What is UL 790 Ed 10?

In the construction industry, safety and fire protection are of utmost importance. One crucial aspect is the evaluation and certification of roofing systems for their fire resistance. UL 790 Ed 10, also known as the Standard Test Methods for Fire Tests of Roof Coverings, plays a vital role in determining the fire performance of various roof coverings. This article aims to provide an in-depth understanding of UL 790 Ed 10 and its significance in the roofing industry.

The Purpose of UL 790 Ed 10

UL 790 Ed 10 sets out the guidelines and procedures for testing the fire resistance of roof coverings. The purpose of this standard is to evaluate the performance of roofing materials when exposed to fire conditions. It assists in assessing the spread of flames and the release of heat during a fire incident. By subjecting different types of roof coverings to standardized tests, UL 790 Ed 10 provides a basis for comparing their fire-resistant properties and ensuring the safety of both commercial and residential buildings.

Testing Procedures

Under UL 790 Ed 10, several testing procedures are conducted to determine the fire performance of roof coverings. The first test evaluates the material's ability to resist external flame exposure. The second test assesses the spread of flame on the upper surface, while the third test measures the extent of fire penetration through the roof covering. Additionally, tests may also be conducted to evaluate the impact resistance of the material.

Interpreting the Results

After the tests have been carried out according to UL 790 Ed 10, the results are interpreted to determine the fire rating of the roof covering. These ratings classify the materials based on their fire resistance and include classes A, B, C, and an unrated classification. Class A represents the highest level of fire resistance, while unrated indicates that the material did not pass the necessary criteria for any of the classes. The interpretations of these results play a crucial role in selecting appropriate roof coverings for different building types and complying with safety regulations.