As you know there are many reasons why you feel musty or sewer smell in the house.
House smells after rain roof leak or sewer line.
Sewer smell outside house from leader line or area drains.
After the rain stops and your house smells like sewer gas you simply need to run water through all drains that you have in your house.
There are many causes for a sewer smell but the most likely one is from missing or not well fitted sewer trap plugs.
Namely you should just let water through your shower drain sink drain toilet drain and every other drain that you can find.
When your house smells a bad odor like sewage it s leaking gas.
However rain can cause problems with your home.
Although storm sewer systems should not contain sewer gases sanitary and combined sewer systems do.
A sewer smell outside your house can mean that the city sewer is backed up.
It can be common for a home to smell like a sewer when it rains.
Either it s come completely off or it s become loose.
You will be fine.
A sewer trap is u shaped when water gets into the trap it naturally sits at the bottom of the trap.
But if the smell is constantly present it can have to do with your roof leader line outlets or area drains.
One of the first things homeowners worry about is their roof.
If your toilet is gurgling and your drains are slow in addition to the sewer gas odor you probably have a sewer line leak.
Are all the shingles in place or is there a potential leak around the flashings.
What most homeowners hardly think about is how rain affects the plumbing in their homes.
Find the spot where gas leaks and address that issue.