Does Fireplace Opening In Block Wall Opening Need Support? - Construction - Contractor Talk

Does Fireplace Opening In Block Wall Opening Need Support?

Thread Tools Search this Thread Display Modes
Old 02-28-2006, 01:27 AM   #1
Registered User
Square-One's Avatar
Trade: general contractor
Join Date: Jan 2006
Posts: 12
Rewards Points: 10

Does Fireplace Opening In Block Wall Opening Need Support?

Hello, everyone! My name is Shane, this will be my first post, and hopefully someone may have a few ideas they can throw at me about this.

Here is the question????

I'm looking to put a 36" fireplace through a 12" block exterior wall, and there is an existing block fireplace pit. From the exterior wall the pit extends out 18" x 5' wide and 5' deep, that was put in when the house was built but has since sat empty. So I need to build a dog house over it. PS this is a gas fireplace! The exterior block wall is 30' long and I will be knocking out block for the opening 7' from one end of the wall. No other load points directly above the fireplace opening. This is a two story home. Once I bust out the block there will be 6 courses of block above the new opening which will be 3' wide by 3' high. Do I need to use and steel plate or I-beam etc. to carry the load above the fireplace opening, or do I take out one more course of brick and put in 2x8 header, or is the opening small enough that I can just box in the framing for the fireplace and be done with it? Should the framing of the fireplace in the block wall be treated lumber? Lastly, when framing would be complete there will be 1/2" gap to each side of the fireplace. Will this void need to insulated or sealed? If so what material should be used? Remember the rear of the fireplace will then be in an enclosed pit, so not sure if the 1/2" void needs to be filled.

A heating and cooling co. will be installing the fireplace, gas line, and B-vent all I'm doing is knocking out the block and framing the opening.

Hope I have full explained the situation, if there is any other information needed please, ask me!

Thank you ALL in advance, Shane!!
Square-One is offline  

Warning: The topics covered on this site include activities in which there exists the potential for serious injury or death. DOES NOT guarantee the accuracy or completeness of any information contained on this site. Always use proper safety precaution and reference reliable outside sources before attempting any construction or remodeling task!




Old 02-28-2006, 01:59 AM   #2
Kevin H's Avatar
Trade: home improvement
Join Date: Feb 2006
Posts: 30
Rewards Points: 25

Re: Does Fireplace Opening In Block Wall Opening Need Support?

I would use steel angles on both side to support the load of the block..just cut the mortar joint with a masonary saw and place the angle in the groove I've done this for door openings in commercial bldgs.- Kevin


Kevin H is offline  

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Glass block shower wall Soul-tez Kitchens & Baths 9 03-27-2011 09:22 AM
Does fireplace opening in block wall opening need support? Square-One Masonry 6 11-22-2008 02:31 AM
Concrete Block Wall skpjose Construction 26 10-20-2008 03:38 AM
6 inch block wall laybrick Masonry 0 01-27-2007 07:29 PM
leaking block wall BuilderDave Construction 8 01-09-2007 11:09 PM

Join Now... It's Fast and FREE!

I am a professional contractor
I am a DIY Homeowner
Drywall Talk is for

At we cater exlusivly to professional contractors who make their living as a contractor. Knowing that many homeowners and DIYers are looking for a community to call home, we've created DIY Chatroom is full of helpful advices and perfect for DIY homeowners.

Redirecing in 10 seconds
No Thanks
terms of service

Already Have an Account?