Fire Stopping in Holwell
Our CSCS-carded applicators take on fire-rated and intumescent sealing of service penetrations and linear gaps in Holwell. Send photos or drawings for a fixed quote.
- Old intumescent sealant that has split away
- Unsealed openings around new pipes and cables
- Penetration schedules that need working through
Fire stopping for businesses in Holwell
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
Fire stopping for commercial buildings in Holwell
No fire sealant works on its own: the evidence covers a specific product, wall or floor type, service, gap, depth and backing. Before we seal anything, we check the opening against the detail it is meant to follow, and raise it with you if it falls outside. Site teams most often ask us about unsealed penetrations discovered above suspended ceilings and improvised or mixed-product fire seals, on small duct penetrations where the tested detail allows, joints between fire-resisting walls and floors and cable penetrations. One point of contact handles commercial sealant work in Holwell from the first photographs to the final walk-round, for single jobs and planned programmes alike.
Rural conversions around Holwell can put new fire-resisting partitions inside older structures. Where a pipe or cable passes through a fire-resisting wall, the seal must match the tested detail: product, substrate, gap and depth.
We stand behind the joints we seal: 12 months, guaranteed. That covers our preparation and application, and if something we did falls short, we return to it.
- Location
- Holwell (SG5)
- Region
- Hertfordshire
- Cover
- 12 months on our workmanship
- Quotes
- Fixed quote, scope in writing
- Call
- 01277 525 020
- Last updated
- 3 November 2026
Why act early in Holwell
The longer openings stay, the more there tend to be: every new cable or pipe adds another. Keeping on top of it after each round of works keeps the job small, rather than turning into a full building survey and reseal. Around Holwell, it’s better to renew all the failing joints at once, rather than one at a time. Photos of every joint help us quote for the whole job.
Whether it’s a single area or a whole estate, the same things set the price: 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.
Why clients in Holwell choose us
- Products installed to the manufacturer’s instructions
- Over 20 years of commercial sealing
- Clear, fixed quotes
- One number for every site we cover
Read how commercial sealant jobs are priced and our accreditations and insurance.
FAQs: Holwell
How does the removal of BS 476 from Approved Document B affect fire-rated sealing in Holwell?
From 2 September 2029, Approved Document B drops its BS 476 references in favour of BS EN 13501-2 classification, with transitional arrangements. Our part doesn’t change: the specified product, to its tested detail.
Will you plan work around the academic year at somewhere like University of Bedfordshire?
Yes. Tell us the term dates, vacation periods and access windows, and we’ll plan the work around them. We’re CHAS accredited and a Constructionline member, and paperwork such as RAMS is confirmed with the quote.
Will you just go over the old sealant?
No. We cut the old material out and clean the joint back before sealing, because fresh silicone will not bond with aged silicone.
Is colour matching possible?
In many cases, yes. Many products come in a range of standard colours, and matching to RAL references or surrounding finishes is often possible. We’ll confirm the colours available for the specified product.
Does the weather affect the 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.
How long do sealant joints last?
There’s no fixed lifespan: movement, exposure, cleaning, traffic and the product all play a part. Treat them as maintenance items and inspect them regularly.
How much does the work cost?
That depends on the job: the volume of work, the access, the specified product and how it’s phased. Call for a quote and we will price it properly.
Commercial clients in Holwell
Planned maintenance programmes are welcome: working through a building or an estate in stages that fit your budget. Holwell can form part of a wider programme across Hertfordshire.
We work for building owners and managing agents on sealant work across single buildings or whole portfolios around Holwell. Several sites can go on one quote, so there’s one set of paperwork to deal with.
How the quote is worked out
Sealant work doesn’t have a standard rate, since sites vary so much. What we look at:
- Distance, for remote addresses
- Phasing around occupants
- Backing rod, priming and other preparation
- Quantities, in metres or numbers
The price depends on how many linear metres there are, how much old material needs removing and the access. Call for a fixed quote when you are ready.
