How To Build A Shed Roof Over My Existing Deck
Unless youre experienced in residential roofing construction, you probably dont want to build the roof yourself. However, you might want to know the process of how its done. Take a look at our step-by-step guide for building a shed roof over your existing deck:
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What Should You Consider When Building Your Own Deck Cover
The first thing youve got to think about is how the deck roof is going to sit alongside your existing home. If your deck has a gap between it and your house, this might not be a problem as you can simply build a stand-alone deck cover. However, many decks are right next to the back of your house, which raises a few issues.
Joining a home-made roof to your existing roof might require a level of expertise that you dont really have. In this scenario, it might be a good idea to hire a professional to get the job done for you.
It will probably only be a couple of days work and might not cost as much as you think.
One alternative option that you can do yourself is to have a slightly higher roof on your deck, so that its above your main roof slightly, and overhangs.
That way any rainwater can roll off of your deck roof an onto your house roof, feeding into your main guttering system. Thats one of the main issues with building your own roof cover, where is the rain water going to go? If you have a roof at the same height, it will have to join somehow or else therell be a gap between the two constructions for water to come down onto your decking.
Some people also like the feel of having a higher deck roof, so this could be an option you might want to look at.
When you start building your roof over the deck, try and get some material that compliments the decking. You might want to use the same wood, or something else. Treat it with the same products to give it a similar finish.
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Beginning Construction On The Patio Cover
Early the next morning, the materials arrived at my house. Once the materials were unloaded, I began carrying the 10-foot-long boards and corrugated metal sheets to the backyard, laying them out in a pattern to roughly match how they would be assembled.
I also separated the corrugated metal sheets, wiped each one down with a light coat of vegetable oil, and then re-stacked them. This was something I had seen a neighbor do a long time ago when I was a child. I dont know if it served any purpose other than making me feel better. Its a step I probably could have skipped, but who was I to doubt the wisdom of the ancients?
Ledger Board Installation
Spreading & Fastening A Metal Roof Deck
The metal roof deck installation usually begins once the steel framing for the roof is completed. The level directly underneath the roof must be completed prior to beginning the installation of the roof.
The metal roof deck will cover the top level of the steel framing. This procedure is done in a few steps.
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What Is A Deck Roof
A deck roof is a roof that connects to your existing roof and covers part or all of your exterior deck. It can cover a screened-in area to create a porch or just act as a covering to your deck for shade and all-weather use.
A roof covering the deck is framed similarly to a house roof and connects mechanically to your house wall or roof. The roof is supported by beams and posts on the exterior, which are anchored to the ground not the deck structure with concrete to provide a stable foundation.
Install Identical Vertical Beams
Once youve decided on a roof inclination, install identical 6×6 beams the same number as the original 6×6 extending from the ground.
But before installing them vertically to act as an extension of the original 6×6 beams, first, intersect the uppermost parts of each rafter to have a 90 degree 8×2 on both ends where rafters that will form the roofs structure will lie on top.
Also Check: What Is A Flat Roof Called
Advantages Of Installing A Metal Roof
Among the roofing materials available in the market, metal roofing is one of the best choices you can make. It offers you the following extraordinary benefits:
- Energy efficiency: If we compare it with other materials like, for example, asphalt shingles, metal roofers provide the best results keeping your indoor temperatures at comfortable levels. They will keep your home cool during summers hottest days, thanks to their reflective properties. Besides, their reflective coatings increase their capacity to cooling your home. You can obtain up to 20 percent of savings in cooling costs since your AC unit will consume less energy to cool your home indoor.
- Wind and Fire Resistant: Electric storms and lightning can cause fire damage. But, the best defense your house may have against these natural phenomenons is a metal roof since they are fire-resistant. With an asphalt shingles roof, youll always have the risk of fire by causes like this.
On the other hand, the overlapping and interlocking of the metal sheets give metal roofing high wind resistance.
Likely Professional Builder Approach
A professional builder would usually achieve this by creating two columns beneath the new deck one at each end and putting beams across the top. If you are doing this on your own, it will be necessary to find a way of supporting these columns using either post-tension cables or pier blocks.
Then you need a platform constructed from planks laid at right angles which is able to take the weight of your deck with enough space between each plank for water to run off and a layer of insulation.
If there are any penetrations in this new platform for example, if you need to put in a post, column, or beam you will have to make sure that these are sealed against leaks.
A water-tight EPMD rubber membrane should be installed on top of the roof deck to prevent water infiltration.
Afterward, you will ensure you have installed sleepers or flat 2x6s laid flat on the roof before working with the decking. This will provide the surface for you to install the decking.
Read Also: What Is The Cost Of Roofing Per Square Foot
Tips For Purchasing Materials
Plastic & Pvc Composite
Composite decking costs $12 to $22 per square foot. Its strong, doesnt rot, and is easy to install. It boasts extremely low maintenance. There are various colors and textures to choose from.
