2x4 Attic Joists

Put insulation meant for 2x4 framed walls between the joists which will be the same height as the joists then lay a perpendicular layer of attic insulation maybe r 30 on top of them.

2x4 attic joists.

Sistering installing new larger joists next to the existing ones is one way to bring your attic floor up to code. Chances are your attic is composed of 2x4 rafters and floor joists. You may walk along a plywood pathway and feel a little bounce in the floor and think hey maybe that s ok you may have plenty of head height up there in the middle and think it could work as a room maybe a home office with a desk and bookshelves where the. Positioning the new joist adjacent to the existing preserves precious ceiling but it does come with some potential complications.

2x4 s actual size spaced 16 on center running the width of the building uninterrupted with the ends resting on top of the wall top plate. Often existing joist bays are filled with electrical and heating ducts that will need to be relocated. Depending on the existing attic structure a contractor might be able to sister the current joists by attaching new joists of the same dimension beside them. In attics built purely for storage purposes you may find 2x6 ceiling joists or in some cases even 2x4 joists.

Each joist is strong enough to support my weight 175lbs concentrated in a 1 segment of the joist and. There is a wall under part of the attic which helps support the studs at approximately midspan. Is an attic with only 2x4 joists holding up the ceiling strong enough to use for storage. Some amount of thermal transfer will still occur through the joists themselves.

Can it support an attic ladder and have some plywood put down and used as a storage area. I live in the pittsburgh area. While this is not the optimal setup it is acceptable to have ceiling joists covered with plywood or osb to use for light attic storage of dead loads. With the 2x4 joist what insulation should i use since i do want to put some flooring down for storage.

Option 2 has the benefit of preventing any thermal bridging via the ceiling. Please read disclaimer at end of description sorry this is my first video and i do a terrible job explaining but. Here s how to make undersized and o.