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Great, thanks for the info everyone

I was told to use zip ties to attach the pex to the wire mesh for in slab radiant. Is there something special about these zip ties, or can I just use regular zip ties that I can get for free? http://www.supplyhouse.com/Viega-15304-Zip-Ties-Bag-of-100-5305000-p

So for a trench drain at the door, where does the water go? Just evaporates over time? How deep do you make it? Problems will smell?

Garage will be just mainly daily driver in/out. My main concern is with water buildup from rain/snow. I'd rather do some extra work now than have to pull in the driveway, get out in the snow, brush off the car as much as I can, get back in, dirty my car, then pull into the garage. Kind of...

Building a 26x32 garage. I thought of a drain before the walls were poured but didn't really have much time to research it, but apparently my town is okay with it. The slab is not poured yet though, so I guess all I'm really set back is that I'd have to core a hole through my new foundation...

Some of my confusion stems from images such as this. It shows working from the outside in and then inside and back out for "even distribution". Does this not really matter much and I can run the loops as you suggested and be fine...

I've read many different websites that each say a different kind of pex is best for radiant. Can anyone give me a definitive answer? Is it Pex-Al? Also, what about design? 300ft seems to be the largest run I should go, but the garage will be all 1 zone and it's 26x32. Just do 3 separate loops...

Correct - I plan on purchasing a separate unit for heating. They said not to use this one for radiant heating. Any recommendations on what I should use? Water heater or boiler? Brands?

Garage is 26x32 with living space about, so about 1700 sq ft. I want to size it to do the existing house too, about another 2000 sq ft. I am in new england (MA). I called someone to get a price of a geo system, and I think when I see it I'm probably going to end up sticking with a high...

@BlackTalon - Makes sense, thanks for the input. What PSI rigid foam is recommended underneath a 6" slab? Is 40 the lowest I should go with, but prefer 60? @Anthony66 - I had originally got the idea of using spray foam under the slab from you, haha :) It seems most people are saying not to do...

I noticed that a lot of people use XPS rigid foam boards under the slab, and that most recommend using boards with higher PSI than 25 so the slab and cars do not crack it underneath. I see that foamular makes 40, 60, and 100psi boards. Am I better off going with spray foam underneath? Does spray...

Has anyone done this that can weigh in on exactly how it's done and if it's worth it? Doing a garage addition and I plan on doing radiant heat inside the slab as well as on the 2nd floor. Looking for the most economical way of heating the spaces. How would geothermal work, and is it worth it...

Thanks. Most of these seem to have just aluminum on both sides and no polyethylene foam like the low-e one does. Would just plain aluminum work between two solid surfaces? It wouldn't just transfer between the two? Most of these seem to be installed in attics.

Where to get it seems to be a mystery. I have contacted the "distributors" listed on their page and so far no one even knows what I'm talking about. Have any links for a Home Depot alternative?

@Rookie2 - so maybe something like this? http://low-e.com/slabshield.html

Thanks for the info Randy. Would love to see some pictures. Do you heat your garage? How is the temp in there? So you drilled the tapcon screws directly through the foam board and into the concrete? Is this the preferred method, or would I be able to use something like liquid nail? I was going...

Okay, so you think don't worry about it? Does the rest of my plan sound correct in using the rigid foam around the sides as my thermal break from the walls? What do you use to attach the rigid foam to the walls? Also, what do you recommend to cover it since it will be seen on the foundation inside?

My foundation walls are poured and everything is backfilled. I plan on putting rigid foam board around the foundation walls and then spraying 2-3 inches of foam directly to the crushed stone, which will meet the rigid foam on the walls. The only thing I'm not sure about is how to continue that...

Putting an addition on. I'm setup for (2) 10ft doors. Trying to decide on what material to go with though. Is vinyl the best option in terms of maintenance? What about in terms of insulation? Having a hard time choosing the right door.

Here, when you generate more kwH than you use, those kwH credits get added to your account each month. Credits roll over month to month and do not expire. You can even give credits to someone else's account if you'd like. Over the course of a year I will generate about 2000 kwH more than I use...