"You don’t think of maintenance as a sustainability issue, but it is," says Swatt, who points out that most exteriors require stain, paint, or sealant for upkeep, unlike the corrugated metal used for their prefabs which is virtually maintenance free.   Photo 5 of 8 in How to Transform Your Balcony into a Perfect Outdoor Space by Isla Wright from This Modular Home Company Designs Prefabs Inspired by Joseph Eichler

How to Transform Your Balcony into a Perfect Outdoor Space

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"You don’t think of maintenance as a sustainability issue, but it is," says Swatt, who points out that most exteriors require stain, paint, or sealant for upkeep, unlike the corrugated metal used for their prefabs which is virtually maintenance free.