Carpentier - Smart wood for nice places

Pyroclip – Class B reaction to fire with concealed fixing

27/07/2026

Open-joint timber cladding is particularly popular among architects and construction professionals right now. Open profiles are highly sought after for contemporary façades because of their neat patterns, natural appearance and the architectural freedom they offer. At the same time, reaction to fire requirements are becoming increasingly stringent, particularly for projects requiring class B.

Until recently, this often meant making compromises. Anyone opting for Class B reaction to fire open-joint timber cladding generally had to accept visible fixings. With Pyroclip, Carpentier is now taking another major step forward: Class B reaction to fire open-joint timber cladding with a hidden fixing system. An absolute first in timber cladding!


A certified solution for open-joint QuickClip® cladding

Pyroclip is a certified clip that enables open-joint cladding to be installed quickly and efficiently, without visible screws or nails. Developed in collaboration with Grad®, the clip is designed for applications that need to look attractive, be easy to install and offer fire resistance.

Carpentier thus combines the architectural appeal of an open-joint timber façade with the technical assurance of a certified cladding system. The result is a sleek, high-quality façade finish that meets Class B reaction to fire requirements without compromising on style.


Class B reaction to fire in HOTwood pine with a fire-retardant treatment

The QuickClip® Fine line, Plus line and Cubus profiles in HOTwood pine are available with fire certification and meet Class B-s2,d0 reaction to fire standards when treated with a fire retardant and installed using Pyroclip.

These profiles thus provide a solution for projects requiring Class B reaction to fire standards without limiting architectural freedom. The open joints create an attractive pattern across the façade, while the concealed fixing system ensures a sleek and uniform result without visible screws or nails. At the same time, the warm appearance of thermo pine is preserved, while the Grad® fixing system ensures fast installation.


Innovation without compromise

With Pyroclip, Carpentier once again confirms its role as an innovative partner in timber cladding. This certified solution brings together technical performance, sustainability and design in a single cladding system for projects requiring Class B reaction to fire.

LOOKING FOR OPEN-JOINT TIMBER CLADDING WITH CLASS B REACTION TO FIRE AND CONCEALED FIXING?

Our timber experts will be happy to help you choose the right certified solution for your project. Consult our decision tree or contact us for bespoke advice.