cement block hearth

[greythorn3]

anyone know the r value of cement blocks, or them pavers home depot sells, i think the pavers are solid and 2" thick, the cement blocks are hollow but really tall..

was thinking of laying these down on the carpet then morter cement board to them then tile over that for my hearth this time,

gotta make a good one since the nc 30 has that high r value for hearth.

 

[weatherguy]

Why dont you cut the carpet and go down to the subfloor?

 

[greythorn3]

i might, its wood under there tho. so it shouldnt matter.

 

[pen]

This wiki on the site should be helpful.

https://www.hearth.com/econtent/index.php/articles/k_values_what_does_it_all_mean

pen

 

[raybonz]

Why dont you cut the carpet and go down to the subfloor?

+1 Cut the carpet..

Ray

 

[DanCorcoran]

i might, its wood under there tho. so it shouldnt matter.

The carpet won't be any good afterward anyway, so you might as well remove it. You want a firm surface, not one that can shift.

 

[greythorn3]

ya i probably will remove it, seems the tall hollow concrete blocks are allot better r value then them solid paving bricks.. so i will probabyl be going with them then cement board over and then tile that. thanks for that chart link!

 

[Creekyphil]

If I'm reading the manual on Englander's site correctly, then a layer of 8 inch block with one sheet of cement board would take you over the R1.5 thats required.

 

[greythorn3]

If I'm reading the manual on Englander's site correctly, then a layer of 8 inch block with one sheet of cement board would take you over the R1.5 thats required.

ya im thinking, layer it like this

cement blocks

concrete board

tiles on top

that would get my nc30 higher up to better view and load, and give me a easy hearth to make that i would be comfortable with the safety

also woudl run cement board to the ceilings in the corner and tile over it also with a 1"+ airspace behind it. for looks and some protection of the sheetrock


thinking about using that pretty slate tile