This is the same new construction as was the previous post. Remember, my beef is professionalism and longevity of work done. Improper materials always cause things to fall apart or otherwise become damaged quicker than they should! And often AFTER the warranty expires!
And as to pre-drywall inspections, which I do a lot of, I said this: I have done enough of these to walk into a house and see where the professionals work and where they don't...
This is your basic shower stall pan. Plastic, framed, plumbed and attached.
While at first glance this might not seem terribly egregious, this pan has been secured with drywall screws. Screwing this pan to the wall studs the proper way to do it. The pan must be screwed. My problem is with the material used - the ubiquitous drywall screw!
Why is this a problem for me?
1. They are 1" long. That is not much security to the stud.
2. Drywall screws are intended for applications where there is no moisture. This area is very moist! And, it gets hot and cold over and over, creating every day condensation. That is moisture inside and out.
3. The pan is the lowest and the hottest area in the shower. It will expand and contract more than anywhere else. That's why you cannot nail it! Drywall screws are not intended for such movement. As they get moist, they will rust. As they rust, they will get weaker and weaker. They can snap!
4. As they rust they will drip pretty rust stains onto various points of the pan. I have seen this during many inspections! But certainly over time this staining will occur.
5. As they rust, they will rot the wood behind.
What is best practice? A screw that does not rust! Stainless steel, or even a deck screw which is made for water applications and is certainly beefier than a thin drywall screw. Also, something 1.5 or 2" is better security.
My recommendation: New construction? Got clients who want one? Raise your antenna and call an experienced home inspector. In my area I would insist on Jay Markanich, but that is just me...
Jay Markanich Real Estate Inspections, LLC
Based in Bristow, serving all of Northern Virginia.
Office (703) 330-6388 Cell (703) 585-7560