Insulate Old House Floors Without Subfloor

4b slab floors built directly on the ground.

Insulate old house floors without subfloor.

Your yard should have a 5 slope all around the house. Original floors represent a precious link with the past their wonderful undulations. An uninsulated floor allows heat to escape making the house less energy efficient. Also insulate 4a any portion of the floor in a room that is cantilevered beyond the exterior wall below.

Make sure rain drains away from the house on all sides. It has concrete floors not covered with carpet or anything other flooring it s 22 degrees outside and the hardwood floors upstairs are pretty cool. Adding insulation mitigates the problem but there are some considerations to keep in mind. If you want to insulate a floor assembly by leaving the joist bays empty and installing rigid foam on the underside of the joists here are a few things to keep in mind.

Insulation can actually make the problem worse by keeping the subfloor cool. In the quest to make our homes warmer and more efficient floor insulation is often overlooked. To enclose the space in a thermal envelope. Although research is needed there are several possible approaches to reduce condensation on the subflooring.

Unfortunately in old homes this is a common place for heat to escape so it s worth thinking about how insulation can make them more thermally efficient hold heat for longer and protect your home from damp. A pier and beam home built on top of sturdy supports typically has an open crawl space between the floor of the house and the earth. According to the 2012 irc the minimum r value for floor assemblies is r 13 in zones 1 and 2 r 19 in zones 3 and 4 r 30 in zones 5 and 6 and r 38 in zones 7 and 9. Before the floors in the living space were warmer because i was heating with baseboard heaters in each room but this year the electric company raised the price 2 cents a kwh and i got a 300 00.

Under normal conditions a subfloor can last as long as the house itself. The goal however is the same. But keep an eye out for damage in case you need to replace a subfloor sooner. 4c as an alternative to floor insulation foundation walls of unvented crawl spaces.

In many cases these floors are casually insulated with fiberglass batts and covered with osb or plywood. Such floors can be found in homes with post foundations in rooms over garages and in cantilevered bays. Insulation also helps to preserve the air quality and reduce energy costs. If the batts aren t thick enough to fill the joist bays they may fall away from the subfloor and rest on the osb below.