The baffle only needs to provide air flow to above the insulation. Extending them all the way to the top wouldn't help move the air above the insulation.
Would extending the baffle to near the ridge also allow the baffle to act as a radiant heat barrier?The baffle only needs to provide air flow to above the insulation. Extending them all the way to the top wouldn't help move the air above the insulation.
Thanks. So my thought is to remove my existing flimsy baffles which are also not sealed at all at the top plate. I would make new baffles out of foam board, along with a vertical piece for the top plate and all sealed with canned spray foam. That should be rigid enough.They are in short lengths, 1) because they are frail 2) most situations are unfinished attics so they extend just far enough to keep the area clear of insulation where the rafter meets the top plate of wall 3) if you have an insulated roof and need to extend up to ridge then you connect multiple ones
Only if they are reflective would they be a radiant barrier, and even then the fastening lips and lack of going over the rafters would negate the effectiveness.
This house is in South NJ near the coast. Pretty humid at times.All they are doing is keeping the insulation from blocking air flow from the soffit vent to the upper venting. No sealing is needed, and strength shouldn't be a concern. The vertical dam would be for blow-in insulation to prevent it from entering the soffit overhang. Do you have a pic of what you have and describe what your end game is?