Posted Under: Ask The Expert,insulation,Seasonal Maintenance
Windows and doors need to be re-caulked as the caulking materials start to deteriorate. Here is a list of common types of caulking and what their approximate life span is.
Rope or cord caulk is used as a temporary filler that usually lasts 1-2 years. Easily fills in small gaps in windows by providing an excellent seal.
Oil or resin based caulks last 3-5 years for the cheap stuff and 5 to 10 years for high quality. Oil and resin caulks dry and form a hard surface that bonds with most surfaces.
Latex based caulks last about 10 years. Latex based caulk also forms a hard surface when dry and is commonly used in brick and wood applications, but will not stick to metal.
Butyl Rubber Caulk lasts about 10 years. Butyl rubber caulk forms a hard surface when dry and is made to stick well to unpainted metal and masonry materials.
Silicone Caulk lasts 20 years or more and forms a flexible surface when dry. Silicone caulk sticks to most materials and provides a good lock against moisture.
Polyurethane or Spray Polyurethane Foam (SPF) lasts 20 years or more and has excellent elasticity to fill large gaps. SPF is commonly used as insulation and roofing material. To read more about Polyurethane Spray Foam visit http://www.kohlsfoamsystems.com/