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Greenhouse Costs and Benefits
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acrylic air exchange aluminum angle attached back-up heating backdraft battens beam blocking bottom building built caulk chapter cold climates common wall concrete construction convection cost curb door eave edge endwall energy conservation extruded fiberglass flashing floor foam foundation Frame material fuel glaz glazed area Glazing material glazing tape green growing area growing beds heat exchange heat loss heat storage heater holes inch inside installed insulation kneewall living space louvers masonry moisture nails needed neoprene P. O. Box paint panels percent Photo pieces piers plastic polycarbonate polyethylene polystyrene post-and-beam rafters require screws seal shading shape sheathing shown in figure side silicone sill sloped glazing soil solar greenhouse solar heat solid roof south-facing square feet square foot stud summer sunny superinsulated temperature thermal break thermostat tion vapor barrier vent Ventilation system vertical glazing weather stripping wet seal winter wood