How To Add 2 X 4 To Attic Rafters

So if your rafters are only 5 1 2 deep that is all the space you have for insulation.

How to add 2 x 4 to attic rafters.

Adding a 2 x 4 along the bottom chord of the 2 x 6 ceiling floor joist maybe helpful in stiffening the joist as well. The live loads a truss is required to bear are determined by local building codes. Attach 1 2 inch wood cleats to both sides of the existing rafter. Attics are fresh air ventilated so provisions must be made to reroute the attic s ventilation through the rafter spaces and the rafters must then be insulated.

An attic conversion is a great way. I thought the rafters were 2x6 s but they are 2x4 s. I need to add a 2 6 edge edge to my current 2 6 rafters to accommodate r 38 or better insulation in my attic ceiling that will be finished with sheetrock after insulation. 1 1 2 story house built in 1904 i think.

If the bottom chord of a roof truss functions as a floor joist such as in an attic room it carries a live load that also varies by use but a typical live floor load for a residential space is about 40 pounds per square foot. Ceiling joists are the horizontal boards that span the width of the house resting on the outer wall plates and possibly on. Anyhow they currently have batts of fiberglass between them which is in co. It is possible however to add pieces of wood onto the rafters to fur them out to allow for more insulation.

When installing 2 by 4 lumber to existing 2 by 6 rafters add the 2 by 4 width which is 3 1 2 inches to the 2 by 6 width which is 5 1 2 inches for a total of 9 inches. Next set the framing square on top of the rafter beam and use a pencil to trace the outside edge of the framing square s tongue. Use cleats the same length as the width of the new rafter when added to the width of the old rafter. There are a myriad of ways to do this from what i see and my question is around a good fastening methods.

Gluing and screwing a 3 4 attic subfloor and providing solid bridging should also be considered. Roof insulation for 1 1 2 story homes a home where you have living space in the attic is typically installed in the rafter spaces. Upper bedrooms are made up of about a 24 inch high exterior wall then vaulted ceiling.