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These lava rocks are murdering my backyard sauna dreams - seeking advice
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Heyo Bend - I'm building a backyard Sauna. As part of the project I need a 20 ft trench run, going from the side of my house out to where the electrical panel will be installed. The trench needs to be at least 20 inches deep (though preferably 24 inches). Thus far I've been manually digging it with a shovel but I'm running into massive lava rocks below 18 inches.

I'm sure people on this subreddit have experience getting through these rocks for deck footings, so I'm looking for advice on what the right tool is. There are a lot of mixed reviews online regarding whether trenchers and augers can break through big rocks. And I'm not finding anything specific to lava rocks. Any advice from people who have done this would be much appreciated.

Comments

If you absolutely can't dig down you can always build up a little bit. City approved wiring for my buddy putting a hot tub out in a corner of his yard after he buried it much shallower than required but placed gravel over top above the average grade and placed flat stones on top of that

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7 months ago