Fire-rated sealing and fire stopping in Westwick Row, Hertfordshire
Work needed on a service penetration in Westwick Row? We look at it, seal it with the right product and hand it over with a 12-month guarantee.
- Head-of-wall gaps with no fire seal
- Fire sealant pulled out of the opening
- Fire stopping installed outside its tested range
Fire stopping near Westwick Row
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
How we handle fire stopping in Westwick Row
Facilities managers in Westwick Row often find open service penetrations when ceilings come down for other work. Where the walls and floors already have a fire-stopping specification, we can work to it, matching the product and detail it names. With no specification in place, the first step sits with your designer or fire engineer, not with us. Most enquiries involve unsealed openings around new pipes and cables and seals disturbed by maintenance and left open, on small duct penetrations where the tested detail allows, cable penetrations and linear gaps at wall heads. Whoever orders the work in Westwick Row, the brief is usually the same: a fixed quote, no surprises on site and a 12-month guarantee behind the result.
Barn and farm-building conversions near places like Westwick Row often combine new partitions with old walls. Where a pipe or cable passes through a fire-resisting wall, the seal must match the tested detail: product, substrate, gap and depth.
Guaranteed is the last step of every job. You get a 12-month guarantee on our workmanship, and we explain exactly what that covers when we quote.
- Where
- Westwick Row (HP2, HP3)
- Wider area
- Hertfordshire
- Guarantee
- 12 months on our workmanship
- Quote
- Quoted before any work starts
- Call
- 01277 525 020
- Updated
- 3 November 2026
Fire stopping in Westwick Row: the local picture
At about 22 miles from central London, Westwick Row is within reach of the capital. Tenant changes on commuter-belt business parks mean regular fit-outs, and new services through compartment walls, and the gaps need sealing with the specified product. Westwick Row sits in or beside Hemel Hempstead, a twentieth-century planned town. Older buildings in planned towns have often been re-serviced several times, so penetrations left behind should be sealed with the specified product.
On estates like Saracen Industrial Estate, 1.2 miles to the north-west of Westwick Row, the wall between office and warehouse is often fire-resisting, and cables through it need the specified seal. Workshops and IT rooms at colleges like West Herts College, 2.3 miles to the west of Westwick Row, are re-serviced often, leaving penetrations to seal.
Westwick Row is about 2 miles east of Hemel Hempstead, in Hertfordshire. Any commercial site in Westwick Row is covered, whether it’s a single job or part of a planned programme. Westwick Row is one of 371 places in Hertfordshire on our list for service penetrations. London is covered too, around 22 miles from Westwick Row.
Work on service penetrations is covered throughout HP2 and HP3, for business premises of every kind. Among the streets we cover are Pancake Lane, Delmar Avenue and Farm End. If your building is just outside Westwick Row, we cover Leverstock Green (1 mile west), Bennetts End (1 mile west), Pimlico (1 mile south), Adeyfield (1 mile west) and Hemel Hempstead (2 miles west). Nearby towns on our patch include Watford (6 miles south), Stevenage (15 miles north-east), St Albans (4 miles east), Welwyn Garden City (10 miles east), Harpenden (6 miles north-east) and Hitchin (15 miles north-east).
Landmarks near Westwick Row
In Westwick Row, that means premises near Longdean School and the streets around them. The nearest railway station is Apsley station, roughly 2.1 miles south-west of the centre. A little further out are Village Arcade St Albans (3.4 miles east) and Hemel Hempstead Hospital (2.1 miles west). For a walk, there’s Verulamium Lake and Long Deans.
Places near Westwick Row
More services for Westwick Row
Westwick Row: questions and answers
Will you take on work at estates like Saracen Industrial Estate, close to Westwick Row?
Yes. Estates, retail parks and business parks around Westwick Row, Saracen Industrial Estate among them, are all within reach. A few photos and the unit address let us price the work.
How does the removal of BS 476 from Approved Document B affect fire-rated sealing in Westwick Row?
References to BS 476 classes are being removed from Approved Document B from 2 September 2029, after which BS EN 13501-2 classification is the route, subject to transitional arrangements. Our part doesn’t change: the specified product, to its tested detail.
Are your applicators CSCS-carded?
