Undressing

That’s right! Butt naked! That is – the concrete will be butt naked – because two days after the pour it had cured enough for us to remove the formwork, thus undressing the concrete.

We released the Jahn “A” Brackets, removed the wales and peeled back the plywood.

Spraying the formwork interior with a release agent paid off. Separating the plywood from the concrete was relatively painless.

Pouring the concrete in two lifts and carefully compacting (or vibrating) each lift paid off too. The wall finish turned out nice and smooth with hardly any air bubbles.

concrete-pour-03

We handled the formwork lumber, two by fours and plywood, rather carefully, as I would like to reuse it for part of the upcoming porch enclosure.

formwork-02

Our last job was to take care of the snap ties that were still sticking out of the wall. I pulled out the plastic cones with a pair of needle nosed pliers and broke them off, pushed a short piece of ¾ inch iron pipe over the tie, wiggled it up and down a couple of times, and – as advertised – it snapped right off. The small holes that were left behind by the cones were filled in with a sand-cement mix, as you can see in the image above.

Done! What’s next?

Relates posts:

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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