Avoid catastrophic structural damage and loss of revenue from an improperly installed shingle roofing system. Knowing how a shingle roof is installed will help you do it or get it done right the first time.

atlantacommercialroofingcontractors.com gathered the following information and tips about how to properly install a shingle roofing system on your residential or commercial building.

Laying Shingles

Shingles protect sloping roofs and the structure beneath from the effects of rain, snow, and hail while providing an attractive covering for the structure. Installing an impermeable roofing layer of shingles is an efficient way to avoid leaks and structural water damage. Proper shingle installation will provide you with 20 to 30 years of unwavering protection. Consider the following steps and tips:

1. Remove or “Tear Off” Your Old Roofing System – Removing your old roofing system allows you to thoroughly inspect the structural integrity of the roof deck and make any necessary repairs before moving forward. For new construction, the roof deck should be inspected before installing a roofing system on it.

Do not proceed with any roofing activities (Tear off or installation) until all applicable permits have been acquired by you or your roofing company. Failure to obtain these permits may result in the forced removal of any and all unpermitted work performed.

2. Verify or Instal Insulation – This component is not actually on your roof but underneath it. In your structure’s attic is or should be installed a crucial layer of insulation. This insulation minimizes internal heat loss and protects the multiple layers of your roof from extreme temperatures that can quickly damage and break down roofing materials.

3. Verify Attic Ventilation – Ventilation allows hot, moist air to escape from your attic instead of being trapped underneath your roof. Ventilation problems can result in mold and severe damage to your roofing frame and deck.

4. Inspect or repair the Roof Deck – Resting on the structure’s framing is the roof deck. Sheets of plywood typically make up the deck, connecting and stabilizing the trusses and joints of the framing, providing a solid and secure surface to layer the rest of the roof onto.

5. Instal a Water Barrier (Underlayment) – There needs to be a protective waterproofing layer between the roof deck and shingles. This water barrier is an adhesive layer applied directly to the roof deck, which protects against water infiltration from melting ice or wind-driven rain.

6. Instal a Starter Strip – A starting layer or strip of shingles lines the edge of every shingle roofing system. This component is laid down beneath the underlayment to seal the roof’s edges. This layer is meant to defend the rest of the roofing system against strong winds and reduce or eliminate shingle blow-off.

7. Shingle Installation – Shingles protect your structure from the sun, water, and other weather conditions. The granules on shingles are typically made up of fiberglass, providing form and strength. Here’s how to install or “lay” them:

• Lay the first row of shingles directly covering the narrow starter strip
• Lay the second row of shingles offset to facilitate drainage and provide structure
• Shingle around stacks, vents, and chimneys as necessary
• Interlace the flashing and shingles around the chimney

Repeat this process, moving up the roof deck until reaching the roof ridge.

Note: Shingles can be made from wood, slate, flagstone, metal, plastic, and composite materials like fiber cement, fiberglass, and asphalt.

8. Instal Flashing – Flashing is typically made from sheet metal and is installed where seams are located (valleys, walls, chimneys, etc.). Flashing is installed to prevent water from penetrating and damaging your roof.

9. Instal the Ridge Cap(s) – This is a shingle (or series of shingles) that runs along the ridge line of a sloped roofing system. It’s installed over the joint of two edges and keeps rain and snow from seeping or running into the roof. Ridge caps also allow heat and moisture to escape from the attic space.

Tip: Inform yourself about the shingle manufacturer’s installation requirements (spacing, attachment method, underlayment, and inspections) to preserve material and installation warranties.

Roofing System Installation

When quoting a roofing installation, repair, or replacement (assuming you will not do the work), be sure to thoroughly vet the bidding roofing companies. Consider asking the following questions:

• Are they licensed to operate in your area?
• Is the company bonded?
• Are they insured?
• How long have they been in business?
• Does the roofer have references?
• What warranties are available?

Tip: Read and consider customer reviews and complaints, then inquire about how the company handled or resolved them.

Shingle Roof Installation

In this article, you discovered shingle roofing system information and tips to help you properly install a shingle roof on your structure.

Proper roofing installation is essential to protect your building and ensure that the roof has the longevity to reach its full potential lifespan.

Prevent poor or incorrect shingle roof installation that leads to leaks, costly structural damage, and eventual catastrophic roofing system failure.

Sources:
et.byu.edu/~bcc32/CM211/notes/roofing/ShingleInstallation.pdf
pages.drexel.edu/~kms35/roof_components.htm
rmrc.wisc.edu/ug-mat-roofing-shingle-scrap/
checkbook.org/v2/docs/roofers/all-areas-roofers-parts-of-a-roof.pdf

See How To Roof with Shingles for the first version of this content.

