Top Reasons Why Bakers Everywhere Use FibraMent baking stones:

Pizza on GrillThe FibraMent line of baking stones were developed by Illinios entrepreneur Mark O’Toole to meet the needs of professional bakers. Prior to FibraMent, bakers options were limited to ceramic and clay products that baked unevenly and cracked easily. FibraMent has become an industry standard for the baking industry and now is also available to home bakers seeking to duplicate the joys of hearth baking in their own kitchens.

  • FibraMent bakes great pizza, breads and bagels every time.
  • FibraMent NEVER needs cleaning. Simply brush excess crumbs off the baking stone.
  • Comes with a ten-year warranty.
  • FibraMent customer support is only a mouse click or phone call away.
  • FibraMent is safety tested and certified by NSF International, the widely recognized and respected independent certification organization for public health and safety.
  • Easy to follow baking instructions are provided.
  • FibraMent stones are designed for gas, electric and convection ovens, and also outdoor barbeque grills.
  • Stones available to fit most oven and outdoor grill sizes
  • FibraMent never needs to be removed from your oven.
  • FibraMent is a minimal long term investment which returns optimal results.

FibraMent Q & A

1. What is the composition of FibraMent?

FibraMent is made from a proprietary blend of heat resistant and conductive raw materials approved by NSF International for use in baking ovens.

2. What size FibraMent Baking Stone should I buy?

When measuring your home oven, allow approximately a one inch opening on each side of the stone for proper air movement.

3. Can I lay a sheet of aluminum foil over the FibraMent Baking Stone to keep it from staining?

Yes. The aluminum foil will not alter FibraMent’s baking properties. However, all baking stones are porous and will darken over time. Additional benefits of using aluminum foil are: thermal shock will be minimized and excess moisture will be prevented from contacting the stone.

4. Can FibraMent be used in wood burning ovens and outdoor patio grills?

Although FibraMent has a 1500°F continuous use operating temperature limit, it cannot be exposed directly to flame. The flame diverter that comes with our barbecue grill stones must be used.

5. Some bakery publications have recommend baking on quarry tile. How does FibraMent compare to quarry tile?

Quarry tile does not have the heat transfer properties necessary for quality baking. It is not engineered for baking oven temperature applications. Quarry tile becomes brittle after it has been heated and does not provide an even bake.

6. Can FibraMent be placed directly on a heating element in electric ovens?

No. Nothing should be placed on the element. Setting baking stones or pans on the element restricts the heat flow. This gradually decreases the efficiency of the element until it fails.

7. Do you provide FibraMent similar to the HearthKit’s that are available?

Yes, and you do not have to spend that much money. FibraMent is not only used as a baking stone. Our commercial accounts use FibraMent to line their oven ceiling and walls. For home ovens, place one baking stone on the wire rack at the very bottom of your oven. This will be your baking surface. Use a second FibraMent stone as the ceiling by placing on the wire rack above. Adjust the height of the wire rack so it’s immediately over the foods you are baking. Since we have greatly reduced the ceiling height of the oven, and are redirecting the heat back down on the items we are baking, wall inserts are not necessary. Our tests show using this method improves the bake quality.

8. Do thicker stones improve baking performance?

Thermal conductivity or heat transfer is independent of thickness. Baking stones provide direct bottom heat to your food items. Thickness of the stone does not change the heat transfer rate.

For baking stones to work properly the heat must be conducted evenly.Some baking stones conduct heat too quickly while other stones conduct heat too slowly.

FibraMent’s heat transfer rate is 4.63°F tested to ASTM Standard C177-95.This is the ideal heat transfer rate. Thicker stones (1″, 1 1/2″ and 2″) are primarily used in commercial ovens where additional strength and recovery times are required.

9. Why don’t you supply a wire serving rack with your pizza stone?

Baking stones should be left in the oven. Food bakes at temperatures over 200°F. FibraMent will stay above 200°F for at least thirty minutes after it’s taken out of a 400°F to 500°F oven. You do not want your food to continue to cook after it is taken out of the oven. Also, you will probably burn your fingers trying to take a slice of pizza off the hot stone.

Serving the pizza will also become a problem. You will not harm FibraMent by cutting your pizza directly on the stone but you will dull your cutting instrument very quickly.

