I can feel your eyes rolling and judging me from here, BUT my shop roof has condensation and leak problems.
It is a metal & wood polebarn. For non US people that is a wood frame with corrugated metal walls and roof. The building is 60' x 80' feet with 16' walls and a 22' peak. Under the roof panels is a layer of plastic backed insulation - the fiberglass type. Last year we swapped all of the screws on the roof panels out for longer larger-diameter screws. I have also found a few holes and broken screws and repaired those.
Unfortunately, the fucker still leaks. Granted it leaks less, but it still leaks... With the insulation it is about impossible to tell exactly where it leaks from. With the current leaks (about 6 significant spots), I have inspected the general area of the roof (in-line with where it leaks), but just can't find any loose or missing screws. The panels seem ok too.
Naturally, the roof has a pretty big condensation issue too. It is about 20 years old at this point. As a result the insulation is damaged in some spots. Logically, these spots are where I notice the condensation (it drips!). I am not sure sure if the damaged insulation just lets the condensation drip out or if the condensation is worse because the metal panel sees a more extreme temperature difference between the inside and outside...
So, what to do?
If budget were not a concern, I'd just rip the old roof off and re-do it with standing seam panels, which is what we have on our dwelling. However, even in this case I am not completely sure what the best construction technique is. From the outside toward the inside would the proper order be: Metal panels, ice shield underlayment, vapor barrier (??), plywood sheathing, insulation, vapor barrier and then a final inside ceiling? Does that seem correct?
What about these places offering to come and "repair" metal roofing? It sounds almost like they powerwash the roof and spray it with something akin to truck bedliner?
What would you do?
Paging the construction builder DIYer types: @Adventurous @gonefirefightin @johnbryanpeters @DaveW or anyone from the peanut gallery...
It is a metal & wood polebarn. For non US people that is a wood frame with corrugated metal walls and roof. The building is 60' x 80' feet with 16' walls and a 22' peak. Under the roof panels is a layer of plastic backed insulation - the fiberglass type. Last year we swapped all of the screws on the roof panels out for longer larger-diameter screws. I have also found a few holes and broken screws and repaired those.
Unfortunately, the fucker still leaks. Granted it leaks less, but it still leaks... With the insulation it is about impossible to tell exactly where it leaks from. With the current leaks (about 6 significant spots), I have inspected the general area of the roof (in-line with where it leaks), but just can't find any loose or missing screws. The panels seem ok too.
Naturally, the roof has a pretty big condensation issue too. It is about 20 years old at this point. As a result the insulation is damaged in some spots. Logically, these spots are where I notice the condensation (it drips!). I am not sure sure if the damaged insulation just lets the condensation drip out or if the condensation is worse because the metal panel sees a more extreme temperature difference between the inside and outside...
So, what to do?
If budget were not a concern, I'd just rip the old roof off and re-do it with standing seam panels, which is what we have on our dwelling. However, even in this case I am not completely sure what the best construction technique is. From the outside toward the inside would the proper order be: Metal panels, ice shield underlayment, vapor barrier (??), plywood sheathing, insulation, vapor barrier and then a final inside ceiling? Does that seem correct?
What about these places offering to come and "repair" metal roofing? It sounds almost like they powerwash the roof and spray it with something akin to truck bedliner?
What would you do?
Paging the construction builder DIYer types: @Adventurous @gonefirefightin @johnbryanpeters @DaveW or anyone from the peanut gallery...