Flat Roof Deck Construction Details

Consider geography budget and use for the roof to determine the best option.

Flat roof deck construction details.

We include walk on roof surfaces roofing membrane to use below a rooftop deck and construction of rooftop deck railings and posts. Building a deck over a flat roof is very similar to building a deck over a concrete patio. From there the flat roof system you choose will determine the materials you apply. These decks are often referred to as floating as they are not secured in place as a stand alone structure.

A note to consider before construction. This article discusses rooftop deck construction details to avoid building leaks or rooftop deck safety hazards. Special attention must be paid to railing posts and any other penetrations of the roofing surface. Trada and approved document part a give guidance on sizes of joists for flat roofs relating to spans and loading.

They are merely placed on top of another structure. Roof top deck construction. If insulation is installed below the flat roof deck this is called a cold roof. The construction of the flat roof is similar to that of the timber upper floor.

Joists are placed on edge spaced at 400 600mm centres supported by external and internal load bearing walls.