A Thorough Walk-Through Of SpacingTool.com (Part 2)

Welcome to Part 2 of our walk-through of SpacingTool.com. In the last step, we had selected the type of attachment we were going to use for our snow guards. We had chosen the adhesive mounting method, which utilizes Surebond SB-190.

The next step of the SpacingTool process is entering the dimensions of your roof areas. Our test roof is a simple 2-sided gable roof. As such, each side of the roof is considered a single roof area. Inputting the dimensions for only 1 roof area will give you half of the guards that you would need for the entire project. If we had a porch roof on the gabled end of our test building, then we would have 3 roof areas and so forth.

11110369_384616685056797_2108357929576188652_o1At this point, SpacingTool is going to ask you to input the dimensions for your project’s different roof areas. The first dimension it is going to ask for is the roof pitch. If you have the plans for your building, this dimension will often be found on the elevation drawings. If this is not an option, roof pitch can be found manually by measuring your roof’s rise and run. The first step is to place a ruler (or other measuring tool) so that it faces away from your roof panel horizontally. Measure along your ruler 12” out from the panel. Using a 2nd ruler, measure the vertical dimension between the 12” mark of the first ruler and the roof panel. For our test roof, our vertical dimension was 7” from the horizontal ruler down to the roof panel. This dimension will then be expressed as a 7:12 roof pitch.

roof-pitchSpacingTool will now ask what “Roof Shape” you are dealing with. For our test roof, we are using rectangular roof areas, but if we were using a hip roof, then we would need triangular roof areas additionally.

The next dimension that SpacingTool will ask for is the “Panel Run”. This is the diagonal length of the roof area from the peak to the eave edge. This dimension can be determined on smaller roofs by simply measuring along the length of the roof panel. On larger roofs, we recommend the use of an online roof run calculator, such as this one by APB Pole Barns. http://www.pole-barn.info/roof-rafter-calculations.html. This tool will ask you the width of the building and the pitch. Once you enter those dimensions, it will calculate the pitch of the roof for you. Our test building has a 50’wide x100’ long footprint and we already know our roof has a 7:12 pitch, so let’s see what the calculator comes up with.

run calcAccording to the calculator, the roof run for both roof areas is 28’-11 5/16” long. Round up to 29’

The final dimension is the Eave Length. This can be measured easily by following along the bottom edge of the roof areas. Our test building is 100’ long.

dims2Now that we have all of the necessary dimensions, it is time to enter them into SpacingTool. Our test roof is the same on both sides, so we will need to enter our dimensions twice (once for each side) and then click “Save”.


In the next step, you will be asked to input your contact information and some information about the project such as its location and zip code. Stay tuned for Part 3, as we finish our layout calculations for our roof’s snow guard installation.

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