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29.01.2014 admin
When re-roofing your shed roof, you should make sure you have the proper ventilation to maximize the life of the roof. Next, install the SmartVent by bending at the routed hinge and having the uneven side of the vent placed against the wall and roof surfaces. It is recommended to install ice shield on top of the SmartVent extending up the wall about 12” to ensure a weather tight seal. Remove the plywood decking after the continuous cut and ensure the air flow is open from the shed wall vent to the soffit area. Nail the SmartVent similar to the eave detail and make it even with the bottom edge of the course of shingle next to be installed.
Apply a roll of ice shield on top of the SmartVent even at the lower lift edge and directly to the plywood above the vent. Install the shingles over the starter course as you would normally at the eaves edge and continue up the roof.
Porch or shed roofs frequently go un-vented, leaving excessive heat and moisture build-up that can lead to early shingle breakdown and roof damage. Quarrix Composite Roof Tile offers the classic, timeless look of clay roofing tiles but is lightweight and easy to install with superior performance. The choice of whether to add a roof to your container or not is made up of both personal preference for the style and also the cost. Because hot air rises, the majority of the heat lost in your home will be due to it escaping through your roof. A key point to take into account when making this decision is that having a roof means you can insulate inside of the roof which will help to maintain and keep the containers temperature consistent. To install a shed style roof on your shipping container you would first need to weld right angled steel plates across the length of the shipping container on both sides. Note: Your structural engineer will be able to advise you about the exact load bearing requirements needed for your roof. You now need to cover your roof; you can do this using either shingles, galvanized metal sheets or coated steel sheets. The construction of this roof is similar to the stages detailed above for how to install a shed style roof.
To install a gable style roof on your shipping container you would first need to weld right angled steel plates across the length of the shipping container on both sides. Again like the shed style roof you can either use shingles, galvanized metal sheets or coated steel sheets.
A flat roof, which the shipping container already has, can be more than adequate for most people’s needs. If you decide not to roof your containers a quick safety barrier would be to install a variant of tarpaulin sheet onto the roof of the container then overlay this with rolls of asphalt. Note: Whichever roof type you choose, make sure to work with your structural engineer to calculate the load bearing requirements of your roof. The dead load includes the combined weight of all the materials which were used to build the roof (i.e. The transient load is all the natural stresses placed upon the roof such as rain, wind and snow fall. Each local area will face different challenges, for instance, certain areas prone to high speed windows will need roofs with additional bracing for the trusses.
Also, whichever roof type you go for make sure there is ventilation to prevent condensation. There are many opinions about the benefits of and problems with roof venting, but it all comes down to proven rules of building science. Pizza's sister lives in a house in Bucks County, Pennsylvania, that was built in the mid-1980s. Now the house needs a new roof, and the contractor is recommending that Pizza's sister install a ridge vent. DanH is among those who think the best strategy is to block the gable vents and go along with the contractor's suggestion to install the ridge vent.
Despite Pizza's assurances that his sister's house has vented soffits, xxPaulCPxx contends they may not be large enough, or numerous enough. In snow country, ridge vents may be blocked by drifting snow during the winter and therefore unable to work correctly.

