Phenolic Foam Insulation Fire Rating

A product can be described as non combustible if it receives a euroclass a1 rating under bs en 13501 1.

Phenolic foam insulation fire rating.

The latest cladding system using phenolic foam board insulation with an acm system filled with a fire retardant polyethylene material has failed the large scale fire test. The first indicative test looked at the behaviour of kingspan kooltherm k15 rainscreen board a phenolic fibre free rigid thermoset material recognised as combustible. Moisture resistance phenolic foam typically has a low water vapour permeance thus it is highly resistant to the passage of water vapour and it also has very low water absorption characteristics. A non combustible product we ran a series of our own indicative iso 11925 3 tests.

Phenolic foam usually achieve a class 0 fire rating to bs476. You can watch these tests here or below. The fire performance of phenolic foam is exceptional. In order to compare the reaction to fire of a combustible product vs.

Parts 6 7 and to the new euroclass fire rating should achieve euroclass b s1 d0. Icynene is committed. Two of the materials stone wool and glass wool failed to ignite and gave consistently low yields of all of the toxic products. Non combustible products are the best option when it comes to fire rated insulation.

Icynene spray foam insulation products have the flame spread and smoke developed indexes required have been tested in accordance with and comply with the acceptance criteria of nfpa 285 and there are many wall and ceiling assemblies that contain icynene products and are fire resistance rated in accordance with astm e 119. A product with a euroclass a2 rating indicates limited combustibility which will be appended with the smoke emission and flaming droplets ratings for. The fire toxicity of six insulation materials glass wool stone wool expanded polystyrene foam phenolic foam polyurethane foam and polyisocyanurate foam was investigated under a range of fire conditions. Phenolic foam evolves exceptionally low smoke when exposed to fire and is capable of meeting or exceeding all international building regulation requirements.

Phenolic foam is a thermoset material therefore will not run melt or drip when it comes into contact with a fire source.