Winter Heat Losses
Summer Heat Gains
Sample of Roof Insulation System Design
Exposed Trusses with Metal Sheeting and 22mm Pine Ceilings
Thermal Insulation
Insulation is the most effective way to improve the energy efficiency of a home or a building.
Insulation of the building envelope helps keep heat in during the winter and out in summer to improve comfort and save energy.
We design the roof insulation systems to meet SANS 10400-XA regulatory requirements.
We do R-value calculations and provide advice on the optimal use of roof insulation materials.
The introduction of new Energy usage regulations (SANS 10400-XA) and Energy efficiency codes (SANS 204) has profound implications on the design philosophy of roofs.
The thermal insulation as well as the structural and aesthetical requirements of a roof are designed interactively.
Insulation could add additional benefits such as acoustics and waterproofing.
Typical R-values of common roofing & insulation material
| Description | R-Value |
| Metal Roof Sheets | 0 |
| Concrete Tiles | 0.04 |
| Nutec Slates | 0.037 |
| SA Pine Timber | 0.1 per 10mm thickness |
| 6.4mm RhinoBoard | 0.045 |
| Double-sided Reflective Foil Laminate with air gaps both sides | 1.59 |
| IsoBoard | 0.333 per 10mm thickness |
| LambdaBoard | 0.417 per 10mm thickness |
| Isotherm 75mm (10kg/m3) | 1.531 |
| Isotherm 100mm (11.5kg/m3) | 2.326 |
| 180mm Concrete Slab (2400kg/m3) | 0.11 |
| 75mm Aerolite Glass Wool | 1.88 |