Fire Stopping in Colney Street
Fire-rated and intumescent sealing of service penetrations and linear gaps across Colney Street, carried out by CSCS-carded applicators. Fully insured and CHAS accredited.
- Openings left by services added after handover
- Builders’ foam or ordinary silicone in compartment walls
- Unsealed penetrations discovered above suspended ceilings
Fire stopping in Colney Street
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
Fire stopping in Colney Street
A lot of fire-stopping work comes after M&E installation, a refit or a tenant fit-out. New cable runs, replaced pipework and extra data routes all punch holes in compartment walls, and they are easy to forget. Those on your schedule are closed with the specified product. If you have seals disturbed by maintenance and left open and service penetrations left open after M&E works, we can put it right, whatever the surface. Whoever orders the work in Colney Street, the brief is usually the same: a clear scope, tidy work and joints that don’t fail again.
For a smaller site near Colney Street, we plan to do all the penetrations in one go, with the specification and photographs sent in advance. We install to the specification and the manufacturer’s guidance, leaving design and sign-off with the designer and building control.
Guaranteed is the last step of every job. You get a 12-month guarantee on our workmanship, and the quote explains what it covers.
- Where
- Colney Street (AL2, WD7)
- Wider area
- Hertfordshire
- Guarantee
- 12 months on our workmanship
- Quote
- Fixed quote, scope in writing
- Call
- 01277 525 020
- Page updated
- 3 November 2026
How the quote is worked out
What shapes the price:
- How much there is to seal
- Phasing around occupants
- Removal of failed or old sealant
- Specialist products, such as fire-rated or hygienic sealants
Every site prices differently: the joint sizes, the specified product, access and working hours each have a bearing. Send the details and a fixed figure follows.
Details that help us quote
There’s no need for a formal survey. A few details are enough to get going:
- Your programme or deadline
- Whether an asbestos survey exists
- Any specification or named product
- Clear photos of the problem areas
The quickest route to a quote is a few photos and the site postcode. Send them through the quote form, or ring 01277 525 020 or send photos by email if you’d rather talk the job through.
Towns and villages near Colney Street
Also in Colney Street
Site staff or a sealant specialist?
Certain joints really need a specialist: for example fire-rated seals that must match a tested detail, trafficked floor joints and external movement joints. A poor seal in places like these tends to cost more to put right later.
Paperwork matters too. Main contractors and clients often ask for CSCS cards, RAMS and insurance details, and we’ll confirm the paperwork you need with the quote.
Your questions answered
Will you take on work at estates like The Albert Bygrave Retail Park, close to Colney Street?
Yes, sites like The Albert Bygrave Retail Park are within our area, along with the rest of Colney Street. A few photographs and the unit address let us price the work.
Can you work around term dates at a campus such as University of Hertfordshire?
Yes. Education sites typically want the work in vacations or in phases during term, and we plan to suit. Tell us which site documents you need, such as RAMS, our insurance certificate or CSCS details, and they’re confirmed with the quote.
What do you charge?
Every job gets its own fixed quote. For yours, speak to us on 01277 525 020 or email a schedule or drawings.
What do BS EN 1366-3 and BS EN 13501-2 mean?
BS EN 1366-3 covers penetration seals and BS EN 1366-4 covers linear joints. Results are classified under BS EN 13501-2 as E for integrity and I for insulation, with a time such as EI 60 or EI 120. The rating applies to the product as tested.
How do you deal with asbestos in old sealant?
Asbestos is possible in some older mastics, particularly in buildings from before 2000. Before we disturb old sealant in an older building, we ask to see the asbestos register or survey, and work stops until any suspect material has been tested. Removing asbestos is a job for asbestos specialists, not us.
Do the same rules apply to fire stopping in Scotland?
Our work covers Greater London, the South East and every Scottish council area. Scotland’s non-domestic Technical Handbook, clause 2.1.14, expects service penetrations to be fire stopped to at least the wall or floor’s fire resistance, using products tested for their end use.
Can you reseal penetrations after our M&E works?
Yes, where there is a specification for those walls and floors. Openings left by new services are among the most common jobs we see and we close them with the specified product.
