Warning: Undefined array key "visitor_referer_type" in /var/www/vhosts/wordinf.com/core/app/libraries/Core.php on line 98 Ken Kern - A perfectly flat roof permits up to 50...
A perfectly flat roof permits up to 50 percent more heat gain that a pitched roof... This illustrates the failure of the flat-roof construction to get natural, hot air flow out from under the eaves.