A blog from LAMI Doors UK... With this report, we at Lami Door seek to provide a better understanding between Lami Hygienic GRP Fire Doors and Composite GRP Fire Doors.
Reports in the construction media have discussed the performance of Composite Fire Doors, whilst placing these under the banner of ‘GRP Doors’ however, these same reports have failed to fully understand the completely different market places into which these products are supplied and the subsequent different performance criteria and construction methods that apply.
Lami Hygienic GRP Fire Doors
Lami Hygienic GRP Fire Doors together with the Lami Standard range of GRP Doors are manufactured using a pressure moulding technique. This technique produces door leaves that are totally seamless and of monocoque construction. This makes the doors 100% water resistant and non-porous which gives the product its hygienic properties and performance.
A fundamental component of the Lami Hygienic GRP Fire doors performance is its core material. This consists of a high density Hydrous Phyllosilicate Non-Organic Mineral board which has outstanding fire defence capabilities. This is further enhanced when used with expanding intumescent material which is located around the full perimeter of all Lami Hygienic GRP Fire door leaves.
Industrial grade ironmongery forms the final part of the construction of Lami Hygienic GRP Fire Doors including an increased number of heavy duty stainless steel hinges to that fitted on Standard Lami doors and a door closer with a minimum power size of EN 2-5 fitted on all fire doors.
This together with numerous years of research and development gives Lami Doors Certification of products tested to BS EN 1634-1:2008 as well as BS 476: Part 22. Lami Doors are certified with fire resistance of F30 to F120 construction.
Composite GRP Fire Doors
Composite GRP doors and Composite GRP Fire doors are becoming a widely used in the domestic sector largely due to their low maintenance requirements, following installation.
The construction of Composite GRP Fire Doors are very different to Lami Hygienic GRP Fire Doors. Composite Fire Doors generally comprise of a timber sub-frame, an Agrifiber Panel core (a composite panel made from recovered agricultural waste fibre from sources including cereal straw, bagasse, sunflower husk, walnut shells, and agricultural pruning) and a GRP facing placed in a ‘sandwich’ manner on both sides. The GRP facing provides the aesthetics of the door since it can be moulded to give the appearance and texture of a traditional timber door. It can also be manufactured in several colours.
Composite GRP Fire Doors are usually tested under BS 476: Part 22 to a maximum of 30 mins since no higher performance is required in the domestic sector. The common points of failure of these doors types in fire situations are the glazing, letterboxes and around the frame (threshold seals and the like).