In a school district, when you install an underground pipe, they will require a type K, in residentials you are only required type L, that means, in laymans term, type K is three times thicker and twice the price of type L.

I started out using cheap paint, as I didn't know any better, and found out why it's cheap (it's a little thicker than water). 

You'll need three or four sheets, so that when stacked they are slightly thicker than the height of the drain pan.Next, draw a circle on each sheet, slightly larger than the diameter of the drain pan, and cut out the circle.

Both houses had been plumbed with type M copper vs. type L which is thicker.

I would build up the posts on the bottom so they are thicker/ look more architectural?

The thicker the filter and the lower the MERV value, the longer it can usually stay in place.

Get thicker skin - if you can't ignore somebody hiding behind a computer, how will you react when confronted with some of the sorts of tenants that are out there?

The thicker the better, but 7 is the minimum I will do.  

I want a thicker tax return.

If anyone was offended by my harsh words, you really need to get thicker skin.