Fire stopping in St Nicholas
Fire stopping in St Nicholas, backed by over 20 years in commercial sealing. Fully insured and CHAS accredited.
- Unsealed joints where partitions meet the slab
- Unsealed penetrations discovered above suspended ceilings
- Expanding foam used as fire stopping
Need fire stopping in St Nicholas?
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
Questions about St Nicholas
Can work at a site such as North Hertfordshire College - Stevenage Campus fit around teaching?
Yes. Tell us the term dates, vacation periods and access windows, and we will plan the work around them. Tell us which site documents you need, such as RAMS, our insurance certificate or CSCS details, and they’re confirmed with the quote.
Is a smaller place like St Nicholas outside your area?
No. Places such as St Nicholas are covered as much as the big towns. We work across Greater London and the South East. Where we can, we group nearby jobs to make the most of each trip.
Can one quote cover more than one building?
Yes. A group of buildings can go on one quote, and you deal with one contact throughout.
Is BS 476 being phased out?
It mainly affects England, where Approved Document B is dropping its BS 476 references from 2 September 2029. Products are then judged on BS EN 13501-2 classifications. In Scotland, the Technical Handbook sets its own guidance.
How do you choose the sealant?
Where there’s a specification, we use the product it names. Otherwise, we recommend a product to suit the joint’s movement, the substrate and the conditions, following the manufacturer’s guidance.
Do you approve fire stopping for building control?
No. Approval sits with the designer, principal designer or building control. We will confirm the product and detail installed.
Is the work guaranteed?
Yes. The 12-month guarantee covers our preparation and application, but not damage, misuse or other trades’ work.
About our fire stopping in St Nicholas
Most of our fire stopping work happens after the building is up. New cable runs, replaced pipework and extra data routes all punch holes in compartment walls. We close the openings listed on your schedule, using the specified sealant and detail. Most enquiries involve improvised or mixed-product fire seals and hidden openings found during inspections, on cable penetrations, joints between fire-resisting walls and floors and pipe penetrations. A single leaking joint is often how a building in St Nicholas 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.
Around St Nicholas, penetration and linear seals tend to be one-building jobs. With the specification and photos of the gaps, we can give a fixed quote and bring the right products.
Whoever the client is, the cover is the same: twelve months on the work we carried out. Faults in the structure, damage and other trades’ work fall outside it, and we say so plainly.
- Location
- St Nicholas (SG1, SG2)
- Wider area
- Hertfordshire
- Cover
- A 12-month guarantee
- Quote
- Quoted before any work starts
- Phone
- 01277 525 020
- Updated
- 3 November 2026
Building owners, agents and FMs in St Nicholas
Whether you’re a managing agent, a property factor or an owner’s representative: send details, get a fixed quote, we seal, guaranteed. Keys, access and contacts can be agreed in advance.
Blocks and communal areas make up much of the work for housing associations and agents. Work can be phased so residents and staff keep access throughout, and each stage is agreed with your contact.
Site staff or a sealant specialist?
Certain joints really need a specialist: fire-rated seals that must follow a tested detail, trafficked floor joints and external movement joints among them. A poor seal in places like these tends to cost more to put right later.
General builders and handymen seal joints, but it isn’t their main trade. A specialist brings correct preparation, depth control with backing rod and a product suited to that particular joint, which is what makes a joint last.
Fire-rated sealing for St Nicholas buildings
A number of hotels sit less than 2 miles from St Nicholas. In hotels, bedroom and corridor walls are typically fire-resisting, so services added in a refit need sealing with the specified product. Stevenage, one of the planned towns of the twentieth century, takes in or adjoins St Nicholas. Decades of new cabling and pipework in planned-town buildings can leave openings in compartment walls to seal with the specified product.
Colleges such as North Hertfordshire College - Stevenage Campus (2.1 miles south-west of St Nicholas) add IT and services as courses change, and each new penetration through a fire-resisting wall needs sealing with the specified product. Holiday works at schools like The Leys Primary and Nursery School often leave service openings to seal before pupils return.
