West Sussex · England
New-build mastic & snagging in Jacob's Post, West Sussex
Specialist new build mastic for Jacob's Post: careful preparation, the right product and tidy work. Call for a quick quote.
- Kitchen sealant that has pulled off the wall
- Cracked sealant around new window and door frames
- Cracked caulk along new skirting
Surface by surface
Plot handovers
Plot mastic is carried out to the developer’s schedule. Each joint is cleaned and primed where needed so the sealant lasts.
Windows and doors
The gap between a new frame and its plaster reveal often opens up. We cut out the cracked bead and reseal with a flexible sealant that suits the frame.
New build mastic in Jacob's Post, done properly
A new build should have a neat, sound bead at every joint. When the finish is smeared, patchy or already cracking, it’s worth putting right early, before water reaches anything behind it. Common call-outs are for messy sealant that spoils new finishes and skirting joints opening in the first winter, on windows & doors, bathrooms & en suites and show homes.
Work in a small place like Jacob's Post just needs the journey and access planning, and once on site, the job is the same as anywhere.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we will sort it.
- Where
- Jacob's Post (RH15)
- Region
- West Sussex
- Cover
- One year on every job
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Looking after it afterwards
Once the sealant has cured, a few habits help it last:
- Clean sealant with mild detergent, not abrasives
- Ventilate bathrooms well, especially in the first year
- Record problems with dated pictures
- Resist patching a failed seal with a tube from the DIY shop
Keep the bathroom ventilated, especially in the first year. Run the fan or open a window after bathing.
Do not let the snagging period run out with sealant problems unreported. Once it ends, the repair may be down to you.
How we quote for new build mastic
You will get a clear quote before we start. It’s based on:
- Any working-time requirements on site
- The size of the job
- The type of sealant required
- The old material and how stubborn it is
The cost depends on how much there is to do, how much old material has to come out and access to the work. You will have a clear quote before any work starts.
Asking for a quote
What to tell us when you ask for a quote:
- Roughly how big the job is
- Any previous sealing or DIY work
- Where the job is, and your postcode
- A few photos by email, if you can
We quote each job on its own, so start by telling us what you need. Simply phone 0345 464 0079 or email us and describe the job.
DIY versus a professional finish
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly, so tell us about it when you ask for a quote.
The process
On the day, we look over the joints with you first. Surfaces next to the work are protected before any work begins. The work generally takes a few hours in a single home. Somewhere like Jacob's Post 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.
- We start by going through the snagging items or plot schedule with you.
- The failed sealant is removed completely down to clean surfaces.
- Joints are vacuumed and cleaned of building dust.
- 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.
Getting ready for the visit
- Keep pets and children clear of the area while we work
- Tell us about any water getting in
- Try not to wet indoor joints just before the visit
Getting a quote
Need a quote? Please call 0345 464 0079 or drop us an email and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
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Honest limits
Some problems need a builder, plumber or other trade rather than us:
- Deciding who is responsible under a builder’s warranty
- Leaks from pipes, valves or wastes, which need a plumber
- Movement caused by a poorly fitted tray or bath
If in doubt, phone 0345 464 0079 or send us an email and we’ll say what we think.
What we seal
- Kitchens
- Bathrooms & en suites
- Windows & doors
- Show homes
- Skirting & floors
- Plot handovers
Also near Jacob's Post
Also in Jacob's Post
Common questions in Jacob's Post
Is Jacob's Post in your area for new build mastic?
Yes, Jacob's Post is within the area we cover. We work across London and the South East. Just phone 0345 464 0079 or email us with a few details of the job, and we will send you a clear quote.
Do you cover smaller places like Jacob's Post?
Yes. Jacob's Post is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Can new sealant go on top of the old bead?
No. The old sealant is cut out fully, then clean and prime the joint, and a new bead applied.
Should I try DIY first?
It depends on the job. High-level, external movement and fire-rated joints are professional jobs, while a short indoor joint may be within reach.
Is there a guarantee?
Yes. Every job comes with our 12-month guarantee.
Can you work on commercial sites?
Yes. Hotels, offices and other businesses use us, and we are fully insured.
Can you work from my snagging list?
Yes. Snagging lists are a common starting point for us. We agree the sealant items with you before work begins.
Can you do plot mastic on a new development?
Yes. We work through plots to your schedule, room by room. Get in touch with the number of plots and the scope for a clear quote.
New homes and floors in Jacob's Post
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
In and around Jacob's Post, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint. If you’ve bought a new home near Burgess Hill station, the sealant around baths, showers and frames is worth checking in the first year or two.
Jacob's Post is about 1 mile west of Burgess Hill, in West Sussex. We carry out new build mastic for householders, landlords and businesses in Jacob's Post. We cover 371 towns and villages across West Sussex. Brighton is on our list too, about 9 miles from Jacob's Post.
Every address in RH15 is covered for new build mastic, from the main roads to the quietest streets. Whether your property is on Downs Road, London Road and Western Road or a nearby road, our applicators can take on the job. If you’re just outside Jacob's Post, we cover Burgess Hill (1 mile east), Abbotsford (1 mile north), World's End (1 mile east), Goddards Green (1 mile west) and Hurst Wickham (2 miles south-west). Further out, we also cover Crawley (11 miles north), Horsham (11 miles north-west), Worthing (15 miles south-west), Haywards Heath (3 miles north-east), East Grinstead (13 miles north-east) and Shoreham-by-Sea (10 miles south-west).
Near you in Jacob's Post
Typical jobs here are in homes near The Cricketers pub, St Paul's Catholic College and Oakmeeds Community College, among other places. For rail, the closest station is Burgess Hill station, roughly 0.7 miles south-east of the centre. Other landmarks nearby include Burgess Hill Museum (0.5 miles south-east) and The Dene Hospital (1.2 miles west). For a walk, there’s Bedelands Farm Nature Reserve and Wolstonbury Hill.
Why it’s worth doing now in Jacob's Post
Water getting past a failed seal in a new build reaches walls and floors that are still settling. Dealing with it early keeps the damage away from ceilings, floors and finishes. Around Jacob's Post, 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 Jacob's Post clients choose us
- 20+ years of sealant experience
- Fully insured
- Colour picked to suit the job
- Anti-fungal sanitary silicone in wet areas
See our cost guide or what customers say.