Polyisocyanurate / Guides

Installing foam panel insulation, which is best?
Insulation and soundproofing

Rigid insulation panels: which ones to use for different applications

...Polyisocyanurate (PIR), Extruded Polystyrene (XPS), Expanded Polystyrene (EPS) or Styrofoam? When building or renovating a high-performance building envelope there are really three main kinds of rigid foam panels you are going to have to choose from - Polyisocyanurate known as Polyiso (PIR), Extruded Polystyrene (XPS...

R values and insulation performance
Efficient home design

Understanding thermal performance

...polyisocyanurate and stone wool ], measurements of R-value per inch were made over a range of different temperatures more characteristic of in-service temperatures. As shown in Figure 1 below, these measurements found that the R value of both insulation types change with temperature, with the polyisocyanurate [polyiso]...

Roxul mineral wool batt insulation in LEED Homes
Insulation and soundproofing

Choosing the right insulation: the pros, cons and applications for walls, slabs & basements

...Polyisocyanurate insulation (or Polyiso) Method and form : commonly in 2x8 or 4x8 sheets with foil backing Polyisocyanurate insulation boards have some interesting quirks so be careful where you use it © Ecohome Performance: R6 - 6.5 and even higher are the claims of some producers, but independent researcher...

Passive Solar Home design at it's best - Kenogami House - EcoHome
Passive solar home design

Ecohome Kenogami House wins Home of the Year Award

...Polyisocyanurate and 36" of cellulose > R151 Wall insulation: 14" of EPS foam and 7.5" of mineral wool > R 80 Slab on grade insulation: EPS foam and polyurethane > R60 0,57 ACH @ 50 Pa ( Air Changes per Hour at 50 Pascals of pressure) Energy systems: 5400 w photovoltaic solar panels with battery backup ...