Fire-rated sealing and fire stopping in Letchworth Garden City, Hertfordshire
Fire-rated and intumescent sealing of service penetrations and linear gaps across Letchworth Garden City, carried out by CSCS-carded applicators. CHAS accredited and fully insured.
- Non-fire-rated filler around services
- Openings left by services added after handover
- Unsealed joints where partitions meet the slab
Fire stopping for Letchworth Garden City sites
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
Fire stopping in Letchworth Garden City, done properly
Sealant is the specified answer for plenty of openings, such as metal pipes, cables and some small ducts where the detail covers them. Larger openings and some plastic pipes call for collars, wraps, batts or boards instead. We use sealant where it is the specified product, and we tell you when a detail calls for something else. If you’re dealing with damaged fire seals in risers and voids and unsealed penetrations discovered above suspended ceilings, we can help. Whether you call it commercial sealant work, mastic application or joint sealing, the work in Letchworth Garden City is the same: the right product in a properly prepared joint.
Many town-centre buildings in places like Letchworth Garden City have had layer upon layer of new services, with gaps around pipes and cables left after each change. Intumescent or fire-rated sealant is used wherever the specification asks for it, built up exactly as tested.
The 12-month guarantee covers our workmanship: preparation, application and finish. Damage, later alterations by others and movement beyond what the joint was designed for sit outside it.
- Place
- Letchworth Garden City (SG6, SG7)
- Region
- Hertfordshire
- Cover
- A 12-month guarantee
- Quote
- Quoted before any work starts
- Call
- 01277 525 020
- Last updated
- 3 November 2026
How a job runs
In a busy building, the work is phased so only one area is out of use at a time. Each section is protected, cleaned back and sealed, then reopened once the sealant allows before we move to the next. If you have more than one building in Letchworth Garden City, they can often be done on the same visit. Give us your access times and we will fit the work in.
- First we go through the drawings, schedule or specification for the seals.
- On site, each opening is checked against the tested detail it is meant to follow.
- Anything that doesn’t belong in the opening, such as expanding foam or general-purpose filler, is removed.
- Mineral wool or other backing goes in wherever the detail asks.
- Fire-rated or intumescent sealant is gunned in to the specified depth, then tooled.
- If an opening needs something other than sealant, we tell you instead of improvising.
Getting the site ready
- Let us know about inductions and permits
- Arrange parking or a loading space
- Have the specification and drawings to hand
Getting a fixed quote
The quickest route to a quote is a few photos and the site postcode. Send them through the quote form, or speak to us on 01277 525 020 or email a schedule or drawings if you’d rather talk the job through.
Related advice
What the job involves on each surface
Cables and cable bundles
Cable penetrations are frequently sealed with fire-rated sealant where the detail allows. The detail limits bundle size and the gaps between and around cables, so we check before sealing.
Masonry and concrete
Openings through concrete vary from tidy cores to rough break-outs. Each gap is measured where it is widest so we know it sits within the tested range, and any outside it are raised with you.
Leave it or put it right?
An open or wrongly sealed service penetration lets fire and smoke reach the next compartment much sooner than the building was designed for. Putting it right is usually a modest job when the openings are accessible. Wait until ceilings close or areas are occupied and the same work becomes harder to reach. A failed joint is easier to put right before damp shows inside. Once water gets in, there’s drying out and making good as well.
Larger quantities, tricky access or phasing all shape the price. Site requirements like inductions and permits play a part as well.
Why appoint us
- 12-month guarantee on workmanship
- Constructionline member for supplier checks
- Failed material removed, not covered up
- Our applicators hold CSCS cards
Take a look at our cost guide and our accreditations and insurance.
Fire-rated sealing for Letchworth Garden City buildings
The area within 2 miles of Letchworth Garden City holds a number of hotels. Bedroom-to-corridor walls in hotels are normally fire-resisting, so new cabling or pipework through them has to be sealed to the tested detail. Central London is about 34 miles from Letchworth Garden City. Office refits around the commuter belt bring new cabling through fire-resisting walls.
For a unit at a site such as Letchworth Gateway Retail Park, which lies east of Letchworth Garden City, any new service through a fire-resisting wall should be sealed to the tested detail. For a hospital such as Pinehill Hospital, 2.4 miles to the south-west of Letchworth Garden City, penetration sealing is typically phased ward by ward, with infection-control rules agreed first.
