This photo of a living room in Park Ridge Illinois in 2021 during a routine inspection is a great example of the deficiencies of of fiberglass ( the fiberglass sags over time) . There are several options for solving this issue, including exterior air sealing to prevent air intake at the base of the foundation to top bottom plate of the wall framing. Additionally the walls can be accessed from the interior by drilling holes in the drywall and dense packing cellulose insulation between stud cavities. The studs will still transfer cold air in winter and warm air in summer ( called Thermal Bridging ) as there is little to no R-Value in the framing members themselves. To truly prevent the image in this photo a layer of rigid foam board over the studs on the exterior beneath the exterior cladding would be recommended. Problem : the furnace is constantly working against these cold spots making the living room uncomfortable drafty and cold. Solution : dense pack cellulose to existing walls between stud cavities and air sealing exterior seams contributing to cold air intake. Call now for a free inspection or fill out our contact form.