While remodeling an upstairs bedroom, I noticed that there are is a double 2x6 running the width of the room above the ceiling joists; it is used to reinforce one side of a gable roof. The Roof Rafters are only 2x4's which span ~ 25 feet. They are nailed together over this beam to produce the full length. I noticed a long time ago that the roof has an awful lot of spring to it when walking. After taking a closer look at the 2x6 beam, I noticed that each of the 2x6's is not full length! They are simply nailed together. I had my neighbor walk on the roof while I watched the beam, it is really flexing (seems to be right on the nails. I am looking for a way to stiffen this up while I have the room open. Due to finished ceiling height, I cannot use anything more than 2x6's. Both ends of the beam rest on load-bearing walls (length of beam =14 feet) Here are the options I thought of:
1. Temporarily support the roof. Remove the old beam, install an LVL.
2. Temporarily support the roof. Remove the old beam, create a beam with 2 2x6's and possibly 1/2" plywood sandwiched between.
3. Do nothing, it's held up all this time and there's no reason to think otherwise.
Seems to me that the LVL in #1 could carry the load better than the 2x6's in #2. Then again, I'm not sure I can even get an LVL in that dimension.
Thanks In Advance,