Category: Roofing

Performance of Tubular Daylighting Devices

Tubular daylighting devices (TDDs) can economically admit natural light into areas of buildings that do not have windows or skylights. This Update outlines the features and characteristics of TDDs and presents research findings that will improve the ability of manufacturers to design and rate their products. It will also help specifiers select best-performing products for particular locations and installation geometries.

Using Garden Roof Systems to Achieve Sustainable Building Envelopes

There is increasing interest in the garden roof system as a sustainable building design option in North America today. This Update reports the results of a field study to evaluate the thermal performance of this technology, as well as its potential to retain storm water runoff.

Dynamic Wind Testing of Commercial Roofing Systems

Single-ply roofs (SPRs) behave differently than built-up roofs and a simple test method is needed to ensure that they perform well under dynamic wind conditions. This Update describes a new test protocol developed by an industry-supported consortium project led by NRC’s Institute for Research in Construction.

Blistering in SBS Polymer Modified Bituminous Roofs

This Update, based on an IRC study, describes causes of blistering in styrene-butadiene-styrene (SBS) modified bituminous roofs, suggests ways to prevent it and recommends methods to deal with it.

Thermoplastic Polyolefin Roofing Membranes

Thermoplastic polyolefins are a “new generation” of single-ply roofing systems. This Update reviews their characteristics and performance to date and clarifies some misunderstandings related to terminology.

Ways to Reduce Blistering Built-Up Roofs

Blistering is a common problem with field-applied built-up roofing systems. This Update explains what blistering is, describes the causes and recommends ways of dealing with it.