Question

Tiles installed on roofs having a slope of less than _____&12 are considered decorative and should have a built-up roof or waterproof membrane installed beneath the tile.

Answer 1

Tiles on roofs with a slope less than 2&12 are deemed decorative and require a built-up roof or waterproof membrane underneath for adequate waterproofing.

Step-by-step explanation:

The question pertains to the requirements for roof tilings, specifically related to the minimum slope required for them to function not just as decoration but also as waterproofing without the need for additional layers. This is a standard consideration in architectural design and civil engineering. Tiles on roofs with a slope less than 2&12 are deemed decorative and require a built-up roof or waterproof membrane underneath for adequate waterproofing.

The commonly accepted standard is that tiles installed on roofs with a slope of less than 2&12 are considered decorative. For such low-slope roofs, a built-up roof (BUR) or a waterproof membrane is typically required underneath the tile to ensure proper waterproofing and to prevent water penetration into the building.