we decided to work on the part of the roof that has the most leaks. this room will be part of our passive solar design/experiment. the basic concept is that the summer sun is much higher in the sky than the winter sun, so we measured the amount of overhang we will need to block the summer sun out, while still letting in winter sun. we’re going to build a wall there that is very dense, either out of something like cob (clay, sand, straw) or bricks or something along those lines. in the winter, the sun will hit that wall and because it is dense, it will hopefully store that heat and heat part of our home. what we’ve studied is that even after the sun goes down, that wall will still have the heat stored in it and will release it throughout the evening.
here is a picture of the main concept, only this design is mainly using the floor as the thermal mass instead of a nearby wall:
we are trying to find salvaged or free materials for as many things as possible. if anyone has ideas on something to use for the decking (the material that supports the roof material) please let us know. most builders would use plywood here, but we are trying to not use plywood. it’s easy and cheap, but the life cycle of plywood isn’t something that’s very attractive to us. we are trying to think of how something is made, and who it’s effecting, is it something that would be safe for those people, and would it be safe in a home, how long will it last, and when it is no longer usable, where does it go? plywood has so many toxins in it (formaldehyde is a common one) that we’re pretty sure the people making it are probably sick from it, and on top of that, even though having some in our home may not effect our own health much either way, why take the chance if we don’t have to? plywood can’t be recycled, so it goes into a dump with all of the chemicals that are in it. it seems much more wise to use something that won’t make people sick, and can be burned or recycled later on when it’s no longer usable. the down side to this is that buying sustainably harvested lumber is very expensive. there are so many materials that are perfectly usable that people are throwing out or don’t need, so we are trying to find things like that.
ps we did end up using plywood for the subfloor in this room because we got it for free from a contractor who was about to throw it out.
we also bought an angle grinder to cut out the pipes in our basement. nicole wore her mom’s old steel worker hard hat:





































