Concrete Flat Roof Thickness

Step 3 placing the steel joists.

Concrete flat roof thickness.

Such slabs left unconnected to walls caused many deaths in the 2005 quake from school roof collapses. Flat roofs come in many shapes and sizes which include parapet roofs roof decks and green roofs to name just a few of the options available. The blocks come in several sizes but this guide will assume you are using a 16 3 4 inch wide concrete slab. One of the most crucial step in building a flat concrete roof is to figure out the size of the concrete block you will need.

A concrete roof is exactly what it sounds like. Reinforced concrete slabs are heavier and generate higher seismic forces in an event. The steel joists will provide a strong foundation for the flat concrete. Ultimately a flat roof should play a part in a total architectural composition and has the ability to enhance the aesthetic and practical outcomes of a home.

The flat concrete roof itself can be up to 7 inches thick although the greater the thickness the more the concrete will need be poured in increasing numbers of layers with each one needing to dry before the next is poured. Quinn therm qrfr ffr insulation is a foil faced insulation board which helps further improve the thermal performance to help achieve the desired u value. Exact specifications vary but most concrete roofs are several inches thick. For example the florida based company hurricane proof systems offers a 7 inch 18 centimeter slab of concrete in three layers.

There are a number of quinn therm roof insulation boards which will suit a warm deck flat roof construction built with a concrete deck each with different facings.