On 1/6/2021 9:45 AM, Ethan Brown wrote:
First time poster and not a builder. Just wondering if the below is
possible:

I want to deck over our front porch (~1m x 4m). The porch is currently
tiled over a concrete slab. I was thinking of laying joists over the top
and then decking on top of that; however, I was wondering if you can lay
joists down so they arent as tall? I understand that this will make the
deck less stable in a normal circumstance, but will this be the same as
the concrete slab is already there? If I have the joists standing
upright then it will be too tall for our entry way.
Thoughts?


Wood directly on concrete will deteriorate and eventually cause the deck
to slowly collapse. You should have a few inches between if possible.
Use composite or galvanize spacers between the two. It will keep the
moisture and all drained water from contacting the wood and allow
airflow under them.