West Sussex · England
New Build Mastic in Dial Post
Plot mastic for developers and snagging failed sealant in new homes for homes and businesses in Dial Post and across West Sussex. Fully insured, ARBOMaster approved and guaranteed for a year.
- Beads laid onto grit and dust from the build
- Worktop and upstand sealant coming away
- Skirting joints opening in the first winter
New build mastic in Dial Post, done properly
Some new-home owners let the house settle before resealing. That makes sense for small gaps that are just cosmetic, but a failed shower or bath seal shouldn’t wait. We work on show homes, kitchens and bathrooms & en suites, and common reasons people get in touch are sealant work across a run of new homes and cracks appearing as a new home settles.
Somewhere as small as Dial Post, new homes tend to be conversions, self-builds or a few houses rather than an estate. Each still needs its sealant and floor joints finished properly.
All our work is covered by our 12-month guarantee.
- Place
- Dial Post (RH13)
- Region
- West Sussex
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Joints and finishes in Dial Post homes
Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For jobs in and around Dial Post, choosing the right material for each joint is as important as a tidy finish.
Dial Post is about 7 miles south of Horsham, in West Sussex. Wherever you are in the RH13 postcode area, we cover new build mastic for homes and businesses. 371 places in West Sussex are on our list. Our Crawley page covers work nearby, about 13 miles away.
We cover every part of the RH13 postcode area for new build mastic. New build mastic is available to properties on The Green, Swallows Lane and Bentons Lane and the roads around them. If you are just outside Dial Post, we cover Whitehall (2 miles north-west), Shipley (2 miles north), West Grinstead (2 miles north-east), Broomer's Corner (2 miles north-west) and Partridge Green (2 miles east). We also work in nearby towns such as Crawley (13 miles north-east), Horsham (7 miles north), Worthing (10 miles south), Haywards Heath (12 miles east), Burgess Hill (10 miles east) and Littlehampton (13 miles south-west).
Local landmarks in Dial Post
Green spaces nearby include Knepp Wildland and Chanctonbury Hill.
Looking after it afterwards
Good habits help new joints last longer. Our tips:
- Avoid scourers and strong chemicals on sealant
- Look at the sealant regularly in the first couple of years
- Get a leaking seal dealt with right away
- Record problems with dated photos
Clean the sealant with a mild detergent and a soft cloth. Avoid abrasive pads and strong solvents, which can damage the surface.
The sooner you deal with untidy or cracking sealant, the less there is to put right. Left alone, a small crack can become a leak over time.
Why it’s worth doing now in Dial Post
Water getting past a failed seal in a new build reaches walls and floors that are still settling. Resealing promptly protects the new finishes around it. Where a wall is exposed, as many are in small places like Dial Post, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Instead of a standard rate, we look at what your job involves: how many joints, what’s in them now and how we reach them. You’ll know the price before we begin.
What you get with us
- Sealant colour chosen to suit
- Anti-fungal silicone where joints get wet
- Over 20 years’ experience
- White, clear, grey or coloured to suit, where the product allows
Take a look at what affects the cost or customer reviews.
Can I do it myself?
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
What we do, step by step
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. Typically it takes a few hours in a single home and we leave things clean and tidy. For a village or hamlet like Dial Post, the journey is planned in advance: 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, the list of joints is agreed from your snagging sheet or plot schedule.
- The failed sealant is removed completely, with no layer left behind.
- 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.
- We tool every joint neatly and tell you when each area can be used.
How to prepare
- Let us know about parking restrictions
- Let us know about stairs, lifts or work at height
- Try not to wet indoor joints just before the visit
Ask for a quote
Want a quote for new build mastic? Please ring 0345 464 0079 or email us and tell us about the job. We will explain what we’d do and give you a clear price before work begins.
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Towns and villages near Dial Post
Other services in Dial Post
For landlords and businesses
Hotels need rooms back in use, so we plan the work room by room. Hotel work is part of what we do, alongside homes and businesses.
For anyone letting property in or around Dial Post, jobs at different addresses can be quoted together. Just tell us the addresses and what each one needs.
Dial Post: your questions answered
Is Dial Post in your area for new build mastic?
Yes, Dial Post is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or drop us an email and tell us what needs doing, and we’ll send you a clear quote.
Is new build mastic in Dial Post guaranteed?
All our work, in Dial Post and everywhere else, comes with a 12-month guarantee. We are also fully insured and ARBOMaster approved.
Can I send you my snagging list?
Yes. Send the list and a few pictures of the sealant items. We’ll tell you if anything on it is not a sealant job.
Where do you work from?
We are based in Crawley, and we cover South East England, London and all of Scotland.
Are you ARBOMaster approved?
Yes. Mr Mastic is an ARBOMaster approved applicator and we are fully insured too.
Do you work for letting agents?
Yes. We work for homeowners, landlords, letting agents, businesses and hotels across West Sussex.
What does new build mastic cost?
It depends on the job, so we quote each one individually. To get one, call 0345 464 0079 or email us with a short description of the job.
How long will you be here?
It depends on the size of the job, but as a guide it takes a few hours in a single home. We’ll tell you when we quote.
What affects the quote in Dial Post
The price is agreed before any work begins. It takes into account:
- How many rooms, windows or areas are involved
- The amount of work
- How easy the joints are to reach
- Whether old sealant or filler has to be cut out
No two jobs are quite the same, so each one gets its own quote. Size, access and the product the joint needs all make a difference.
What to tell us for a quote
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- What’s wrong with the joints now
- Access, such as stairs, a lift or height
- Where the job is, and your postcode
- Roughly how big the job is
Every job is quoted individually, so the first step is telling us about yours. Simply ring 0345 464 0079 or drop us an email and describe the job and send photos if you have them.
Signs you need new build mastic in Dial Post
When the heating goes on in the first winter, the house dries fast. Gaps open along skirting, frames and worktops and cracked sealant shows up.
The most common problems we see are:
- Leaking shower tray seals in a new home
- Cracked caulk along new skirting
- Cracks appearing as a new home settles
- Smeared, uneven beads picked up at snagging
Around Dial Post, as everywhere, new build mastic is only as good as the preparation behind it.
Comparing quotes
- Which colour the sealant will be
- How hidden problems are handled
- Is VAT in the price?
- Whether they’re fully insured