Many kinds of Canadian houses
Sod is ground that has grass growing on it. For settlers in the Prairies, it was just about the only thing around to build houses out of. So they cut blocks out of sod and stacked them grass-side down to make walls. The roots grew together and made the walls of these “soddies” strong. The builders covered the inside with paper or cloth. Sometimes it and the outside were covered in white plaster. The roof was made from boards or tree branches covered in another thin layer of
sod. Minuses: dirt floors, leaked when it rained. Pluses: stayed cool in summer.