Fire stopping in Radwell
Fire-rated and intumescent sealing of service penetrations and linear gaps across Radwell, carried out by CSCS-carded applicators. CHAS accredited and fully insured.
- Fire-stopping items raised at inspection or handover
- Fire stopping installed outside its tested range
- Damaged fire seals in risers and voids
Fire stopping near Radwell
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
Fire stopping in Radwell, done properly
A lot of fire-stopping work comes after M&E installation, a refit or a tenant fit-out. Each new cable, pipe or data route cut through a fire-resisting wall leaves an opening behind, and they are easy to forget. We close the openings listed on your schedule, using the specified sealant and detail. Site teams most often ask us about fire seals cut back for extra cables and never reinstated and fire sealant pulled out of the opening, across joints between fire-resisting walls and floors, linear gaps at wall heads and cable penetrations. Whoever orders the work in Radwell, the brief is normally the same: a clear scope, tidy work and joints that don’t fail again.
For a smaller site near Radwell, we plan to do all the penetrations in one go, so send the specification and photos first. Design and sign-off belong to the designer or building control; we install what’s specified.
The 12-month guarantee covers our workmanship: the preparation, the sealing and the tooling. It doesn’t extend to damage, other trades’ later work or movement the joint was never designed to take.
- Where
- Radwell (SG7)
- Region
- Hertfordshire
- Guarantee
- A 12-month guarantee
- Price
- Quoted before any work starts
- Phone
- 01277 525 020
- Updated
- 3 November 2026
On site: what to expect
Working in a building that stays open takes some planning. The work area is signed and kept contained, keep walkways clear and work section by section so the rest of the building stays in use. For a building around Radwell, tell us how to find it and who will meet us. Send that with the details and we’ll confirm the plan with the quote.
- First we confirm the product and tested details named in the specification.
- We sort the openings by the detail each one needs.
- Old or wrong materials are cut out.
- Where the detail needs backing, it goes in at the stated depth.
- We gun the sealant in to the specified depth around each service and tool it.
- We walk the completed areas with you and confirm the records agreed at quote stage.
Getting the site ready
- Share the asbestos register for older buildings
- Let us know about inductions and permits
- Send your site hours and access windows
Ask for a quote
Every quote starts with the facts: what’s there, how much of it, how we reach it and what’s specified. Send what you have, and we will arrange a site visit if anything is unclear.
Read more
Maintenance after handover
Cleaning and maintenance staff play a part too. Share these points with them:
- Leave fire sealant to cure fully before covering it
- Check risers and ceiling voids after each round of works
- Put resealing into every M&E and fit-out package
- Treat an open penetration as a priority repair
Never top up a fire seal with foam, ordinary silicone or filler. Repairs need the same product and detail as the original unless the designer specifies otherwise.
On fit-outs, get the fire-stopping specification agreed before the services go in. Details can then be picked to suit the actual pipes, cables and ducts.
Why it’s worth doing now in Radwell
Inspections and handover checks often pick up fire stopping. Late discoveries can delay handover while openings are reopened and resealed. Older rural buildings around Radwell move with the seasons, and rigid or tired sealant can’t keep up. A sealant with the right movement capability, correctly sized, lasts far better.
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?
- Clear, fixed quotes
- Specification-led, product-correct work
- Public liability insurance in place
- Failed material removed, not covered up
Take a look at what affects the cost or our accreditations.
What sets the cost
Before we quote, we look at:
- Access and working height
- Site requirements such as inductions and permits
- Backing rod, priming and other preparation
- Removal of failed or old sealant
Every site prices differently: the joint sizes, the specified product, access and working hours each have a bearing. A fixed quote follows once we understand the job.
Sending details for a quote
For an accurate fixed quote, we need to understand the site. Useful things to include:
- A wide shot and a close-up of the area
- The type of building and who uses it
- Asbestos survey details if the building is older
- When you need the work done
The quickest route to a quote is a few photographs and the site postcode. Upload them with the quote form, or ring 01277 525 020 or email us to discuss it first.
