Thermal Resistance Roof

Roof soil is engineered to be lightweight allow fast drainage but also high water storage.

Thermal resistance roof.

The water drains quickly through the soil but is retained in the small pores between the smaller particles. 2 1 3 thermal resistance of soil the thermal resistance of soil that was used in our heat flux analysis was obtained from sailor s research. For example a characteristic of a heat sink. For the wood type these tables use the value 0 0085 m 2 k w mm as per the proposed national building code of canada table a 9 36 2 4 1 c.

The ability of the assembly to allow heat to. Specific thermal resistance or thermal resistivity r. The thermal resistance of the framing members rsi f used in the tables is calculated by multiplying the per millimeter mm thermal resistance of the wood type by the depth of the member. Thermal resistance measures the material s resistance to heat flow and is sometimes referred to as r value.

R value of insulation is the most important guiding factor on the ability of the insulation to reduce heat flow up or down. As a result the higher the r value the better the insulation properties when it comes to roof insulation in fact what this means is by increasing or decreasing the thickness of the insulation one can change the effectiveness. The higher the value of this the more efficient the material is. For example if an insulation material has an r value of 2 per inch thickness and the required r value to be reached for the insulation of the required space is 6 then 3.