Roof Insulation How It Works

Your essential guide to insulating lofts and attic rooms.

Roof insulation how it works.

The ideal time to install insulation is when re roofing although above rafter insulation raises the height of the roof which. This air is a rally bad conductor and so reduces the amount of conduction going on. How does loft insulation work. The space between the roof and the ceiling is called the loft.

The way heat can be transferred in or out of a home. The hot roof material then radiates its gained heat energy onto the cooler attic surfaces including the air ducts and the attic floor. Roof insulation and ventilation have to work together to maintain airflow and keep moisture out of the attic. Reflective insulation is particularly useful in hotter climates in the north of australia.

So back to how insulation works. Heat can pass through walls roofing windows and doors the floor and even through your framework. To properly ventilate an attic when it s insulated you will need to install rafter vents. Before any work begins the condition of the roof itself should be assessed and any leaks damp problems or structural issues addressed.

Using different materials and insulation helps to control how much heat is allowed through. Roof insulation is made of fluffy fibrous materials that are good at trapping air in it or at least slows down the air a lot. Loft insulation hot water tanks and hot water pipes. They are placed under the roof sheathing between rafters.

Heat insulation in buildings. Glass fibre works as an insulator by traping air. Moisture build up can cause leaks and mold and mildew to grow. A radiant barrier reduces the radiant heat transfer from the underside of the roof to the other surfaces in the attic.

Glass fibre or other loft insulation materials are laid across the loft to reduce the rate of heat transfer out of the roof see the picture below.