09:14PM | 01/13/14
I had a broken pipe in an space under my BR that sits over our garage. I have torn out everything and I was able to see how it was put together. There is a vent that goes into the area to provide heat but the space wasn't insulated very well.

I am going to spray foam the underfloor of the bathroom hitting the joist on the outside wall as well as covering a good portion of the pipes. I won't be able to cover all of the pipes since a few of them hang low and kind of out in the air. I have put foam tube insulation around them all.

When I took down the drywall they had R19 fiberglass between the ceiling hangers to insulate the area. There was a lot of dirt on them when I took them out so you know air was going through the batts.

My thought is to put rigid foam between the hangers instead of batts so it would be an airtight seal, I would also seal along the edges of the foam with spray foam. If I do this though what R value do I try to get. Since it is foam it is more effective than fiberglass and there should be less air flow. So if I use 2" foam board that is an R 10 is that enough? It would be difficult to double up and use 2 2" boards due to space constraints. I might be able to do a 2" and a 1 1/2" board together.

Sorry for the long post, I guess my question is since they perform so differently how do you know what R value would be necessary for this situation?


10:23AM | 01/14/14
Member Since: 01/14/14
85 lifetime posts


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

This garden shed has been decked out to the nines. Designer Orla Kiely created the intimate home for a flower trade show, ... 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... Need a window and a door in a tight space? A Dutch door with a window may be your answer. These useful doors are split hor...
Newsletter_icon Google_plus Facebook Twitter Pinterest Youtube Rss_icon