Without knowing the basic components when having your roof repaired or replaced, an unscrupulous roofer can take advantage and charge you more money than necessary. Knowing the various parts that compose a roofing system will help you understand the work being done, and ensure you are treated fairly.

atlantacommercialroofingcontractors.com gathered the following information to help you gain a deeper understanding of the complexity and needed parts of your home’s roofing system.

Parts of a Roof

The following are 18 parts of a shingle roofing system and their purpose:

1 – Ridge Board

This is the wooden or metal board that runs along the peak of the roof. Rafters and trusses connect to the ridge board, creating a cohesive framework for the roof.

2 – Collar Beam

A collar beam is a horizontal beam that connects two rafters that intersect at the ridge.

3 – Solid Decking

This decking is composed of solid materials, is strong and stable for bearing potentially heavy loads.

4 – Rafter

One of the multiple diagonal members of the truss that meet at the apex to support the roof deck and its load.

5 – Felt Underlayment

This layer of material is a waterproofing layer made of regular felt. It is stacked above the solid decking board and then covered by shingles or preferred roofing materials.

6 – Shingles

Shingles are the roof covering typically flat and cut or molded into rectangular shapes. Shingles can be made of multiple materials like slate, wood, stone, plastic, metal, and composite materials.

Suppliers can offer shingles in a wide variety of shapes, sizes, and colors.

7 – Chimney

The vertical structure penetrating through the roof that is responsible for safely ventilating smoke and combustion or residual gases from a fireplace, boiler, or stove (wood-burning or gas equipped) to the outside environment.

8 – Chimney Flashing

A waterproofing seal installed at the penetration point of the chimney through the roof and used to prevent moisture infiltration.

A small structure called a cricket may also be installed on the raised side of the chimney to prevent moisture and debris from gathering and damaging the roof or chimney.

9 – Vent Pipe Flashing

This installation is weaved or layered into the shingle pattern preventing damage from water seepage into the roofing system.

10 – Spaced Sheathing

Spaced sheathing, also called skipped decking, refers to the type of decking identified by boards running horizontal to the rafters with a 4”- 6” space between them.

11 – Valley Underlayment

This waterproofing layer protects roof valleys from ice and water damage.

12 – Valley Flashing

Valley flashing is a waterproofing seal installed along valley lines.

13 – Lookout

A lookout, lookout rafter, or roof outlooker is a joist that extends in cantilever out from the exterior wall (or wall plate) of a structure, supporting the roof sheathing and providing a nailing surface for fascia boards. When not exposed, it can serve to fasten the finish materials of the eaves.

14 – Fascia

The fascia is the often attractive board along the side of the overhang and the roof that helps your roof have a completed appearance. Your gutters will sit atop your facia board. The fascia is sometimes called a “transition trim” between the home and the roofline.

15 – Rake

A rake board covers the top edge of siding where it meets the roof or soffit if there is an overhang on the gable end. A rake prevents rain from running behind it.

16 – Gutter

Gutters are the horizontal metal (typically aluminum) part of the water drainage system that are usually installed along the eave edges of your roofing system, or along roof features like dormers. Gutters are open at the top to collect rainwater flowing off the roof, then directing it into the downspouts.

17 – Down Spout

The primary job of gutters and downspouts is to collect water from the roofing system during rainstorms (or from melting snow) and safely divert it away from the foundation of the structure.

18 – Splash Block

Splash blocks are rectangular pieces of plastic or concrete located beneath the end of downspouts. Splash blocks are used to direct water as far away from a structure as possible while preventing soil erosion, eventually causing foundation issues.

While there are many more components that compose a roofing system, knowing the 18 listed above will give you sufficient dialog to properly address and negotiate eventual roof repairs or replacement.

Understanding What Makes a Roof

In this article, you discovered 18 roofing components that are fundamental to the proper functioning of a sloped, shingle roofing system.

The ability to address your roofing system issues directly with your roofer in clear and concise vocabulary will help you get the work done that you need.

Not knowing how to communicate your roofing system issues clearly can result in expensive, unneeded repairs, compounding existing problems, or the risk of being taken advantage of and overspending.

Sources:
goconstruct.org/why-choose-construction/whats-happening-in-construction/what-are-the-different-parts-of-a-roof-and-what-do-they-do/
checkbook.org/v2/docs/roofers/all-areas-roofers-parts-of-a-roof.pdf
asphaltroofing.org/asphalt-roofing-systems-components/

See 18 Parts of a Roof and What They Do for the first version of this content.