• Two components to a roof: the tile type and the underlay.
• The felt underlay is the most important providing real protection from the elements.
• Tyler explains the types of felt underlay and how 2 layers of underlay can double the roof lifespan.
• How to inspect the underlay: Keep in mind ‘a pitched roof is designed for water shedding, not waterproofing.

COMMENTARY

• Discussion of the flat roofs.
• The history of some of the flat roof products.
• Built Up Roll Down involved hot tar.
• Torch down method.
• Foam roofs impervious to everything except sunlight.
• Elastomeric coatings.
• Main purpose of tile roof is to protect the underlay. Cracked or broken tile can slowly damage underlay.
• Proactive way is to have your tile roof inspected. Reactive way is wait for the leaks to start.
• Tile roofs are not all nailed down. Tyler explains.

Check out our Rosie on the House Science Of Roof Tarping video series featuring:

• How To Tarp A Concrete Tile Roof
• How To Tarp A Shingle Roof
• How To Tarp A Flat Roof, as explained by Tyler Johnson of Johnson Roofing

COMMENTARY

• Takeaways include the importance of felt underlay, tile roofs are higher maintenance than shingle, once a year inspection on roofs can save you money in the long run and extend your roof’s life.
• Johnson Roofing has a roof maintenance program on their website.