Four season porch


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Old 09-11-21, 04:57 PM
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Four season porch

I hope I知 in the right forum for this, but I知 going to try here first. I have a four season porch that was basically converted into the den on the side of my house (we bought the house 1.5 years ago). There is no foundation underneath, but I was told by people that know the house that it was built like a deck and was built on posts. Since it was built about 25 years ago, I知 somewhat confident that it痴 settled and should move too much from year to year.

I had a home energy audit done last year and the auditor mentioned that it should be open underneath, to get airflow and keep it dry. As you can see in the pictures, there is skirting around the bottom. I began to try to pull it off to look, but there is insulation panels right behind the skirting. There is also a heat/ac duct from the main part of the house running into the porch as well, so I知 somewhat hesitant to pull off the skirting and have that heat duct exposed to the elements, let alone the cold floor in the winter (I live in Minnesota). Long story short, and getting to my question: is there any way that they could have done this legit and I should just leave it alone or do I need to tear off that skirting and leave it open underneath? Thanks in advance.



 
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Old 09-11-21, 06:16 PM
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Lot of guessing here. We can see wood directly on the ground which is not correct. Technically if there is no foundation around that porch.... it should be open underneath. Unfortunately that's not going to help with heating it. Probably not the most energy efficient converted porch.
 
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Old 09-12-21, 05:37 AM
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Way too many unknowns, you need to get into and under there to see what you have then assess the situation!
 
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Old 08-01-22, 08:12 AM
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Question Opened it up

I finally opened it up underneath and I'm still not sure what to do. It seemed pretty dry and I didn't notice anything wrong with the wood (I've attached several pictures). There is also foam board insulation behind the apron that I took off and also underneath the flooring.

I have heard that 4 season porches and decks should be open underneath. My question is whether I need to keep this open or should seal it back up. I live in Minnesota so I'm afraid it will be very cold if I just leave it open (there is a heat register coming from the main part of the house to this, as well as a gas fireplace).

Please let me know your thoughts. Thank you in advance.
 
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Old 08-01-22, 09:01 AM
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You have a vent in your concrete block. Pic #5. Trim brush away from it on the outside and make sure it's clear.
 
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Old 08-01-22, 09:15 AM
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That vent is on the foundation of the house. We had the crawlspace spray foam insulated last year, so that it's sealed on the other side of that vent.
 
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Old 08-01-22, 10:53 AM
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Yes, you need airflow under that structure. That said, you are going to have a colder room in the winter and critters taking shelter under there as well so the solution is not going to be simple.
Might be too late now but the vent you sprayfoamed may have been providing the necessary airflow.
 
 

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