Roof Insulation How It Works

This air is a rally bad conductor and so reduces the amount of conduction going on.

Roof insulation how it works.

Before any work begins the condition of the roof itself should be assessed and any leaks damp problems or structural issues addressed. Conduction is the way heat moves through materials such as when a spoon placed in a hot cup of coffee conducts heat through its handle to your hand. They are placed under the roof sheathing between rafters. To understand how insulation works it helps to understand heat flow which involves three basic mechanisms conduction convection and radiation.

A radiant barrier reduces the radiant heat transfer from the underside of the roof to the other surfaces in the attic. Heat insulation in buildings. 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. The way heat can be transferred in or out of a home.

The ideal time to install insulation is when re roofing although above rafter insulation raises the height of the roof which. Loft insulation hot water tanks and hot water pipes. The space between the roof and the ceiling is called the loft. Reflective insulation is particularly useful in hotter climates in the north of australia.

Moisture build up can cause leaks and mold and mildew to grow. To properly ventilate an attic when it s insulated you will need to install rafter vents. Heat can pass through walls roofing windows and doors the floor and even through your framework. Using different materials and insulation helps to control how much heat is allowed through.

A radiant barrier works best when it is perpendicular to the radiant energy striking it. Roof insulation and ventilation have to work together to maintain airflow and keep moisture out of the attic. How does loft insulation work. 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 is made of fluffy fibrous materials that are good at trapping air in it or at least slows down the air a lot.