- <\/i><\/span>\n
IMPORTANT INFORMATION<\/p>\n<\/div><\/li><\/ul><\/div><\/div><\/div>
- <\/i><\/span>\n
IMPORTANT INFORMATION<\/p>\n<\/div><\/li><\/ul><\/div><\/div><\/div>
<\/div>FREQUENTLY ASKED QUESTIONS<\/h1><\/div>
We have collected the questions that may be important for our customers. If you have any further questions, please contact us and our colleagues will be happy to answer them!<\/p>\n<\/div>
<\/i><\/span>Request for an offer<\/span><\/a><\/div><\/div><\/div>![](\"https:\/\/purmester.hu\/wp-content\/uploads\/2023\/08\/purmester_gyik_v1.jpg\" "\\"purmester_gyik_v1\\"")
<\/span><\/div><\/div><\/div><\/div><\/div><\/i><\/i><\/span>What is the R-value?<\/span><\/a><\/h4><\/div>
\nThe R-value indicates the resistance of the insulation material against the heat flux. The higher the R-value is, the more efficient the heat insulation is.<\/p>\n
The R-value depends on the type of the insulation material, the thickness and last but not least on the density of the body. Pick the thicker material and it will increase the R-value in your home and you can save money by decreasing the escape of the heat to the outside.<\/p>\n
Of course, the efficiency depends on the quality of the installation and the professional selection of the material.<\/p>\n
R-value (the higher figure means better insulation)<\/strong><\/p>\n\n
\n\n\n
\n \nMaterial<\/th>\n R-value*<\/th>\n Source<\/th>\n<\/tr>\n<\/thead>\n \n Polyurethane foam<\/strong><\/span><\/td>\n 6.64<\/span><\/strong><\/td>\n Glacier Bay Thermal Study<\/strong><\/span><\/td>\n<\/tr>\n \n Polyisocyanurate foam<\/td>\n 6.35<\/td>\n Glacier Bay Thermal Study<\/td>\n<\/tr>\n \n Polyurethane (rigid sheet)<\/td>\n 5.8-6.2<\/td>\n IFAS, University of Florida<\/td>\n<\/tr>\n \n Polystyrene (extruded)<\/td>\n 5.0<\/td>\n IFAS, University of Florida<\/td>\n<\/tr>\n \n Polystyrene (pressed)<\/td>\n 3.9-4.4<\/td>\n IFAS, University of Florida<\/td>\n<\/tr>\n \n Polystyrene (expanded)<\/td>\n 3.84<\/td>\n IFAS, University of Florida<\/td>\n<\/tr>\n \n Cellulose<\/td>\n 3.2-3.7<\/td>\n IFAS, University of Florida<\/td>\n<\/tr>\n \n Glass wool (sheets)<\/td>\n 3.2<\/td>\n IFAS, University of Florida<\/td>\n<\/tr>\n \n Glass wool (blown)<\/td>\n 2.2<\/td>\n IFAS, University of Florida<\/td>\n<\/tr>\n \n Rock wool (unknitted)<\/td>\n 2.0<\/td>\n IFAS, University of Florida<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n\n
- <\/i><\/span>