Construction and new-build mastic in Keymer, West Sussex
Work needed on a mastic package in Keymer? We look at it, seal it with the right product and hand it over with a 12-month guarantee.
- A long mastic snag list close to completion
- Different trades sealing to different standards
- Frame gaps too wide for sealant alone
Construction mastic near Keymer
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
Construction mastic for commercial buildings in Keymer
Refurbishment work needs a slightly different approach from new build. Existing joints have to be stripped back to sound faces, because fresh sealant can’t key into cured silicone, and on older buildings we ask for the asbestos survey before disturbing anything. New and existing joints then get the same preparation. If you’re dealing with frame gaps too wide for sealant alone and inconsistent sealant finishes from plot to plot, we can help. A specialist sealant contractor works differently from a general builder: on jobs in Keymer, preparation and product choice get the time they need.
On a small site around Keymer, the mastic is best done in the fewest visits we can manage. Let us know the key stages and we will time the work so nothing waits on us.
Whoever the client is, the cover is the same: twelve months on the work we carried out. It doesn’t extend to damage, faults in the building or work by others, and we are upfront about that.
- Place
- Keymer (BN6)
- Wider area
- West Sussex
- Cover
- 12 months on every job
- Quotes
- A fixed quote before we start
- Call
- 01277 525 020
- Updated
- 3 November 2026
How a job runs
Site rules come first: signing in, inductions and any permit to work. With the paperwork done, we take the joints in the sequence agreed with you, and each area is checked before we leave it. For a site in Keymer, we plan so the whole job is done in one go where possible. Photos with rough sizes let us arrive with everything needed.
- We start with the drawings, specification and programme.
- Quantities are measured and a fixed price returned.
- The sequence is agreed with the site manager.
- Plots or floors are sealed as they’re handed over.
- Every joint is cleaned, set to depth and sealed with the specified product.
- Snags are cleared and the package signed off with our 12-month guarantee.
What we need from you
- Make sure the joints can be reached
- Confirm the product named in the specification
- Let us know about inductions and permits
Ask for a quote
A handful of photos and a postcode is the fastest way to a quote. Upload them with the quote form, or call the office on 01277 525 020 or send photos by email if you’d rather talk the job through.
Advice
Leave it or put it right?
Some packages split mastic across the window fitter, kitchen fitter and plumber. In practice it often means different standards, gaps in responsibility and snags nobody owns. A single mastic package gives one point of responsibility, with the same standard on every plot. For buildings in places like Keymer, one well-planned visit beats several small ones, so it’s worth dealing with every failing joint at once.
Access often affects the price as much as the sealing: easy-to-reach joints are quicker than those that need equipment to get to. Tell us how the joints are reached and call for a quote.
Why us?
- 12 months’ guarantee on every job
- Joints cleaned back to sound surfaces
- Fully insured, including public liability cover
- CSCS-carded applicators
Take a look at our cost guide or our accreditations.
Different surfaces, different methods
Bathrooms, en suites and washrooms
Across a block of flats or a hotel, sanitary sealing is repeated in every room. One applicator team gives the same finish everywhere, plot by plot or floor by floor.
Snagging before handover
Snags typically come from damage by following trades, missed joints or poor earlier work. We price snagging as part of the package or as a separate visit.
New build and refits around Keymer
Keymer lies roughly 40 miles out from central London. Building activity in the commuter belt runs from new flats near stations to business park refurbishments, and main contractors there need mastic that keeps to the programme. 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 we time external mastic for dry faces and agree it with the site team.
On a campus such as University of Sussex, 4.4 miles to the south-east of Keymer, new teaching buildings and residences are typically built and refurbished around the academic year. When a college such as Plumpton College, 3 miles to the south-east of Keymer, builds or refurbishes, the mastic package typically has to fit around students and staff.
Keymer is about 2 miles south of Burgess Hill, in West Sussex. We cover Keymer, and jobs here get the same fixed quote and 12-month guarantee as anywhere else. Keymer is one of 373 places we cover in West Sussex. Sites around Brighton have their own page, about 6 miles away.
Business premises anywhere in BN6 are within our area. We cover commercial and managed buildings on Flowers Close, The Quadrant and Kymer Gardens and the roads nearby. Nearby places we also cover include Hassocks (1 mile west), Ditchling (1 mile east), Clayton (1 mile south-west), Hurst Wickham (1 mile north-west) and Westmeston (2 miles south-east) for mastic packages. A short drive away, we cover Crawley (13 miles north), Horsham (13 miles north-west), Worthing (14 miles south-west), Haywards Heath (5 miles north), East Grinstead (15 miles north) and Shoreham-by-Sea (8 miles south-west).
Landmarks near Keymer
Around Keymer, our work takes us to commercial buildings near The Greyhound Public House and Downlands Community School. The nearest railway station is Hassocks station, roughly 0.5 miles west of the centre. Well-known places in the area include The Dene Hospital (3.2 miles north-west) and Clayton Castle (1.2 miles south-west). The countryside around Keymer includes Ditchling Beacon and Bedelands Farm Nature Reserve.
Questions about Keymer
Can you work on a hospital site such as The Dene Hospital?
Yes. We work in healthcare settings as well as offices and schools. The estates team’s permit system and infection-control rules come first, and the work is planned around them.
Does your area include sites such as Victoria Business Park, near Keymer?
Yes. Estates, retail parks and business parks around Keymer, Victoria Business Park among them, are all within reach. A few photographs and the unit address let us price the work.
Is colour matching possible?
It depends on the product. Some ranges offer many colours, others very few, so the available colours are confirmed with the quote.
Is the mastic package guaranteed?
Each package is signed off with a 12-month workmanship guarantee. Damage by others after we have finished isn’t covered.
How do I request a quote?
The quote form is the simplest route, though you can also call the office on 01277 525 020 or email drawings and photos. Include photographs or drawings if you have them.
What hours do you work?
Mention the site’s hours and access windows in your enquiry, and we’ll schedule the work to suit. Our office runs Monday to Friday, 8am until 5pm.
Do you cover Keymer?
Yes. We take on work across Keymer, and the same phone number covers every area.
More services for Keymer
Commercial clients in Keymer
Building owners and managing agents use us on everything from one building to a spread of sites. One quote can cover more than one site, which keeps the paperwork simple.
Main contractors use us as their sealant subcontractor. We work to your programme, your specification and your site rules, with CSCS-carded applicators on site.
What we’re called out for in Keymer
Value-engineered products sometimes end up in the wrong joints. A general-purpose silicone on a facade or a caulk in a wet area won’t perform like the specified product. We stick to the specified product, or put any alternative to you first.
Look out for the following:
- Bath and shower joints scraped during the final clean
- Internal caulk splitting as the building dries out
- New external sealant already peeling away
- A long mastic snag list close to completion
Units on estates such as Victoria Business Park, 2.1 miles north of Keymer, tend to be reclad and refitted as tenants change, and each job leaves cladding and perimeter joints to seal.
What to look for in a quote
- Whether old or failed sealant will be cut out, not overlaid
- Their plan for phasing and protecting the area
- Who will actually carry out the work
- Is the sealant right for the movement and the substrate?
When to bring in a specialist
Using site staff can make sense for a small touch-up, but anything bigger is another matter: a specialist works through quantities efficiently, leaves a consistent finish and backs it with a 12-month guarantee.
There’s also the paperwork. Main contractors and clients often ask for CSCS cards, RAMS and insurance details, and we will confirm the paperwork you need with the quote.