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Starting a 4x6m deck build next month and looking into modern foundation options. Our garden has limited side access (standard 80cm gate), so bringing in heavy machinery or a cement mixer isn’t really an option without tearing up the lawn. Ground screw foundations seem ideal, but I’m worried about hitting resistance halfway down. Are handheld screw drive units powerful enough to get past hard-packed dirt, or do they constantly stall out? Any practical tips?
Handheld and compact ground screw drivers are surprisingly powerful because they use high-reduction planetary gearboxes specifically engineered for high torque at low RPMs. As long as you aren’t hitting solid bedrock, a proper machine will cut straight through hardpan and roots without bogging down. Check out https://iron-mechanics.com/product-category/ground-screw-drivers/ to see the different handheld and mobile rigs available. They are compact enough to fit through standard garden gates while delivering more than enough driving power for deck foundations.
Appreciate the insight, compact high-torque gear is definitely the way to go here.
