Roof Building

Building a roof is probably not a good first-time project to attempt, but the ambitious home handyman can find resources to help get started. When hiring a professional, check your local better business bureau or consult with friends and neighbors who can recommend a competent contractor.

Construction Basics

It's critical to check local building code and permit requirements before beginning work. The last thing you need is to complete the job and discover that codes have not been met. Follow the specific safety rules for each tool and material you'll be using. Choose the appropriate tool for the job. Keep all tools sharp and in good working condition. Unplug power tools before changing blades or making adjustments. Wear heavy, soled boots on any construction site, and rubber soles when working on the roof; gloves while handling lumber; protective eye-wear whenever power tools are in operation. Wear ear protection when using power tools as some operate at levels that can damage hearing. Wear hard hats when working under or around overhead construction. Keep the area free from scraps and debris. Use scaffolding when working on high places.

Getting Started

Building a roof can be a daunting job, but you can cut it down to size by taking small steps. Start with the plans. Your plans should include slope, size and spacing of the rafters, length of the overhang, location and size of the ceiling joists, size of ridge beam, any other bearing beams, and the load weight. The construction of the roof begins with the framing. This can range from the simplicity of prefabricated roof trusses to the complexity of cutting and assembling a complex roof design from scratch. Roof trusses are a pre-built series of structural members designed to carry the load of the roof to the outside walls. The structural members are usually 2 x 4's or 2 x 6's. Trusses are ordered through your supply store and built in special factories to your individual specifications.

Sheathing and Beyond

Plywood particle board or wafer-board roof sheathing is the most commonly used material. It is low in cost and easy to install. Choose an exterior C/D grade. Thickness ranges from 3/8 to 3/4 inch depending upon local code. A nail gun is a valuable tool for this application. The next step is roofing felt, which acts as a waterproof barrier between the sheathing and the roofing material (shingles, etc.). A 15-30 lb. roofing felt is recommended. Apply the roofing felt (tar paper) to a clean, dry surface immediately after the sheathing is completed to protect it from the weather. Composite (asphalt), or fiberglass shingles, are the most common roofing now in use. A wide range of colors and styles are available to enhance the design of your roof.