![]() When you finish with the roof you should start at the top and remove the jacks in the opposite order that you installed them. Always use long nails to anchor roof jacks and make sure that these nails hit something solid. The roof jack should be positioned so that you can easily lay a shingle over it. The best way to remember this is to always drive the jack nails where you drive shingle nails in the shingle. When you nail down the roof jacks, always drive the nails where they will be covered later when another shingle is laid. Note: These types of jacks may not meet the requirements of the applicable provincial Occupational Safety and Health Act. Handling a long heavy board may be unsafe on a steep roof. These jacks are built so that the board is perpendicular to the roof, thus allowing the roofer to walk on the flat part of the board. A board that is turned on edge is much stronger than a bigger board laid flat.Īnother popular roof jack is the solid 38 mm x 189 mm (1 ½ in x 7 ½ in) jack that allows you to slip in a 38 mm x 189 mm (1 ½ in x 7 ½ in) board. On the average house with 1:1 pitch or less, this type of scaffolding is easy to use and safe, providing that the 38 mm x 89 mm (1 ½ in x 3 ½ in) has a straight grain and is not over 3 m (10 ft) long. One of the simplest and the most widely used roof jacks is the flat 38mm x 89 mm (1 ½ in x 3 ½ in) jack. Never use the eaves trough to support a roof ladder. These devices must be securely fastened over the ridge of the roof. Sometimes crawl boards or roof ladders are used on steep roofs as well. Then lift the shingle and drive the nails down. Position the brackets that a shingle can be applied over them removing the bracket, tap the bottom of the jack with your hatchet until the bracket comes loose.
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