Construction and new-build mastic in Horsham, West Sussex
Mastic packages for new-build and refurbishment projects throughout Horsham and nearby, carried out by CSCS-carded applicators. CHAS accredited and fully insured.
- Old sealant on a refurbishment that needs stripping before new work
- Bath and shower joints scraped during the final clean
- Mastic snags holding up handover
Construction mastic for Horsham sites
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
Construction mastic in Horsham
Getting a subcontractor through site induction should be simple. We are a Constructionline member and CHAS accredited, and every applicator holds a CSCS card, with public liability insurance in place. Tell us what site paperwork you need (RAMS, insurance certificate, CSCS details) and we will confirm with the quote. We work on sanitary and kitchen joints, floor and skirting junctions and brick and block movement joints, and what we are called in for most is cracks opening in caulked internal joints and external joints sealed in damp or cold conditions that are now failing. Searching for sealant specialists in Horsham? We have been sealing commercial buildings since 2005.
Places the size of Horsham tend to see a steady run of new-build and refurbishment schemes. Mastic packages run from window perimeters and cladding joints to internal and sanitary sealant, all to the specification.
Whoever the client is, the cover is the same: a 12-month guarantee on our workmanship. It doesn’t extend to damage, faults in the building or work by others, and we are upfront about that.
- Location
- Horsham (RH12, RH13, RH20, BN44)
- Wider area
- West Sussex
- Cover
- A 12-month guarantee
- Quote
- A fixed quote before we start
- Phone
- 01277 525 020
- Updated
- 3 November 2026
Quoting for work in Horsham
What shapes the price:
- Location, for remote and island sites
- Backing rod, priming and other preparation
- Whether old sealant has to be cut out first
- Site requirements such as inductions and permits
Cost follows what’s involved: stripping out, preparation, sealing, access and phasing. Call for a fixed quote.
Details that help us quote
To price the job accurately, we need a clear picture of the site. Useful things to include:
- The postcode of the building
- The type of building and who uses it
- The product your specification calls for
- The asbestos register, for older buildings
Every quote starts with the facts: the joints involved, quantities, access and the product called for. Send what you have, and we will arrange a site visit if anything is unclear.
Also near Horsham
More services for Horsham
What we can’t put right
We check first that sealant really is the fix. It won’t put right:
- Joints damaged after sign-off by following trades
- Designing joint widths or choosing the specification (that sits with the designer)
- Fire-stopping design or sign-off (that’s for the designer, fire engineer and building control)
If in doubt, ring 01277 525 020 or email drawings and photos and we’ll say what we think before you book.
What we seal
- Sanitary and kitchen joints
- Window and door perimeters
- Cladding and panel joints
- Floor and skirting junctions
- Brick and block movement joints
- Internal decorators’ caulk
Our process
We begin with a short walk round with whoever looks after the building, to confirm the scope, the order of work and any areas we must keep clear. Then we strip out anything that has failed, prepare every joint and seal it. For premises in central Horsham, deliveries and parking need a bit of planning, whereas edge-of-town units normally have yard space. Either way, tell us what’s available.
- We walk the site or review drawings to understand the package.
- You receive a fixed quote covering scope, products and sequence.
- Paperwork is agreed and applicators are inducted on site.
- We seal plot by plot or floor by floor in line with the programme.
- Any frame gaps or issues outside our scope are flagged to the site team.
- Final snagging is completed and the 12-month guarantee applies.
Before we start on site
- Move anything stored against the joints
- Point out any areas we must not close
- Warn occupants and staff about the work
Quotes
Let us know the site, the scope and your timescale, and we will put a fixed quote together. The easiest way is to call 01277 525 020 or email drawings and photos.
Related advice
Keeping the joints sound
Keep the joints in good shape with a few simple steps:
- Put any product change through the designer first
- Brief following trades on areas that have been sealed
- Keep scrapers and abrasive pads off new beads
- Plan external elevations with the weather in mind
A new structure shifts as it loses construction moisture. The right product in each joint copes with that. We can advise if a joint needs a different product.
A missed perimeter seal on one window can wet the reveal and the plaster inside. On a new building that means remedial work after decorating. A check of every frame before decorators start is worth the time.
