Guardian Interlock Roofing Material Warranty

Lifetime Limited 50-Year Transferable Product Roof Warranty

Discover the security of the Guardian Interlock’s Lifetime Limited 50-Year Transferable Roof Warranty for customers in Canada and the United States. This robust warranty from Interlock Roofing Ltd. ensures enduring protection and long-term peace of mind, reflecting our commitment to quality and customer satisfaction.

Lifetime Limited Warranty

Table of Contents

What does my roof warranty cover?

This is a material warranty for aluminum and copper roofing and cladding products manufactured by Interlock Roofing Ltd. (the “Manufacturer”). Interlock Roofing Ltd. warrants the Interlock® cedar shingle, tile, shake, slate, diamond and standing seam roofing panels, cladding and trims (“Product”) to be free from manufacturing defects that result in rusting, rotting, splitting, cracking (including splitting, cracking and perforation from hail stones measuring 1 1/2 inches in diameter or less) curling, losing impact resistance with age, burning and supporting combustion which manufacturing defect materially affects the Product’s performance (“Nonconforming Product”), subject to the exclusions and limitations set forth in this certificate. Other products or materials used in the installation may have their own manufacturer’s warranty. The installation contractor will provide you with a separate workmanship warranty.

The Manufacturer warrants that the Product will resist wind speeds of up to one hundred and twenty (120) mph (193kph) when installed in accordance with the manufacturer’s recommended installation procedures or FL7253 . If there is Nonconforming Product during the Purchaser’s warranty term the Manufacturer will cover its material and labor costs to repair, refinish or replace same, at it sole discretion, subject to the exclusions, conditions and limitations set forth in this warranty. Repaired, refinished or replaced Product is warranted for the remainder of the Purchaser’s original warranty term; however, in the event that 80% or more of the roofing system has been replaced under warranty, the warranty will duly expire after such replacement. The Manufacturer may at is sole discretion refund the Purchaser’s original Product purchase price. Any other extraordinary costs and expenses beyond the Manufacturer’s obligation set forth in this warranty shall be the Purchaser’s responsibility.

The Purchaser agrees to: notify the Manufacturer immediately of any Nonconforming Product; provide the first opportunity to inspect the Product and provide all reasonable access to complete any service and cure any Nonconforming Product. This warranty will be issued to a maximum of 2 Purchasers only.

Who is the purchaser

The Purchaser is defined as the party whose name and signature appears on the purchase and sale contract and whose name is registered on title to the Property. The Purchaser’s warranty remains in effect for the life of the Purchaser provided that he/she is the registered owner of the Property, subject to the exclusions and limitations set forth in this certificate.

Is the purchaser an organization?

If the Property is owned by an Organization (including but not limited to, a corporation, an unincorporated association, a condominium, a cooperative housing arrangement, a religious organization, a governmental or public entity or a trust) the Product is warranted for fifty (50) years from date of Substantial Completion, including the coating which is warranted for thirty (30) years from the date of Substantial Completion. A warranty extended to an Organization can not be transferred or assigned.

Coating Warranty for Aluminum

The Manufacturer further warrants that for a period of thirty (30) years from the Substantial Completion Date, the aluminum Product’s Alunar® coating will not, under normal atmospheric conditions (this excludes corrosive, aggressive or industrial atmospheres such as those contaminated with acidic or chemical fumes) chalk in excess of a numerical rating of eight (8) when measured according to ASTM D-4214-07 (2015); fade or change color in excess of five (5) Hunter ΔE Units when measured according to ASTM D-2244-16. Color change shall be measured on an exposed painted surface that has been cleaned of surface soils and chalk, and the corresponding values measured on the original or unexposed painted surface. Fading or color changes may not be uniform if the surfaces are not equally exposed to the sun and elements.

When does the warranty take effect?

This warranty takes effect once the installation contract has been paid in full, without offset or withholding. This warranty will become null and void: if there are any outstanding amounts due, whether payable to the installation contractor or the manufacturer, that remain unpaid for more than 60 days after issue or where the installation or the manufacturer or their representatives and/or agents are denied access to the Property for inspections or service.

How do I transfer the warranty?

