|
Post by nick2013 on Aug 10, 2013 16:53:57 GMT
Just started today, trying to get an idea of the layout of the oven floor, any tips ?
|
|
|
Post by nick2013 on Aug 10, 2013 16:59:42 GMT
Forgot the photo Attachments:
|
|
|
Post by cannyfradock on Aug 10, 2013 17:18:16 GMT
Hello Nick When you "click to enlarge" your photo, it blows up much to large to view. Perhaps this pic of your oven is better... ..."Just started today, trying to get an idea of the layout of the oven floor, any tips ?" Not quite sure what you mean?.....It looks like you have a fire-brick hearth which looks fine, although your dome looks like it needs a bit of repair...... Terry
|
|
|
Post by nick2013 on Aug 10, 2013 19:25:12 GMT
It's really just a mock up at the moment, the dome comes in 5 pieces, which will be joined with fire clay, there not quite aligned right at the moment. I was wondering if there was enough insulation on the hearth, it's my first build, so just looking for advice on building it to be honest
|
|
|
Post by kstronach on Aug 10, 2013 21:11:11 GMT
Hi nick
Are they thermolight (insulated) blocks the firebricks are sat on atm? I can't quite make it out sorry. If they are the your good to go. If there just ordinary concrete blocks then you need to add some insulation.
Keith
|
|
Tom B
WFO Team Player
Posts: 148
|
Post by Tom B on Aug 10, 2013 21:12:04 GMT
It appears to be an Italiano Forni oven, same as mine. Your floor layout looks ok, but ensure that the bricks are all level. Don't use fire cement to join the pieces of the oven together, as fire cement will start to break up in a short space of time. You're better off using a mix of sand, cement and fireclay, ratio of 3:1:1. That's what I used for mine and its still solid. The oven performs really well. If I was back at the construction stage, I'd block the flue space of the oven with the fireclay grog, and build my flue in my brick arch outside the oven. I believe that will improve heat retention to the maximum.
|
|
|
Post by kstronach on Aug 10, 2013 21:17:49 GMT
Sorry just noticed it looks like you have some calsil board under there? 25mm thick? I haven't used it before so not sure on the insulation values of it regarding how much thickness you would need compared to insulated block or vermicrete. I'm sure terry may know this and have a better answer for you! Personally if I'm right and that is inch board you have there I would be be tempted to add some more insulation, you can never have too much!
|
|
|
Post by nick2013 on Aug 10, 2013 23:37:45 GMT
Thanks for all your comments, the board underneath the firebricks is Calsil, I've levelled the bricks using a spirit level, but I would not say it's completely smooth when I run my hand across the oven floor, but is that achievable ? I was supplied fireclay in the kit I purchased so good to know this will do the job when mixed correctly. I did also wonder about the position of the flue, being at the front of the chamber as opposed to being over the arch, this is something I will bear in mind.
|
|
|
Post by nick2013 on Aug 10, 2013 23:40:41 GMT
Another question ! The archway, should that be made from firebricks as well ? If so, what's the easiest way to tackle it ?
|
|
|
Post by rossioni on Aug 11, 2013 8:55:36 GMT
HiiNick
RE the floor your best to angle the bricks like a herringbone rather than straight on the front.
so if they arent quite level your peel wont catch when its sliding on the oven floor.
also with my floor i ground down any imperfetions on joints so its smooth as a babies bum....only takes 10 mins
|
|
|
Post by cannyfradock on Aug 11, 2013 20:56:45 GMT
Nick It would be better if those blocks under the cal-cil board were the insulation type. Saying that, that cal-cil board is supposed to give excellent heat retention to the fire-brick hearth. Every modular oven supplier seems to have their own recommendations on installing their own ovens...always best to follow their advice. Good tips already given especially on any ridges that are still on the hearth bricks that may catch the pizza peel. I use a 4" angle grinder with a stone grinding disc to grind down any edges, which is probably what Ross uses?. I usually use normal clay bricks for my entrance arch. If you don't put a thermal break between inner and entrance arch then a fire-bricks entrance arch will draw massed heat out of the dome. Arch formers are traditionally made from 2 pieces of plywood with wooden noggins used to space out the form to fit the length of the brick. I (and many others) just used a couple of pieces of polystyrene sheet to make a former. It's a lot easier for you to look back over the Pompeii and Vault oven builds on the forum to get a better idea of method. My Abersychen Pompeii has some pics in it.. ukwoodfiredovenforum.proboards.com/index.cgi?board=pompeiiovens&action=display&thread=1230 .....but it's still wise to look at how others have built theirs. Terry
|
|
|
Post by bookemdanno on Aug 12, 2013 8:16:24 GMT
You can get Thermolites down to 50mm thick at most merchants, if you don't want to raise things up too much. They would help greatly with the insulation, and back up the Calsil.
Herringbone does seem to be "de-rigeur" for the hearth pattern. Use a nice fluffy workable, cakey mix, and a 10mm nothced trowel to lay the firebrick tiles. They'll go down nice and smooth first time!
If you can, try to cut your firebrick tiles do that they do not protrude too far out from your oven external dimensions. That way you don't have a heatsink drawing temp away from where you want it again. Then the outer insulation can run down past this level, encapsuating everything nicely.
|
|
|
Post by nick2013 on Aug 12, 2013 21:02:39 GMT
Thanks for all your advice, I've levelled off the bricks as advised, i mixed the fireclay with sand and water as per the instructions, not sure if i did it right though as I can see lines in it today and where it's thin it's coming away :-(
|
|
|
Post by martin0777 on Sept 26, 2013 17:04:52 GMT
Hi It looks like you used the same kit as I did (Bought from a bloke down in Derby - http://www.handleyclassic.co.uk) I want that impressed with the fireclay solution to be honest.
To insulate base I used a perlite cement mix about 10cm deep - look at my blog / website if that helps.
I imagine you could build a wooden form & pour in the mix.
M
|
|