Can we see the exterior elevation drawing? That would help to guide you what direction to go with the porch.

How will the porch be waterproofed?

What is the support for the porch made of? That is going to limit your choices for weight / material, etc. And it appears the porch is the "roof" of the lower level, which will require a water tight finish and slope, etc. That truly should have been called out in the plans, as I would think that the slope should be already built in and managing the water a key consideration of having a porch with finished space underneath.

Virgil nailed it, we have 2 similar porches and it's critical that it be done right or it won't be a pretty sight when you get water in the house. Be very careful.

Hello cpartist, here are the elevations which have the deck running on the two sides of the house.

I was also digging through the plans this morning and found a spec note from the Architect about the Deck Coating & Waterproofing

1. Deck coating: Liquid applied elastomeric two part urethane traffic bearing surface. Install per
   manufacturers specification. Minimum 60 mils multi-coat DFT, finish with walnut shell non-slip
   aggregate. Finish embedded aggregate with aliphatic polyurethane topcoat. 24 gage GSM perimeter
   flashing, saddle flashing provided and installed by deck coating subcontractor. Prime flashing, center
   spun polyester flashing fabric over joints. Vulkem 350NF/351NF or GacoFlex U66.

There is definitely going to be waterproofing done but the top finish coat(material) is what i was going after. From the note above, it appears to be 'Aliphatic Polyurethane'. I am not sure I've ever heard about this product before. I wish I could see an example of this on the internet somewhere.

@jannicone, yes, this is definitely sloped and will be water managed.

So what exactly do you want to put on the deck? Just some sort of coating or do you want to do something like a wood flooring or stone or concrete or ???

All you need is what the architect specified. Google Vulkem or GacoFlex.

cpartist, Vulkem or GacoFlex is the top coat according to what VCFA pointed out. I am not sure what it looks like. When i searched for GacoFlex on Google, i don't really see anything substantial.

I'd like to perhaps have tile but that might be huge undertaking for a DIY project.

You do not want tile. I will look for info in the morning on what we are going to use and post it up.

Here you go, Dec Tec walkable PVC membrane, there are also a lot of youtube videos: http://www.mulehide.com/home/modular-systems-dectec-walkable-membrane-pvc

Google Dex-O-Tex!

I'm with you susha, would like to see decorative flooring over the waterproof membrane/barrier.

There are some trowel-on finishes. I like the look of large format concrete tiles. These are quite light and dry lay, some on sand and some on a pedestal system.