How Does Reflective Insulation Work

Air ducts in the attic asphalt roofing which more easily absorbs heat from the sun little to no shading from trees.

How does reflective insulation work.

Radiant barriers and reflective insulation systems work by reducing radiant heat gain. The layer of still air itself gives it a degree of extra insulation provided it is still otherwise it will be taking heat away through convection. Reflective insulation and radiant barriers work well in warm climates particularly in homes that have. Found in major outlets such as in home depot s insulation aisle reflectix comes in tightly spooled rolls of 25 by 2 feet of shiny reflective foil look bubble wrap texture insulation in plastic bags.

Dust accumulation on the reflective surface will reduce its reflective capability. The primary function of reflective insulation is to reduce radiant heat transfer across open spaces. A reflective insulation is a material or assembly that reduces the rate of radiant heat transfer across air spaces by use of one or more highly reflective surfaces. Reflective insulation reflects radiant heat and works best with a still air layer of at least 25mm 1 inch.

This rate of heat transfer can be quantified for a specific application by an r value. Radiant barriers and reflective insulation systems work by reducing radiant heat gain. The idea is that this thin material can act as a type of insulation in tight spaces where you cannot put thick fiberglass insulation. The low emittance metal surface of reflective insulation blocks up to 96 of the radiation and therefore a significant part of the heat transfer.

It is most effective when kept clean and dust free. To be effective the reflective surface must face an air space. To understand how insulation works it helps to understand the basics of heat flow which involves three basic mechanisms conduction convection and radiation. Reflective insulation and radiant barriers work well in warm climates particularly in homes with.

Convection is when heat is transferred through the air inside the attic and heats the insulation and conduction occurs when heat moves through the insulation to the building below. Radiation infra red is augmented by convection and conduction. For foil insulation to be most effective the reflective surface should face an air space. Reflective insulation is made from.