Overhaul bungalow to beat the heat

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Q: Could you help me decide how to relieve oppressive heat in my rental house, a 1912 Southern California bungalow? In July, August and September, the second-floor bedrooms are uninhabitable until long after sundown. The house was apparently built with no air vents into or out of the attic adjoining those rooms. The following suggestions have been made: Install a wind- and heat-driven turbine on the roof;Install an electric exhaust fan; Build vents into the roof near the ridge, and drill holes for incoming air into the boards between the rafters at the front of the house under the eaves. I want to provide some relief for my tenants without huge expense. A: Both of us having been landlords, we applaud your desire to provide a comfortable living space for your tenants, and we have several suggestions to reduce the second-floor oven temperature. Here are the improvements we would make, in the order in which we would make them: Insulate the attic: This is the first line of d...