Construction mastic around Horsham: how the place shapes the job
The South East is one of the drier parts of the UK. That doesn’t stop wet spells, or frosty starts that leave panels too damp to seal, so external mastic is timed for workable conditions and agreed with the site manager. Several hotels sit less than 2 miles from Horsham. Hotel schemes tend to have fixed reopening dates, so the mastic is programmed tightly with the other trades.
For a contractor at a hotel such as The King's Head Hotel (under half a mile south-west of Horsham), the mastic often has to be finished before a reopening date. Recladding or extending a unit at a site like Nightingale Trading Estate (to the north-east of Horsham) brings panel joints and frame perimeters into the programme.
Horsham is about 31 miles south of London, in West Sussex. Any commercial site in Horsham is covered. We work across 373 places in West Sussex, from busy centres to rural villages. Brighton is covered too, some 18 miles away.
If you need construction mastic in RH12, RH13, RH20 and BN44, the process matches everywhere else we work: send details, get a quote, we seal, guaranteed. Streets here include Station Road, London Road and Market Square, and sites on any of them can send details for a fixed quote. You’ll find Horsham on or near the A24 and A29. Just outside Horsham, we also work in 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). Bigger towns 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). As one of the bigger centres in West Sussex, Horsham has a broad mix of commercial, public and industrial buildings.
Near you in Horsham
Recent enquiries here include premises near Millais School, Warnham Park and Kingslea Primary School, among other places. Horsham has its own railway station: Horsham station. A little further out are Christs Hospital School Museum (2.4 miles south-west) and Horsham Hospital (under half a mile north-west). Not far away are Warnham LNR.
When to call us in Horsham
On construction sites, joints typically fail early because of when they were sealed, not what was used. Sealing before decorators, flooring or other trades have finished leaves joints exposed to damage, so they end up back on the snag list.
Site and facilities staff are often the first to spot these:
- Perimeter gaps outside the sealant’s range
- Failed sealant in an existing building being refurbished
- Frame perimeters left unsealed or poorly sealed
- New external sealant already peeling away
Further education sites such as The College of Richard Collyer, less than half a mile to the north of Horsham, are extended and refurbished from time to time, with mastic often programmed into the summer break.
What to look for in a quote
- Whether old or failed sealant will be cut out, not overlaid
- How they handle RAMS and site documents
- Who will actually carry out the work
- How they’ll work around occupants
How the job changes by surface
External facade and movement joints
External movement joints often need primer, depending on the substrate. We prime where the manufacturer specifies.
Kitchens and utility areas
Worktop upstands, sinks and splashbacks are sealed once the kitchen is fitted. A kitchen-suitable sealant is used and hygienic or food-safe grades wherever food contact is possible.
Common questions from Horsham clients
Will you take on work at estates like Nightingale Trading Estate, close to Horsham?
Yes. Estates, retail parks and business parks around Horsham, Nightingale Trading Estate among them, are all within reach. Send details of the unit and the work through our quote form for a quick quote.
Will you plan work around the academic year at somewhere like The College of Richard Collyer?
Yes. Education sites normally want the work in vacations or in phases during term, and we plan to suit. Tell us which site documents you need, such as RAMS, our insurance certificate or CSCS details, and they’re confirmed with the quote.
How do we ask for a quote?
The quote form is the simplest route, though you can also call 01277 525 020 or email a schedule or drawings. Photos, drawings or a joint schedule help us quote quickly.
Can you seal external joints in wet or cold weather?
External sealant needs a dry joint and a temperature within the product’s range. Damp, frost or condensation on frames can stop work, so internal areas are often done on those days.
How long does a job like this take?
The duration is planned around your programme and the access we are given. We’ll give you an estimate of time on site when we quote.
How soon can the area be used again?
That comes down to the sealant and the temperature. Some take light use quickly, others need longer to cure, so we’ll confirm the curing time on the day.
Is colour matching possible?
In many cases, yes. Many products come in a range of standard colours, and matching to RAL references or surrounding finishes is often possible. We’ll confirm the colours available for the specified product.