Construction Mastic in Shoreham-by-Sea
Mastic packages for new-build and refurbishment projects throughout Shoreham-by-Sea and nearby, by CSCS-carded applicators. Fully insured and CHAS accredited.
- Oversized or tapered gaps around new frames
- Caulk cracking where joints are moving more than expected
- A mastic package split between trades with no clear owner
Construction mastic in Shoreham-by-Sea
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
Construction mastic in Shoreham-by-Sea, done properly
Mastic tends to be one of the final packages before handover, so it lands at exactly the point the programme is tightest. Mastic Doctor takes on mastic packages for main contractors and developers on schemes in Shoreham-by-Sea, following the trades through the building as rooms and elevations become ready. If you’re dealing with existing joints on a refurb that need cutting out and resealing and external joints sealed in damp or cold conditions that are now failing, we can put it right, on cladding and panel joints, floor and skirting junctions and brick and block movement joints alike. Most enquiries from Shoreham-by-Sea start with one failed joint and grow into a wider look at the building: we look at the rest while we’re there and tell you what we find.
For contractors on site in a town like Shoreham-by-Sea, the mastic has to fit the programme: sealing as scaffold comes down or as each floor is decorated, and snagging before handover. Tell us the programme and we will quote to it.
Guaranteed is the last step of every job. Our workmanship is backed for 12 months, and we explain exactly what that covers when we quote.
- Place
- Shoreham-by-Sea (BN43, BN15, BN42)
- Wider area
- West Sussex
- Guarantee
- 12 months on every job
- Quotes
- Quoted before any work starts
- Call
- 01277 525 020
- Updated
- 3 November 2026
What the job involves on each surface
Fire-rated sealant where specified
Where the specification calls for fire-rated or intumescent sealant around service penetrations or linear gaps, we install it to the manufacturer’s tested detail. The design and sign-off of fire stopping sit with the designer, principal designer or fire engineer.
Snagging before handover
Snagging is often the final mastic stage. We can work through the snag list area by area and damaged joints are redone rather than patched.
Site staff or a sealant specialist?
General builders and handymen seal joints, but it isn’t their main trade. A specialist prepares properly, controls joint depth and picks a product with the right movement class.
There’s also the paperwork. Main contractors and clients often ask for CSCS cards, RAMS and insurance details, and our CSCS-carded applicators are used to working under those rules.
Signs you need construction mastic in Shoreham-by-Sea
Wide, tapered or inconsistent gaps around frames are a common problem. Every product has limits on how wide a joint it can bridge, so gaps outside that range need sorting by the installer first. We flag them early rather than filling them with sealant that won’t last.
Most enquiries start with one or more of the following:
- Cracks opening in caulked internal joints
- A mastic package split between trades with no clear owner
- Window and door perimeters that won’t pass inspection
- Bath and shower joints scraped during the final clean
Older buildings in the area around Shoreham-by-Sea, such as Portslade Manor (2.3 miles east of Shoreham-by-Sea), need care when sealed: the product has to suit soft or historic materials.
Before you book anyone
- Will failed sealant be removed rather than covered?
- What the guarantee covers, and for how long
- Who will actually carry out the work
- Is depth set with backing rod, or bond-breaker tape in shallow joints?
Diagnose, treat, sign off
On arrival, we report to your site contact and complete whatever induction the building runs. Floors, finishes and fittings next to the joints are covered before anything is cut or cleaned, and the work typically takes a day or two on a small fit-out and several weeks on a large multi-storey package. In a town such as Shoreham-by-Sea, most jobs are single buildings. Your photos, drawings or a site visit come first, followed by a fixed quote.
- We walk the site or review drawings to understand the package.
- A fixed quote sets out scope, products and phasing.
- Site paperwork is confirmed and our CSCS-carded applicators are inducted.
- Sealing follows the programme as areas are released.
- Any frame gaps or issues outside our scope are flagged to the site team.
- Final snagging is completed and the 12-month guarantee applies.
What we need from you
- Let us know about inductions and permits
- Arrange parking or a loading space
- Warn occupants and staff about the work
Getting a fixed quote
Specifications, drawings and tender packages are welcome with any enquiry, and we’ll price the work to it. For smaller jobs, photos and a description will do.
