07:48PM | 10/15/05
Member Since: 08/17/04
16 lifetime posts
I installed a new window in a bedroom, and have a question on how it was insulated. Currently, the walls are 2x3's. There is R13 between the studs, with vapor barrier. then there is 3/8 inch plywood, followed by a layer of tar paper. i then put a layer of plastic on the wall (maybe 5 feet wide(the area that needed to be reworked)), followed by 1 inch foamular, then the wood siding on top of that.

The question I have is, should that sheet of plastic be sandwiched between the tar paper and foam? I would have put tyvek in it's place, but that is very expensive for the very small amount I need.

I guess I am wondering, will this sheet of plastic cause the wall to rot over time due to condensation trapped between the plastic on the outside and the vapor barrier on the inside?? I live in WI, and the climate changes drastically.



04:06AM | 10/20/05
Member Since: 01/28/03
694 lifetime posts
Plastic sheathing should never be used on the outside of the wall over sheathing.

It will trap condensed moisture against the house causing your wood sheathing to rot along with the studs in a very short period of time.

Even with the tar paprt left in place, youwill still get the same result because tar paper is somewhat pourous to water.

You really need to think about removing this plastic sheeting because rot is a guarantee the way you did this.

And by the way, housewrap or felt paper or plastic is never used in conjunction with exterior rigid foam insulation.

Remove the plastic because it's going to create a lot of problems.



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

Few projects are more fun than upcycling a vintage piece in a surprising way. Outfitted with a sink and a delicately tiled... Built on a rocky island in the Drina River, near the town of Bajina Basta, Serbia, this wooden house was cobbled together ... Large steel-framed windows flood the interior of this remodeled Michigan barn with daylight. The owners hired Northworks A... Edging formed with upside-down wine bottles is a refreshing change. Cleverly and artistically involving recycled materials... A Washington State couple called on BC&J Architects to transform their 400-square-foot boathouse into a hub for family bea... Similar to the elevated utensil concept, hanging your pots and pans from a ceiling-mounted rack keeps them nearby and easy... For windows, doors, and mirrors that could use a little definition, the Naples Etched Glass Border adds a decorative flora... The thyme growing between these stepping stones adds a heady fragrance to strolls along this lush, low-maintenance garden ... Decoupage is an easy way to add any paper design to your switch plate, whether it is wallpaper, scrapbook paper, book page... 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... Reluctant to throw away any of those unidentified keys in your junk drawer? Hang them from a few chains attached to a simp... A stripped-down model, sans screened porch, starts out at $79,000. Add the porch, a heated floor for the bath, and all the... Salvaged boards in varying widths and colors make up the dramatic accent wall in this attic space. The high-gloss white of... This garden shed has been decked out to the nines. Designer Orla Kiely created the intimate home for a flower trade show, ...
Newsletter_icon Google_plus Facebook Twitter Pinterest Youtube Rss_icon