Hi everyone, great site.1st post! I am building a lean to from strawbales and green roof at the moment just started. I will keep you posted. I am just in the process of securing the frame at the moment to hold the roof as there will be alot of weight on it. I have sank poles 3ft in ground, 6x2 timbers acrooss with round pole along them. Im thinking I need to brace each horizontial pole to the vertical 6x2 some how for strenght?
I am doing the roof 1st and the straw bale walls. I am hoping the straw bales will give the structure more support. The bales will sit on a wooden platform i will attach to vertical poles.I will probably put drainage stone in bags under this platform.
This is really just an experiment for something bigger and better for the future.
Hey looks good! I've been contemplating a similar structure using wood in the round! How are you attaching your rafters to the beams?
I built a straw bale house with a living roof and have been living in it for the past year and it is awesome.
I have some concerns regarding your roof. What are the layers and the depth of them that you intend to put up there? Our roof is considered a "lighter weight" living roof. We used, on top of 2x6 tongue and groove decking, a waterproof membrane, 5" recycled insulation, 6 mil plastic, lightweight drainage material, 2-3 flakes deep of straw and hay and then 1" to 2" of soil. We live in Vermont so we also took into account a large snow load but all that sits on top of full 2x12 rafters on 8x10 beams and 8x8 posts. So I am wondering how those 2x6's are attached to the posts? And how big around are your rafters?
By no means am I an expert and don't pretend to be one in fact I had my design checked twice by an engineer because my family is sleeping under it all! But if your just building an outbuilding go for it!
posted 7 years ago
Thank you for the reply and info. I would love to see a picture of your straw bale house if possible? the rafter and beam are attached with metal stri, you might be able to see in the photo. VT, I am also concerned bout the amount of weight the roof will take, thats my reason for posting here. At the moment the 6x2's are only attach with long screws!! I am thinking of using threded bar now. But also putting a diagonal brace on each corner f 8x8 round post and beam. I think once I put the brace I will be ok. I have a friend who is an engineer so might get him down to have a look. We also get alot of snow here in Ireland. I am now putting round birch poles on top of rafters. I will then put cotton type sheets, cardboard/newspaper, thick plactic sheeting, cardboard,starw, drainage pebble and then soil, finally srawberries!!! This is my first project like this so I haven't really put the thaught planning needed into it. It is really just an experiment. Thanks again Vt
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2019 ATC (Appropriate Technology Course) in Montana