Announcement
Collapse
No announcement yet.
Options for oven floor insulation and construction
Collapse
X
-
The one-piece granite slab of our oven had the dome cut out. My brother-in-law got a nice round table out of it. Resting the entire oven on top of the granite is possible, I suppose, but seems a bit silly.
-
Originally posted by Pizzarotic View Post
OP said the insulation was going on top the granite.
Originally posted by dogshark58 View PostOption 2.....Would cementing the outer row of bricks to the granite keep it stable or would this inhibit floor expansion....
Leave a comment:
-
Originally posted by MarkJerling View Post
It would be impossible to cement bricks to and underlying layer of smooth granite..
Leave a comment:
-
Originally posted by dogshark58 View PostI am still at the planning stage though I have about 50% of my bricks cut before our Irish wet season started.
I intend covering my hearth with polished granite as an impervious layer on which my underfloor insulation will sit. As the granite comes in 1m square tiles I’ll place weep holes to permit drainage.
I would like some advice regarding insulation under the oven floor. From various pictures I see two options.- The insulation it trimmed to match the shape and size of the oven ie circular.
- The insulation and oven floor are rectangular and much wider than the finished dimensions of the oven.
Option 2, If I use this method do I need to have something around the outer layer of floor bricks to keep the oven floor from moving. Would cementing the outer row of bricks to the granite keep it stable or would this inhibit floor expansion. Do I need to allow for floor expansion?
Any suggestions as always welcome.
Leave a comment:
-
I’m not sure that granite is a suitable material as it does not like heat. Particularly if the granite slab is both under the oven and extends out past the outer rendered shell. The difference in thermal expansion between that part which is being heated and the cooler outer part in ambient temperature is sufficient to crack it. This is exactly the scenario I observed on an oven I was doing repairs on last year. I think I’ve also read the same from members reports on this forum. It would be better to cut the granite so it does not sit under the floor insulation IMO. The concrete slab can be sealed to prevent wicking moisture before placing the insulation board.Last edited by david s; 03-02-2022, 12:37 PM.
Leave a comment:
-
Originally posted by dogshark58 View PostI am still at the planning stage though I have about 50% of my bricks cut before our Irish wet season started.
I intend covering my hearth with polished granite as an impervious layer on which my underfloor insulation will sit. As the granite comes in 1m square tiles I’ll place weep holes to permit drainage.
I would like some advice regarding insulation under the oven floor. From various pictures I see two options.- The insulation it trimmed to match the shape and size of the oven ie circular.
- The insulation and oven floor are rectangular and much wider than the finished dimensions of the oven.
Option 2, If I use this method do I need to have something around the outer layer of floor bricks to keep the oven floor from moving. Would cementing the outer row of bricks to the granite keep it stable or would this inhibit floor expansion. Do I need to allow for floor expansion?
Any suggestions as always welcome.
The floor bricks can either be cut to the inside of the dome bricks or the outside. Cutting to the inside of the dome can be more meticulous whereas to the outside you can be pretty rough as they get covered by the dome insulation.
Leave a comment:
-
What size is your base and what size is your oven?
Wont it be a bit wasteful and expensive laying polished granite under the dome?
I always cut my ceramic board 5” bigger than the dome so the the bricks dont rest right on the edge of the board!
Have you considered laying the granite at the same level as the oven landing, wont your suggested method see the granite around 7” lower than the oven floor surface?
If you put the granite down first then 4” of insulation then 3” of brick .
Leave a comment:
-
Options for oven floor insulation and construction
I am still at the planning stage though I have about 50% of my bricks cut before our Irish wet season started.
I intend covering my hearth with polished granite as an impervious layer on which my underfloor insulation will sit. As the granite comes in 1m square tiles I’ll place weep holes to permit drainage.
I would like some advice regarding insulation under the oven floor. From various pictures I see two options.- The insulation it trimmed to match the shape and size of the oven ie circular.
- The insulation and oven floor are rectangular and much wider than the finished dimensions of the oven.
Option 2, If I use this method do I need to have something around the outer layer of floor bricks to keep the oven floor from moving. Would cementing the outer row of bricks to the granite keep it stable or would this inhibit floor expansion. Do I need to allow for floor expansion?
Any suggestions as always welcome.
Tags: None
Leave a comment: