How roof material substitutions should be reviewed

A proposed substitution may change the assembly, appearance or product documents. Ask who must approve it and what updated information is needed.

Identify the exact proposed product and compare it with the specified assembly. Have the responsible parties record approval and verify that the installation details and project documents reflect the change.

Contact Dekoven Roofing with the current plans and the project schedule to discuss a roofing bid.

Substitutions need review

A substitution replaces a specified product with another. It may be reasonable, but it should be reviewed before it is accepted.

Questions

• Why is the substitution proposed?
• Does it meet the same performance requirements?
• Does it affect warranty?
• Does it change appearance?
• What is the cost difference?

Get it in writing

Approve substitutions in writing with the designer or owner involved, and keep the documentation with the project file.

Ask

Who approves it? Who is responsible if the substitution causes a problem?

Frequently asked questions

Can a roofer substitute on their own?

They should get approval first.

Does it change the warranty?

It can. Ask.

What if supply is the reason?

Ask for equivalent options and compare.

Related: Ask about a roofing bid