Rigid Board Insulation R Value Chart

As part of that standard the products must meet r value requirements presented as long term thermal resistance lttr.

Rigid board insulation r value chart.

Xps has an r value of 4 5 to 5 0 per inch of thickness. R value is a measurement of thermal resistance and measures the ability of heat to transfer from one side of an object to another. You can even place it under the foundation slab. As foam ages over time air and blowing agents diffuse in and out of the foam structure resulting in reduced r value.

Because rigid foam plastic insulation products are not all aged in accordance with the same standards it is useful to publish comparison r value data. Understanding r value thursday december 13 2018 what does r value mean. Choose rigid insulation wisely and consider the effect its characteristics will have on the performance of the your project overall product cost and the best way to get the bang for your buck. Notes on the r value k values of different forms of asbestos.

These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. The common denominator among varieties of insulation is the r value. A higher r value means that the insulation will do a better job of holding in conditioned air whether that s heat in the winter or cool air in the summer. Polyiso insulation thickness r value chart.

As a benchmark one inch of solid wood has an r value of 1. Rosato asbestos insulation is the most authoritative source on asbestos properties and gives data for the thermal conductivity of asbestos in different forms and with varying temperatures for magnesia asbestos insulation at mean temperatures ranging from 100 f to 400 f the k value thermal. 1 844 446 7858 my account. This insulation board is probably one of the most widely used foam board insulation products in the residential construction industry.

Extruded polystyrene foam xps also known as blue board or pink board comes in many different thicknesses and edge profiles. Install it anywhere from the roof to the foundation. For example if you have a type of insulation that has an r value of r 5 per inch of thickness you will need a depth of 6 inches of this insulation installed in your attic to reach r 30 if you live in zones 2 or 3. Rigid foam insulation packs a lot of r value into a thin package but not all rigid foam performs the same.

Rigid insulation is one of the best tools to reduce your energy costs. The time of testing. In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and. Notes to the table above.

The r value for foamular xps insulation is provided from testing at two mean temperatures 40ºf and 75ºf and from two aging conditioning techniques 180 day real. Rigid polyisocyanurate thermal insulation board.