I was wondering about the feasibility of creating wofati roof without plastic sheeting if we were to use layers of newspaper brushed with "tar paint".
Tar from coal or other fossil fuels has carcinogenic VOCs, but natural tar/pitch from the process of making charcoal (anaerobic heating of wood for dry distillation) is considered safe. It can be cut with linseed or tung oil and turpentine to make into a liquid varnish that could be spread on newspaper. If layered, I could see making an effective water-shedding material for Wofati/PAHS building.
Thoughts?
Tar from coal or other fossil fuels has carcinogenic VOCs, but natural tar/pitch from the process of making charcoal (anaerobic heating of wood for dry distillation) is considered safe. It can be cut with linseed or tung oil and turpentine to make into a liquid varnish that could be spread on newspaper. If layered, I could see making an effective water-shedding material for Wofati/PAHS building.
Thoughts?
