For example, a 4x8 polyisocyanurate board from Johns Manville costs about $26, so you can measure the square footage of your exterior walls to get an idea of how much the materials will cost.

When these products burn without enough air, the toxicity is even greater. PIR (polyisocyanurate) is based on polyurethane, and gives off hydrogen cyanide and carbon monoxide when burning.

When these products burn without enough air, the toxicity is even greater. PIR (polyisocyanurate) is based on polyurethane, and gives off hydrogen cyanide and carbon monoxide when burning.

The insulation mostly used was RS5000, a polyisocyanurate foam made by Celotex (which releases toxic gas when it burns), with some made by Kingspan. Because of all this, "compartmentation" – the ...

The greatest toxic hazard in almost all fires is due to carbon monoxide," he said, "There is no evidence to suggest that PIR (rigid polyisocyanurate) presents any special hazard in terms of toxicity.

Dr Phylaktou believes the configuration of the cladding and the foam - known as polyisocyanurate (PIR) - was "optimum for vertical fire spread". "This explains the speed of the fire propagation.

FOAM BOARD OR RIGID FOAM INSULATION Foam board or rigid foam made from materials like polystyrene, polyisocyanurate, or polyurethane, are renowned for their high heat resistance. It’s versatile, ...

With the temperature dropping, many homeowners may be thinking about how they can keep their homes warm and cosy, and some of that goes back to their home’s insulation. But insulation isn’t just about ...

The most thermally efficient EWI systems typically use plastics such as expanded polystyrene (EPS), polyisocyanurate (PIR) or phenolic boards. More sustainable, breathable materials such as wood fibre ...

When these products burn without enough air, the toxicity is even greater. PIR (polyisocyanurate) is based on polyurethane, and gives off hydrogen cyanide and carbon monoxide when burning.