Can be used whenever there is a need to stabilize the chimney above the roof level. The purpose of the bracing is to hold the chimney against wind load and to prevent damage from static and sliding snow. Up to 4' above the roof requires no bracing. From 5' to 10' above the roof 1 roof brace kit should be used, at a midpoint on the chimney. Over 10' use 1 roof brace kit 4' from the roof and 1 roof brace kit every 5' thereafter. Includes roof brace only - chimney and top not included.