Understand your roof underlayment options

START WITH YOUR QUESTION

How does the roof covering affect the underlayment conversation?

There is no single underlayment answer for every roof. Start with the covering, slope and proposed assembly, then ask how the specified product fits that installation. Tile, shingle, metal and membrane systems should not be treated as interchangeable.

What you can take away: Leave with questions matched to your roof covering and the documents needed to compare a proposal.

1. Identify the covering

   Use a safe photograph if you are unsure. Include mixed or low-slope sections.

2. Request a complete specification

   Ask for product names, applicable approvals and installation instructions.

3. Plan for the building’s use

   Discuss occupants, tenants, equipment and access before setting a schedule.

Use the free planning tool → · Explore the detailed guides →

Questions worth answering before you decide

Is a more expensive product always the best choice?

No. Suitability depends on the specified system and applicable requirements. Ask why the proposed product fits your roof.

Do commercial roofs use the same plan?

Not automatically. Covering, slope, drainage, equipment and operating needs affect the assessment. The number of stories alone does not decide the building’s use.

Check the original resources

• Florida Building Commission product approval search
• Tile Roofing Industry Alliance installation resources

General planning guidance. Product instructions and local requirements must be checked for the actual property. You can use these resources without submitting a request.