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Happylove

08:25AM | 01/02/05
Member Since: 01/01/05
11 lifetime posts
Bvroofing
Hi, I have an enclosed aluminum back porch with an aluminum roof. The inside of the porch has drop ceiling tiles. There is no insulation between the tiles and the aluminum ceiling. I recently noticed with the snow melting, that the tiles at the edge of the roof are wet. Is this from condensation? Should I put insulation in there? If so, what type? I also notice that icycles form and drip from this and the front porch awning even when the temp is in the single digits. Any idea why? Thanks for any tips/help you can give me!

pgriz

06:14PM | 01/04/05
Member Since: 01/21/03
67 lifetime posts
Your enclosed porch probably has some warm air from the house entering the porch area and the moisture in this air will condense on the closest cold surface, which appears to be the roof. You don't say whether your aluminum roof is shingles or long panels, but it is possible that there is an ice dam forming allowing some melt-water to backup into whatever opening it finds. Adding insulation will minimize the transfer of heat to the roof of the porch (thereby minimizing the heat which creates the ice dam), but you will also need to install some kind of vapour barrier to prevent the moist warm air from the house from causing condensation inside the newly installed insulation.


Happylove

04:48PM | 01/05/05
Member Since: 01/01/05
11 lifetime posts
Thank you so much for the reply. I wouldn't have known about vapor barriers, but have since read about them on the web. I just recently bought this house. The porch must have been added later, since there is aluminum siding and a window on the "house" side of the inside of the porch. The roof actually looks like about 3 large panels (with seams). Will this insulation/barrier help with keeping porch warm in the winter and cooler in the summer? Also, regarding the ice dam, could melting snow/ice on the house roof lead to some leaking of the vent pipe that goes through the roof? I also noticed a little dripping in the basement beneath this pipe. Is this critical? The roof otherwise is fine. Thanks again!

pgriz

06:48PM | 01/08/05
Member Since: 01/21/03
67 lifetime posts
Since your porch was an add-on, it may have been meanth originally as a 3-season porch, without any insulation. If the use of it changed to 4-seasons, and no insulation was retrofitted, then you have a problem. The issue is larger than the porch roof - the walls, windows and doors all play a part in insulating (or not) the living space. If you insulate the porch roof, but the walls and windows are not, then you're not going to be better off.

The little drip you see from the ventpipe could be condensation, and/or the seal around the vent-pipe at the roof may be cracked or broken. If it is condensation, then insulating the pipe may help. If the seal is no longer working, then that should be fixed. A cheap fix is some tar or caulking around the vent pipe, but a proper fix would be a new vent pipe boot. Either way, you want to stop the moisture from appearing, since moisture on wood will promote rot.

Happylove

03:08AM | 01/09/05
Member Since: 01/01/05
11 lifetime posts
Thank you pgriz, I appreciate the help. The porch walls are not insulated, (just aluminum panels below the windows) and the storm windows don't even really fit tight (someone said the porch may have settled over the years causing a slight shift). I don't need to use it for living space, but just don't want the water on the drop ceiling tiles, so I may try the insulation to stop that.

As for the pipe, I will watch closely when it rains again to see if I get the water drips (I didn't notice before when it rained, just when the snow on the roof recently melted during a warm up).

Thanks again, I'm glad I found this forum with knowledgeable people like you!


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