Insulating inverted flat roofs with Ravatherm XPS X ULTRA

Discover how to use Ravatherm XPS X ULTRA extruded polystyrene (XPS) thermal insulation boards in inverted roof applications. Ravatherm XPS X ULTRA 300 SL offers architects and specifiers the thinnest XPS insulation with a design lambda of 0.028 and declared lambda 0.027 W/mK.