noun
temporary protective roof and scaffolding (for shrine/temple repairs)
A temporary structure built over a shrine, temple, or other building undergoing repair to protect it from weather and provide work access.
修理中の神社には素屋根がかけられていた。
A temporary protective roof had been erected over the shrine under repair.
仮囲い is a temporary enclosure or hoarding, often vertical, whereas 素屋根 is a roofed scaffolding structure.
Compound of 素 (す, 'bare, plain') and 屋根 (やね, 'roof'), referring to a simple, temporary roof structure.