You may first want to find out what exterior wall really is; this is any wall that faces outside or demarcates spaces that have been conditioned from the ones that are not; like the knee walls and basement walls. Exterior wall insulation is to be painstakingly and carefully carried out so as to create every essential thermal envelope about your living space. When exterior walls are adequately insulated, comfort and energy-efficiency will be the outcome and such home will stand out from rather drafty ones.When time is taken to fit the insulation properly, there will is no way for heat to escape into the room and also, the interior will remain cool at summer. Energy will be saved, fund will also be saved and your home will have present and future protection when a good installation job is executed. Remember that the exterior walls are characterized with a lot plumbing and wiring contained in them; special care has to be taken when installing exterior wall insulation around these hurdles. Tips for Fixing Insulation in Exterior WallsIn every exterior wall that demarcates conditioned spaces from the ones that are not conditioned (basement walls and knee walls inclusive), insulation should be installed.Perhaps you are using faced batts, insert the batts into the wall cavity; then, fasten the flanges of the batts onto the interior or the stud’s face on every 12 inches. There must be no exposure of Kraft facing; the installer should get it covered with an approved interior finish. If it is necessary to allow an exposure, a flamed-resistant faced insulation must be used. If the batts type being used is the unfaced batts, the insulation is to be inserted onto the cavity ensuring the right size is used while making sure that it fits snugly at the sides as well as the ends without bulging out in the back. A too long insulation should be cut to retrofit properly; avoid doubling it over or compressing it. A sharp and straightedge utility knife should be utilized. Batts should be cut about 1” bigger than the framing cavity, on a smooth and flat surface. Where a very short material is in use, fill the gap by cutting a piece to size. Use a screw driver or putty knife to force pieces of unfaced insulation onto gaps in order to cover any narrow gaps between joists. There should be also plans to put air leakage under control during Exterior Wall Insulation installation. This can be achieved by applying foam or caulk sealants about the openings such as door and window frames as well as perforations where pipes and wires go through the exterior wall. If you want to apply a vapor retarder – the poly film for instance, begin from the top plate in a corner of the room. The film should be tightly pulled and fastened every 12 inches at least. Make the staples stay at the middle of every stud as well as round the openings working around the room. In order to reduce leakage, overlap the sheets by one full cavity; staple equally through, clipping the two studs at 1 to 2 foot intervals. The film should be pulled tight along the sole plate and clipped in the same way while ensuring that the staples are fixed flat, flush to the surface of the stud.There is more to explore about Exterior Wall Insulation installation here. Spray foam insulation near me