This warranty is transferable onetime only from the original Purchaser to the first subsequent registered owner of the Property (the “2nd Owner”). If the 2nd Owner is an Organization, the Organization must be the registered owner of the property. The warranty period for the 2nd Owner shall extend fifty (50) years from the Substantial Completion Date including the coating which is warranted for thirty (30) years from the date of Substantial Completion. This warranty can not otherwise be transferred or assigned. The 2nd Owner must send proof of the purchase of the Property to the Manufacturer within sixty (60) days of same with the $300.00 transfer fee (“Transfer Fee”). The Transfer Fee must be payable to Interlock Roofing Ltd. and mailed to the company at 9969 River Way, Delta, BC V4G 1M8. A confirmation email will be issued and is the 2nd Owner’s proof of warranty transfer. If the warranty is not transferred, the Manufacturer will be relieved of all of its obligations to the 2nd owner.

​2nd Owner's limited product warranty

Once transferred, the 2nd Owner’s limited material warranty extends fifty (50) years from the Substantial Completion Date. If during the 2nd Owner’s warranty term there is Nonconforming Product, the Manufacturer in its sole discretion, will cover its material costs to repair, refinish or replace the Nonconforming Product, subject to the exclusions, conditions and limitations set forth in this Warranty. Any and all labor costs associated with same will be the 2nd Owner’s responsibility. Repaired, refinished or replaced Product is warranted for the remainder of the 2nd Owner’s warranty term; however, in the event that 80% or more of the roofing system has been replaced under warranty, the warranty will duly expire after such replacement. The 2nd Owner must give the Manufacturer the first opportunity to inspect the Product and provide all reasonable access to complete service and cure any Nonconforming Product.

How do I register a claim?

A warranty claim must be submitted in writing by email to:

or by regular mail to:

Attention: Guardian Warranty Claims
Interlock Roofing Ltd.
9969 River Way
Delta, BC V4G 1M8 Canada

The written statement should include your name, address, contact number, the warranty certificate # and a description of the issue. You will be required to submit, at your expense, photographs or other evidence of the claim. The warranty holder may be required to pay the costs of any color testing if the color loss proves to be within the measure units specified in this warranty. Written notice of a warranty claim must be provided to the Manufacturer within thirty (30) days of the issue becoming known to you. In the event it is not so notified, the Manufacturer will be relieved of its warranty obligations. The Manufacturer has sole discretion to determine whether the Product is considered Nonconforming. The Manufacturer must be given all reasonable opportunity and access to investigate a claim; travel charges may apply. Unnecessary inspections are costly and time consuming for both parties and the warranty holder will be responsible for a minimum $300.00 inspection charge for any inspection and/or service that is not a valid material warranty claim.

Safety First

Our prime concern is your safety. Every year there are thousands of emergency room visits due to falls from ladders and roofs. We recommend that you hire a skilled professional for work that requires access to or traversing your roof.

Metal roofing sheds rain, snow and ice. In northern climates, weather patterns may allow for large amounts of snow and ice to accumulate. Be aware that snow and ice can build-up and release unexpectedly and ensure that the release area is free from pedestrian traffic and other property during the winter months to avoid injury to people and damage to property.
Snow guards and snow-rails are designed to restrict the amount of snow and ice releasing but the use of these accessories may contribute to the build-up of snow and ice on your roof. If you would like additional snow guards installed on your roofing system or current snow guards removed or moved to another location, contact your installation contractor to arrange for this service. Snow guards and snow-rails are not a manufacturer’s warranty issue and service charges will apply.

Care of your roof

To ensure your roofing system is looking and functioning its best we advise homeowners to have their gutters cleaned annually and have any branches or other debris on the roof removed promptly.

The slope of a roof, general weather conditions, surrounding tree and shade cover and wind and sun exposure are determining factors in the accumulation of dirt and mildew and vary significantly from home to home. Any residue on the roof may be cleaned from the ground by lightly hosing down the roof with a well-diluted nonabrasive liquid detergent and a long-poled soft bristle brush. Debris or other items on the roof may be removed from the ground by using a long rope or pole. We recommend that you hire a skilled professional for work that requires access to or traversing your roof.

