J.W. Simpkin Ltd

30/10/2026

Intumescent coating performance has to be measured.

Application conditions, curing and dry film thickness all affect whether the installed system matches its specification. Visual appearance alone cannot provide that evidence.

This guide explains how humidity, temperature and DFT are controlled and recorded:

https://www.jwsimpkinltd.co.uk/controlling-humidity-temperature-dft-in-on-site-intumescent-application/?utm_source=facebook&utm_medium=organic_social&utm_campaign=jws_pfp_authority_q4_2026&utm_content=intumescent_dft_control

For structural steel protection enquiries, call J.W. Simpkin on 01332 664700.

28/10/2026

Some cavities need to remain ventilated in normal use. Others need to be closed continuously.

That is why open-state and closed-state cavity barriers are not interchangeable. Selection and installation must follow the fire strategy, cavity function and tested system.

Read the guide:

https://www.jwsimpkinltd.co.uk/open-state-vs-closed-state-barriers-understanding-the-difference-in-cavity-barrier-design/?utm_source=facebook&utm_medium=organic_social&utm_campaign=jws_pfp_authority_q4_2026&utm_content=open_vs_closed_cavity_barriers

26/10/2026

A stated fire-resistance period is not enough to define a buildable detail.

The substrate, opening, services, dimensions, orientation and tested system all need to match the real site condition.

Our guide explains what contractors and project teams should check before installation begins:

https://www.jwsimpkinltd.co.uk/how-to-read-a-fire-protection-specification-without-missing-the-critical-detail/?utm_source=facebook&utm_medium=organic_social&utm_campaign=jws_pfp_authority_q4_2026&utm_content=reading_fire_specifications

Fire protection specifications contain more than resistance periods and product names. Learn how contractors should check substrates, test evidence, system limitations, drawings and site conditions before installation begins.

14/10/2026

Third-party certification should be more than a badge.

It gives clients independent evidence about tested systems, competent installation and the records behind work that may soon be hidden from view.

Our latest guide explains why product evidence, installer accreditation, inspection and photographs all need to work together:

https://www.jwsimpkinltd.co.uk/third-party-accreditation-and-fire-testing-why-certified-systems-count/?utm_source=facebook&utm_medium=organic_social&utm_campaign=jws_pfp_authority_q4_2026&utm_content=third_party_accreditation

J.W. Simpkin provides accredited passive fire protection services across the UK. For project enquiries, call 01332 664700 or email [email protected].

A detailed study of third-party accreditation and fire testing in passive fire protection. Examines why certified systems alone can be trusted to perform under fire and meet UK regulatory duty.

12/10/2026

A fire door is more than the door leaf.

Gaps, seals, hinges, closers, glazing, the frame and later alterations all affect whether the complete doorset can perform as intended.

Our latest practical guide explains the common details that can undermine a fire door before it ever encounters fire:

https://www.jwsimpkinltd.co.uk/why-fire-doors-fail-before-they-burn-fire-door-inspection-and-compliance/?utm_source=facebook&utm_medium=organic_social&utm_campaign=jws_pfp_authority_q4_2026&utm_content=fire_door_failures

If you are responsible for a commercial or residential building and need advice on fire doors, contact J.W. Simpkin on 01332 664700.

08/10/2026

A fire-rated product does not automatically create a compliant fire-protection system.

Performance depends on the complete tested arrangement—including the substrate, opening, fixings, service type and installation method. A convenient substitution or an unrecorded site change can take the work outside the supporting evidence.

This short guide explains why passive fire protection must be considered as a complete system, from specification through to installation and inspection:

https://www.jwsimpkinltd.co.uk/the-difference-between-product-compliance-and-system-compliance-in-passive-fire-protection/?utm_source=facebook&utm_medium=organic_social&utm_campaign=jws_pfp_authority_q4_2026&utm_content=product_vs_system_compliance

Need help reviewing a passive fire protection detail? Call J.W. Simpkin on 01332 664700 or email [email protected].

02/10/2026

Plan Passive Fire Protection Before M&E Installation Begins

By the time pipes, ducts and cable trays are fully installed, the space left for passive fire protection can become awkward, restricted and difficult to inspect.

Our article looks at why compartment lines, service routes, pe*******on sizes, access and sequencing should be coordinated before M&E installation begins, reducing remedial work and helping the final installation stay within the tested system.

Read the full article here:
https://www.jwsimpkinltd.co.uk/how-to-plan-passive-fire-protection-before-me-installation-begins

Planning passive fire protection before M&E installation reduces rework, protects compartmentation and avoids inaccessible service pe*******ons. Learn how principal contractors can coordinate fire stopping, access, sequencing and evidence before services are installed.

30/09/2026

Fire Protection in Riser Shafts

Riser shafts carry services vertically through a building, which means poor compartmentation can also give smoke and flame a direct route between floors.

Our article looks at why risers need careful fire stopping, continuous compartmentation, controlled service pe*******ons, reliable access doors and clear inspection records throughout construction and maintenance.

Read the full article here:
https://www.jwsimpkinltd.co.uk/fire-protection-in-riser-shafts-controlling-vertical-smoke-and-flame-spread/

Riser shafts can allow smoke and flame to travel rapidly between floors. Learn how compartmentation, service pe*******ons, access, inspection and clear records protect these critical vertical routes.

28/09/2026

What Architects Need to Know About Fire Boarding Details

Fire boarding is more than a board thickness and a line around a steel section. Fixings, joints, corners, access, tested encasement details and finish tolerances all affect whether the system can be installed as intended.

Our article looks at the details architects need to consider early, so the protection remains buildable, inspectable and aligned with the tested system on site.

Read the full article here:
https://www.jwsimpkinltd.co.uk/what-architects-need-to-know-about-fire-boarding-details/

24/09/2026

Protecting Structural Steel in Occupied Buildings

Applying intumescent protection in a live building brings a different set of demands. Access may be restricted, existing coatings may need investigation, surrounding finishes need protection, and curing conditions still have to meet the system requirements.

Our article looks at how on-site structural steel protection should be planned, applied, measured and recorded without compromising the building’s fire performance or day-to-day use.

Read the full article here:
https://www.jwsimpkinltd.co.uk/fire-protection-for-structural-steel-in-occupied-buildings/

On-site intumescent protection in occupied buildings requires careful access, surface preparation, curing control and protection of surrounding finishes. Learn how structural steel can be protected without compromising safety, quality or building use.