House With No Attic Insulation

Insulating basement walls or slab foundation can reduce heating costs by10 to 20.
House with no attic insulation. Attic ventilation and you do have an attic so to speak i ll get to that in a minute is a science that is unique to the architecture of each building. Wall insulation can reduce a home s heat loss by 67 while attic insulation can lead to a 40 decrease in heating and cooling costs. For example on a hip roof ridge vent is usually not the way to go on most hip roofs there simply isn t enough ridge length. Plan to pull up the flooring and layer new insulation on top of the old.
Based on my experience with houses built in 1950 s you should be 100 sure there is no insulation. This allows a lot of heat up to the attic. If outside is brick one option is to rip out the interior plaster walls put extruded polystyrene rigid board insulation and re frame drywall. Adding insulation where it was never designed to go mainly the walls of an old house causes a host of problems all due to the moisture issues it creates.
But if the floor is covered in plywood you can t stuff enough insulation beneath it to do the job sufficiently not even in warm climates. Here are just a few of the highlights. Many homes are leaky and have insufficient insulation in the attic. Not unless previous owners added some.
10 of your home heating bill costs stem from uninsulated floors.