Lowtech Graph lists low-tech options for every need of a home. Here you can compare them, find tutorials to build them, and link them together into a circular system. Why low-tech?
Keeping rodents and insects out of the structure. They come in through the gaps services and ventilation leave behind, and the cheapest time to close those is while the wall is still open. Insulation made of plant fibre makes this more important, not less.