Related advice
Also near Shoreham-by-Sea
What else we do in Shoreham-by-Sea
Maintenance after handover
Keep the joints in good shape with a few simple steps:
- Keep product details for future maintenance
- Allow flexibility for external sealing in damp or cold weather
- Ask installers to correct oversized gaps first
- Don’t schedule sealing before decorators and flooring are done
At handover, keep the product details with the O&M information. Future maintenance is easier when the products are known, and tells you what to reseal with. Tell us what records you need and we will confirm with the quote.
Snag items left to the last week put handover at risk. A planned close-out through each area as it completes keeps the list short, and avoids a rush.
Facades, frames and programmes in Shoreham-by-Sea
Shoreham-by-Sea sits close to the coast, within about 1 mile. On a coastal site, facade and perimeter joints face driven rain and, closer to the beach, salt, which puts weight on correct joint sizing, priming and a sealant suited to the exposure. Shoreham-by-Sea sits in one of the drier corners of the country, the South East. Still, external mastic needs dry faces within the maker’s temperature limits, which isn’t every day, so external mastic is timed for workable conditions and agreed with the site manager.
New units and refits on sites such as Dolphin Industrial Estate (0.6 miles east of Shoreham-by-Sea) need their panel and perimeter joints sealed to the specification. For a contractor working at a hospital such as Southlands Hospital, 0.6 miles north-east of Shoreham-by-Sea, perimeter and facade sealing is planned around patients and deliveries.
Shoreham-by-Sea is about 4 miles west of Brighton and Hove, in West Sussex. We cover Shoreham-by-Sea and the rest of West Sussex, and jobs here get the same fixed quote and 12-month guarantee as anywhere else. We work across 373 places in West Sussex, from busy centres to rural villages. We also cover Brighton, some 6 miles away.
Commercial sites across BN43, BN15 and BN42 are covered. Streets here include Adelaide Square, High Street and Rainbow Square. Being close to the A27 and A259, Shoreham-by-Sea is easy to get to with materials and equipment. We also cover Old Shoreham (1 mile west), Kingston by Sea (1 mile east), Adur (1 mile north-west), Southwick (2 miles east) and Portslade (2 miles east). Nearby towns on our patch include Worthing (6 miles west), Haywards Heath (14 miles north-east), Burgess Hill (10 miles north-east), Littlehampton (12 miles west), Rustington (11 miles west) and Storrington (10 miles north-west).
What’s near Shoreham-by-Sea
Locally, jobs take us to sites close to Shoreham College, The Crabtree pub and Shoreham Academy. There’s a railway station in Shoreham-by-Sea itself: Shoreham-By-Sea station. A little further out are Southlands Hospital (0.6 miles north-east). Green spaces nearby include Thundersbarrow Hill and Shoreham Beach.
Shoreham-by-Sea: questions and answers
Can you work on a hospital site such as Southlands Hospital?
Yes, hospitals are one of the sectors we cover. The estates team’s permit system and infection-control rules come first, and the work is planned around them.
Do you cover business parks and estates near Shoreham-by-Sea, such as Dolphin Industrial Estate?
Yes. Estates, retail parks and business parks around Shoreham-by-Sea, Dolphin Industrial Estate among them, are all within reach. Send details of the unit and the work through our quote form for a quick quote.
What do you charge?
That depends on the job: quantities, access, the product and any phasing. Call for a fixed quote and we’ll price it properly.
Is any job too small?
Whatever the size, the process is the same: send details, get a fixed quote, we seal, guaranteed.
Will you come and look before quoting?
Many jobs can be quoted from photographs, drawings or a joint schedule. Where they aren’t, we arrange a site visit.
Can you fit around our programme?
Working to your programme, we seal each area as it’s handed over. The sequence is agreed with the site manager at the start and updated as the programme moves.
Does weather affect external mastic work?
Weather matters for external sealing: the joint needs to be dry and within the product’s temperature range. We plan external elevations with that in mind.
When something else is needed
Before quoting, we check that sealant is the right answer. It won’t put right:
- Defective windows, doors or glazing units (the supplier or installer’s job)
- Frame gaps too wide for sealant, which the installer needs to correct
- Fire-stopping design or sign-off (that’s for the designer, fire engineer and building control)
Not sure which it is? You can call the office on 01277 525 020 or email a schedule or drawings and we will tell you honestly.
What we seal
- Brick and block movement joints
- Cladding and panel joints
- Window and door perimeters
- Floor and skirting junctions
- Internal decorators’ caulk
- Sanitary and kitchen joints