Other features include:
- Clean with soap and water
- Doesnt need staining or painting
- Darker varieties will show weathering
- Can last up to 50 years depending on the variety
- Some come with a lifetime warranty
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How To Build A Roof Over An Existing Deck: Step By Step
In this guide, well go over how to build a deck roof over your deck. This step-by-step overview will cover the installation of a slanted deck roof. Gable and hip roofs will vary, particularly in how you connect their framing to your existing roof, but the construction of posts and beams will be similar to the slanted roof.
Selecting Materials To Build A Patio Cover
While looks are important, you want to make sure that the materials fit the structure. Since my patio cover was going to have a slight slope, shingles were out. A tar roof would work, but it would be a heavy smell like a BP oil spill. I decided on corrugated metal roofing because its resistant to high winds, is lightweight, and is structurally sound.
Using corrugated metal also allows me to reduce the degree of slope, or roof pitch, needed to a mere 10 percent, or a 1-to-10 pitch. This meant the patio cover could start at the edge of the houses roof at a height of eight feet and slope down to seven feet, leaving a clearance of more than six and a half feet between the lowest part of the frame’s headers and the ground at its outer edge.
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Install Post Base Connectors
After youve done your homework and received the proper permits, its time to start building a roof over an existing deck. The first step in this project is installing post-base connectors on all of the support beams for the deck. This will allow you to easily attach rafters as well as purlins once you install them later.
How To Build A Tin Roof Over A Deck
Bright sun shining down on you while you try to relax on your porch can be a bother. One solution is to build a simple tin roof that will not only block direct sunlight but will also provide protection from inclement weather while you’re occupying your porch and enjoying the outdoors.
A tin roof over the porch can provide aesthetic appeal and even the sound of rain hitting the tin emits a calming sound. Using strong, thick wood and proper fasteners, your tin porch roof will last for years.
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How To Build A Glass Roof Over A Deck
- Written by Michelle Keefe on Nov 13, 2010To ensure our content is always up-to-date with current information, best practices, and professional advice, articles are routinely reviewed by industry experts with years of hands-on experience.Reviewed by
Most outdoor areas and decks can be covered by a glass roof. By utilizing a glass roof, you can add décor, appeal, visibility, and openness to your space while also being protected from the elements such as rain. By adding a glass roof to your deck, you then have the option to convert the space into a conservatory, sunroom or even an outdoor entertainment area. You can create a functional and beautiful glass roof over your deck with little expense by using old or recycled windows. By utilizing old or recycled windows, you achieve the glass roof while saving money over large glass pieces or individual tiles.
Building On An Existing Deck
Where local building codes allow this practice, you can bolt a patio overheads posts directly to existing deck beams, joists, or other heavy structural members. Or, you can lag-screw through post bases and decking into the top of a deck joist or beam.
When bolting to the decks structure, be sure to use heavy-duty galvanized lag screws that are long enough to penetrate the decks framing by at least 2 inches.
In some situations, you may be able to use the homes structure to support an overhead above a deck. For a good example of this, see the article This Patio Roof Sheds Water, Allows Natural Light.
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Where The Patio Cover Attaches To The Roof
More detail about joining the patio cover to the existing roof.
Jed Fisher
This article is accurate and true to the best of the authors knowledge. Content is for informational or entertainment purposes only and does not substitute for personal counsel or professional advice in business, financial, legal, or technical matters.
Learn More About Our Deck Repair And Installation Services
When its time to add a roof over your deck, Mr. Handyman can retrofit one for you thats safe, meets local building codes and gives you a professional-looking result. One call to Mr. Handyman really does take care of everything on your to-do list, including that roof-over-deck project!
Make sure to stay on top of all your household repairs, improvements and maintenance needs and request service in your area or give us a call at
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How To Build A Roof Deck On A Pitched Roof
By: Author Ryan M.
Building a roof deck on a pitched roof can be tricky. There are many things you need to take into account before getting started, so its important that you know what youre doing.
The most beautiful thing is having a roof deck on your roof. If you are going to build a roof deck on your pitched roof, then you will want to know how.
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How To Build A Roof Over Your Deck
Installing a porch roof over an existing deck is usually not recommended unless the deck was originally designed to support a future porch. Typical decks are designed to support 55 PSF . Porch decks require 25 additional PSF for roof loads for a total of 80 PSF. As a result, most decks have inadequate footings to support a new porch roof. The footings for porch decks must be larger than deck footings. Many porches use 22″ + diameter corner and intermediate footings. Gable end porches will also require an additional footing in the center of the side rim to transfer the truss or rafter loads to the footings because the framing of the roof is perpendicular to the floor framing. Porch footings must be positioned on the perimeter of the porch to directly transfer the loads to the footings. Decks with cantilevered beams are not designed to support porch roofs.
A gable style porch roof addition.
