Our house from 1900 has no insulation.
Attic insulation no deep enough.
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.
For example 2x4s would do but that is a lot of extra work.
Pick up the blower and insulation cellulose blown in ceiling insulation is a good choice for diyers.
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.
We do wear hats etc.
Because the simplest and cheapest way to insulate an attic is to add material to the floor.
Plan to pull up the flooring and layer new insulation on top of the old.
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.
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.
This allows a lot of heat up to the attic.
Sometimes there is enough insulation in the middle of the attic and very little along the eaves.
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.
Mark the desired level on different roof trusses around the attic before you start photo 4.
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.
In winter but it is all bearable.
To see how to add insulation out to the eaves see installing rafter vents.
According to the u s.
In other words the entire vent opening doesn t count as vented space.
One obvious solution would be to screw lengths of wood along the rafters to increase the depth.
How much should i add.
That said air resistance and interference such as vent grates reduces the area of true ventilation.
I might be minimized if i only screw pieces of 2x4s from place to place just to support the drywalls.
It is important that the insulation be evenly distributed with no low spots.
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.
In an unfinished attic the process is simple.
R value is a measure of insulation s ability to resist heat flow.
First things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of insulation.
When you re blowing insulation it can get dusty and hard to see whether you ve got it deep enough around the entire attic.
Insulation levels are specified by r value.