DanH says ridge vents remain effective in winter because winds generally clear the ridge within a few days of even a heavy snow, and because warm air working its way up through the attic will melt snow covering the vent.
DickRussell admits that under certain conditions, a layer of ice-encrusted snow can cover and block ridge vents. Kankan writes that his well insulated roof has no problem with ice dams, as long as the ridge vent is visible. I've had major ice dam problems the past two winters due to the ridge vents being completely block by 1-3' of snow for weeks at a time. If the idea is to get the attic to the same temperature as the outdoors, to avoid ice dams or heat transfer [into the house], the ideal system is no roof at all.
I presume, perhaps erroneously, you aren't going to create air merely based on the configuration of your vents. To qualify that, if heat does tend to rise, you would want to plan to take advantage of that fact. When installing a new roof and siding, the standard application of SmartVent on the shed roof is having the exhaust ventilation closest to the shed wall is always the most desired.
The easiest way to accomplish this is by using SmartVent as an off-wall shed exhaust.Ventilating the shed roof without removing the existing flashing and siding off of the shed wall means one less hassle and one less chance of having the expense to replace the wall siding and losing the bid.
Fabric is not required on the section of SmartVent attached to the wall, only the roof area). The smooth side will be showing and nailed at 2” in from ends (along the black nail line in the fabric) and two nails evenly spaced between them.
If tarpaper was already installed, gently tuck the ice shield under the higher course of tarpaper so it laps over the ice shield by at least three inches or more.
If no dealer is located near you please give us a call at 1-800-622-4455 and we will be happy to locate a dealer for you. Quarrix Multi-Use Vent has proven performance for shed applications to achieve the industry-recommended balanced system for ventilation on porch or shed roofs. Our ridge vent and multi-use intake ventilation products are the key to proper attic ventilation, and are essential to achieving a balanced ventilation system. Sign me up for free emails from Fine Homebuilding with the latest news, tips, and techniques.
Rose of the Building Research Council replies: As strange as it may seem, the right way to vent the top of a shed roof with a wall going upward from it is not venting it. Clearly not roofing your container will save you money initially, however in the long run installing a roof and insulating it could save you money in energy bills. Also having a roof which has an overhang keeps the rain from running down onto your windows and removes the need for a drip bar above the windows. The advantages of using a shed style roof are that it is extremely cheap and very simple to build; a roof like this could be made and fitted in a couple of days. On each side of the container roof you can then fix a wooden beam into the steel plates; this beam will be used to screw the trusses into.
This figure varies regionally as it takes into account natural stresses imposed on your roof such as rain, wind and snow loads.
Coated steel will be the most durable however galvanized metal sheets are very easy to fit and are also quite durable. A gable styled roof is what most people imagine when you think of a traditional home; it has the distinguished triangle look. On each side of the container roof you can then fix a wooden beam into the steel plates; this beam will be used to screw the trusses into (shown below). Although it’s clearly cheaper not to roof your shipping container this does leave you susceptible to pooling on the roof. Whereas, warmer climates with a little breeze could use a roof with very little structural capability and more for the insulation benefits. Read the discussion below to see what builders and homeowners are typically dealing with, but then read A Crash Course in Roof Venting to find some proven roof-venting solutions. Like many others of the era, the house has a gable vent at each end of the attic, along with soffit vents at the eaves. I had to completely replace the ceiling in my master bedroom last fall, only to see it get ruined again just a few months later in last winter's heavy snowfall and long periods of frigid temperatures.
No amount of attic insulation will prevent ice dams from forming when there is zero ventilation.

Electrical exhaust vents in combination with soffit vents and ridge vents will work in all climates and all weather conditions. Wrap the remaining fabric tightly over the top of the SmartVent even with the shingle end and nail. If you have any questions or comments on installation please call 1-800-622-4455 and ask for a roof ventilation technician to assist you.
I used Prop-a-Vent air chutes between the rafters and standard soffit vent strip, but the corners of the roof shingles are curling under. There are a few instances where venting is counterproductive, and this case is one of them.
Next, screw your trusses into the wooden beams and the roof’s basic structure is starting to take place. This will allow air to pass through the roof and avoid heat traps and condensation which causes rust.
The advantage of using a gable roof is that it has a sloped roof so provides great water drainage; this makes it less likely to experience any leaks and helps extend the life-span of your roof. The soffit vents are kept open from being blocked by insulation with rigid foam baffles between rafters inside the attic. Fortunately, I learned from the previous experience, and immediately cut drain holes in the ceiling this time to prevent tens of gallons of water from pooling and pulling the blue board off the strapping.
I was wondering if it is normal for a mist to come through when we have driving, lateral rain.
Remove roof decking and ensure there is at least 1” of clear space between roof decking and header board. Other instances include rafter bays above and below skylights and cathedral ceilings that terminate in a valley.The problem with venting a shed roof that meets a wall is that the building aerodynamics almost guarantee snow and rain entry through any opening placed at the juncture of the roof and the wall.
The soffit board should have at least an inch air gap in the middle of it covered with wire mesh; this allows air to flow in and out of the roof. What is the proper way to ventilate the high end of cathedral-ceiling rafters when they butt into a carrying beam? You’ve probably noticed snowdrifts piling up at this juncture on other houses as well as your own, and a good rule of thumb might be never to place a vent in an area subject to drifting snow.
The exterior roof has ice blankets under the exterior shingles extending up the roof well beyond the soffit area.
Complete the shingling to the slit cutout but ensure the shingles do not cover the cutout opening.
Several years ago, a representative for a vent manufacturer told me that he cringed with every sale of a shed vent because of the frequency of callbacks from water damage.A high vent probably won’t help with the shingle-curling problem. Asphalt-shingle products are more strongly affected by ultraviolet radiation than by roof temperatures. I suspect that your shed roof faces south, where the ultraviolet radiation is the most intense. Also, the sheathing temperatures even on fully vented cathedral ceilings are low toward the eaves but quite high toward the ridge or high point of the shed roof.The roof system that I prefer for this application is a “compact” roof assembly, which is standard construction for low-slope roofs throughout North America.
The compact roof is an unvented system that incorporates a layer of closed-cell foam underneath the roof sheathing and should provide satisfactory performance in any climate.
In seismic areas the foam layer has to go over a layer of plywood to give the roof better structural integrity. Most shingle manufacturers offer warranties on their shingles only when they are installed on a vented roof, but with a compact-roof system, they might grant an exception. Two-by furring is then placed on top of the membrane in line with the rafters, and a second roof, vented at the high and low points, is installed over the first.
Water that enters the vent slot at the top should drain outside at the low end of the roof.

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