Respuesta :
well half an inch would be 4 feet so do the 1 inch for 8 feet then add an extra .5 or four feet and a 12 foot wall would be 1.5 inches
hope this helps
hope this helps
1.5 inches. you only need half of the original inch seeing as that=8ft so you need .5 of that. add them up and you get a total of 1.5inches