House main drain clogged 2 days after new roof.

[Rand]

I am satisfied with the new roof, amish crew did a good job.
2 days later I take a shower and flood the laundry room.
Took some diagnosis as I thought it was a washing machine leak at first.

but my main drain is clogged.. when running water, it comes up from a floor drain under the laundry room wall.
I have had 0 drain issues in 13 years at my house.

What is the chance the roofers lost something or dislodged junk in the vent stack etc to clog drain?

pic of floor drain under wall (furnace condensate drains there)

When that drain backs up it floods the opposite side of wall which is the laundry room.. right beside the dryer..

 

[tbm5690]

Why is your floor drain under a wall!?!

 

[Rand]

Why is your floor drain under a wall!?!

That is the million dollar question.

1951 cape cod house was that way when I purchased house in 2013
the basement was org. unfinished but 25% was later finished into a laundry room with a downstairs bathroom and shower.
the wall goes over the drain.

Which one time I had a plumber adding natural gas line to kitchen (literally 3 foot to get to back side of range from below)
and he kicked the condensate pipe..
which then drained on the rim of the floor drain flooding the laundry room... had to tear out the flooring in there.

AT LEAST I didn't replace the flooring and went with a rubber rug

Why did they seal the knee walls and make the ridge vent useless...

Tons of WHY WHY WHY is the way it is.

pic of sealed knee wall the other side of that wall is upstairs room.
the planks are the roofing planks that the shingles get nailed to.
basically my entire home and attached garage had no working vents.. 0 zippo zilch nada..

 

[GSCJR]

Probably a coincidence @Rand, use a mirror to look inside the floor drain. After many years at my house, toilet paper was accumulating and causing a back up. Once I looked inside the floor drain, it was pretty obvious. Good luck!

 

[dbias]

If the roofers blocked the plumbing vent on the roof it may cause slow or gurgling drains but I can’t see how anything they could possibly do to cause the main to clog and back up into the house. I bet the main probably has tree roots in it and they have begun growing and in spring and have exposed a long building problem.

 

[Rand]

If the roofers blocked the plumbing vent on the roof it may cause slow or gurgling drains but I can’t see how anything they could possibly do to cause the main to clog and back up into the house. I bet the main probably has tree roots in it and they have begun growing and in spring and have exposed a long building problem.

So plumber was here I coughed up double for emergency service.
Cheaper than calling off tomorrow.
no trees. Closest is 10 ft lower and 100ft away on opposite side of house.

The new theory is they dislodged some debris and it clogged up.. but I'm ok with paying for that.

My stack is 75 year old cast iron.. gonna have some rust and crust. rust so thick it looked like potting soil in the one cleanout.

13 years was a good run.

 

[Lubener]

Plumber was there so what caused the backup?

I doubt the roofers had anything to do with your sewer line. Hopefully your plumbing service ran a camera in the main and identify the problem. Most likely a clay tile colapsed . If rust has accumulated in the cast iron stack, it isn't going to come loose on its own. It would take a power snake to break it up.

 

[Paco Pena]

This could be like the mechanic situation where the customer says you rotated my tires last month now my radio does not work.

Paco