gez
valid member
Posts: 32
|
Post by gez on May 18, 2018 21:08:26 GMT
I’m about to start my oven and I have got hydrated lime , I use a shovel full in the mix when rendering. I have noticed my fire clay is really gritty I didn’t expect it to be ?
|
|
baldywills
valid member
Project finished and enjoying the scran
Posts: 72
|
Post by baldywills on May 19, 2018 5:09:02 GMT
Mine is the same Gez, i was worried as I had left mine in the garage over the winter and thought it may have gone 'off' so ordered a fresh bag and it is exactly the same. Mixes up ok though.
|
|
|
Post by devokewater on May 19, 2018 5:20:02 GMT
OK thanks, I'd better go for hydrated then, to be on the safe side.
|
|
|
Post by devokewater on May 21, 2018 6:11:20 GMT
FWIW I used a sheet of 25mm thick vermiculite board underneath my oven floor (heater blocks) and while it works, more is always better unless we're talking pizza toppings. Yes having a bit of a rethink, as you do, and perhaps the 76mm might be better. I'll redo my spreadsheet containing 2 x pie x radius squared divided by the larger brick surface area to see if it makes much difference. Why didn't they give you nice fun real life examples like this to work with in school! I've gone for heater blocks now for the floor to reduce the cost a little. Did you bed them on any mortar at all.
|
|
|
Post by oblertone on May 21, 2018 12:54:35 GMT
No, mine went straight down on the vermiculite board which provided a level surface to start with.
|
|
|
Post by devokewater on May 23, 2018 6:48:54 GMT
|
|
|
Post by devokewater on May 23, 2018 18:21:51 GMT
Another glorious day. Getting the hang of this IT. Started planning the entrance and archway whilst the mortar was going off
|
|
gez
valid member
Posts: 32
|
Post by gez on May 23, 2018 20:46:11 GMT
I found cutting them with a hammer & bolster much better than the grinder. Looking good so far 👍
|
|
|
Post by devokewater on May 24, 2018 3:39:11 GMT
I found cutting them with a hammer & bolster much better than the grinder. Looking good so far 👍 Thanks gez. All straight cuts into half bricks up to now. Yes I certainly wouldn't waste a cutting blade on any of these. I'll save it for the few fiddly ones coming up soon, eg. dome meeting arch, arch supports, keystones further up. I find cleaning bricks as I go very easy. Looks like another great day coming up. Must make the most of this. Best advice of the day - wear gloves!
|
|
|
Post by devokewater on May 24, 2018 19:58:54 GMT
Today's progress. Four courses now done and inner arch supports in place. Perhaps another one or two tomorrow and the arch. It'll be interesting to see how the diamond blade on my mitre saw fares with the more angular cuts that are now required.
|
|
|
Post by simonh on May 25, 2018 14:42:48 GMT
looking good
|
|
|
Post by devokewater on May 26, 2018 5:14:27 GMT
Another productive day. Got the inner arch done as well but it started to rain so we had our tarp ready. The 4.5 inch diamond blade in my small angle grinder, costing about £7, is great for small cuts. I even took people's advice and got a decent dust respirator (not just a cheap bendy disposable one), and goggles for use when cutting.
|
|
|
Post by devokewater on May 27, 2018 14:43:16 GMT
Hurrah! What a feeling putting those last bricks in! I now have a slight dilemma. I bought 25kg of fire clay and have just enough left for some pointing of the inside of the roof. I haven't built the forward arch and front brickwork yet. How important is it to use homebrew for this. If I have to get more fire clay, does anyone know where I can get a smaller amount than 25kg. On saying that, I am travelling Thursday and Friday so could pop in somewhere if not too far off my journey from Cumbria to Preston, Essex and Sussex.
|
|
|
Post by oblertone on May 27, 2018 17:38:05 GMT
For the flue arch I'd just use what you've got as the temperatures are high, but not as high as the top of your oven; otherwise have a dig in your garden because most of the UK has a clay layer about 10" down.
Oh, and we need pictures or it never happened !
|
|
|
Post by downunderdave on May 27, 2018 19:29:11 GMT
Hurrah! What a feeling putting those last bricks in! I now have a slight dilemma. I bought 25kg of fire clay and have just enough left for some pointing of the inside of the roof. I haven't built the forward arch and front brickwork yet. How important is it to use homebrew for this. If I have to get more fire clay, does anyone know where I can get a smaller amount than 25kg. On saying that, I am travelling Thursday and Friday so could pop in somewhere if not too far off my journey from Cumbria to Preston, Essex and Sussex. Try a local pottery. They should have ball clay and might be willing to sell you one or two kilos,
|
|