Loading

Parts of a Porch

 

Print Free Porch Plans

 
Porches consist of an assembly of parts much like decks. In fact, many porches are simply roof systems attached to a deck frame. Roof systems are generally built from rafters or trusses that are spaced in a series like joists in floor construction to create the form of the roof at a specified pitch. Rafters are hand framed from lumber and are attached to a center ridge beam using rafter ties and use a birds mouth attachment over the beam headers that support the sides of the roof. Manufactured trusses are preassembled and engineered to perform the same function as rafters. The roof framing header beams are held in place by support posts, which transfer the roof load to the deck frame and ultimately to the house and frost footing foundations. Support posts can be 4x4 or 6x6 and should not be spaced more than 5’ apart. A gable end rafter or truss uses webbing or studs to finish the front end of the porch. The front overhang of a gable roof uses a rake or ladder rafter that utilizes blocking to reinforce the projection. Collar ties or bracing can be used to laterally stabilize the individual rafter members.


Porch Anatomy
PinterestSave


The top of the roof frame is covered using tongue and groove plywood. The plywood is wrapped in roofing felt before adding 3-tab asphalt shingles. Roofs usually overhang a porch by at least 12” to properly shed water. Soffits and fascia are principal roof parts that are visible in the roof overhang. Fascia board runs vertically around the ends of the rafters in order to cap the ends and to hold the rain gutter. Soffits are built from a variety of materials and cover the underside of the roof overhang. Soffits can be non-ventilated or ventilated to allow cooling of the enclosed ceiling space. Ice and water shield and flashing should be used wherever necessary to prevent water from penetrating the roof system.

Screens can be fitted between support posts to allow air flow but to keep insects out. Electrical outlets and fixtures such as lights and fans can be installed to porch interiors. There are many ways to finish porches including installing tongue and groove cedar across the ceiling and back wall. Knee walls can be substituted for rails and operable windows and even skylights can be installed. Your imagination and pocketbook are your only limitations.


Popular Porches & Patios Articles
Porch Building

How to Build a Patio With Stone or Brick Pavers

Planning and installing a DIY brick or stone paver patio is a big project. Learn how to build a paver patio from start to finish here.

Patios

Backyard Patio Ideas and Inspiration for 2025

Transform your outdoor living space with our 2024 backyard patio ideas. Discover an array of materials such as concrete, brick, flagstone, tiles, cut stone, and gravel, each offering unique benefits. Whether you prefer modern, rustic, or traditional styles, find the perfect patio solution to enhance your home's charm and functionality.

Porches

9 Conservatory Design Ideas for Indoor/Outdoor Living

Conservatories are a great way to ensure that you (and your plants) can soak up the sun all year round. Get inspired with conservatory design ideas.

Next Step: Decking Articles
Decking Installation

How to Install Decking Over Existing Concrete Slab, Patio, or Porch

Discover the best techniques to build a deck over concrete, ensuring proper drainage and stability, while creating a beautiful outdoor space.

Decking Installation

What to Consider When Building A Wrap-Around Deck

Looking to add a wrap-around deck to your home but unsure of what the process involves? Check out this guide to learn more about top considerations when building a wrap-around deck.

Decking Installation

Tile decking

Installing tile over a standard deck frame in an exterior environment is a recipe for trouble.

Get more helpful resources delivered right to your inbox

Explore Articles by Topic

Popular Porches & Patios Articles
Porches

9 Conservatory Design Ideas for Indoor/Outdoor Living

Conservatories are a great way to ensure that you (and your plants) can soak up the sun all year round. Get inspired with conservatory design ideas.

Porch Building

How To Build a Gazebo

A gazebo can be a great addition to your outdoor space. Learn the basics of how to build a gazebo for your space at Decks.com!

Porch Building

Engineered & Premade Porch Roof Trusses

Using engineered porch roof trusses can take a lot of the hassle out of building your porch roof. Learn more about premade porch roof trusses at Decks.com!

Next Step: Decking Articles
Decking Installation

What to Consider When Building A Wrap-Around Deck

Looking to add a wrap-around deck to your home but unsure of what the process involves? Check out this guide to learn more about top considerations when building a wrap-around deck.

Decking Installation

Hidden Deck Fastening: 3 Ways to Fasten Your Composite Deck Boards

Hidden deck fasteners are the ideal option for DIY builders looking to hide their hardware, without sacrificing the stability of their deck. From nearly invisible deck plugs to color-matched deck screws, knowing how to choose and install these hidden fasteners is an easy way to level-up your deck project.

Decking Installation

Picture Frame Decking

Install a picture frame or perimeter board to finish the edge of your deck with style.

Get more helpful resources delivered right to your inbox

Explore Articles by Topic