Letchworth Garden City is about 5 miles north-west of Stevenage, in Hertfordshire. Our applicators travel to Letchworth Garden City for work on service penetrations. Letchworth Garden City is one of 371 places we cover in Hertfordshire. We also cover London, some 34 miles away.
We take on service penetrations across the SG6 and SG7 postcode area, whatever the building. Buildings on Pix Road, Field Lane and Ridge Road are within our area for service penetrations. Main routes into Letchworth Garden City include the A505. Sites close to Letchworth Garden City are covered too, including Letchworth (1 mile east), Willian (1 mile south), Norton (1 mile north-east), Walsworth (2 miles south-west) and Ickleford (2 miles west). A short drive away, we cover Stevenage (5 miles south-east), Welwyn Garden City (13 miles south), Harpenden (12 miles south-west), Hitchin (3 miles south-west), Hatfield (15 miles south) and Hertford (14 miles south-east).
Near you in Letchworth Garden City
Locally, jobs take us to sites close to Norton School, Three Magnets pub and Church of St Paul. There’s a railway station in Letchworth Garden City itself: Letchworth Garden City station. Well-known places in the area include Wymondley Castle (2.5 miles south) and Fairfield Hospital (1.8 miles north-west). Not far away are Purwell Ninesprings.
How the quote is worked out
A fixed quote reflects the actual work. It allows for:
- Any access equipment needed
- How much existing material needs removing
- The product specified
- Backing rod, priming and other preparation
Pricing service penetrations depends on quantities, condition and access, plus any specification you’re working to. Ask us for a fixed quote.
Before you send an enquiry
There’s no need for a formal survey. These details are enough to start:
- The site address and postcode
- Clear photos of the problem areas
- Your programme or deadline
- Approximate linear metres or a joint schedule
For a fixed quote, call the office on 01277 525 020 or email us. Our quote form is another easy route.
Common problems we fix in Letchworth Garden City
When a seal departs from its tested detail, the evidence no longer covers it. An oversized gap, too shallow a bead, missing backing or two makers’ products combined are the usual culprits.
Typical triggers for a call:
- Unsealed joints where partitions meet the slab
- Old intumescent sealant that has split away
- Non-fire-rated filler around services
- Snag lists that include open service penetrations
Workshops and IT rooms at colleges like North Hertfordshire College - Hitchin Campus (2.1 miles south-west of Letchworth Garden City) are re-serviced often, leaving penetrations to seal.
What your quote should include
- What the guarantee covers, and for how long
- Is depth set with backing rod, or bond-breaker tape in shallow joints?
- Are they CHAS accredited or on Constructionline?
- How they’ll work around occupants
Questions we’re asked in Letchworth Garden City
Do you seal service penetrations in hotels around Letchworth Garden City?
Yes. We install fire-rated and intumescent sealant where it is specified. Each seal follows the tested detail, and rooms are done in turn.
Can you work in a care home near Letchworth Garden City with residents in?
Yes. Care settings are planned area by area, at times agreed with the home. Any site rules, from signing in to infection control, are agreed before we start.
Is the work guaranteed?
Yes. The 12-month guarantee covers our preparation and application, but not damage, misuse or other trades’ work.
Who decides which product is used?
The specification comes first, if there is one. If there isn’t one, it comes down to the joint: its movement, its surfaces and what it has to cope with.
Do you work in Letchworth Garden City?
Yes. We cover Letchworth Garden City and the rest of Hertfordshire, within our coverage of Greater London, South East England and Scotland. For a quote, give us a call on 01277 525 020 or email drawings and photos.
Can you work to our specification?
Yes. The specification and the manufacturer’s installation guidance are what we work to, and any queries are raised before we start.
How do we ask for a quote?
It works in four steps: send details, receive a fixed quote, we carry out the work, and it’s guaranteed. The first step only needs photographs and a postcode.
Building owners, agents and FMs in Letchworth Garden City
We take on planned maintenance as well as one-off repairs: working through a building or an estate in stages that fit your budget. Letchworth Garden City can form part of a wider programme across Hertfordshire.
If you look after buildings for someone else, you need clear quotes and clear reporting. You get a fixed quote, an agreed scope and a walk round at the end, plus a 12-month guarantee.