Why the SIPit‑FR Panel Is Changing How We Build Fire‑Rated Walls in the UK

In the UK, fire‑rated external walls are becoming more complex, more regulated, and more expensive to build. Whether it’s a holiday lodge, a commercial unit, a school, or a multi‑storey car park, the requirement for robust, tested, and certifiable fire performance is no longer optional — it’s fundamental.

This is exactly where the SIPit‑FR panel stands apart.

A Stand‑Alone Structural Panel — Tested on Both Sides

SIPit‑FR is the only polyurethane‑core SIP panel in the UK that has been BS EN 1365‑1 tested on both sides, achieving a full REI 60/60/60 structural fire rating.

Unlike many systems that rely on a build‑up of layers to achieve compliance, SIPit‑FR is a complete structural element on its own. It doesn’t need additional linings, boards, or complex assemblies to perform.

It is a single, certified, structural, insulated fire‑rated panel.

Works Independently — or Complements Any Structural System

One of the biggest advantages of SIPit‑FR is its versatility. It can be used as:

• A fully independent structural wall, requiring no supporting frame

• An external fire‑rated skin installed outside another structure

• Infill fire‑rated panels within a primary frame

This makes it compatible with:

• Steel frame buildings — industrial units, farm buildings, retail units, shopping centres

• Concrete structures — lift shafts, hotels, multi‑storey car parks

• Timber frame and mass timber buildings — schools, community buildings, residential blocks

Wherever a fire‑rated wall is required, SIPit‑FR can either replace the traditional build‑up or simplify it dramatically.

Why This Matters for Holiday Lodges and Commercial Builds

Holiday lodges, glamping pods, and small commercial buildings often sit close to boundaries. That means:

• Boundary distances are tight

• 1‑hour fire‑rated walls are required

• Cladding choices become restricted

Traditionally, achieving this means:

• Multiple layers

• Ventilated cavities

• Cavity barriers

• A1‑rated cladding

• Increased cost and complexity

SIPit‑FR removes almost all of that.

A1 Non‑Combustible Facing = More Cladding Freedom

Because SIPit‑FR has A1‑rated CMC facings, the external wall no longer relies on the cladding to achieve fire performance.

This means:

• You do not need A1 cladding

• You can use a wide range of finishes

• You avoid expensive ventilated cavity barriers

• You simplify the entire wall build‑up

And yes — timber cladding treated with a fire‑rated coating can be used, because the fire performance is delivered by the panel, not the cladding. The cladding becomes decorative, not structural or fire‑critical.

Cork Spray Render — Direct Application, No Cavity

Another major advantage is the ability to apply breathable cork spray render directly onto the outer face of the SIPit‑FR panel.

No:

• Ventilated cavity

• Battens

• Fire‑stopping cavity barriers

• Multi‑layer build‑ups

Just a direct‑applied, breathable, flexible, eco‑friendly finish that keeps the wall simple, fast, and compliant.

Faster Build Times, Lower Costs, Higher Compliance

By replacing a multi‑layer fire‑rated wall with a single certified panel, SIPit‑FR delivers:

• Faster installation

• Fewer trades

• Lower material costs

• Reduced design liability

• Clear, traceable fire certification

• A simpler, safer construction process

For developers, architects, and contractors, this is a rare combination: higher performance with lower complexity.

As fire regulations tighten and clients demand faster, greener, more compliant solutions, the industry needs products that remove complexity — not add to it.

SIPit‑FR does exactly that.

It is a stand‑alone structural fire‑rated panel, tested on both sides, compatible with every major structural system, and capable of delivering a fully compliant fire‑rated wall without the traditional build‑up.

For holiday lodges, commercial units, schools, hotels, and industrial buildings, it represents a step change in how we approach fire‑rated construction in the UK.