Plan to pull up the flooring and layer new insulation on top of the old.
How insulate attic bedroom.
It s available in fiberglass mineral wool plastic fibers and natural fibers.
Because the simplest and cheapest way to insulate an attic is to add material to the floor.
Insulate across the top of flat attic.
Most codes require a specified minimum amount of headroom and it s tough to meet this requirement when insulating a finished attic especially since most codes require insulation equal to r 38 or more.
Additionally purchase some loose fill insulation to insulate corners and angles where the batting won t fit.
Blanket insulation is available as batts or rolls and is the easiest diy insulation material.
You can t just insulate the entire rafter bay because you ll trap moisture against the underside of the roof sheathing and cause it rot out.
That becomes the thermal barrier.
You ll want to buy enough batting to lay at least 10 to 14 inches over the entire space.
See below for a shopping list and tools.
And the answer to that is if that attic is going to be a heated finished space then the insulation moves from the ceiling of the second floor up to the underside of the roof rafters.
Now to do that you have to be very careful to make sure you maintain some ventilation space.
To insulate an attic get some batting made out of mineral wool fiberglass or recycled foam.
Insulating a finished attic there are two basic ways to insulate a finished attic.
This type of insulation.
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.
Insulate the remaining area of pitched roof and around the dormer window.
In these designs take out attic floor insulation only below the finished space from knee wall to knee wall and insulate the knee walls themselves.
In this case the area behind the knee wall will be uncomfortably hot or cold.
Insulate the horizontal section of ceiling.
To meet all three goals insulating your finished attic ventilating the roof and maximizing headroom use a combination of dense batt insulation rigid foam sheeting and air chutes.
This old house general contractor tom silva and host kevin o connor demonstrate the proper way to insulate an attic.