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The formaldehyde-based adhesives that are used in engineered timbers also complicated the picture a bit, from long-term health and sustainability perspectives.
by FooHentai 6y ago
The formaldehyde-based adhesives that are used in engineered timbers also complicated the picture a bit, from long-term health and sustainability perspectives.
Perfect world would be a much larger supply of old-growth hardwoods with characteristics that make them ideal for construction. If some synthetic means of growing such material comes around, that could be a game changer.
- rch 6y agoMy understanding is that polyurethane adhesives are better suited for CLT, and don't have the same emissions problems. Your point is well taken though: the entire supply chain needs to be accounted for, in addition to the lifetime of the structures.
- Gravityloss 6y agoThere are also ways around this. You can join softwood with screws made out of hardwood. There's a German company making those. Some companies join boards with aluminum nails. You can make massive wood from cheap material without glue. There's a company that makes boards with a wavy surface. Multiple boards lock together easily. They made a prototype bridge with very little fastening.