SA Building Standards

SANS 10400-XA Energy Usage in Buildings & Climatic Zonings

There are three ways of proving compliance with the new legislation on energy usage in buildings. The most common is to comply with the requirements of the Deemed-to-satisfy rules that are documented in the Application of the National Building Regulations SANS 10400: XA Energy usage in buildings. The other is by way of a rational design.

In accordance with SANS 1381 Materials for thermal insulation of buildings Part 4: Reflective foil laminates (rolls, sheets and sections), Reflective Foil Insulation have been divided into the following categories.

Sisalation® falls into Category A - reflective foil laminate, reinforced, both surfaces reflective...

Methods and values for Calculation of Heat Flow

The ability of Mass or Bulk materials to slow down or reduce the rate of energy flow, reducing the percentage of heat gain or loss, is dependent on their 'R' Resistance value to energy flow, which is based on the materials 'k' value or conductivity 'C' value. An 'R' Resistance value is reciprocal of the 'C' conductivity. 'C' and 'R' are dependent on the thickness, density and temperature (mean)...

The Total R-value required is achieved by adding the R-Value of the basic elements, i.e.: roof and ceiling or walls, and the R-Value of any additional insulation incorporated in that element (described as the 'minimum' added R-Value of insulation). The Total R-Value of the basic roof and ceiling has been determined by adding together the R-Values of the outdoor air film, roof cladding, roof air space, ceiling sheet lining and internal film...

Industrial best practices, single layer double sided radiant barrier, single layer double sided foil membrane introducing a thermal block, two double foil membranes and comparisons...

Combining foils with bulk type insulation, Domestic metal sheet clad itch roof, domestic cement tile and metal roof...