Recently, there has been an attempt to implement increasingly significant prefabrication in building construction, since this method is considered represent opportunity reduce impacts the construction sector. For pitched roofs, have relevant developments, such as sandwich panels, asphalt shingles, lightweight roof among others. However, relation flat advances of little relevance and are mainly ...

Dried, treated wood was sealed with Thompson's WaterSeal "Clear Multi-Surface Waterproofer" and exposed to outdoor, summer conditions. Sections of the sealed wood were then periodically tested and analyzed in accordance with ASTM methods. The WaterSeal contained a medium petroleum distillate (MPD) as a solvent for a wax. The treated lumber contained a background of aldehydes that could mimic a ...