Commercial clients in Colney Street
Housing associations and managing agents often need work done across blocks and communal areas. We phase the work so people keep access, with each stage agreed with your site contact.
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 Colney Street can sit alongside others in a wider programme.
Keeping the joints sound
Once the work is signed off, these steps help:
- Include service cupboards in routine inspections
- Check with the data sheet before painting over fire sealant
- Get seals inspected before ceilings and boxing close
- Put resealing into every M&E and fit-out package
Never top up a fire seal with foam, ordinary silicone or filler. A repair should use the original product, installed the same way unless the designer specifies otherwise.
Looking at service areas on a regular cycle pays off. A cracked or disturbed seal found early is a small job; found late, it can be one of many.
Diagnose, treat, sign off
Tell us your site hours and access windows and we will plan around them. On the day, the work area is kept contained and tidy, and we check in with your contact before moving on to each new area. If others near Colney Street need work, visits can be combined, which keeps travel down. A fixed quote is given before anything starts.
- First we confirm the product and tested details named in the specification.
- We sort the openings by the detail each one needs.
- Improvised fillers and failed sealant are removed.
- Mineral wool or other backing is fitted where required.
- 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
- Send your site hours and access windows
- Clear stock, furniture or equipment away from the joints
Getting a fixed quote
A good quote starts with a clear picture: what’s there, how much of it, how we reach it and what’s specified. Send what you have, and we’ll arrange a site visit if anything is unclear.
Related advice
Compartments and services around Colney Street
In England, Approved Document B covers fire stopping of openings and penetrations. The national BS 476 classes are due to drop out of it from 2 September 2029, leaving the European BS EN 13501-2 route, subject to transitional arrangements. We install whatever has been specified, to the product’s tested detail. The 2 miles around Colney Street include three care or nursing homes. Care homes rely on fire-resisting walls and floors, and maintenance work that breaks through them leaves openings to seal.
Residences at universities like University of Hertfordshire (4.7 miles north-east of Colney Street) have compartment walls that must be resealed whenever services change. At a retail site such as The Albert Bygrave Retail Park, 1.8 miles to the north-east of Colney Street, walls between units may be fire-resisting, so services added in a refit need the specified seal.
Colney Street is about 3 miles south of St Albans, in Hertfordshire. Colney Street sits inside our coverage and the rest of Hertfordshire, and jobs here get the same fixed quote and 12-month guarantee as anywhere else. Our Hertfordshire coverage takes in 371 places, from busy centres to rural villages. London is covered too, some 18 miles away.
Anyone looking for fire stopping in AL2 and WD7 gets the same process as the rest of our area: send details, get a quote, we seal, guaranteed. If your site is on Old Parkbury Lane, Ventura Park and Radlett Road or close by, we can quote for service penetrations. Just outside Colney Street, we also work in Frogmore (1 mile north-west), Park Street (1 mile north-west), How Wood (1 mile north-west), Bricket Wood (2 miles west) and Chiswell Green (2 miles north-west). A short drive away, we cover Watford (4 miles south-west), Hemel Hempstead (6 miles north-west), Stevenage (15 miles north-east), St Albans (3 miles north), Welwyn Garden City (8 miles north-east) and Harpenden (8 miles north).
Around Colney Street
In Colney Street, that means premises near The George and Dragon Public House and Samuel Ryder Academy and the streets around them. The closest station to Colney Street is How Wood station, roughly 1 mile north-west of the centre. A little further out are Kingsley Green (1 mile east) and The Maltings (2.9 miles north). Not far away are Verulamium Lake and Broad Colney Lakes.
Common problems we fix in Colney Street
Most open service penetrations are left by later work. New cabling, rerouted pipework or a data route drilled through a riser can leave the hole behind. Across several fit-outs, the openings add up.
Look out for the following:
- Fire sealant pulled out of the opening
- Openings left by services added after handover
- Snag lists that include open service penetrations
- Non-fire-rated filler around services
In a school such as Park Street Church of England Voluntary Aided Primary School, fire-rated sealant goes in around service penetrations where it is specified.
What your quote should include
- Who will actually carry out the work
- Whether primer will be used where the manufacturer specifies it
- The terms of the workmanship guarantee
- Health and safety accreditation such as CHAS