Building a brick hearth in foam board insulated basement.

[JA600L]

Hi guys,
My basement is insulated by owens corning insul pink 1-1/2" foam board.

Is it acceptable to build a brick hearth against this? I am already assuming that there needs to be sufficient clearance around the stove pipe going through the wall.

Will the bricks get too hot for the foam board?

 

[begreen]

If all required clearances for the flue system and stove are safely honored this shouldn't be an issue.

 

[JA600L]

The guys that are going to install my liner said to keep it 12" away from the pipe.

My main concern was if it would melt or not. I would like to follow hearth requirements for my new Ideal Steel which states 6" at the rear. I could get the optional heat shield if needed.

 

[begreen]

There is no problem with exceeding minimums, especially if it gives you better peace of mind with an increased safety margin.

Will this have a single-wall or double-wall connector pipe?

 

[JA600L]

There is no problem with exceeding minimums, especially if it gives you better peace of mind with an increased safety margin.

Will this have a single-wall or double-wall connector pipe?

That is to be determined. Any suggestions?

 

[begreen]

If this were my brother's house, I'd be suggesting double-wall connector. I like to have the flue system optimized for best safety and performance.

 

[BobUrban]

Leave an air gap and there should be no problem - and x2 on DBL wall. Good stuff is lifetime and well worth the extra spent up front in quality and peace of mind IMO

 

[TradEddie]

Hi guys,
My basement is insulated by owens corning insul pink 1-1/2" foam board.

Is it acceptable to build a brick hearth against this? I am already assuming that there needs to be sufficient clearance around the stove pipe going through the wall.

Will the bricks get too hot for the foam board?

Is the foam on the inside or outside of the walls? As far as I can figure out, having exposed foamboard in a basement is against code or many local requirements even without a stove being there. If you can provide any evidence to the contrary, you'll save me a lot of time and effort this fall.

TE

 

[JA600L]

The walls will be covered with a brick hearth and drywall. I just didn't get it all done yet.

 

[TradEddie]

In that case, you should maintain all the required clearances between the foam and any part of the stove, or pipe.

TE

 

[JA600L]

Even with the brick in between?

 

[begreen]

The walls will be covered with a brick hearth and drywall. I just didn't get it all done yet.

The distance should be to the drywall paper as the nearest combustible. You can not go less unless it is specifically allowed in the stove's manual. Note that with a brick veneer it would be much better to use cement board as a backer. In that case it would be the distance to the foam board.

 

[TradEddie]

Even with the brick in between?

Unless the brick construction specifically meets the requirements of a heat shield, mere presence of brick doesn't reduce your legally required clearances.

Take a look at this:
http://www.woodheat.org/clearances.html

TE

 

[begreen]

My understanding is that even if it does meet the requirements it is not permissible for clearance reduction unless explicitly stated so in the stove manual. It's uncertain what Woodstock will allow for the Ideal Steel. In the Progress Hybrid manual they do allow for a reduction with a brick wall of 33%, but this is because the stove has a large 36" rear wall requirement. They allow a 66% reduction for a properly ventilated NFPA 211 wall shield. Clearances for the IS are TBD.

 

[begreen]

The kind folks at Woodstock just sent me the IS manual. Great, quick customer service! Here is the clearance table. Click to enlarge.

 

[JA600L]

So I should invest in the rear heat shield option.

 

[begreen]

Yes. Looks like that is your best solution to get the lowest clearance to combustible.

 

[JA600L]

Would that work with double wall stove pipe?

 

[begreen]

Yes, it should.

 

[JA600L]

I looked at my bill. The rear heat shield comes with it. That must be part of "the works" package.

So if I understand this correctly, I don't even need a hearth. All I would need is half inch drywall, the rear shield, and double wall stove pipe to get my 6" rear clearance.

 

[JA600L]

I used durock cement board with metal studs in the area of the stove pipe and the stove. I feel better about doing that.

 

[begreen]

Call and ask Woodstock. For some reason their manual does not cover double-wall stove pipe. Seems like an oversight, but perhaps they have their reasons.
From the manual:
Clearances can be reduced by attaching an approved heat shield, part #IS-256 and pipe shield, part #W-413.
To further reduce the rear clearance to 6”, you must attach an approved rear heat shield and a 36” pipe shield.