-fungal sanitary silicone goes in after cleaning and priming.