Insulating A Floor From Above

There are two ways to handle insulating concrete floors.

Insulating a floor from above.

Thanks for your help. Is it okay to place fiberglass insulation between joists that are on a concrete slab with osb subfloor above. This can be done through blown in insulation and unfaced or faced batt insulation. Without insulation heat and cool air are easily lost through the floor.

When insulating from above right a loose fill insulation such as cellulose is breathable and will fit into every nook and cranny. There are two types of crawl spaces ventilated and unventilated and each requires its own form of insulation. About 6 7 inches between the slab subfloor with always. This will be heated living space.

Floor above a garage this detail shows a garage bonus room floor framed with open web floor trusses. Insulation also helps to preserve the air quality and reduce energy costs. If you have 2 inches of insulation your floor has an r value of 6 4. To insulate the floor of the room above the garage seal the space between the floor of the room and the ceiling of the garage and the top plate and the header joist with insulation.

To prevent air leaks it s important to install caulk at all of the indicated locations. The goal however is the same. Gaps negate the r value of the insulation. From above or below.

Most homes require at least r 13 though homes in cold areas can benefit from more insulation. The paper side goes up to the floor and insulation shows. To enclose the space in a thermal envelope. 4c as an alternative to floor insulation foundation walls of unvented crawl spaces.

You can attach wood sleepers to the floor fill the gaps with rigid foam insulation and then apply your finish flooring. It s easier to insulate if there s access to the floor from below and you won t have to disrupt the floorboards here left quilt insulation is pushed between the joists. An insulated floor can make a garage much more comfortable to work in during cold weather. 4b slab floors built directly on the ground.

Clayton ebsch march 26 2018 at 4 35 pm. In those days common building practice was to insulate the floor above the crawl space and to leave the crawl space s wall vents open so any moisture buildup would vent to the outside a.