I'm adding a small bathroom to the back of the house (10x14) and am coming up with three different numbers for rafter length (one by hand, two using online calculators). It's a simple roof 4/12 pitch, 14'1" outside to outside, 2/6 ridge board and 2/4 rafters. Any advice/tips for figuring out length? I want to pre-cut so I can start nailing away once I have the joists hung. Thanks, Tim

Our house has one downspout that drains into a 5" flexible hose which continues vertically underground. During very hard rainstorms, water gushes out of the downspout-hose connection. I disconnected them and ran an electrical snake in the hose, and it seemed to hit a hard stop at about 8'. I asked the previous owner where the drain went, and he thought it went into a drain around the house. The blueprints do show a perimeter drain pipe near the foundation, which would put it about 5' underground. That raises some questions. 1) If that perimeter drain pipe exists, why would all other downspouts (7 of them) have simple horizontal extensions to direct the water about 6' away from the house, rather than also draining into the perimeter drain pipe? This downspout cannot do that because it would flow across a walkway. 2) Where would the perimeter drain pipe go? It cannot go into the public sewer system, I am confident. At that depth, I am pretty sure it has no place on my property to drain onto the surface. Can it drain into a street storm drain system (even though I do not see one nearby)? 3) There are 2 clean out caps in our yard. One is near the house, and above ground level. One is near the street and is barely at ground level. I had assumed that both were sewer clean outs. Could one access a storm drain? (Is there no requirement that storm drain clean outs be above grade?) 4) If it does not drain into a perimeter pipe, how do I approach improving flow through this hose? If it travels across the property, it could drain above ground. If so, I want to know where it goes and assure it stays open. I tried running water from a hose in it and looking for water coming out somewhere unsuccessfully. The hose did NOT overflow, so there is some runoff. What do I do to track it? 5) If it empties into a perimeter drain pipe, I do not want to risk plugging the connection with an object on the end of a snake to allow better pushing of the snake. How would I determine where the perimeter pipe empties? To check the connection of the hose with where ever it goes, digging is not a good option because there is little space between the house and walk, and I would risk cracking the walk by undercutting it. What would I do here? I have good runoff except with huge downpours, so I guess a spillover collection and horizontal drain can direct the excess away from the house. I have never seen such a thing, so would envision having to fabricate my own. Suggestions?