By Patriot Home Service. Published: . Updated: . Published by Patriot Home Service.
Avoid treating two named products as equivalent without considering the complete assembly, installation details, documentation and warranty terms.
Avoid treating two named products as equivalent without considering the complete assembly, installation details, documentation and warranty terms.
For roofs, windows, siding and waterproofing, performance depends on the surrounding assembly as well as the visible product. Ask what underlayment, flashing, fasteners, membranes, accessories and substrate preparation are included. A product that appears comparable in a brochure may require a different installation detail or accessory package.
Ask whether the change relates to availability, cost, appearance, warranty or the design conditions. Record model numbers, manufacturer instructions, compatibility and intended performance requirements. Request a price credit or additional charge explanation, and confirm whether the change alters expected maintenance or service life.
When the agreement specifies a named product, have the proposed substitution reviewed and approved under the contract's change process. Retain written product information and photographs of labels and installed assemblies when accessible. Qualified design or engineering approval may be necessary on regulated or structural components.
A general construction comparison cannot certify that materials meet structural, fire, weather or code requirements. Seek a qualified designer, engineer or code professional when those questions arise.
These references provide supporting guidance and further reading. Follow current local requirements and the instructions for your exact products; some publications address particular materials, products or code editions.