Pocketing for the green roof

The masonry repair work in the attic is done. But I have that one more task waiting for me, and it is green roof related. I need to get those pockets punched into the masonry wall for the sistered joists.

The process is similar to the range hood exhaust installation. I use the hammer drill with a masonry bit to drill out the mortar joints and set up a perforation line across the brick. Once that is done, I can grab a hammer and chisel and carve out the joist pocket.

green-roof-structure-011 green-roof-structure-012

In the kitchen at the chimney, the two joists stop short of the masonry wall. I placed a sister joist mock up along the roof joist, which allowed me to mark the exact location for the joist pocket. As for all the pockets, it was a tight space to work in. Nevertheless, the pockets turned out all right, and a test placement confirmed that the sistered joists would fit right in.

green-roof-structure-013 green-roof-structure-014 green-roof-structure-015

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About Marcus de la fleur

Marcus is a Registered Landscape Architect with a horticultural degree from the School of Horticulture at the Royal Botanic Gardens, Kew, and a Masters in Landscape Architecture from the University of Sheffield, UK. He developed a landscape based sustainable pilot project at 168 Elm Ave. in 2002, and has expanded his skill set to building science. Starting in 2009, Marcus applied the newly acquired expertise to the deep energy retrofit of his 100+ year old home in Chicago.

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