Well, last year I was hell-bent on saving money on heating and insulated EVERYTHING. I tucked insulation up between the sill plates & the floor. I wrapped all the steam pipes in the basement to direct the heat upstairs. I put plastic over every window. I insulated every hot AND cold water pipe where they were accessible. I put plastic over every transom and the lites on the sides of the front door.
Lo and behold: today I walked over to the window bumpout to dust and my stocking feet were instantly cold. I realized: where my old house has a sort of bay (the 3 front windows and the floor under them jut out so the room isn't square, it has a sort of built-in bay--I don't know what to call it!), THIS part of the floor actually is part of the porch! And there is NO INSULATION under it. The dining room does the same thing! YIKES! I must be just pouring money through those floorboards!
So tomorrow I'm crawling under the porch to see how the joists run and what I can do to insulate.
What would you recommend for this application? Would fiberglass or rigid foam be better? Should it be foil backed? I am worried that anything I put up that is outside will be a haven for bugs and wood rot. Is there anything I should do to prep the area first? How do I get it to stay in place?
Thanks for any help/advice.