Meet or Exceed Industry Standards
Limit liabilities and instill confidence in your work with independently tested and verified cladding.
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Cladding with Confidence
Meet Standards with the VSI Product Certification Program
Vinyl siding has long been the exterior cladding of choice for homeowners, contractors and builders across North America. The VSI Product Certification Program is backed by over two decades of experience, with products tested and validated by an independent ISO/IEC 17065 accredited third-party certification body. As the first and only cladding product certified by an industry-sponsored cladding program, certified products are rigorously tested per program requirements to ensure they deliver the superior protection you need to meet—and exceed—international code standards. Save time, reduce wasted work and deliver peace of mind with VSI Certified Products.
Code Compliance at a Glance
Saves time and helps streamline inspection
Tested and Proven
Resilient siding that stands up to the harshest conditions
Third-party Verified
Validated by an accredited, independent certification body
Easy-to-Identify Compliance
No digging through stacks of paper or binders—save time by identifying code compliance reports with a simple glance. The VSI Product Certification Mark makes the Product Certification Listing and Product Evaluation Report reference numbers easy to see, so you'll know the siding you’re looking at is manufactured and tested to meet code with a quick look.
Accessible Reports
Our comprehensive reports are standardized to provide easy access to all code compliance information, with Product Certification Listing (PCL) and Product Evaluation Report (PER) reference numbers clearly identified. That means you get all the vital information you need at your fingertips, whether you’re specifying a job or inspecting a new build. Start searching now.
Independent Certification Body
Intertek is an industry-leading Total Quality Assurance provider, with more than 44,000 employees in over 100 countries ensuring the quality and safety of companies' products, processes and systems. They've been involved with the VSI Product Certification Program for two decades, and currently serve as the program's ISO/IEC 17065 accredited independent certification body.
The polymeric cladding
8 step certification process
The process begins with a plan
A manufacturer reaches out to the certification body and together they outline the product scope and testing/certification needs.
Samples are selected and plants are audited
The certification body visits the plant and documents the manufacturing process, selecting test samples to establish traceability.
Quality control documents are created
Quality control documents record how the product is manufactured, ensuring its consistency with what was tested during the qualification period.
The product is tested in a lab
The product is tested to the appropriate test standards by an ISO 17025 accredited lab.
Engineers perform a technical review
The certification body’s engineering staff verify the test data to ensure it meets certification standards, including testing lab accreditation, proper procedure and traceability.
It’s verified by an independent body
An independent review is conducted of all the elements—the process, engineer, and standards—to make sure the certification process was executed properly.
Certification is issued and mark is granted
Once official certification is issued, manufacturers are granted the ability to use a certification mark on their product. (Controls are put in place to regulate use of the program mark.)
Follow-up inspections are conducted
Regular unannounced plant inspections to manufacturing plants are done to confirm conformance to an approved quality control system, and to ensure products continue to meet standard(s) and code requirements.
The process begins with a plan
A manufacturer reaches out to the certification body and together they outline the product scope and testing/certification needs.
Samples are selected and plants are audited
The certification body visits the plant and documents the manufacturing process, selecting test samples to establish traceability.
Quality control documents are created
Quality control documents record how the product is manufactured, ensuring its consistency with what was tested during the qualification period.
The product is tested in a lab
The product is tested to the appropriate test standards by an ISO 17025 accredited lab.
Engineers perform a technical review
The certification body’s engineering staff verify the test data to ensure it meets certification standards, including testing lab accreditation, proper procedure and traceability.
It’s verified by an independent body
An independent review is conducted of all the elements—the process, engineer, and standards—to make sure the certification process was executed properly.
Certification is issued and mark is granted
Once official certification is issued, manufacturers are granted the ability to use a certification mark on their product. (Controls are put in place to regulate use of the program mark.)
Follow-up inspections are conducted
Regular unannounced plant inspections to manufacturing plants are done to confirm conformance to an approved quality control system, and to ensure products continue to meet standard(s) and code requirements.
Ensuring Code Compliance
The VSI Product Certification Program can help save time during building specification and permitting, as well as help to streamline final inspection by offering Product Certification Listings (PCLs) and Product Evaluation Reports (PERs).
Compliance for standard and specialized applications, including coastal construction, are clearly identified and easy to reference. Eliminate the need to rely on other types of code reports by utilizing the standardized PER and PCL code compliance reports that are available for retrieval at any time.
Certified Vinyl Siding
Complies with the ASTM D3679 product standard
Standards tested:
- Weatherability, wind load, and impact resistance
- Expansion and shrinkage
- Surface distortion
- Length, width, and thickness
- Rate of burn
- Lead
Certified Insulated Vinyl Siding
Complies with the ASTM D7793 product standard
Standards tested:
- Weatherability, wind load, and impact resistance
- Expansion and shrinkage
- Thermal distortion
- Length, width, and thickness
- Rate of burn
- Lead
- Surface flame spread
- Compatibility of adhesives
- Thermal insulation value
Certified Polypropylene Siding
Complies with the ASTM D7254 product standard
Standards tested:
- Weatherability, wind load, and impact resistance
- Surface flame spread
- Film adhesion
Building Code Officials
Access the information you need quickly with our guide to International, Florida and Canada building codes governing the use of polymeric cladding and other polymeric products.
Resources
Literature
Your Home Deserves the Best
Learn the important benefits of using a VSI Certified Installer.
Read MoreFrequently Asked Questions
Find the information you need fast about the Vinyl Siding Institute’s work—in advocacy, workforce training and certification, building code resources, sustainability and more—in our Frequently Asked Questions.
Featured Resources
The newest, best and most relevant information on vinyl siding products and performance. See our top picks below, or filter by type to find the resources you need now.
Brochure
Certified Insulated Siding — Quality and Comfort You Can Count On
Homes clad with certified insulated siding are assured that its continuous insulation will help prevent heat from escaping in winter and entering in summer through the exterior walls’ framing studs.
Read MoreBrochure
Polypropylene Siding — Certified for Performance
Like vinyl siding, polypropylene is another polymeric siding with its own unique quality standard and performance requirements. Learn more about how it’s certified with independent, third-party verification.
Read MoreLiterature
Vinyl Siding Installation Manual
Basic guidelines for vinyl siding installation. (Spanish version and French version also available)
Read More