Can snow on roof cause bad draft

[Love the Heat]

Had no problem with draft at beginning of the season, everything is clean but I'm now having some back draft issue.
Last year was fine all year but not as much snow as this year.
I probably have between 2-3 feet of snow now on a 9/12 pitch roof and I suspect that in theory it's
like I now have a much higher roof and that is the reason it's causing me the draft problem.

Am i out to lunch or this is probably the root cause of my problem???

Regards

 

[Ashful]

Sounds plausible. @bholler would probably know.

If you had a cat stove, I'd tell you it was time to vacuum it. Does the ECO-65 have any small airways that can clog with fly ash, and which might need to be blown clean?

 

[ABMax24]

Certainly could be the issue, is the chimney cap clear of the snow?

Alternatively it could be the intake vent on your house plugging up, mine has a mesh screen the will occasionally plug with frost or snow.

 

[bholler]

It's certainly possible but I don't find it likely. When was the last time the system was cleaned?

 

[Love the Heat]

Sounds plausible. @bholler would probably know.

If you had a cat stove, I'd tell you it was time to vacuum it. Does the ECO-65 have any small airways that can clog with fly ash, and which might need to be blown clean?

I'll update my profil, no longer a Drolet, the Drolet was a pellet stove that I have now changed to a wood stove(Sedore). Everything is very clean..

 

[Love the Heat]

Certainly could be the issue, is the chimney cap clear of the snow?

Alternatively it could be the intake vent on your house plugging up, mine has a mesh screen the will occasionally plug with frost or snow.

Not clear of the tip of the roof in normal condition(no snow) but definitely worst with the added snow. The intake is fine

 

[Ashful]

It sounds like you must have nailed the cause. Any way to knock the snow down, and prove your theory, at least this once? If confirmed, I guess you have a chimney extension project in your future.

 

[Love the Heat]

It sounds like you must have nailed the cause. Any way to knock the snow down, and prove your theory, at least this once? If confirmed, I guess you have a chimney extension project in your future.

That was the plan for today, clear the roof tip down to the shingles. Got another 10 inches of snow today, so the laneway became the priority.... Darn

 

[begreen]

That was the plan for today, clear the roof tip down to the shingles. Got another 10 inches of snow today, so the laneway became the priority.... Darn

Is there a screen on the chimney cap? If so, check that for plugging.

 

[Love the Heat]

Is there a screen on the chimney cap? If so, check that for plugging.

Nope, no screen and got cleaned-up as well

 

[begreen]

Well, if the snow is this deep, then yes, it could be a problem.

 

[EatenByLimestone]

Could the snow against the foundation be causing fresh air issues? Try cracking a window before pulling down that wonderful insulation.