What we need to price the job
For an accurate fixed quote, we need to understand the site. Send us:
- Whether the building will be occupied during the work
- Specification clauses that apply
- Any dates the work must fit around
- Anything awkward about access or site hours
Send details, get a quote, we seal, guaranteed: that’s how every job runs. The first step is to give us a call on 01277 525 020 or send photos by email with what you know.
Also near Holwell
Also in Holwell
On site: what to expect
Site rules come first: sign-in, induction and whatever permit system the building uses. With the paperwork done, the joints are worked through in the order agreed with your site contact. Smaller jobs around Holwell can be grouped with others nearby. A fixed quote is given before anything starts.
- We read the specification, drawings or penetration schedule you send.
- Every penetration is compared with its detail: wall or floor type, service, gap size and depth.
- Anything that doesn’t belong in the opening, such as expanding foam or general-purpose filler, is removed.
- We fit the backing the detail asks for, to the stated depth.
- 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
- Warn occupants and staff about the work
- Explain the parking and delivery arrangements
- Tell us which areas need to stay in use
Request a quote
If there’s a specification, drawings or a tender package, send it with your enquiry, and we will price against exactly what is specified. Smaller jobs need nothing more than photos and a few notes.
Read more
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.
The visible bead is only part of the job. Correct depth, the right primer and a sealant matched to the movement are where general trades tend to cut corners.
Honest limits
Our job is the joint, not everything around it. Sealant alone won’t deal with:
- Signing off or certifying a building’s fire stopping
- Large openings beyond what any sealant detail covers
- Walls or floors that aren’t fire-resisting to begin with
Not sure which it is? You can give us a call on 01277 525 020 or send photos by email and we will tell you honestly.
What we seal
- Cable penetrations
- Pipe penetrations
- Linear gaps at wall heads
- Small duct penetrations where the tested detail allows
- Service gaps in risers
- Joints between fire-resisting walls and floors
Fire stopping in Holwell: the local picture
Approved Document B is the English guidance that covers fire stopping around openings and penetrations. References to the older BS 476 classes are being removed from it from 2 September 2029, after which the European classification, BS EN 13501-2, is the route, subject to transitional arrangements. What we install is set by the specification, and it goes in to the tested detail. At about 35 miles from central London, Holwell is within reach of the capital. Offices around the capital are refitted often, and the cabling that follows can breach fire-resisting walls.
Campus buildings at universities such as University of Bedfordshire (to the west of Holwell) see constant changes to data and services, and fire-rated sealant goes in around new penetrations where it is specified. At a college such as North Hertfordshire College - Hitchin Campus (2.9 miles south-east of Holwell), checking penetration seals after summer M&E works is good practice. Older community buildings such as Church of St Peter (C of E) at Corner with Holwell Road that have been rewired or given new heating can have service gaps through walls worth checking against the specification.
Holwell is about 3 miles north-west of Hitchin, in Hertfordshire. Businesses, contractors and managing agents in Holwell can call on us for service penetrations. Our Hertfordshire coverage takes in 371 places, large and small. There’s a separate page for London, about 35 miles away.
Commercial sites across SG5 are covered for service penetrations. For a building on Gurney's Lane, Pirton Road and Rand's Meadow or nearby, send details and we will quote for service penetrations. Sites close to Holwell are covered too, including Pirton (2 miles south-west), Shillington (3 miles west), Apsley End (3 miles west), Hanscombe End (3 miles west) and Pegsdon (3 miles south-west). Further afield, our area takes in Stevenage (7 miles south-east), Welwyn Garden City (14 miles south), Harpenden (12 miles south), Hitchin (3 miles south-east), Letchworth (3 miles east) and Letchworth Garden City (3 miles east).
Local landmarks in Holwell
The nearest railway station is Hitchin station, roughly 2.8 miles south-east of the centre. Nearby you’ll also find Wymondley Castle (4.3 miles south-east) and Fairfield Hospital (2.7 miles north-east). Not far away are Markham's Hill and Oughtonhead Nature Reserve.