Granger ISS (Granger Industries)
The Granger In-ground Safety Shelter comes from Granger Plastics in Middletown, Ohio, a rotational molding plant that also does aerospace and industrial parts. The shelter is one molded piece of polyethylene set into a garage floor, so there are no seams, welds or rust points to chase in ten years. Installation happens through a dealer network organized state by state, and quotes go through an online request form on the manufacturer site.
Worth a look for owners who hate the idea of a steel tub sweating and corroding under a slab, and for garages where floor space is too valuable to give up. Retrofits mean cutting and repouring concrete, which is dust and a few days of patience. Because installs run through dealers, crew quality varies by region, so check the local installer's own reviews before signing anything.
Address: 1600 MADE Industrial Drive, Middletown, OH 45044
Pros
- One piece molded shell, no welds to rust
- Sits flush in the garage floor
- Made by an established Ohio molding plant
- Dealer coverage listed state by state
- Direct factory contact for quotes
Cons
- Install quality depends on the local dealer
- Retrofit means cutting and repouring concrete
- In-ground format only, no above ground room
- Pricing not published openly
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