jswordy
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The screws are not going to leak if they are tight and driven square, and if they are screwed into the flats of the metal rather than the ridges. I have a 40x40 building I built with metal siding and those screws.
What you may experience, though, is water dripping from your metal roof onto your insulation during the spring and fall months when it is humid and there's a wide swing in temps. I have a 26x30 someone else built with uninsulated metal and it rains inside when the temps change.
Little can be done about the shed now. The roof tin would have to be removed and a double-bubble form of insulation installed under it, then refastened. I suppose alternately, you could tack plastic up from inside on the undersides of the rafters, but that would catch and hold water near the wood then.
I know this type construction inside and out now, and know all the drawbacks and places to watch out.
Double bubble under walls and roof...
Interior fiberglass roll insulation...
What you may experience, though, is water dripping from your metal roof onto your insulation during the spring and fall months when it is humid and there's a wide swing in temps. I have a 26x30 someone else built with uninsulated metal and it rains inside when the temps change.
Little can be done about the shed now. The roof tin would have to be removed and a double-bubble form of insulation installed under it, then refastened. I suppose alternately, you could tack plastic up from inside on the undersides of the rafters, but that would catch and hold water near the wood then.
I know this type construction inside and out now, and know all the drawbacks and places to watch out.
Double bubble under walls and roof...
Interior fiberglass roll insulation...