using what roofing materials, tiles iron sheets or shingles,anyway unless you have structural drawings that have trusses sizes shown with measurements of various kingpost calculated to a given angle adopted normally the fundis get the height of the kingpost by dividing the length of the truss by four which translates to roughly 25-26 degrees pitch which normally is okay and avoids confusion for them
hope that helps

MtuBlack- I do not have the structure set up but wanted to research for everything b4 starting. Tnx anyway.

Coloner - me too i start seeing clay attractive and i visualize a somehow steep slope brown clay to have a very attractive outcome. Do you have any idea about the cost and the margins compared to coated, uncoated mabatis. Not forgetting the truss and labour.

Keke2 what if i put iron sheet under,the pull it down to 23-25degree