Your thoughts on this roof?

House was built in 1920. A few months ago, an old metal roof was removed and shingle roof installed. Apparently, they put the roof decking over the battens from the old roof. The rafters are 43"OC… quite a span? I’ve never seen this before. There is no indication of spread or other damage but this has been in place for only a few weeks. Replacing the metal - or tin - roof with sheets of plywood and shingles - I’d like to see an architect or engineer’s recommendations on these modifications

… should I refer it out to an engineer?

Why do you care? It is what it is. Comment as you wish and move on.

Curious how it felt when you walked on it. Was it bouncy?

Sheathing/decking isn’t properly nailed to meet the current FBC.

And you can determine that from photos?
BTW When did a home inspection become a code inspection?

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Like a sponge

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“Why do you care”? I thought that was my job…

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Not looking for code violations, but it doesnt appear to meet standdatds…

Dominic, it’s nailed… but there are half as many rafters to nail to…

given You have no snow load to worry about and it is such a small roof, I’m not sure i see any real problems, of course I’m in my office in Ohio and You were there…If it concerns You, mention Your concerns…


I would go with “non-standard construction practice,” “may not be reliable,” excessive deflection," etc, etc etc.


if its concerning upon your observations recommend a qualified contractor evaluate and state concerns.

I like that. Thanks!

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Part of the wind mitigation report for hurricane insurance… minimum standard is 24" on center.
Discounts go up based on type and spacing of nails.
Insurance may flat out deny that house

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That was my thinking

dhorton2 has it right, especially on a home that age in today’s FL insurance market. Good luck finding insurance on that house with those modifications unless you have a sign-off from an engineer. The weight load must be huge. I’d bet it was at least a little spongy, wait until it sits in the humidity for a while, the neighbors might get seasick looking up.

Look for the APA span rating (black ink stamp) on the backside of the sheathing. I cannot read any in the pics your provided. A span rating of 48" is needed to cover the 43" IMO, which equates to 23/32" or 3/4" thick plywood, perhaps 5/8" absolute minimum. If they used 1/2" or thinner plywood, likely problems down the road.

The house has been there for over 100 years. That must tell you something.


That is formost in my thoughts… but in the last year they have “messed” with it. In the north, you worry about snow load… in Florida, we worry about wind uplift. With the removal of the metal roof, applying roof decking, and then shingles, Have these modifications changed the dynamics, and if so, were these changes designed/approved by an engineer or architect… or not. Will this roof fly away the next time we get 50mph winds?

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It was 7/16" OSB