Illustrator Creating simple line logo with clean angles + scaleable

[johnwm]

i am making a simple logo that is scaleable. So far i have created a layer which will host a representation of a house made using the line tool. The problem i am having is where the different lines join together the angles aren't clean like i wanted, can anyone help with what i need to do to create clean angles in illustrator? here's a screen shot showing the problem...

 

[hawkeye]

Open the stroke panel, with the path selected, choose the corner type you want.

 

[hawkeye]

With the path selected, use the stroke panel to choose the corner type you want.

 

[johnwm]

thx for that much appreciated