St Nicholas is about 1 mile north of Stevenage, in Hertfordshire. Our applicators travel to St Nicholas for work on service penetrations. St Nicholas is one of 371 places we cover in Hertfordshire for service penetrations. There’s a separate page for London, roughly 30 miles from St Nicholas.
We cover the SG1 and SG2 postcode districts. Among the streets we cover are York Road, Ripon Road and Drury Lane. We also cover Rooks Nest (1 mile west), Pin Green (1 mile south-west), Chells (1 mile south-east), Stevenage (1 mile south) and Bedwell (1 mile south-west) for service penetrations. Nearby towns on our patch include St Albans (14 miles south-west), Bishop's Stortford (15 miles east), Welwyn Garden City (9 miles south), Harpenden (10 miles south-west), Hitchin (4 miles north-west) and Hoddesdon (14 miles south-east).
Near you in St Nicholas
Locally, jobs take us to sites close to Church of Saint Nicholas and The Nobel School. The closest station to St Nicholas is Stevenage station, about 2 miles south-west of the centre. A little further out are Wymondley Castle (2.7 miles north-west) and Stevenage Museum (1.8 miles south-west). For a walk, there’s Pryor's Wood.
Why deal with it now?
A seal that doesn’t match its tested detail gives false comfort. The fix is to remove it and reinstall to the detail, and doing it once, properly, is cheaper. For buildings in places like St Nicholas, one well-planned visit beats several small ones, so it’s worth dealing with every failing joint at once.
There’s no price list, since every building and every scope is different. Call for a quote.
Why us?
- Fully insured, including public liability cover
- CHAS accredited
- Specification-led, product-correct work
- Constructionline member for supplier checks
Read what affects the cost and our accreditations.
Other services in St Nicholas
How the job changes by surface
Plastic pipes
In a fire, plastic pipework melts away and leaves an opening. Small sizes are sometimes covered by an intumescent sealant detail, but many need a collar or wrap. We confirm material and size first and tell you if sealant isn’t the right product.
Linear joints
Joints at the top of partitions may need to move as the slab above deflects. We use the product and backing the detail names for that movement, along the full length of the run.
Our process
A typical day starts with protection: masking tape along the joint edges and sheeting over anything nearby. On site, the work normally takes a single visit for a short list of penetrations, or a phased programme for a whole building, and we clear our waste as we work. If neighbouring businesses or buildings around St Nicholas need work too, visits can be combined. Mention the building’s opening times and we’ll work within them.
- We start with your penetration schedule, drawings or specification.
- We plan the sequence of floors, risers and voids with you.
- Each opening is checked for wall or floor type, service, gap and depth.
- Foam, ordinary sealant and debris come out.
- Backing and fire-rated sealant are installed to the detail and tooled.
- Anything outside the detail is reported to you rather than sealed.
Preparing the site
- Tell us what induction or permit system the site runs
- Move anything stored against the joints
- Tell us your opening times and when work is allowed
Ask for a quote
Specifications, drawings and tender packages are welcome with any enquiry, and we will price the work to it. Smaller jobs need nothing more than photos and a few notes.
Advice
Common problems we fix in St Nicholas
When a seal departs from its tested detail, the evidence no longer covers it. Gaps beyond the tested size, shallow sealant, no backing where it was needed, or products from different systems mixed together are what we find most often.
Clients normally get in touch after noticing something like this:
- Penetration schedules that need working through
- Open linear gaps along the top of fire-resisting walls
- Openings left by services added after handover
- Old intumescent sealant that has split away
For a building such as All Saints Church, new heating or data runs are the usual reason penetrations need sealing.
Before you book anyone
- How they handle RAMS and site documents
- Can the work be phased to keep areas open?
- Proof of insurance
- How the existing material will be dealt with