Building roof SBS waterproof! What is the lowest temperature for construction?
When the outdoor daily average temperature is steadily lower than 5℃ for five consecutive days, winter construction starts, and the winter temperature drops. In many areas, the temperature is below 0℃ (negative temperature), and the moisture contained in soil, concrete and mortar freezes, making building materials brittle, which brings many difficulties to building construction.
Extended data:
Key points of waterproofing membrane laying:
(1) The waterproof layer of coiled material shall be constructed after the installation of masonry, equipment and pipelines is completed.
(2) When paving high and low span houses, it should be carried out in the order of high first, then low, then far first and then near.
(3) In single-span pavement, the parts with concentrated drainage (such as eaves gutter, cornice, diagonal gutter, gutter, etc.). ) should be the shop is stuck, slope and elevation of the coil from bottom to top, make the coil overlap in the direction of water flow.
(4) When the coiled material is laid parallel to the roof, the long-side lap joint shall not be less than 70mm, the short-side lap joint shall not be less than 150mm, and the lap joint of two adjacent coiled material short sides shall be staggered by not less than 500 mm. In order to ensure the lap joint width and laying straightness of coiled material, the marking line shall pop up when laying coiled material.
(5) The slopes under arched roofs and skylights with slopes greater than 25% should avoid short-side overlapping as far as possible.
(6) Before the coil is laid, the leveling layer should be dry. The general field test method is to cover the coil with 1-2h from night to the next morning or sunny day. If there is no condensation on the inside of the coil, it is considered that the leveling layer is basically dry.
Baidu Encyclopedia-Winter Construction
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