Condensation is caused by high levels of humidity and a lack of ventilation. It is often mistaken for a leaking roof. Ensure that your attic and other roof cavities are well-ventilated and that your eaves are free from blockage. If you have condensation issues consult with a professional builder as this may be an indication of poor ventilation, inadequate insulation and/or the
absence of a vapor barrier.

Warranty Exclusions

This warranty does not warrant against and does not cover damages of any kind when due to any of the following: severe weather events or other “Acts of God” (including but not limited to, earthquake, fire, flood and lightning); terrorism or other “Acts of War”; exposure to harmful chemicals, gases or toxins; impact of foreign objects; settlement or failure of any part of the building (including but not limited to the foundations, walls, chimneys, rafters, trusses or sheathing) and/or change in building use; inadequate or improper venting, insulation and/or vapor barriers; condensation; ice-damming; ice and snow shedding; hail damage (excluding splitting, cracking and perforation from hail stones 1.5 inches or less); pre-existing roof irregularities such as uneven roof lines, dips and/ or sagging and pre-existing conditions including but not limited to mold.

This warranty also does not warrant against: the faulty installation or improper use of skylights, antennas, solar or hot water roofing system or high pressure washers; the use of accessories/products that do not properly receive, support or secure Interlock components; the use or installation of dissimilar metals including dissimilar metal fasteners. Roofing repairs, additions or alterations of any kind could affect your warranty so ensure your contractor or service provider is familiar with metal roofing and/or have them call us to get information about working with our product. Accidental or intentional damage and any damage which is a result of a violation or contravention of the building code will not be warranted in any way.

The warranty also does not warrant against: normal wear and tear, including minor scratches and dents; the accumulation of dirt and mildew and other organic material; normal weathering of the roofing surface including minor color differences and aesthetic issues that do not affect the function of the roof including but not limited to oil canning.

Product which has been removed and reinstalled and/or altered or changed in design or function is not warranted in any way.

Copper metal roofing naturally corrodes and tarnishes and therefore is not guaranteed against surface corrosion. While copper metal roofing develops into a patina, there is no guarantee that it will patina in a uniform manner or within a certain period of time as these factors are affected by environmental and atmospheric conditions.

Remedies and Limitations

The Manufacturer’s liability and the Purchaser’s exclusive remedy is limited to Product repair, replacement, refinishing or refund of the original Product Purchase price. The Manufacturer’s liability and the 2nd Owner’s exclusive remedy is limited to the Product repair, refinish or replacement and does not cover any labor costs whatsoever.

The Manufacturer’s obligation under this warranty ends once the original Product Purchase price is refunded and/or where 80% of the roof has been replaced and its’ obligation under this warranty shall in no event exceed the original Product Purchase price.

Any controversy or claim arising out of or relating to this warranty or the breach thereof, shall be settled by binding arbitration in accordance with the rules and procedures of the American Arbitration Association or in Canada, the Canadian Arbitration Association.

The Manufacturer reserves the right to discontinue or make changes to its Products. In the event the Products covered by this warranty are not available, it shall have the right to substitute Product that, in its’ sole discretion, is of equal quality or price.

The Manufacturer shall not be liable for any incidental, special, or consequential damages of any kind, including any damage to the Property, its contents or any persons therein resulting from, but not limited to; ice, ice damming, snow or ice shedding. Some states/provinces/territories do not allow limitations on how long an implied warranty lasts or the exclusion or limitation of incidental or consequential damages so the above limitations may not apply to you.

This warranty shall not be modified or extended and no one is authorized to change this warranty in any way or grant any other warranty. This is the only written warranty provided by the Manufacturer. It reserves the right to cancel and/or modify this warranty without notice at any time; however, all fully paid warranties shall remain in force until their expiration.

This warranty gives you specific legal rights and you have other rights, which may vary from state/province/territory.
This warranty is expressly in lieu of any guarantee and/or warranties, oral or written, express or implied except as are set forth herein, including any implied warranty of merchantability or fitness for a particular purpose.

*Alunar, Interlock and Interlock Lifetime Roofing Systems are registered trademarks of I.E.L. Manufacturing Ltd. and used under license. 

Certificate #:
Property Address:
Substantial Completion Date:

[If there is any conflict between the English and a translated version the English version will prevail.]


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