Learn how to measure the total square footage of a residential steep-slope house roof in this InterNACHI home inspection training video for contractors and inspectors.
Perfect! I want to thank you Sir for simplifying which in some cases can become a complex process. You have made it easy for me to calculate the square footage of my roof and converting that to the number of squares needed.
Man thank you after watching you break down every formula I realized on certain roofs I was only doing it half right, thanks for being precise in your explanation of the diagrams. One thing that did confuse me is when you said measuring a hip is base x hight, x1 half and that's your answer. Actually it's base x hight then divide your answer in half. Again thank you for breaking down how to measure the different roofs. My name is Jim Adkins I'm on my wife's you tube page. I work for durst roofing in Youngstown Ohio
Ben this video most definitely refresh my memory, I almost grab my pen and paper and started to make up my own measurements 😂😂. Thank you for making this video. Very easy. Very simple
Omgosh, thank you, thank you, thank you.. This is exactly what I was looking for. Now I can go backup and measure my own roof correctly and accurately. Well as soon as the snow is gone. This has been very valuable. Now if I can just figure out how to sketch it in Xactmate with all the different roof elevations!! One step at a time!!! Thanks again!!
Ben, great information and refreshers. However, I need to be refreshed as to how to do measurements without the roof plans, using the elevation plans. Do you have a tutorial for this?
Excellent excellent presentation I sell renovations and roofing I'm still in the learning curve of how to measure roof properly this is very helpful thank you
Could you combine the overlap of A3 gable and main house as (60x10) and do the remaining gable as rectangular measurement (10x10) to avoid the subtracting step? Thank you for the very informative video.
A software package has been developed to make such measurements. But knowing how to do this manually is necessary. Knowing the basics first is necessary in any profession.
Nick, multiplying something by 1/2 or dividing by 2 equals the same number... Example : 100 divided by 2 = 50 or 100 x .5 (1/2) = 50... So, you can do it either way...
Most welcome 😊. Thanks for watching. Interested in becoming a code inspector? Check out our free online course at forum.nachi.org/t/new-free-online-course-to-become-a-code-inspector/185930.
Yes expanding on what Eric Brennan Said when talking about trapezoid in the beginning you said Base 1+Base 2 divided by 2 at the end you in the final summary of all the calculations it says Base 1 + Base 2 x 1/2 and at the end you say the same thing but it shows Base 1+Base 2 divided by 2. Which one is it? Can you please correct this or can someone comment or leave a video note?
When you do trapazoids that are equal in length you dont need to multiply by .5.....16.3+10*5 gives you the square feet for both. What happens is when you divide by .5 you are just getting one side and then you do the same for the other and then add them, seems redundant. None the less great video, I learned something new today
This works in simple roofs like a shed roof home but when you have gables and eves and rakes it's tougher I use this sky measure software whe 're you pay 40 to get the aerial Square footage of a home only thing it's not always guaranteed if there's alot of trees covering the home that's the only disadvantage
So the software that I'm using is Sky measure powered by core logic, so 80% of U.S. homes sold are included in property imagery, averaging 9 images per home so more than likely it could definitely save you time and money their fees vary I haven't paid but 40$ per home we've done, but it saves a ton of time in the long run they also have an app for easy login access
In regards to the trapezoid measurements: At time 3:06 you stated (B1 + B2) x H) / 2 to get the sqft. Then at time 6:06 you stated (B1 + B2) x H) x 1/2 to get the sqft?? Which one is correct??
There is no need for this complexity in calculating the area - it is simply 60x10x2 = 1200 20x10x2 = 400 10x5x2 = 100 6x5x0.5x8 = 120 Total 1820 It is hard to believe that home inspectors would need training on such a basic estimation.
It's far beyond the scope of a home inspection to measure the squares or area of a roof covering. The scope of a home inspection is primarily based upon identifying indications of defects, not estimating or measuring areas of roof covering materials. That job is for the roofing contractor that would be recommended by the home inspector in their inspection report. But we do our best in training our home inspectors on just about everything a contractor would need to know.
Ben, when you show the East gable at 6:08 in the video you explain the base as 2 different lengths. Why do you show 10 foot and 16.3 and not just a 3rd line showing 26.3 length total. This looks confusing when looking at the roof design. So what your saying is that from the edge of the main roof to the end of the gable is 10ft and the triangular portion length is 16.3 feet? why would you double a length just to subtract the triangular portion. Couldn't you just measure the triangular parts of the roof and do it separately? Then subtract the triangular portion from the main portion of the house? it confuses me how you take two lengths add them together then do your base X height X 1/2. Please let me know why its done this way
Ben Gromicko oh my goodness. I saw it as 2 bases of 10 and not 2 separate bases due to the triangle outlining on the roof example. I see where you are coming from now
Lol the lazy stupid modern American worker Vs the old Disappointed jerk Old School worker who complains about the new generation Or the Hispanic workers. That’s what construction is today
The calculation is not A1, A2 and A3 is not as complex as described. It is simply 60x10x2, 20x10x2 and 5x10x2 or 2100 total. No need to add and subtract the common triangles.
Home inspectors may report degree of slope in their inspection reports, but it's not required by the Standards of Practice for Performing a Home Inspection. I submit that most home inspectors would use a ratio to express slope instead of a degree, such as 2:12 or 4:12.
+Ben Gromicko if I measure a roof let say 1000 sq ft I add 10% waste for a gable roof and 15% waste for a hip roof otherwise I would be short on material
We have Certified Master Inspector® Instructors who provide online and live classes about roofing. You may be interested in the roof training resources at www.nachi.org/3c.htm
Okay, Magdalena. I'm not sure what you are trying to say. But if you want to take the online exam again, you may. Our online inspector exam can be taken again and again, as many times as you want. Members have unlimited access to all of InterNACHI's free, online training and Continuing Education, our recommended list of home inspector courses, our free certification programs, the members-only forum, amazing membership benefits, the Online Inspector Exam, our free Inspector Training App.
So going by this equation for hip roof I only need 1.5 square for one trap, b1 42ft b2 15ft H 15ft, b1 plus b2 x H ÷ 2 for one trap. I need 5 sheets of plywood for bottom course, that 1.5 sq of shingles, total thumbs down
Hi, Michael. If you new to the roof inspection business, you may be interested in the online roof training courses we have made available for free to our members at www.nachi.org/3c.htm
I've measured alot of Roofs, in my day. I personally think; you made this sound, more complicated, then it really is. Your graphics, for the trapezoid, were useless. I stopped watching there.
