Deck over concrete stoop


Old 03-08-14, 07:06 PM
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Post Deck over concrete stoop

Hi there,

My project for spring, when the four feet of snow finally melts, is to deck our concrete porch and replace the railings etc.

My main concern is how to attach the decking to the concrete. I understand that fastening the studs, that I will attach the decking to, directly to the concrete is a bad idea, on account of the moisture.

The porch is well built, slopes away from the house and is covered by the roof, in general only driving rain will cause water to reach the porch. Either way I want to do it properly.

I thought about using composite 2x4s as the studs and fastening PT decking to the composite material.

What is my best approach here?

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Old 03-09-14, 04:55 AM
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Terminology check: Studs are vertical support members in a wall. Joists are horizontal members to which flooring or decking is applied. Is the deck proposed the same size as the porch, or will it be larger? This will tell how you can build the deck. If larger, it may be better to build a free standing deck. If it is the same size, you may be able to lay the joists directly on the concrete with a vapor barrier beneath them. Pictures, of course, always help us give better advice.
Old 03-09-14, 08:44 AM
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For clarification, I mean joists not studs. Also attached are some pictures of my porch/stoop.

As you can see the porch is completely covered and is about 5ft deep. It is also raised significantly from ground level, about 5ft to the walkway. The bushes are in brick flower beds in front of the porch, the snow is covering it. So I want to deck only to the edge of the porch with a little facia of sorts to hide the concrete from the front view. I also intend to 'wrap' the current columns that look hideous; so my current idea is to deck the concrete then wrap the columns, attaching the base of the columns to the new decking and finally replace the railings.
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