The house is not occupied and there is access to the crawlspace.
My main concern is that I’m not sure a concrete foundation can be built underneath the house. Since it has the addition which a concrete foundation, the house cannot be lifted. The weight bearing concrete would have to be built upto the level of the house…which I’m not sure is possible.
Well…except to meet code for wood foundation you must use treated wood (usually treated with some kind of copper arsenic) which is not great for the environment (both the production and usage).
I’m sure I need to add way more info…just not sure what’s relevant.
Crawlspace. There are piers…but they appear to be wood. Wood piers in the ground, connect to wood posts/beams above ground. As expected the wood has started to rot and the whole wood foundation needs to be replaced.
This is in the PNW and earthquakes are possible, thus my preference for a concrete foundation(rather not get into the debate about how house would be effected from earthquake).
This is not a foundation repair situation…this is a foundation replacement situation.