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How much weight can a garage roof hold?
I'd rather not start the year off by falling through a roof, so Is it safe to walk on a garage roof without damaging it? It is a flat felt roof and I need to get up there for a quick job, but I’m worried about it sagging or giving way under my weight.
Expert Trade Answers
"what sizes are the joists, and spacing, im a roofer, the flat roof will hold ure weight, , does it have osb board underneath"
Answered on 9th Mar 2026 - Member since Nov 2025 -
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"If it’s only waking on the roof and your centres are every 1600
Or 16 inch should be fine as long as the boards are not rotten"
Or 16 inch should be fine as long as the boards are not rotten"
Answered on 9th Mar 2026 - Member since Oct 2025 -
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"If it's a flat roof the construction should be good enough to take a full snow loading on the roof. But you can't rely all the time that it was built in a good standard. Rafters should be at least 150mm x 50mm if it's a single garage spanning width. Your relying on who built it doing their job correctly"
Answered on 9th Mar 2026 - Member since Mar 2024 -
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