(Sorry if the technical terms are incorrect; don't hesitate to fix them.) In the recent apartment building I am living on, the terrace is made of concrete with no slope, with elevated pavers and water running underneath them. The lack of slope and the position of the drain pipe allow some centimeters of stagnating water to remain under the pavers, breeding mosquitoes and some nasty larvae. I'd like to minimize the amount of stagnating water to avoid mosquitoes during summer. Some possible sol...
