West Sussex · England
Horsham New Build Mastic
New build mastic across Horsham and nearby, with old sealant always removed completely and a 12-month guarantee.
- Frame joints opening as the plaster dries
- Gaps behind new kitchen upstands
- Sealant that never bonded to the surface
How we handle new build mastic in Horsham
If your new home has a leaking shower seal, open skirting joints or untidy sealant, we can help. If you are still within the builder’s snagging or warranty period, tell them first and if that stalls, we can do it. We work on kitchens, windows & doors and plot handovers, and common reasons people get in touch are joints pulling apart as timber shrinks and sealant work across a run of new homes.
A place the size of Horsham has new developments as well as older streets. New homes need their plot mastic and sealant finished well, and owners often find snags in the first year or two, as a new house dries out and settles.
A 12-month guarantee comes with the work, just as it does everywhere we cover.
- Place
- Horsham (RH12, RH13, RH20, BN44)
- Wider area
- West Sussex
- Guarantee
- One year on every job
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
When to call us in Horsham
Later trades and the final clean can damage fresh sealant. A bead disturbed before it has cured may never seal properly.
People usually contact us when they notice one of these:
- Sealant applied over dusty or wet surfaces
- Cracks appearing as a new home settles
- Plot mastic for developers ahead of handover
- Untidy sealant flagged on a snagging list
For new homes near Horsham station, it’s worth checking the sealant early, while snags are still fresh.
What to look for in a quote
- What guarantee comes with the work
- Whether the sealant suits the joint
- Who turns up on the day
- What happens if they find a problem under the old sealant
Horsham questions
Is Horsham in your area for new build mastic?
Yes, Horsham is within the area we cover. Our work covers London and the South East. Just ring 0345 464 0079 or drop us an email with a few details of the job.
Do you work for landlords with property near Horsham station?
Yes. We work for landlords and agents as well as householders, and several properties can be quoted together. You can call 0345 464 0079 or email us with the details for a clear quote.
How much does new build mastic cost in Horsham?
We don’t publish prices, because the cost depends on the job: its size, the old material, access and the product needed. You will get a clear quote before work begins.
Will it make a mess?
Tidy work is part of the job. We protect what’s around the joints, and the area is left clean when we finish.
When is the sealant fully cured?
Most sealants are touch-dry well before they’re fully cured. We will give you the cure time for the product we used before we leave.
Are you insured?
Yes. Full insurance covers our work, and we can confirm the details when we quote.
Is it normal for sealant to crack in a new home?
Cracking in the first couple of years is common as timber and plaster dry out. Poor preparation at handover adds to it.
Are you an approved applicator?
Yes. We are approved under the ARBOMaster scheme.
What we can’t put right
In fairness, some problems need a different trade:
- Damaged fittings that need replacing
- Leaks from pipes, valves or wastes, which need a plumber
- Your warranty claim itself, which is between you and the builder
If in doubt, ring 0345 464 0079 or send us an email and we’ll say what we think before booking.
Where we work in Horsham
- Plot handovers
- Show homes
- Kitchens
- Bathrooms & en suites
- Skirting & floors
- Windows & doors
Why it’s worth doing now in Horsham
Small cosmetic gaps can wait for the house to settle, but a leaking seal cannot. If you’re unsure which you have, phone 0345 464 0079 or send us an email with pictures and we’ll tell you. In a busy place like Horsham, a failed joint in a flat or office can send water into the space below, where it’s often found late and is bigger to put right.
Homes and businesses are quoted the same way: the amount of work, how we reach it and what it needs, plus any working-time requirements on site. Call for a quick quote and we’ll go through it with you.
What you get with us
- Anti-fungal silicone where joints get wet
- Colour agreed with you before we start
- 20+ years of sealant experience
- White, clear, grey or coloured to suit, where the product allows
Take a look at what affects the cost or customer reviews.
Work for landlords, hotels and businesses
Housing providers, facilities teams and property managers book us too. We can quote a run of properties together.
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
Should I try it myself first?
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.
A careful DIYer can reseal a simple joint, 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 new build mastic looks like in Horsham
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.
In and around Horsham, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Horsham is about 31 miles south of London, in West Sussex. If you need new build mastic in Horsham, please ring 0345 464 0079 or send us an email for a quick quote. We cover West Sussex from our Crawley base. Our area takes in 371 places across West Sussex. Our Crawley page covers work nearby.
Every address in RH12, RH13, RH20 and BN44 is within our area for new build mastic, from the main roads to the quietest streets. If you need new build mastic at a property on Station Road, London Road and Market Square or a nearby road, our applicators can take on the job. Main roads around Horsham include the A24 and A29. Neighbouring places we cover for new build mastic include Tower Hill (1 mile south-west), Broadbridge Heath (2 miles west), Holbrook (2 miles north), Warnham (2 miles north-west) and Southwater (3 miles south). Larger places within reach include Crawley (7 miles north-east), Haywards Heath (11 miles south-east), Burgess Hill (11 miles south-east), East Grinstead (14 miles east), Broadfield (5 miles east) and Storrington (11 miles south-west). Horsham is one of the larger places we cover in West Sussex.
What’s near Horsham
Locally, jobs take us to homes and businesses close to Millais School, Warnham Park and Kingslea Primary School, among other places. There’s a railway station in Horsham itself: Horsham station. Nearby you’ll also find Christs Hospital School Museum (2.4 miles south-west) and Horsham Hospital (within half a mile north-west). Green spaces nearby include Warnham LNR.
How we quote for new build mastic
Every job gets its own quote. These are the things that affect it:
- Any mould that needs treating
- Whether the work is at height
- The old material and how stubborn it is
- When we can work, for business premises
There are no prices on our website, because each job is priced on what it involves. Call for a quick quote.
What we need to know
What to tell us when you ask for a quote:
- Roughly how big the job is
- If it’s domestic, commercial or a hotel
- The address or postcode of the job
- Access, such as stairs, a lift or height
Every job is quoted individually, so start by telling us what you need. Simply ring 0345 464 0079 or send us an email and describe the job and send photos if you have them.
Places near Horsham
More services for Horsham
The process
When we get to you, we compare the joints with what we discussed. If anything is different, we explain it before carrying on. After that, the work takes a few hours for most snagging lists, longer for a run of plots. For homes and businesses in busier parts of Horsham, parking needs a little planning. For flats, mention stairs, lifts and shared entrances as well.
- We start by going through the snagging items or plot schedule with you.
- Every bit of the old builder’s sealant is cut out.
- 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.
Preparing for the visit
- For indoor joints, keep the area dry beforehand if you can
- Mention any sign-in or site rules at work premises
- Keep children and pets away from the work area
Get a quote
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is. When it suits you, phone 0345 464 0079 or email us.