Mark Cross fire stopping
Fire-rated and intumescent sealing of service penetrations and linear gaps throughout Mark Cross and nearby, carried out by CSCS-carded applicators. Fully insured and CHAS accredited.
- Head-of-wall gaps with no fire seal
- Non-fire-rated filler around services
- Penetration schedules that need working through
Fire stopping across Mark Cross
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
What the job involves on each surface
Drylining partitions
Drylined fire walls are tested in a particular build-up. The sealant detail has to be tested in that wall type, with the stated board layers first.
Cables and cable bundles
Single cables and small bundles are often within a fire-rated sealant’s tested detail. Bundle size, cable type and the space between cables all matter, so we check before sealing.
Fire stopping in Mark Cross
We should be clear about what we do and don’t do. Deciding the specification sits with the designer, the fire engineer and building control. We fit the specified fire-rated sealant following that specification and the maker’s installation guidance. If you have improvised or mixed-product fire seals and snag lists that include open service penetrations, we can put it right. Looking for mastic applicators who cover Mark Cross? We’ve been sealing commercial buildings since 2005, CHAS accredited and a Constructionline member.
Smaller places such as Mark Cross still have buildings with fire-resisting walls and floors: schools, halls, care homes and commercial conversions. If sealant is what the specification names, we install it around the services exactly as the maker’s detail sets out.
Our workmanship is guaranteed for 12 months, in Mark Cross as everywhere else we work. If a joint we sealed fails because of how it was installed, we come back and put it right.
- Place
- Mark Cross (TN6)
- Region
- East Sussex
- Guarantee
- A 12-month guarantee
- Quotes
- Fixed quote, scope in writing
- Telephone
- 01277 525 020
- Last updated
- 3 November 2026
General trades versus a specialist
What you see is the finished bead, but most of the work is hidden. Backing rod, primer where specified and a joint designed to move with the building are where general trades tend to cut corners.
There’s also the paperwork. Many sites expect CSCS cards, RAMS and proof of insurance, and our CSCS-carded applicators are used to working under those rules.
When something else is needed
Not every problem is a sealant problem, and we’re upfront when that’s the case. These need a different solution:
- Writing the fire-stopping specification
- Approving the work on behalf of building control
- Reviewing a building’s overall fire safety
If in doubt, phone 01277 525 020 or email the details over and we will say what we think before you book.
Where we work in Mark Cross
- Linear gaps at wall heads
- Service gaps in risers
- Joints between fire-resisting walls and floors
- Pipe penetrations
- Cable penetrations
- Small duct penetrations where the tested detail allows
Leave it or put it right?
A seal that doesn’t match its tested detail gives false comfort. The fix is to remove it and reinstall to the detail, and doing it once, properly, is cheaper. For buildings around smaller places like Mark Cross, water damage can go unnoticed for longer, especially where a building isn’t used daily, so a failed joint can leak for a while before anyone sees it. Resealing early avoids that.
The work involved drives the cost: stripping out, preparation, sealing, access and phasing. Call for a quote and we’ll explain how it’s made up.
Why us?
- Sealing commercial buildings since 2005
- CHAS accredited contractor
- Work to your specification and the manufacturer’s guidance
- Workmanship guaranteed for 12 months
Read our cost guide and our accreditations.
Also near Mark Cross
Other services in Mark Cross
Diagnose, treat, sign off
A typical day starts with protection: tape along each joint edge and covers over finishes, stock and equipment close by. On site, the work usually takes longer where risers, ceiling voids or occupied floors have to be worked through in sequence, and we clear our waste as we work. Smaller jobs around Mark Cross can be grouped with others nearby, which keeps travel down. You will have a fixed quote before work starts.
- The specification and schedule come first, so we know which details apply.
- Access, permits and the order of areas are agreed with the site team.
- We compare every service penetration with its tested detail before sealing.
- Foam, ordinary sealant and debris come out first.
- Backing and fire-rated sealant are installed to the detail and tooled.
- Anything outside the detail is reported to you rather than sealed.
