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1 Answer

Wall insulation plan

I am building an energy efficient house, one story slab on grade and just picked up 300 sheets of recycled 3" polyiso insulation. I am considering changing my exterior walls from double stud dense pack cellulose to the drawing below. Any reason I should not?

In Energy efficiency and durability | Asked By Jenz Yoder | Oct 10 14
4 Answers

Standing-seam roof condition

Is the rust and peeling of these roof panels an indication of serious damage? Is there a way to recoat these panels? I have no idea when this roof was installed, but would like to know if I should start consider replacing it, or if it will last another 10+ years. Thanks in advance - Dan

In General questions | Asked By Dan McGonigle | Oct 9 14
1 Answer

An all-window roof

How would you put a roof over one side of our house that is all windows. there are 16-5x8 double windows at a 45 degree angle.Not all, but some of them leak with every rain. We think we have tried everything to fix them with no luck. The only thing left to do is put a new roof on, but i think it would have to be free standing? It is just going to be myself and my wife doing this job. Dont know what to do! Any suggestions would be appreciated.!!

In General questions | Asked By larry boso | Oct 10 14
12 Answers

Understanding vapor transmission and perms

I understand the different levels of vapor retarders and how a lower perm rating means less vapor comes through the material. What I don't understand is how this affects the amount of water vapor coming through in real life.

In General questions | Asked By Nick Welch | Oct 6 14
1 Answer

We have a diesel burner for water heating that heats pipes and radiators

We have a diesel burner for water heating that heats pipes and radiators to keep the home warm in winter. Is there solution instead of that burner using free solar heating?

What is equipment do we need ?

In General questions | Asked By khalid aldaher | Oct 10 14
3 Answers

What sheathing under a metal roof?

We are building a garage. The roof is a 12/12 pitch. We would like to put spray foam insulation under the roof when we have the funds. We have a thermos roof on our house and love it. We thought we were going to use 3/4 inch T&G OSB for sheathing. We then heard complaints about screws stripping out. We really don't want purlins because we live in an area that can have a lot of hail damage. Should we switch to the more expensive plywood? I feel like we are going around in circles.......

In General questions | Asked By Jane Metzger | Oct 9 14
1 Answer

How to reduce AC noise through a bedroom window?

hello….I live in a groundfloor apt. there are two a/c units right outside my bedroom window, about 2 feet away...my unit and my upstairs neighbors' unit. i don't use mine much, but they use theirs ALL THE TIME, even when it's 65 outside! i really don't want to move, but i cannot go through another summer of listening to the pervasive deep buzzing sound of their unit. so far, i have tried styrofoam insulation and also sound board, cut to fit into the window on the inside which has a 3 inch sill all around it. have also hung a heavy thick blanket.

In General questions | Asked By Cynthia Oeser | Oct 9 14
9 Answers

Building science options

looking for advice on options on getting into building science & green renovation ---- it seems there is still a disconnect between the building science research and the builders in the field.

Quick background on me --- I have a Chemistry degree and taught the subject for 8 years before leaving the field to be a remodeling contractor --- so I am very interested in the science behind renovating from an energy standpoint.

In Green building techniques | Asked By Jason Schatz | Oct 5 14
4 Answers

Adding outside air vent to existing HVAC?

Hi all,

I live in Los Angeles and dislike AC. We have AC on the second floor of our home, but in the evening when the outside air is down to a lovely 68-70 degrees, our inside air is still 85. My wife wants to put on the AC. I want to bring in outside air. But simply opening the windows doesn't really work well. What I really want is to integrate an outside air vent into our HVAC system, thus pulling out the inside air and replacing it with outside air. Trouble is, I don't know even what this would be called, so I can't seem to find any information on it by googling.

In General questions | Asked By Franz Metcalf | Oct 8 14
5 Answers

Retrofitting new wall inside existing frame

I have an interesting challenge in my 1941 1500SQFT energy retrofit in Minneapolis (Zone 6-7). I want to maximize realistic R-value while preserving the existing siding and sheathing, which we can assume has no vapor barrier (this will be verified when we open it up). While I would normally prefer to wrap the exterior, this is not possible at this time. There is no historic value to the plaster/sheetrock, and we're demoing kitchen and bath anyway, so I intend to do all insulation from the inside. The home is all 2x4 16"OC construction with old yellow fiberglass batts.

In PassivHaus | Asked By Ryan Griffin | Oct 8 14
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