Roofing Codes: Slope Liquid-applied roofing shall have a design slope of a minimum of 1/4 unit vertical in 12 units horizontal. By Blackpool Roofing|2018-05-15T05:00:00+01:00May 15th, 2018|Emergency Roofing Maintenance, Industrial Roofing, Roofers, Roofing, Roofing Industry News|Comments Off on Roofing Codes: Slope Share This Story, Choose Your Platform! FacebookTwitterRedditLinkedInTumblrPinterestVkEmail