Preparing the site
- Tell us what induction or permit system the site runs
- Send your site hours and access windows
- Share the asbestos register for older buildings
Getting a fixed quote
Need a figure for a tender or a budget? We will quote against your scope and drawings you can plan around. For a chat about it beforehand, call the office on 01277 525 020 or send photos by email.
Advice
Penetration seals near Mark Cross
Central London is about 34 miles from Mark Cross. Offices around the capital are refitted often, and the cabling that follows can breach fire-resisting walls, and the gaps need sealing with the specified product. Fire stopping of openings and penetrations in England falls under Approved Document B. The national BS 476 classes are due to drop out of it from 2 September 2029, leaving the European BS EN 13501-2 route, subject to transitional arrangements. We install whatever has been specified, to the product’s tested detail.
Theatres, wards and plant rooms at sites like Crowborough War Memorial Hospital (to the west of Mark Cross) all have compartment walls crossed by services. Older community buildings such as St Marks that have been rewired or given new heating can have service gaps through walls worth checking against the specification. On estates like Millbrook Industrial Estate, which lies west of Mark Cross, the wall between office and warehouse is often fire-resisting, and cables through it need the specified seal.
Mark Cross is about 4 miles east of Crowborough, in East Sussex. Commercial clients in Mark Cross can call on us for service penetrations. 308 places across East Sussex fall within our area, including Mark Cross. There’s a separate page for Brighton, about 23 miles away.
Work on service penetrations is covered throughout TN6, whatever the building. Sites close to Mark Cross are covered too, including Town Row (1 mile south-west), The Platt (2 miles north), Argos Hill (2 miles south-west), Rotherfield (2 miles south-west) and Rusher's Cross (2 miles south-east). A short drive away, we cover Hailsham (14 miles south), Crowborough (4 miles west), Uckfield (9 miles south-west), Heathfield (7 miles south), Upper Horsebridge (13 miles south) and Hellingly (12 miles south).
What’s near Mark Cross
Around Mark Cross, our work takes us to commercial buildings near Eridge Park, The Lazy Fox pub and St Joseph Seminary, among other places. Mark Cross’s nearest station is Wadhurst station, about 2.5 miles east. Nearby you’ll also find Crowborough War Memorial Hospital (4.4 miles west). Not far away are Crowborough Country Park.
What sets the cost
To price the job, we consider:
- The product specified
- The size and state of each joint
- The site’s rules and procedures
- How much existing material needs removing
Small jobs and large programmes are priced from the same things: what’s in scope, how we reach it, what’s specified and when it needs doing. Call for a quote and we’ll put a fixed figure on it.
Sending details for a quote
A few photographs plus some basic facts will normally do. Please tell us:
- The asbestos register, for older buildings
- Rough lengths or quantities, or drawings if you have them
- How the joints are reached, and at what height
- Whether the building will be occupied during the work
We quote a fixed sum against the scope you give us, so the cost is agreed before work starts. To ask for one, call the office on 01277 525 020 or email us.
Questions about Mark Cross
Is hospital work, at somewhere like Crowborough War Memorial Hospital, something you do?
Yes, hospitals are one of the sectors we cover. Each area is agreed with the ward or department and the estates team in advance.
How does the move away from BS 476 affect penetration seals in Mark Cross?
From 2 September 2029, Approved Document B drops its BS 476 references in favour of BS EN 13501-2 classification, with transitional arrangements. The designer or fire engineer sets the specification, and we install the product to the manufacturer’s tested detail.
Will you quote for a small job?
We quote for single jobs as well as large packages and programmes. Send details for a fixed quote.
Do you seal on top of existing sealant?
No. Sealing over old material is one of the classic causes of early joint failure, so everything comes out first.
How long do sealant joints last?
There isn’t a single answer, because life depends on how much the joint moves, how exposed it is and how it’s cleaned and used. Regular inspection is the best way to catch problems early.
Do you cover Mark Cross?
Yes. We cover Mark Cross, within our coverage of Greater London, South East England and Scotland. For a quote, phone 01277 525 020 or email drawings and photos.
Are you CHAS accredited and on Constructionline?
Yes. CHAS accredited, Constructionline member, and our applicators hold CSCS cards.