Different surfaces, different methods
Metal pipes
Heat travels along metal pipework. If the detail needs something beyond sealant, we tell you.
Risers and ceiling voids
Voids hide a lot of unsealed openings. We follow your schedule area by area, and note anything we find that isn’t on it.
Where services cross fire walls in Radwell
Radwell is about 35 miles from central London. Business park offices in the commuter belt are refitted as tenants change, and each fit-out adds services through compartment walls. Approved Document B is the English guidance that covers fire stopping around openings and penetrations. Its BS 476 references are being withdrawn from 2 September 2029, with BS EN 13501-2 classification taking over, subject to transitional arrangements. What we install is set by the specification, and it goes in to the tested detail.
Refits at places like Letchworth Gateway Retail Park (2 miles south of Radwell) often reroute services through walls between units. Hotels such as The Old George And Dragon Hotel (1.4 miles south-east of Radwell) rely on fire-resisting walls between bedrooms and corridors, and refits that add services leave penetrations to seal where fire-rated sealant is specified. For a hospital such as Fairfield Hospital, 1.9 miles to the west of Radwell, penetration sealing is typically phased ward by ward, with infection-control rules agreed first.
Radwell is about 2 miles north of Letchworth, in Hertfordshire. We cover Radwell, and jobs here get the same fixed quote and 12-month guarantee as anywhere else. We work across 371 places in Hertfordshire, from busy centres to rural villages. For work in that direction, see our London page (35 miles or so).
Postcode districts covered here: SG7. Among the streets we cover are Radwell Lane and The Limes. If your building is just outside Radwell, we cover Stotfold (1 mile west), Stotfold Common (2 miles north-west), Fairfield (2 miles west) and Astwick (2 miles north-west). Bigger towns within reach include Stevenage (7 miles south), Welwyn Garden City (14 miles south), Harpenden (15 miles south-west), Hitchin (5 miles south-west), Hertford (15 miles south) and Ware (15 miles south-east).
Near you in Radwell
We work on buildings around The Knights Templar School, Norton School and The Chequers Public House, among other places. Radwell’s nearest station is Baldock station, about 1.2 miles south-east of the centre. A little further out are Bygrave House (2 miles east) and Fairfield Hospital (1.9 miles west). The countryside around Radwell includes Arlesey Old Moat and Glebe Meadows.
For managing agents and facilities managers
We take on planned maintenance as well as one-off repairs: resealing failed joints building by building, on a schedule that suits your budget. Sites in Radwell can sit alongside others in a wider programme across Hertfordshire.
Facilities managers want contractors who arrive with the paperwork sorted. Tell us what site paperwork you need, such as RAMS, an insurance certificate or CSCS details, and we’ll confirm with the quote.
Common questions from Radwell clients
Is a smaller place like Radwell outside your area?
No. Small places get the same service as large ones. London and every South East county are within our area. Where we can, we group nearby jobs to make the most of each trip.
Is Letchworth Gateway Retail Park, near Radwell, within your area?
Yes. Estates, retail parks and business parks around Radwell, Letchworth Gateway Retail Park among them, are all within reach. A few photographs and the unit address let us price the work.
Does weather matter for sealant work?
Outside, yes. The joint has to be dry and within the product’s temperature range, so frost, rain or cold mornings can delay outside work. Inside work is seldom held up.
Is any job too small?
We quote for single jobs as well as large packages and programmes. Photos and a description are enough to start.
Are you fully insured?
Yes. Our insurance certificate can be sent alongside the quote.
When is resealing likely to be due?
There isn’t a single answer, since movement, weather, cleaning and use all affect it. Regular checks let you plan resealing before leaks or damage.
Can you seal any opening with fire-rated sealant?
No. It depends on the tested detail for that wall or floor and service. Collars, wraps, batts and boards exist for openings sealant doesn’t cover, and we flag those rather than improvise.