Quote:
Originally Posted by Jebby
If the entire roof is being replaced then what is the problem preventing a green roof? If I recall correctly it was posted here that the roof couldn't handle the weight. Is it the upper steel floors that wouldn't be able to handle the weight as well?
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In those cases, it's not just the roof that can't handle the weight, it's what supports the roof. I.e., the support columns, and the spans between them. Even the foundations may need to be beefed-up.
A green roof is incredibly heavy. The weight of soil, then saturated with water, and all above a commercial building with huge spans between support columns, is nothing to take for granted. If it's not been built into the original design, then it's a lot of work to ensure an existing structure is made strong enough for that much added stress.