Inspect & Maintain Your Ridge Caps
February 16, 2023
Roof Sarking Common Issues
February 16, 2023
Roof sarking and roof insulation are two similar yet different ways to protect your home from heat, cold, and moisture. While both roof sarking and roof insulation are designed to improve energy efficiency and enhance the comfort of the building, they serve different functions and are installed in different ways.
This article will quickly outline key points to differentiate them:
Installation
- Roof Sarking – A thin reflective barrier installed under the roof tiles or metal sheeting to reflect radiant heat and prevent condensation.
- Roof Insulation – Material installed in the roof cavity (between the rafters or on top of the ceiling) to resist heat flow, keeping the interior cooler in summer and warmer in winter.
Material
- Roof Sarking – Typically made of a laminate material with an aluminum foil layer.
- Roof Insulation – Can be made from various materials such as glass wool, rock wool, cellulose, or foam.
Thermal Resistance
- Roof Sarking – Helps to reduce heat gain in summer and heat loss in winter, improving the overall thermal performance of the building. Generally more effective in warmer climates, where the primary concern is to keep the heat out.
- Roof Insulation – Provides a higher thermal resistance than sarking, making it more effective at reducing heat transfer. Effective in both hot and cold climates, as it helps to keep the building cooler in the summer and warmer in the winter.
Secondary Purposes
- Roof Sarking – Can also act as a secondary barrier against water ingress and wind-driven rain.
- Roof Insulation – Can also reduce noise transmission.
Cost
- Roof Sarking – Generally more affordable than insulation, but offers less thermal resistance.
- Roof Insulation – Generally more expensive than sarking, but offers better thermal performance.
Ultimately, the choice between roof sarking and insulation will depend on various factors such as climate, building design, budget, and personal preferences. It’s often recommended to use a combination of both for optimal energy efficiency.
Contact our team today if you’re interested in a personalised roof sarking & insulation strategy for your home.