Yes. Should the site need card details in advance, tell us and we’ll confirm them with the quote.
Is it fine to apply new sealant on top of old?
No. Failed sealant is removed and the faces cleaned back to sound, dry material first, since fresh sealant will not bond reliably to aged material.
Does weather matter for sealant work?
For external joints, yes. Sealant needs a dry joint and a temperature within the product’s range, so damp, frosty or very cold days can stop external work. Internal work is rarely affected.
Do you work to architects’ specifications?
Yes. Include it with the drawings when you ask for a quote, and we’ll price the work to it.
What will the job cost?
It depends on the job: quantities, access, the product and any phasing. Call for a fixed quote.
What the job involves on each surface
Cables and cable bundles
Single cables and small bundles are often within a fire-rated sealant’s tested detail. The detail limits bundle size and the gaps between and around cables.
Masonry and concrete
Block walls and concrete floors are common substrates for penetration seals. Dust and debris are cleared from the opening, so the sealant and any backing sit properly.
When to call us in Westwick Row
Head-of-wall joints and wall-to-wall junctions are frequent weak points. Deflection and building movement can open these gaps, and the wrong product can split as a result. Linear joint details set a width range and movement capability, and the seal has to sit within them.
What tends to prompt an enquiry:
- Fire-rated sealant that has cracked or shrunk back
- Builders’ foam or ordinary silicone in compartment walls
- Open linear gaps along the top of fire-resisting walls
- Improvised or mixed-product fire seals
Older community buildings such as Church of Holy Trinity that have been rewired or given new heating can have service gaps through walls worth checking against the specification.
What to look for in a quote
- Proof of insurance
- Whether primer will be used where the manufacturer specifies it
- Will failed sealant be removed rather than covered?
- Will CSCS-carded applicators be on site?
When it isn’t the sealant
Sealant solves a lot, but not everything, and we’re upfront when that’s the case. It won’t fix:
- Deciding what a wall or floor needs, which belongs to the designer
- Large openings beyond what any sealant detail covers
- Gaps in walls that were never built as compartment walls
If you are not sure, just ring 01277 525 020 or send details through our quote form and we will give you a straight answer before you book.
Surfaces we seal
- Small duct penetrations where the tested detail allows
- Pipe penetrations
- Joints between fire-resisting walls and floors
- Linear gaps at wall heads
- Service gaps in risers
- Cable penetrations
Maintenance after handover
For the best life from the joints:
- Check risers and ceiling voids after each round of works
- Report damaged or disturbed seals as soon as they’re spotted
- File the specified details where the next contractor can find them
- Brief every trade that openings they make must be sealed
During planned inspections, look at seals in risers, cupboards and voids. Watch for cracked sealant, new services with no seal and openings that have grown, and report them promptly.
A simple record of seal locations and products helps. It tells the next contractor exactly what to reinstate, which saves guesswork.
From enquiry to sign-off
On arrival, we report to your site contact and complete whatever induction the building runs. Everything around the joints gets protected before anything is cut or cleaned, and the work normally takes a single visit for a short list of penetrations, or a phased programme for a whole building. Jobs in and around smaller places like Westwick Row are usually planned as a single visit, so we ask for photos and rough sizes first. Then the right materials arrive with us.
- First we go through the drawings, schedule or specification for the seals and raise any questions before we price.
- On site, each opening is checked against the tested detail it is meant to follow.
- Unsuitable fillers and loose debris are taken out of each opening.
- We fit the backing the detail asks for, to the stated depth.
- We apply the specified sealant to the depth and around the services as the detail shows.
- If an opening needs something other than sealant, we tell you instead of improvising.
What we need from you
- Let building users know which areas are affected
- Send any specification or drawings in advance
- Point out any areas we must not close
Request a quote
Send us photos, drawings or a joint schedule and a fixed quote comes back to you. If the job needs a look first, we will arrange a site visit.
Related advice
Building owners, agents and FMs in Westwick Row
Whether you’re a managing agent, a property factor or an owner’s representative: send the details, accept a fixed quote, and we carry out and guarantee the work. Keys, access and contacts can be agreed in advance.
As a CHAS accredited contractor and Constructionline member, we’re straightforward to vet for your supplier list. Our insurance certificate can be sent along with the quote.