Abstract: A sound-proofing and heat insulation mat construction comprising: a body sheet (6) made of insulation material, grooves (10) formed on the top of said insulation sheet, a thin aluminum foil (4) mounted on said insulation sheet (6) and moreover covering the grooves (10), further flexible heat transfer pipes (5) mounted in said grooves on the top of the insulation sheet, a thin metal sheet layer (2) covering said pipes and a plurality of parallel V-grooves (8) on the underside of said insulation sheet (6) and further an underliner (7) as a felt-type layer on the underside of the insulation sheet (6) and the underliner (7) folded into said V-grooves said folding allowing the mat element to be bent into bent-up position.