ive been trying to get some one for ages to clean around my chimney as there is weeds starting to grow from it due to birds pirching on it ,as i am finding it hard to get some one i thought i would do it myself only trouble is i cant get my hands on a roofing ladder so what i want to know is how do i go about making one what timber do i need length size etc can any one fill me in on what i need to make one