STORM DOORS The Learning Center At it simplest, an exterior storm window can be a single piece of glass or clear plastic in a fixed sash unit, which is taken down in the summer and replaced with fixed screens. Better storm windows, which are typically made of aluminum or vinyl, are called combination storms because the storm window glass and screen do not need to be taken down and stored each season. When installing combination storms, it is important to set the window in a bead of long-life caulk (silicone, butyl rubber, or polyurethane), but be sure to leave weep holes in the caulk to allow moisture to escape. You must use an experienced installer; a poorly designed installation will cost more money. Interior storms may be suitable as a solution for one or two problem windows (excessively leaky or prone to condensation), but are not generally recommended for use throughout the house. They can be effective if they are designed well and installed very carefully. Interior storms can permit moisture to accumulate between the interior storm and the prime window, creating moisture damage and reduced visibility. Plastic film can be used to augment or replace traditional storm windows. It can be applied inside or outside, depending on the desired effect. On the inside, shrink-wrap plastic can help stop heat loss through windows and help with condensation problems. It will also reduce or eliminate leakage at windows and patio doors. As a consequence, less fresh air will come into the living space, indoor air quality may be compromised, and the safe operation of furnaces, water heaters, and other fuel-burning appliances may be affected. Overall, relative humidity of the indoor air also will increase, leading to possible moisture damage elsewhere in the home. Keep in mind that if condensation occurs throughout the house, or in certain large areas, you should treat the source of the moisture problem rather than treating the windows.   6. What types of storm windows are available? < back to list of questions about storm doors 1-877-SWING CLEAN info@energyswingwindows.com 3245 Miracle Drive Murrysville, PA 15668 724-387-2991 PA Contractor ID PA001856