04:20PM | 04/26/07
Member Since: 04/25/07
1 lifetime posts
Hello everyone.

I've read this one before, but I have a similar problem yet it might be different.. here goes nothing.

We have a constant leak in our family room, which is directly below the bathroom and our children's bedroom. Upon further inspection, removing part of the ceiling where the leak has discolored the drywall, we see the elbow joint of a PVC vent which leads upstairs inside the wall behind the tub but between the rooms. I focus my flashlight up inside the exposed cavity showing the elbow joint more clearly, and can see that the water (which is very very lightly streaming down) begins from further up the pipe. I investigate further by heading upstairs. I enter the kids room, open the closet, and remove the drywall which is fit somewhat loose (so to get at the pipes behind the tub of course) and notice the PVC vent is showing signs of this same very very light stream of wetness. Now I decide to head to the attic, which the entry point is directly above me in the same said closet... poke my head inside with my flashlight to find where the water begins. There are no signs of wetness eminating from inside of the attic... not from the PVC vent, no sign of water on the insulation, not under the insulation between the vapor barrier and wood... no stains from past water.... nothing!

I've recently had someone in to look at this problem. It was suggested that it may be condensation from cold air in the attic, warm air in the PVC vent, and that the condensation starts from within the wall where the heat and cold meet. The drip is slow and at night time is somewhat steady. It doesn't matter if it is winter, or summer, if it is raining, snowing, or hail... it comes back eventually again and again.

The solution suggested to me was to add an extra 20R rated insulation crossways to the already 20R insulation in my attic. It's an older house from the early '70s so..? It was also pointed out that the trusses were jammed with insulation, and that because this has been done, no air can rise inside and draw out through the vents above... which essentially is the culprit for the moisture retention, and build-up of condensation on the pipe within the wall - "cold meets hot". One more bit to add on top of putting more insulation in the attic was to wrap the PVC vent in the attic with insulation as well.

Could someone please let me know if this all sounds correct? I would really... really appreciate the assistance. We're re-doing our family room, and until we can this straightened out we're at a stand-still.


Post a reply as Anonymous

Photo must be in JPG, GIF or PNG format and less than 5MB.


type the code from the image


Post_new_button or Login_button

If you are interested in more about fans and air conditioning, consider: How To: Install a Ceiling Fan How To: Choos... It turns out that many bath and kitchen cleansers contain chemicals that are dangerous to the skin and eyes, and often pro... So often we paint tiny nooks white to make them appear larger, but opting for a dark, dramatic wall color like this one—Be... Chocolate-colored walls and large window frames allow the exposed wood beams to take center stage in this small screened p... If you're not crazy about the idea of commingling plants and pool, this modern variation may be more to your liking. The s... Yes, a freestanding garage can become its own tiny house. Artist Michelle de la Vega has all the comforts of a modern resi... There’s nothing like a new set of cabinet hardware to refresh a room. The possibilities are endless: Go modern, rustic, or... Pursue what's known as the stack effect. To achieve it, open the windows on both the upper and lower floors, and as warm a... Like no other floor type, a checkerboard design works wonders to underscore the retro kitchen theme. Vinyl flooring, ceram... Twine lanterns add pops of crafty—but sophisticated—flair to any outdoor setting. Wrap glue-soaked twine around a balloon ... When securely fastened to a tree or the ceiling of a porch, a pallet and some cushioning make the ideal place to lounge. V... Incorporate nature into your lighting scheme by securing a dead tree in a concrete mold and draping your pendant lamp from... For the cost of a can of exterior paint , you can totally transform your porch. Paint the floor a hue that complements yo... In this urban apartment, a standard-issue patio became a serene and green perch by replacing the typical concrete with gro... If you put the washing machine in the mudroom, you can stop the kids from walking through the house in dirty, grass-staine...
Newsletter_icon Google_plus Facebook Twitter Pinterest Youtube Rss_icon