I have a log cabin that has a ceiling made of 200 yr old barn wood. We are wanting to stain it solid but there are large voids between the planks that are allowing the blown in insulation to fall through the cracks. some of the gaps are 3/8 inch most are less than a 1/4. please help me with any solution to fill these voids
I have a similar problem that I will attempt to correct this fall.
My ceiling is pine tongue and groove boards. Additional drying of the wood has caused gaps. In a few areas I can see the kraft paper on the back of the insulation. My plan is to remove the fiberglass batts and install a foil faced foam board in the rafter bays, seal along the foam board where it meets the rafter, then re-install the insulation.
My gaps are not as large as yours so I'm not sure what I am planning will work for you. Some people have suggested I pull down all the T&G boards, install sheetrock to seal the attic/ceiling, then re-install the boards. While that is the best suggestion, and should have been done initially, I can't do it now. Best for me is to attempt a fix from the attic side.