Find out the cost of roofing for your house Learn more



Your roof provides protection to your home, belongings, and loved ones. For those reasons and many others, it’s important for homeowners to ensure their roofs are still capable of withstanding the elements.

GreenCal Construction provides eco-friendly roof installation and roof replacement services to homeowners throughout Fullerton, Bellflower, and the surrounding Southern California area. As a full-service roofing contractor, we provide an array of services, including roof inspections. 

GreenCal Construction is a local, family-owned roofing company with a focus on eco-friendly home improvement. We pride ourselves on using green building practices with support from environmentally responsible manufacturers.



Shingles are the most cost-effective option when it comes to roofing systems. Roofing manufacturers such as GAF and Owens Corning continue to push innovation and design producing great quality products and aesthetically pleasing shingles such as Owens Corning Woodmoor/Woodcrest line.   


Tiles themselves can last longer than a lifetime, though what’s underneath may not. Tiles require routine washing and tile relays. 

Traditional tile also known as Heavy Tile was not an option for most homeowners before products such as Eaglelite hit the market. Going from composition shingles to tile is added weight on a structure of a home, creating a process of plans, engineering, and construction costs. We have now been able to create a smooth transition between roofing styles. 


Flat roofs can be the most costly to replace as great products are required for a 10 to 15-year system but they can also be the most cost-effective if taken care of properly. 


Not sure what makes up a roof besides shingles? Use our numbered roof diagram to familiarize yourself with the common parts of a roof and its layers so you can confidently communicate with your roofing contractor during your next roofing project.

Diagram: Anatomy of a Roof – common parts and layers of a residential roof with asphalt shingles

What are the common parts of a roof?

  1. Roof Ridge: The roof ridge, or ridge of a roof is the horizontal line running the length of the roof where the two roof planes meet. This intersection creates the highest point on a roof, sometimes referred to as the peak. Hip and ridge shingles are specifically designed for this part of a roof.
  2. Ridge vent: A ridge vent is an exhaust vent that runs horizontally along the peak of the roof allowing warm, humid air to escape from the attic. Use our ventilation calculator to calculate your attic ventilation requirements and determine how much exhaust ventilation you would need to properly ventilate your roof and attic.
  3. Flashing: Flashing is a metal material installed at joint openings, around chimneys, and any dormer windows or skylights to help prevent water intrusion. You may recognize flashing as metal stair steps alongside a chimney or side walls on a roof.
  4. Hip: The hip on a roof is the intersection of two roof planes that meet to form a sloping ridge running from the peak to the eave. Hip and ridge shingles are specifically designed for this part of a roof.
  5. Roof Deck: The roof deck is the structural foundation base for the roof system and is usually made of wood or plywood.
  6. Roofing Underlayment: Roofing underlayment is a layer of material, usually synthetic or felt, that adds extra protection on top of the roof deck and under the shingles. Synthetic underlayment helps repel moisture and provides protection against water infiltration. Synthetic underlayment is becoming a popular material choice over felt due to proven water-resistance performance and long-lasting durability.
  7. Roof Valley: The roof valley is the V-shaped intersection between two sloping roofs joining at an angle to provide water runoff.
  8. Laminated Architectural Shingles: Laminated architectural asphalt shingles contain more than one layer of tabs to add dimension, performance and durability to a roof. Architectural shingles are sometimes referred to as three-dimensional shingles or laminated shingles. The opposite of architectural shingles are three-tab shingles, which are produced as a single layer of tabs and appear flat or without the dimension of a laminated shingle.
  9. Roof Gable: A roof gable is the triangular section of the outer wall at the peak of the roof between a sloping roof and eave. A roof gable is sometimes referred to as a rake.
  10. Metal drip edge: Metal drip edge is a narrow strip of noncorrosive metal used at the rake and eave to help manage dripping water by facilitating water runoff to protect the underlying section of a wall.
  11. Dormer: A dormer is a raised section of the roof. Dormers commonly contain a window that projects vertically through the slope in the roof.
  12. Ice and water barrier: An ice and water barrier is a self-adhered waterproofing material installed along eaves, valleys, side walls, and other sensitive areas to protect against ice damage and wind-driven rain.
  13. Eave: An eave is the lower border of the roof that overhangs the wall usually located in the first three feet of a roof.
  14. Undereave vent: Undereave vents are intake vents located under the eaves of the roof that help draw cool dry air into the attic. Again, you can use our ventilation calculator to calculate your attic ventilation requirements and determine how much intake ventilation you would need to properly ventilate your roof and attic.

Now that you’re familiar with the basic anatomy of a roof, you’ll start to notice dormers and gables everywhere you turn. More important, you’ll be equipped to have an informed conversation with your roofing contractor when the time comes for you to get a new roof.

To learn more about roof layers and components that make up a complete roofing system, visit our Total Protection Roofing System® site section or ask us for more information. 


At GreenCal Construction, we pay attention to your needs and the requirements of your project, ensuring your 100% satisfaction throughout. From the inspection to the completion, GreenCal Construction does the work on time and according to your exact specifications.

Get a quality wooden fence that improves your home’s security and enhances its curb appeal.

Schedule a roof inspection today by calling (714) 790-1750


  •   I've shopped around for 9 months & finally found a great roofing company. Value, quality & quick response are my 3 words to recommend this group of professionals.

    thumb Jose A.

      When finding someone to replace my roof - I needed a roofer that could help me cool down my home. I have a flat roof with no attic so it... read more

    thumb Miguel J.

      Very pleased with the roofing project. They provided quality service and made to sure to answer any and all questions we had. Would recommend!

    thumb Filiberto P.
  •   When looking for a roof installer for my parent's home, I did a ton of research and GreenCal checked all the boxes. They are licensed and insured, have great reviews,... read more

    thumb Pam G.

      I got my roof redone and my exterior stucco redone. Greencal offered a "bundle package" that not only was more cost effective for me but made scheduling so efficient since... read more

    thumb Jeff K.

      Thanks to everyone at Greencal for a pleasant, professional, transparent and timely customer experience from start to finish. Shout out to Anthony and Crystal who answered all my questions and... read more

    thumb Regina R.
  •   Great service, timely, great products. Super happy with my new roof. Ask about their financing programs. Really helped me out allowing me to get my roof sooner than later!

    thumb Thicc H.

      I hired Greencal to reroof my home. Since we just moved into this property we had to be strategic and careful about financing a major project like this. It was... read more

    thumb Jennifer P.

      Word of advice for my fellow homeowners looking for a roof! Do NOT wait till rainy season to get your roof redone. I did that this past winter and everyone... read more

    thumb Taylor R.
  •   Greencal Construction did an awesome job in my clients home. We needed someone fast to do a roof Greencal came the next day for an estimate and immediately set it... read more

    thumb Mor M.
Our professionals will contact you within the next couple of hours!