.. Take a look at this latest video about the Leak Free system from Velux. Two Buffalo delivers the latest technology in skylight products.  Choose from a wide variety of options from the following manufacturers. American Skylights http://www.americanskylites.com/ Thermo-Vu http://www.thermo-vu.com/ Velux http://www.veluxusa.com/ Wasco Skylights http://www.wascoskylights.com/