ArcaMax

You may think that YouTube is an oasis of helpful home improvement videos. After all, anyone with a smartphone can upload a video in seconds. Each week I scour YouTube for videos I feel may help you save time and money. With each passing day, I’m convinced that YouTube is a cesspool of bad advice. For every decent video that contains good information, I see 20 or 30 that are created by fools.

Allow me to share a few examples. There are a disturbing number of videos showing an easy way to create concrete walkways, sidewalks and door stoops. The uninformed folks on the video buy bags of dry concrete mix from a local hardware store, lumber yard or big box store.

They pour this dry concrete mix into forms and drag a board across the forms to make the top surface smooth. They make fancy imprints or designs in the dry powder. They then lightly mist the surface of the powder to start the chemical hydration reaction. This reaction causes microscopic crystals to form that act like Velcro. These crystals, when allowed to completely coat each individual piece of sand and stone, are the glue that holds the aggregate in concrete.

After an hour or so, the uninformed video hosts start to flood the top surface with water. It begins to soak into the dry powder just below the surface. My guess is the video hosts never took a geology course. The heavy water grabs onto the ultra-fine cement powder and starts to transport it down into the mix.

Have you ever seen what happens in a rainstorm that falls on dry dusty soil? The heavy rainwater captures the ultra-fine silt and begins to move it down and through the soil. This is why creek water turns muddy just after the storm. Go to the creek hours after the storm and the water is magically clear.

Think about it. How do you know if you’ve added enough water to the concrete mix? How do you know if you added too much? How strong is the concrete just under the surface where most or all of the cement powder has been carried away by the water?

I’m currently working with the Portland Cement Association and its scientists to prove that this method of pouring concrete is perhaps the worst way to do it. Mixing concrete the traditional way, with the proper amount of water, coats the sand and stone with the cement paste. This is the best way to pour concrete, hands down.

Perhaps the worst videos are those I see that tell you how to create thicker wood-framed walls when building a home or room addition. Many pooh-pooh 2x6 walls and urge you to build two separate 2x4 walls separated by an inch or so. These super-insulated walls are supposed to save you big money on your heating bills. Not one of the videos I have watched bothers to do the math for you.

If you follow the advice in these videos without doing the math, you’ll be in for a huge surprise. It’s all about payback. Whenever you spend money on something that claims will lower your utility bills, you must determine how many months or years it will take to claw back in fuel cost savings the extra cost you spent up front on the improvement. Only after you get back all this money do you then start to finally save money.

I decided to do the math on this double-wall method of construction. My imaginary two-story house was 50 feet wide and 26 feet deep. It had standard 8-foot ceilings on both floors.

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