Fiberglass Roof Insulation R Value

The higher the r value the better the thermal performance of the insulation.

Fiberglass roof insulation r value.

R3 r18 r21 total roof r value. Find your zone on the map and then use the above insulation r value chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces. R panel is manufactured with a closed cell polyisocyanurate foam core bonded to fiberglass reinforced facers and designed for use over metal nailable and non nailable roof decks with a variety of membrane systems. Type 703 and 705 are available with factory applied frk or poly encapsulated asj max facings.

Depending on where you live and the part of your home you re insulating walls crawlspace attic etc you ll need a different r value. Insulation project calculator how to install naima r value certification product training videos colab learning video library for pros distributor locator why owens corning insulation propink vs. Built up roof membrane gravel surfaced membrane and gravel only 0 33. The common denominator among varieties of insulation is the r value.

R value is a measure of insulation s ability to resist heat traveling through it. As a benchmark one inch of solid wood has an r value of 1. R value per inch ft f hr btu rsi per millimeter k m w r value for typical installed thickness not per inch source. National roofing contractors association.

Owens corning type 703 type 705 700 series fiberglas insulation boards are made of inorganic glass fibers with a thermosetting resin binder and formed into semi rigid or rigid rectangular boards. Recommended home insulation r values. In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and. The maximum thermal performance or r value of insulation is very dependent on proper installation.

Insulation level are specified by r value. Mineral rock or slag wool. Typical recommendations for exterior walls are r 13 to r 23 while r 30 r 38 and r 49 are common for ceilings and attic spaces. Johns manville r panel rigid roof insulation board offers r values of up to r 23 6 providing high thermal efficiency.

R value of roofing materials and building insulation. Ducts in unconditioned spaces. The table below shows what levels of insulation are cost effective for different climates and. Calculate percent improvement in r value.

I calculate insulation resistance to heat loss or r percentage improvement always as relative to the original number. Rigid fibrous or fiber insulation. Spray foam pink fiberglas vs. R value is a measurement of thermal resistance and measures the ability of heat to transfer from one side of an object to another.