Insulating Knee Walls with Fiberglass Insulation Fiberglass batts can be installed either on the roof deck or the attic flat. The batts have to be cut to fit perfectly in the space where they are installed to prevent gaps.

How do you insulate vertical attic walls?

Quote from Youtube video: And then put a piece of foam board over them to air seal them. But before I do that I'm going to go ahead and spray some spray foam around all these penetrations.

How do you insulate an attic opening?

Quote from the video:
Quote from Youtube video: The important thing to learn is that there's not really anything up here insulating. The space it's like having an open window in your home. That's always letting out the conditioned.

What insulation would best insulate a stud wall?

In most wall applications, you will use R-13 or R-15 kraft-faced fiberglass insulation rolls for these two-by-four stud walls. While rated differently, these two types of insulation are close enough in thickness that they can both fit into modern two-by-four wall systems.

What type of insulation is best for your attic?


Fiberglass, cotton, and mineral wool can all work as loose-fill insulation material, but the far and away top choice for blown-in insulation is fiberglass. Contrary to batts insulation, blown-in fiberglass insulation is perfect for filling in tight voids around wiring, pipes, or any area with awkward framing.

Should attic walls be insulated?

A finished attic should be insulated much like the rest of the house, with insulation in the walls and ceiling. If your attic is already finished, it probably is at least partially insulated. However, most older attics are under-insulated so it’s a good idea to raise the R-value where possible.

How do you insulate where roof meets wall?

Quote from the video:
Quote from Youtube video: Layer. New roof sheeting goes on top screwed into the framing. And inch-and-a-half. Cover the roof deck with roofing underlayment that will protect against liquid water but also allow vapor to escape.

How do I stop the draft from my loft hatch?

If the loft hatch is hinged, you will need to put either the compression seal or the foam strip on the outside perimeter on the top of loft hatch. You will also need to put an equivalent strip on the inside of the hatch frame so that the two strips meet, creating an airtight barrier to stop the draughts.

How do you insulate a walk in the attic?

Quote from the video:
Quote from Youtube video: If you have a piece of plywood for your access door check the framing around where the where the attic door actually sits measure it and then get some foam weather stripping.

How do you insulate attic floor boards?

This could be accomplished by boring holes in the floorboards and inserting the nozzle of an insulation blower machine into the holes. The insulation will fill up the cavities. This would yield the best bang for the buck, as it would place the insulation immediately above the area where it is needed most.

Can you have too much insulation in your attic?

It’s possible to over-insulate an attic as too much will cause moisture buildup and eventually result in mold. Eventually, adding more insulation leads to diminishing returns in trapping heat as well.

What is the best R-value for attic?

Recommended insulation levels for retrofitting existing wood-framed buildings

Zone Add Insulation to Attic
Uninsulated Attic Existing 3–4 Inches of Insulation
1 R30 to R49 R25 to R30
2 R30 to R60 R25 to R38
3 R30 to R60 R25 to R38

Is R30 insulation good for attic?

The average recommended level is 14 inches of R49. In Zone 2, the average minimum requirement for attic insulation is 9 inches of R30 fill. The average recommended level is 17 inches of R60. In Zone 3, the average minimum requirement for attic insulation is 9 inches of R30 fill.

Where should you not put insulation in the attic?

Quote from the video:
Quote from Youtube video: Takes much more time it is much much more difficult. And makes a much bigger. Difference than just blowing the insulation. Now insulation is important absolutely. But you must air seal the house.

Should I insulate between the rafters in my attic?

In unfinished attic spaces, insulate between and over the floor joists to seal off living spaces below. If the air distribution is in the attic space, then consider insulating the rafters to move the distribution into the conditioned space.

Can I use r13 insulation in attic?

Depending on where you live and the part of your home you’re insulating (walls, crawlspace, attic, etc.), you’ll need a different R-Value. Typical recommendations for exterior walls are R-13 to R-23, while R-30, R-38 and R-49 are common for ceilings and attic spaces.

Is there a big difference between R13 and R19 insulation?

The bigger the R value, the better the insulation is at slowing down the heat transfer. So R19 is better insulation than R13, and R30 is better than R19. The larger the R value, the better the insulation value.

Should I use faced or unfaced insulation in my attic?

Faced Insulation: If the attic doesn’t have any existing insulation, use faced insulation with the paper facing toward the heated living space. Unfaced Insulation: When adding more insulation to an attic that already has insulation, use unfaced insulation.

What is r15 insulation used for?

R-15 EcoTouch® insulation is intended to be friction-fit between exterior wall wood studs. Standard R-11 batts require the use of thick foam sheathing to achieve the recommended R-19 thermal performance.

Is R1 5 insulation enough?

In cooler climates a higher R-value is generally recommend, even if your energy report requires a minimum of R1. 5 wall insulation. If you are recladding or replastering your home during renovations, you should consider installing acoustic insulation in your walls.

What is R19 insulation used for?

In many regions of the country, R-19 insulation is recommended for use in outer walls of new construction projects. A different type of insulation is used in areas like basements and attics, and to insulate floors.