Daw's End fire stopping
Commercial sealant work in Daw's End for contractors, FMs and building owners: fire-rated and intumescent sealing of service penetrations and linear gaps, quoted at a fixed price.
- Fire stopping installed outside its tested range
- Damaged fire seals in risers and voids
- Unsealed openings around new pipes and cables
Fire stopping across Daw's End
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 Daw's End
Fire-rated sealant suits many small service penetrations: copper and steel pipes, cables and some small ducts where the tested detail allows. Larger openings and some plastic pipes call for collars, wraps, batts or boards instead. If the detail calls for something other than sealant, we say so rather than force sealant into it. Site teams most often ask us about non-fire-rated filler around services and improvised or mixed-product fire seals, across joints between fire-resisting walls and floors, linear gaps at wall heads and cable penetrations. A single leaking joint is often how a building in Daw's End first comes to us: we check the joints around it and give you an honest view of what needs doing now and what can wait.
Barn and farm-building conversions near places like Daw's End often combine new partitions with old walls. A penetration seal only performs as tested if product, substrate, service, gap and depth all match the detail.
We sign every job off with a 12-month guarantee. The promise is simple: if our work fails within that year, we put it right.
- Where
- Daw's End (SG9)
- Wider area
- Hertfordshire
- Cover
- 12 months on our workmanship
- Quote
- A fixed quote before we start
- Telephone
- 01277 525 020
- Page updated
- 3 November 2026
What the job involves on each surface
Small ducts
Some fire-rated sealant details cover small ducts. Larger or fire-rated ductwork normally needs a different solution set by the designer.
Drylining partitions
Holes in board are often cut larger than needed. If the gap exceeds the tested range, sealant alone won’t do and we’ll tell you what the detail says instead.
Fire stopping around Daw's End: how the place shapes the job
For England, the fire stopping of penetrations is dealt with in Approved Document B. Its BS 476 references are being withdrawn from 2 September 2029, with BS EN 13501-2 classification taking over, subject to transitional arrangements. Our part stays the same: the specified product, installed to its tested detail. At about 33 miles from central London, Daw's End is within reach of the capital. Business park offices in the commuter belt are refitted as tenants change, and each fit-out adds services through compartment walls.
Older community buildings such as Church of St George that have been rewired or given new heating can have service gaps through walls worth checking against the specification. Industrial units on estates such as Bell Farm Industrial Park, 1.6 miles north of Daw's End, often separate offices from warehouse space with fire-resisting walls, and new services through them need the specified seal.
Daw's End is in Hertfordshire. Daw's End sits inside our coverage and the rest of Hertfordshire, with the same fixed quotes and 12-month guarantee as everywhere else. Daw's End is one of 371 places in Hertfordshire on our list for service penetrations. We also cover London, some 33 miles away.
Commercial sites across SG9 are covered. Sites close to Daw's End are covered too, including Anstey (1 mile north), Great Hormead (1 mile south), Wyddial (2 miles west), Brent Pelham (2 miles south-east) and Lower Green (2 miles north-east). Further afield, our area takes in Stevenage (11 miles south-west), Bishop's Stortford (9 miles south-east), Hitchin (13 miles west), Hoddesdon (15 miles south), Hertford (13 miles south-west) and Letchworth (11 miles west).
Near you in Daw's End
Locally, jobs take us to sites close to The Blind Fiddler pub, among other places. Other landmarks nearby include Anstey Hales Farm (0.6 miles north-east). Open spaces near Daw's End include Hawkins Wood.
Towns and villages near Daw's End
What else we do in Daw's End
Do you need fire stopping in Daw's End?
Linear gaps fail where a fire-resisting wall meets a slab, soffit or another wall. Deflection and building movement can open these gaps, and a product not tested for that movement may crack. The tested detail for a linear joint states the width and movement it covers.
What tends to prompt an enquiry:
- Builders’ foam or ordinary silicone in compartment walls
- Hidden openings found during inspections
- Fire-rated sealant that has cracked or shrunk back
- Fire-stopping items raised at inspection or handover
Holiday works at schools like Anstey First School often leave service openings to seal before pupils return.
Questions to ask before you book
- Is the sealant right for the movement and the substrate?
- Proof of insurance
- Will RAMS and insurance details be available?
- Are they CHAS accredited or on Constructionline?
How a job runs
Our CSCS-carded applicators arrive with the sealants, primers and backing rod the job calls for. Any old material is cut back to clean, sound faces, primer goes on where the manufacturer specifies it, and each bead is tooled to a neat concave finish. For work around Daw's End, we aim to finish in one visit, so photos and measurements up front really help. That way the right products come on the day.
- We read the specification, drawings or penetration schedule you send and ask about anything unclear.
- 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.
- Openings that need a collar, wrap, batt or other product are flagged to you rather than filled with sealant.
Before we start on site
- For older buildings, check the asbestos register before work
- Tell us what induction or permit system the site runs
- Share your working hours and any access restrictions
Getting a fixed quote
The quickest route to a quote is a few photographs and the site postcode. Upload them with the quote form, or call the office on 01277 525 020 or email drawings and photos to discuss it first.
Related advice
What affects the price in Daw's End
These are the things that shape the price:
- Working within restricted access windows
- Travel to remote or island sites
- How much there is to seal
- Specialist products, such as fire-rated or hygienic sealants
A quote for service penetrations depends on how many there are, their condition and the access, plus any specification you’re working to. Call for a quote.
Before you send an enquiry
There’s no need for a formal survey. A few details are enough to get going:
- The postcode of the building
- Anything awkward about access or site hours
- Asbestos survey details if the building is older
- When you need the work done
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.
Your questions answered
Will you take on work at estates like Bell Farm Industrial Park, close to Daw's End?
Yes. We cover Daw's End and the area around it, including industrial estates, business parks and retail parks such as Bell Farm Industrial Park. A few photographs and the unit address let us price the work.
How does the move away from BS 476 affect penetration seals in Daw's End?
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. Whichever applies, we install the specified product to its tested detail; the specification is for the designer to set.
What happens if old sealant might contain asbestos?
Asbestos is possible in some older mastics, particularly in buildings from before 2000. We check the asbestos register before cutting out old sealant in an older building, and if asbestos is suspected, work stops until it’s tested. Removing asbestos is a job for asbestos specialists, not us.
When can you be on site?
The office is staffed Monday to Friday, from 8am until 5pm. Tell us your site hours and access windows and the work will be fitted around them.
Can you work to our specification?
Yes. Send it with your enquiry, and the quote will be based on it, flagging anything that needs clarifying.
Are your applicators CSCS-carded?
Yes. Should the site need card details in advance, let us know and we’ll send them with the quote.
Are you insured?
Yes. Our insurance certificate can be sent alongside the quote.
Doing it in-house
Certain joints really need a specialist: fire-rated seals that must follow a tested detail, trafficked floor joints and external movement joints among them. Getting these wrong typically costs more in the end than doing them right.
For most general trades, sealant is a sideline. A specialist prepares properly, controls joint depth and picks a product with the right movement class.
What we can’t put right
We seal joints; we don’t mend everything behind them. Sealant alone won’t deal with:
- Gaps in walls that were never built as compartment walls
- Deciding what a wall or floor needs, which belongs to the designer
- Issuing fire ratings or certificates for seals
If in doubt, ring 01277 525 020 or email drawings and photos and we will say what we think before you book.
Joints and surfaces we work on
- Cable penetrations
- Linear gaps at wall heads
- Small duct penetrations where the tested detail allows
- Pipe penetrations
- Joints between fire-resisting walls and floors
- Service gaps in risers