Attic Insulation No Deep Enough

How much should i add.

Attic insulation no deep enough.

In other words the entire vent opening doesn t count as vented space. If your attic insulation covers your joists and is distributed evenly you probably have enough. Because the simplest and cheapest way to insulate an attic is to add material to the floor. Our house from 1900 has no insulation.

First things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of insulation. One obvious solution would be to screw lengths of wood along the rafters to increase the depth. In an unfinished attic the process is simple. In winter but it is all bearable.

It is important that the insulation be evenly distributed with no low spots. R value is a measure of insulation s ability to resist heat flow. Your attic should have a certain amount of insulation in it and the recommended level of insulation for your attic is dependent on where you live. Bust out the existing slab and excavate deep enough to install at least 4 inches of inch to 1 inch washed gravel or river rock.

Many homes are leaky and have insufficient insulation in the attic. Warm spaces have less condensation risk than colder space so when you add insulation to the attic floor you re intentionally blocking some of that heat from keeping the attic warm. I might be minimized if i only screw pieces of 2x4s from place to place just to support the drywalls. Plan to pull up the flooring and layer new insulation on top of the old.

Pick up the blower and insulation cellulose blown in ceiling insulation is a good choice for diyers. When you re blowing insulation it can get dusty and hard to see whether you ve got it deep enough around the entire attic. Generally speaking you need a ratio of 1 300 where for every 300 square feet of ceiling space you need 1 square foot of attic ventilation. This allows a lot of heat up to the attic.

For example 2x4s would do but that is a lot of extra work. Basically a traditional farm house type. That said air resistance and interference such as vent grates reduces the area of true ventilation. To see how to add insulation out to the eaves see installing rafter vents.

We do wear hats etc. Use unfaced insulation when adding more insulation to an attic that already has some insulation laying the rolls or batts at right angles to the floor joists. Sometimes there is enough insulation in the middle of the attic and very little along the eaves. Insulation levels are specified by r value.

Department of energy it s recommended that attics have an r 38 to r 49 or about 12 to 15 of fiberglass or cellulose insulation.