After learning earlier this summer about the radical difference between refractory ceramic blanket ( very hazardous) and non refractory ceramic blanket(Morgan superwool plus) not hazardous!
I purchased 12.5' of non hazardous 1" blanket.
Our friend and fellow rocket scientist Eric Hammond had a horrible experience working with the refractory blanket ! He hated it ! Worse than any fiberglass, he thought a full tyvek suit and respirator should be used.
Today I worked with non refractory blanket ! Sweet ! Easy to cut, like working with a nice thick blanket! Single edge razor blade slid thru like butter. If I had known the exact size I needed to cut it really would have taken five minutes to build my five minute riser.
For those wanting to build an 8" riser . I started out cutting a 31" piece , 10" x 3.14 = 31" for the true I.D. With 1" thick material I first cut back to 29" then 28.5" and finally 28" even. I did have a few spots on the seam where I stuffed a thin trim piece in but only from my less than perfectly straight cuts.
I used a stainless tie wire to make sure my stove pipe stays snapped together.
This riser is now ready to install ! How sweet it is !
"Key health properties
The key health property of all Superwool
® products, including the latest member of the family, is
that any fibres that might be breathed in and reach the lungs are rapidly removed. This characteristic
is referred to as low bio-persistence. As a consequence fibres do not accumulate in the lung,
preventing the occurrence of any significant inflammatory effect that might affect the lungs. Low
bio-persistence is achieved by producing the fibres that are a glassy material, which partially
corrodes and then fragments when it comes into contact with the fluids found in the lungs."
Well that's the catch to this wonderful product... cost was $69.00 for 12.5' plus $59.00 shipping ! Normally they sell 25' roll for $129.00 plus 59.00 shipping. I requested a custom cut. They made it, but I paid full price on shipping.
There are other manufacturers of similar product that are readily available in Europe. Superwool was the easiest to locate here.
I have no regrets about the cost, the ease of use is amazing!
Not all who wander are lost... J.R.R. Tolkien
Location: Wellington, New Zealand
posted 1 month ago
Maybe you should have got the whole roll and acted as a regional supplier for Rocket Mass builders locally!
Nice riser Thomas! I did mine yesterday using material from Morgan. I definitely did not have Eric's experience. I did not use the stainless wire like you did, but I might add it. I've done a few test burns and it has been fantastic. I do think I'm going to pull my top drum and do a visual on it. I'll be posting about that in my build thread.
Not all those who wander are lost - J. R. R. Tolkien
Thank you Caleb!
I am very pleased with the superwool, it was a joy to work with.
If you have access to stainless tie wire (steel tie wire I think would melt) I highly recommend using it. It's cheap insurance that your stove pipe doesn't decide to spring apart mid burn someday down the road...
Looking forward to your next posts on your build.
You should actually be ok with the wire not melting when used outside the riser buy inside the barrel, as the temperature drops a lot as the gasses hit the barrel top. Many people have used chicken wire to wrap around their insulation and it has worked well.
I plan to make a 6" system with the 5 minute riser design, using a 8" duct. I would give myself an extra inch clearance between the riser and barrel in case any ash accumulates on top of the superwool.
Location: Wellington, New Zealand
posted 1 month ago
Matt Walker wraps his ceramic board risers with kitchen tin foil. The Aprovecho people also suggested wrapping tin foil over the insulation of their cores to reduce heat loss by infrared radiation.
I'm glad to hear of the success with the morgan superwool! I wish I had known the difference when doing mine! I would have spent the extra money to get a safer product for sure! Live and learn......I will use the rest of my roll up, and it will function fine I'm sure, but I will be bitter about it for awhile! I learn something new everyday.
I finally rolled out my superwool today and cut off the 58" I will need to replace our studio rmh riser next spring. I have 34" left over that I can use now as needed.
I have found an excellent use for some of that extra morgan blanket and some extra ceramic board as well.
I am building a new brick bell rmh in my shop. I am working with bricks of 3 different sizes... Firebrick is longer and thicker. My old clay brick is from the turn of the century so sizes are variable and then I have brand new clay brick , very uniform in size ...of course its smaller yet than the others...
It has been a real adventure trying to join bricks of different sizes together and filling in the odd spots.
Enter Morgan Superwool ! Mine is 1" thick but easily cut thinner, the perfect thing to raise the level of bricks to where they need to be. Ceramic board is 1" thick and fits tightly anyplace you have a trouble spot!
Using these products in this way is making my build much easier!
I cut 4 small triangles of blanket and stuffed them around the base of my riser to seal it up... no fireclay needed!
Needed a 1" rise over the ash door ... morgan superwool to the rescue!
I am going to use CF blanket under my barrel along with fireclay to help seal it up!
Great stuff I'm enjoying working with it!
I don't believe so Graham. This is the first time I am using it, but they use this in refinery's as insulation .. it better not shrink!
Also all the innovators are using this in many ways , they would have reported if any shrinkage was happening.
LOL Gerry; Any real mason is so busy laughing he won't care about me filling gaps...
This stuff is the real deal for lots of things. I used pieces of the CF board to fill gaps in the bricks. Like the exposed wool, I'll just smear some clay over it and you'll never see it.
So, think I could get Morgan to pay me for this highly informative infomercial ??? You know just Royalty's per viewing ???
Thomas or anyone else have a link to a US seller, that is actually selling Superwool and not Kaowool (also by Morgan, but not the same product)? I'm searching around and not finding pages with it for sale, just the info sheets. I have barrels and some bricks and want to build a test system (no real use when you live in zone 11...) and play with it, and the 5 minute riser is the way to go for me. I figure a roll of 1" thick, 24" wide by 12 feet or longer should be a good amount to start. Thanks!
Hi Mark; I got mine thru Ebay. Seller only listed very short or full roll of superwool plus. I wrote and they gave me a quote on 12.5' shipped to my house. That seller is called True patriot. I am going to try to link to the item, http://www.ebay.com/usr/true_patriot?_trksid=p2060353.m2749.l2754 That listing says it is for 1/2" but my quote was on 1".Cost to me delivered was $129.98
Write to the seller and ask for a quote. I first tried another who responded once and then never again ?? True Patriot responded quickly and although he didn't cut the cost of shipping at all, he did 1/2 the cost from a 25' roll.
i was thinking about using the heat insulation blanket as the liner but using the Kaowool sleeves as the outer rather than the sheet metal, I know the sleeves have an
inner dia of 9 inch with the 1 inch blanket it should reduce to between 7 - 8 inch ID
the idea is to use the blankets to hold the sleeves together and the sleeves to add rigidity to the blanket.