ProtectorFoam Technical Data


	ProtectorFoam TECHNICAL DATA

Typical properties of air dried ProtectorFoam

Density Approximately 10.5 kg/m³

Thermal Conductivity (a) BS4370 Method 7 Range 0.029 to 0.035 W/m deg C

Ignitability BS476:Part3.2004 Class P (not easily ignitable)

Burning characteristics BS4735:1974 Mean extinction time: 23.5 seconds
Mean extent of burn: 25.1 mm
Mean burning rate: 1.0mm/second

ASTM D1692-74 Average time of burning: 19 seconds
Average extent of burning: 20 mm

Smoke Emission ASTM D2843-70 Smoke density rating < 1% (negligible)

Fungal Attack Not affected

Strength Sufficient mechanical strength to be self supporting in the cavity

Temperature Stability Withstands temperatures up to 100 degrees C

Chemical Properties No adverse effects on contact with masonry, building materials, wooden structures, thatch, wall ties or steel frames
Water resistant - whilst allowing a building to breathe

Dry Density Mean 10.5kg/cubic meter
Min 7.875kg/cubic meter
Max 13.1kg/cubic meter

ProtectorFoam has a high thermal insulation efficiency. Thermal insulation efficiency is measured by the U value which is a measure of how much heat will pass through a square metre of a structure when the air temperature on either side differs by one degree. U values are expressed in units of Watts per square metres per degree of temperature (W/m²K).

The different materials used in thatched roofs have differing properties. The suggested target value for a roof is 0.2W/m²K To acheive this with wheat straw requires 350mm (~14 inches), while using water reed requires 450mm (~18 inches). The U values for Protector Foam are as follows;

Thickness of dried ProtectorFoam (mm/in)	U Value (W/m² K)
75 / 3	0.386
100 / 4	0.290
150 / 6	0.193
200 / 8	0.145

This shows that combining ProtectorFoam with existing thatch will reduce heat loss significantly.