ULC CAN/ULC 704.1:2023 THERMAL INSULATION, POLYURETHANE AND POLYISOCYANURATE, BOARDS, FACED

PREFACE

This is the Fifth Edition of the Standard for Thermal Insulation, Polyurethane and Polyisocyanurate, Boards, Faced, CAN/ULC 704.1.

This Edition of the Standard has been formally approved by the ULC Standards Committee on Thermal Performance and Energy Use in the Built Environment.

This Standard has been developed in compliance with the requirements of Standards Council of Canada (SCC) for accreditation of a Standards Development Organization.

Only metric SI units of measurement are used in this Standard. If a value for measurement is followed by a value in other units in parentheses, the second value may be approximate. The first stated value is the requirement.

Annexes A and B, identified as Normative, form a mandatory part of this Standard.

Annexes C, D, and E, identified as Informative, are for information purposes only.

In Canada, there are two official languages, English and French. All safety warnings must be in French and English. Attention is drawn to the possibility that some Canadian authorities may require additional markings and/or installation instructions to be in both official languages.

This Fifth Edition National Standard of Canada is based on, and now supersedes, the Fourth Edition.

Attention is drawn to the possibility that some of the elements of this Canadian standard may be the subject of patent rights. ULC Standards shall not be held responsible for identifying any or all such patent rights.

Requests for interpretation of this Standard should be sent to ULC Standards. The requests should be worded in such a manner as to permit a “yes” or “no” answer based on the literal text of the requirement concerned.

This CAN/ULC 704.1 Standard is under continuous maintenance, whereby each revision is approved in compliance with the requirements of SCC for accreditation of a Standards Development Organization. In the event that no revisions are issued for a period of four years from the date of publication, action to revise, reaffirm, or withdraw the standard shall be initiated.

Comments or proposals for revisions on any part of the Standard may be submitted at any time. Proposals should be submitted via a Proposal Request in the iCollaborative Standards Development System (CSDS) at https://csds.ul.comi.

This Standard is intended to be used for conformity assessment.

1 Scope

1.1 Products that comply with the requirements of this Standard are intended for use as thermal insulation in building construction. This Standard covers requirements and test methods for closed cell polyurethane and polyisocyanurate foam thermal insulation in the form of flat rigid boards covered on both sides with a facing material which impart some physical characteristics, particularly water vapor permeance and thermal resistance.

1.2 This closed cell polyurethane and polyisocyanurate foam thermal insulation is primarily intended for use in applications where the continuous use temperature is within the range -60 °C to +93 °C.

1.3 These rigid boards are not intended to be used as structural panels.

1.4 This Standard covers only products in which the facing material has been bonded to the foam core in the original foam manufacturing process. This Standard does not apply to products using fibreboard, perlite board, gypsum board, oriented strand board, or any other rigid board, as a facing material on one or both sides (users are referred to ASTM C1289, Standard Specification for Faced Rigid Cellular Polyisocyanurate Thermal Insulation Board, for these products).

1.5 The products covered by this standard are classified into six Types based on mechanical properties and three Classes based on water vapour permeance.

1.6 This document does not purport to address all the health and safety aspects associated with its use. Anyone using this Standard has the responsibility to consult the appropriate authorities and to establish health and safety practices, in conjunction with any existing applicable regulatory requirements, prior to its use.