08-16-2014, 11:46 AM
IS : 2115 - 1980 : Protection Against Water Penetration.
Mud PHUSKA layer by itself may not be sufficiently waterproof for the roof and it may be necessary to provide beneath it a waterproofing layer or membrane to be effective in this respect. Care shall also be exercised while doing the roof finish work to compact the mud PHUSKA layer to the maximum density
The slope of the terrace shall be such as to drain off promptly all rain-water falling on the roof surface well before the water begins to seep through cracks, if any, into the mud PHUSKA layer. The slope shall not be less than 1 in 40. If it is not possible to give all the slope by the mud PHUSKA layer, part of the slope required for roof drainage may be given in the sub-floor itself.
Rain-water pipes to be provided for roof drainage shall be determined in accordance with the intensity and duration of the rainfall in the area. The cross-sectional area of flow of the rain-water pipe shall be not less than l/5000 of the roof area drained, and the pipe shall in no case be less than 100 mm diameter.
For more detail on mud refer following thread of the Forum
http://www.frontdesk.co.in/forum/showthr...p?tid=2319
Mud PHUSKA layer by itself may not be sufficiently waterproof for the roof and it may be necessary to provide beneath it a waterproofing layer or membrane to be effective in this respect. Care shall also be exercised while doing the roof finish work to compact the mud PHUSKA layer to the maximum density
The slope of the terrace shall be such as to drain off promptly all rain-water falling on the roof surface well before the water begins to seep through cracks, if any, into the mud PHUSKA layer. The slope shall not be less than 1 in 40. If it is not possible to give all the slope by the mud PHUSKA layer, part of the slope required for roof drainage may be given in the sub-floor itself.
Rain-water pipes to be provided for roof drainage shall be determined in accordance with the intensity and duration of the rainfall in the area. The cross-sectional area of flow of the rain-water pipe shall be not less than l/5000 of the roof area drained, and the pipe shall in no case be less than 100 mm diameter.
For more detail on mud refer following thread of the Forum
http://www.frontdesk.co.in/forum/showthr...p?tid=2319