Roof Insulation Explained

Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation.

Roof insulation explained.

R value is a measure of insulation s ability to resist heat traveling through it. And if that isn t enough to spur someone into action. W heat loss in watts. Foil insulation is a clever form of insulation that has a reflective surface on one side.

To understand how insulation works it is first necessary to explain the different ways heat flows through a construction. Loose fill materials can be blown into attics and finished wall cavities. Both materials make a great physical barrier between the interior building and the metal roof. To understand how insulation works it is first necessary to explain the different ways heat flows through a construction.

The higher the r value the better the thermal performance of the insulation. Improved insulation is a good step toward improving building efficiency particularly since the atlanta based american society of heating refrigerating and air conditioning engineers ashrae increased minimum roof insulation levels in 2007 in its standard 90 1 the first increase in 18 years. Fiberglass batts or glass mineral wool metal roof insulation the most common material used for an insulating metal roof is fiberglass batts or glass mineral wool. Insulation level are specified by r value.

The table below shows what levels of insulation are cost effective for different climates and locations in the home. A very important source of heat loss from a house is through roof and attic. R value insulation chart find your zone on the map and then use the chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces. Report named insulation as the single most cost effective way to improve energy efficiency based on cost comparison per.

Physically heat always moves from areas of high temperature to those at a lower temperature which is why in the cold external temperatures of winter the warmth inside a building will try to escape through walls windows roof and floor. It acts by deflecting radiant heat from the outside back into the environment which is why it is the best insulation for hot and sun prone environments. M2 square metre of material e g glass polycarbonate or wall. Blown in and loose fill insulation.

Physically heat always moves from areas of high temperature to those at a lower temperature which is why in the cold external temperatures of winter the warmth inside a building will try to escape through walls windows roof and floor. A recent mckinsey co. You can also insulate your flat roof from underneath using the services of a professional. The advantages of foil include that it is cost effective and easy to install.

A rigid insulation board can be applied on the top of the roof s weatherproof layer or on the timber roof surface a new weatherproof layer is then applied on top of the insulation.