Comments on: What Is a Cold Roof in a Hot Climate? https://www.energyvanguard.com/blog/what-is-a-cold-roof-in-a-hot-climate/ Building science knowledge, HVAC design, & fun Tue, 13 Sep 2022 20:25:05 +0000 hourly 1 https://wordpress.org/?v=6.6.2 By: Kevin Emmons https://www.energyvanguard.com/blog/what-is-a-cold-roof-in-a-hot-climate/#comment-31809 Tue, 13 Sep 2022 20:25:05 +0000 https://www.energyvanguard.com/?p=7747#comment-31809 We have been installing a 3/4” space between the roofing material, usually a metal roof, & the roof deck. 1×4 lath on a diagonal with Cor-a-vent along the perimeters. All leading to a ventilated ridge vent. We try to steer our clients to a white or galvalume color to reflect the suns rays. We don’t have a ventilated attic but do have a ventilated roof. On my personal addition I used a 1 1/2” thick layer of Poly-iso then the lath, etc. this helps immensely.

]]> By: RoyC https://www.energyvanguard.com/blog/what-is-a-cold-roof-in-a-hot-climate/#comment-31808 Tue, 13 Sep 2022 17:14:27 +0000 https://www.energyvanguard.com/?p=7747#comment-31808 Have you ever heard the expression “wet heat” referring to a residential hydronic heating system? That one drives me crazy too.

]]> By: Robert Adams https://www.energyvanguard.com/blog/what-is-a-cold-roof-in-a-hot-climate/#comment-31807 Tue, 13 Sep 2022 17:09:40 +0000 https://www.energyvanguard.com/?p=7747#comment-31807 Where is this part of the country that has winter for 8-12 months of the year? The majority of the northern US has 3-4 months of winter then the rest of the year it’s beautiful weather. Here in TX we don’t even get 2 months of nice weather. It goes from oppressively hot to cold. I would gladly deal with 4 months of winter to have 8 months of beautiful weather vs 10 months of summer 1.5 months of winter and a half month of nice days sprinkled between the two.

Now my annoyance of living in Texas aside… I fully agree with how building science only talks about cold climates which is strange because the vast majority of the US population lives in a hot climate. Terminology like you mentioned often makes no sense at all when looked at objectively. Everything here is hot, Roofs, walls even the ground evidenced by our 89* cold water in the summer…

The building and science community basically ignores hot climates. They also like to say that the temperature differential is less in a hot climate than it is in a cold one. Well… Not really. How about that 140* attic. Oh and every house here is brick so that brick is heat soaking all day and then releasing that heat right into the walls of the house all day. And that attic doesn’t cool off much overnight because its still mid 90s after midnight and barely hits 80* before the horrible flaming ball of gas comes up over the horizon. I wish one day a week in the summer the sun would turn it’s radiation off just to give us a little relief. Keep the gravity but just turn the light off for the day… 🙂

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