Roof Terrace Slope.

A flat roof or deck is composed of several elements: the support, the roof slope, the vapor barrier, the insulation, the seal, the apertures and protection or roof covering.

A flat roof does not mean it is completely flat. In fact it has a slight slope so that rainwater is removed and does not remain on the surface of the roof causing puddles. The slope of a flat roof is typically between 1 and 5% depending on the area.

Methods of applying the slope vary depending on the type of roof and size:

  • Inaccessible flat roofs have a slope of about 1%.
  • Accessible flat roofs may have a slope of 1.5% to 2%.
  • Flat roofs of small surface area are slightly rounded in shape. The center is the highest point.

The graduation of the slope will be part of the design of the support structure and take into account the final covering or protection of the roof, for example, cement, roofing felt, or synthetic covering.

So that rainwater is drained from the roof, drain holes are normally located at the bottom of the slope, and downspouts carry the water to the bottom of the house.

Request a quote