​Projects:


​Use LiteZone® to upgrade old windows for improved comfort and reduced energy costs.
​The photos below show old wood windows before and after LiteZone® IGUs were installed. The building is more than 100 years old. The hung sashes were removed and replaced by LiteZone® L0679 (4.4" thick) insulating glass units in the existing wood frames by installing glass stops front and back. The upgrade converted the windows from operable to fixed. The upgraded windows achieved insulating values of R12 (U=0.083) center of glass and an overall insulating value of about R10.5 (U=0.095) dramatically reducing energy costs and improving occupant comfort,