Hertfordshire · England
New-build mastic & snagging in Hitchin, Hertfordshire
Problem with your new-build sealant joints in Hitchin? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Skirting joints opening in the first winter
- Beads laid onto grit and dust from the build
- Untidy sealant flagged on a snagging list
New build mastic in Hitchin, done properly
Building dust is behind a lot of failed new-build sealant. We clean every joint thoroughly and prime where the surface and product need it, so the new bead bonds properly rather than sitting on a layer of grit. Common call-outs are for plot mastic for developers ahead of handover and gaps opening as the house dries out and settles, on skirting & floors, plot handovers and kitchens.
Shops and business units around Hitchin have floors that see a lot of traffic. Joints at thresholds and in tiled or concrete floors need resealing before the edges start to break up.
You’re covered for a year from the day we finish. If anything is not right with it, call 0345 464 0079 or drop us an email.
- Place
- Hitchin (SG4, SG5)
- Wider area
- Hertfordshire
- Cover
- One year on every job
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Why deal with it now?
DIY kits don’t solve the main problems with new-build sealant: grit, unprimed surfaces and old layers underneath. Proper removal and preparation are what make it last. In a family home in Hitchin, a failed seal around a bath or a frame lets water into places you cannot see, like the floor under a bath, the back of a panel or the inside of a wall. Left alone, that means rot, damp and a bigger repair.
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, any mould to treat, and whether the work is at height. We take all of that into account in your quote.
Why us?
- Trusted Arbo and Everbuild sealants
- White, clear, grey or another colour, product permitting
- Colour picked to suit the job
- Fully insured
Read our cost guide and what customers say.
When to call us in Hitchin
The wrong product is sometimes used in the wrong place: caulk where water collects, or a rigid product on a moving joint. Neither lasts long.
The most common problems we see are:
- Second-fix sealing on new plots
- Frame joints opening as the plaster dries
- Gaps opening as the house dries out and settles
- Worktop and upstand sealant coming away
In and around Hitchin, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Before you book anyone
- How much experience the applicator has
- What the quote includes, VAT included or not
- Whether they seal over old material or remove it
- How the surfaces are prepared before sealing
How it works
When we arrive, we look over the joints with you first, so you know exactly what we’re doing. We protect the surfaces around the joints before any work begins. The work normally takes a few hours in a single home. A visit in Hitchin needs access to the work and a place to park close by. For outside work, let us know about side access, gates and any upper-floor joints.
- We go through the snagging list or plot schedule and agree the joints to do.
- We cut out every bit of the failed or messy sealant.
- We clean off dust from the build and prime the surfaces where the product needs it.
- New sealant suited to each joint is applied and tooled neatly.
- Finally, each room is checked and you are given the cure time.
How to prepare
- Move anything stored near the joints
- Let us know about stairs, lifts or work at height
- Let us know about earlier repairs to the joints
Getting a quote
Want a quote for new build mastic? Please call 0345 464 0079 or drop us an email and tell us about the job. We will explain what we’d do and give you a clear quote before we start.
Advice
What affects the quote in Hitchin
You will get a clear quote before we start. It takes into account:
- The number and length of the joints
- The old material and how stubborn it is
- The number of rooms or windows
- Working hours on commercial sites
The cost depends on the amount of work, 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.
Helping us quote
To make quoting easier, please include:
- What’s wrong with the joints now
- How many joints, rooms or windows are involved
- Whether it’s a home or a business
- Any previous sealing or DIY work
Call for a quick quote, or send an email if you’d rather. Tell us about the joints that need doing and we will explain what’s involved and give you a clear price.
Other services in Hitchin
What we can’t put right
It helps to know what we cannot do too:
- Damaged fittings that need replacing
- Structural cracks in walls or ceilings
- A tray or bath that isn’t properly supported, until it’s fixed
If you are not sure, just ring 0345 464 0079 or send us an email and we’ll give you a straight answer before you book.
Surfaces we seal
- Plot handovers
- Skirting & floors
- Bathrooms & en suites
- Kitchens
- Show homes
- Windows & doors
DIY sealant or a professional job?
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly, so tell us about it when you ask for a quote.
Landlord and commercial work in Hitchin
Hotels need rooms back in use, 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.
If you manage several properties in or around Hitchin, jobs at different addresses can be quoted together. Send us the addresses and the work at each, and pictures by email help.
Common questions in Hitchin
I let a flat near Hitchin station. Can you help?
Yes, landlords and agents are among the people we work for. You can ring 0345 464 0079 or drop us an email with the details for a clear quote.
What guarantee comes with new build mastic in Hitchin?
Every job comes with our 12-month guarantee, wherever it is. We’re fully insured, and an ARBOMaster approved applicator.
Why has my new-build shower seal failed already?
Cracking in the first couple of years is common as timber and plaster dry out. Rushed application on dusty surfaces makes it worse.
Should I go to my builder first?
Your builder, if you are still in their snagging or warranty period. After that, or if their repair keeps failing, we can do it and our work is guaranteed for a year.
Where is Mr Mastic based?
Our base is Crawley, with over 20 years’ experience. We work across South East England, London and Scotland.
Do you work for developers?
Yes. Second-fix sealing in bathrooms, kitchens, frames and floors is part of what we do. Good preparation keeps snagging to a minimum.
What should I tell you?
Where the job is, what the problem is and roughly how big it is. If you can, email a few pictures.
Do you hold any approvals?
Yes. We are approved under the ARBOMaster scheme, the approved applicator scheme for Arbo sealants.
New build mastic in Hitchin: local notes
London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you’ve bought a new home near Hitchin station, the sealant around baths, showers and frames is worth checking in the first year or two.
Hitchin is about 5 miles north-west of Stevenage, in Hertfordshire. Across the SG4 area, we cover new build mastic for homes and businesses. Our Hertfordshire coverage runs to 381 places, and Hitchin is one of them. For nearby work, see our London page.
Here we cover the SG4 and SG5 postcode area for new build mastic. If you need new build mastic at a property on Market Place, London Road and Harrison Close or a nearby road, our applicators can take on the job. You will find Hitchin on the A505 and A600, which makes it straightforward to reach with everything needed for new build mastic. We also cover the places around Hitchin: Benslow (1 mile east), Poets Estate (1 mile east), Bearton (1 mile north-west), Walsworth (1 mile north-east) and Westmill (1 mile north-west). Larger places within reach include Stevenage (5 miles south-east), St Albans (14 miles south), Welwyn Garden City (11 miles south), Harpenden (10 miles south), Hatfield (13 miles south) and Hertford (13 miles south-east). Being one of Hertfordshire’s larger places, Hitchin has homes, rented property and businesses of every kind.
Landmarks near Hitchin
We work in homes and buildings around Highbury Infant School and Nursery, Butts Close and Kingshott School, among other places. Nearby too are Radcliffe Arms (under half a mile north-east) and St Mary's Church (within half a mile south-west). Hitchin has its own railway station: Hitchin station. Well-known places in the area include Wymondley Castle (1.7 miles east) and Lister Hospital (3.1 miles south-east). Not far away are Purwell Ninesprings and Markham's Hill.