How to manage an existing residence with soffits and ridge vent to convert to closed envelope
I am in Orlando Florida and just recently bought a house, I have been following you for years and read your articles.
I have some questions that I have not been able to get answers to. I have a one story home with attic space that I am converting into livable space. It is typical florida construction with cement block and the roof is built with 2×12 rafters, The eaves have the material that has perforations that allow circulation along the roof deck to the ridge vent. On the inside the first floor is cement block and there is Celotex on the cement block for insulation. I will be redoing the roof and removing the ridge vent to make a closed system to bring in the mechanicals in the condition space. However I have not been able to find how to manage the eaves.
1. I read your book and there was a situation where Celotex was used and cause a large moisture problem. Should I remove the Celotex and is so what should I replace it with? Note that there is no sign of mold on the celotex so far. .. At the top of the cement block is where the rafters rest. The celotex rises up to the top of the block only.
If I or dont should i extend it up to the roof deck? there is no mold on the existing celotex that I have found yet. I plan to spray foam the ceilings.
3. On the outside at the eaves do I change the material and remove the perforated siding. If so what do I change it to. also once it is sealed off. there is now a dead space between the now sealed off eave and the new barrier yet to be determine on the inside of the building. will that dead space trap moisture.? Or do I not change the perforated material and allow ventilation to reach the new insulation that is yet to be determined. What will happen.
4. I will be spray foam the ceiling however I read that if there is a roof problem and the sheathing needs to be replace that rips out the spray foam. I was going to place a foam board ( which do you suggest XPS, polysio etc) on the undersurface of the roof deck adjacent to it. Then I was going to spray foam on top of the foam board. and then use batts , (Flash and Batt) finally foam board on top of the rafters sealed to prevent thermal bridging. (no can lights)
None of builders know what I am talking about so I have to guide them through this process.
Also you would be very interested that this is will be first house in florida using the LED light with cat 5 wiring instead of copper with brighter and energy efficient LEDs This is a new product that I am using.
Also I am going off the grid using a MAG drive for energy. I really think you would be very interested in this product. See at American Independent Power.com
I hope that it is not too confusing, but I your input on this project. I am all alone on this. Thank you for your time
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