10. Can I leave my baking stone in the oven during the cleaning cycle?

Baking stones are porous and absorb anything that comes in contact with it. It’s best to take the stone out of the oven when it goes through the cleaning cycle. You can leave the stone in the oven if you prevent any foreign residue from dripping on the stone.

11. When I baked my last pizza some sauce and cheese spilled onto the stone. How should I clean it?5-year_old_baking _stone

Take a dry rag and wipe off as much of the residue as you can. Use a rubber spatula to remove any stubborn spills. Be careful not to damage the surface of the stone.

You can also bake-off the heavy spills. Instead of turning the oven off when you are through baking, turn it up to the highest temperature setting for 60 to 120 minutes. This will charcoalize the residue spilled onto the stone.

Remember baking stones naturally darken and discolor over time with use (stone pictured here is 5 years old). The grease and toppings that drop on the stone actually improve the baking properties. This seals the surface of the stone and minimizes the chance of dough sticking to the surface.

12. Why is it necessary to predry/temper the stone?

Since baking stones are porous they absorb moisture. Moisture turns to steam at 212°F. If the moisture is forced out of the stone too quickly it can develop cracks. This is why a slow, gradual temperature increase is so important.

Even if we predried the stone at the factory it would pick up moisture during shipment to you. To ensure there was a nominal amount of moisture in the stone the predrying process would have to be repeated.

13. When I opened the carton I noticed some chips on the edges. Should I be concerned?

Due to the inherent nature of the raw materials used in FibraMent, the edges may have some small chips. These areas do not affect the baking properties of FibraMent.

14. Some baking stone suppliers state their material absorbs moisture during the baking process. Is this the case with FibraMent?

Baking stones provide even, direct heat from the bottom of the stone.Consistent thermal conductivity ensures that the toppings and dough finish baking at the same time.

Baking stones do NOT draw moisture out of the dough. Rather, good quality baking stones bake through the dough at a even pace. It’s hard to imagine a stone heated up to 600°F can absorb moisture. Moisture evaporates very quickly at those temperatures.

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Earlier Comments

81 thoughts on “Baking Pizza Stones

  1. I just ordered 2 larges stones , I just cannot find anywhere how much heat the stones can take and if they are suitable for gas ovens. Could you please let me know asap.


    • Hi Camilla,

      They are suitable for both gas and electric ovens and can take as much heat as any home oven can generate for cooking purposes. If you are asking about use in a commercial oven or if they can be left in a home oven while in self cleaning mode where the temps can approach around 900 degrees, let me know and I’ll check with the manufacturer.

  2. Marge

    I forgot to ask you about using the convection oven when making artisan bread on the stone. Would there be an advantage?

    • Hi Marge,

      It’s totally fine to use steam with the stone. You wouldn’t add water to make steam until after the oven and stone are totally preheated so no chance of moisture getting back into it. Ok to use parchment paper too. I don’t think it changes the results noticeably if at all.

      I wouldn’t use the convection mode for bread baking.

  3. Marge

    I just received my stone and am anxious to use it. I’m in the process of pre-drying the stone. I read thru some of the questions and see that it’s okay to put water in a broiler pan on a rack under the stone for the Artisan bread. I was afraid of it cracking.
    Doesn’t this add moisture back in the stone?
    Can I use parchment paper on the stone and have the same results?

  4. ValerieSara

    My sentiments exactly about the FDA. I couldn’t agree more. Now I am going to carefully weigh the valid points you’ve made about the stone and make a (somewhat!) informed decision. I’m leaning towards buying it, although… the King Arthur Flour stone is the highest rated, from what their website says. I believe the KAF stone is identical to William Sonoma’s stone. The WS stone is more than $10.00 cheaper than the KAF stone, oddly enough! Decisions!!!
    Thank you-you’re so sweet to help with this little dilemma!

  5. Good questions and I’m the same way. When you first get the stone you have to go through a one time seasoning process where you basically bake any residual moisture out of it. It stinks during that time, but afterward (and I’ve been using 2 of their stones for a couple years now) there’s no smell and the material is extremely hard and seems very inert. So I personally doubt if there’s anything coming off the stone even if it’s not a material you would ordinarily want to ingest.

    It’s probably less of a comfort that their stones are FDA approved and all that because who trusts the FDA any farther than you can throw them, but the stones are sold widely and use extensively by individuals and countless commercial kitchens and restaurants and I’ve never heard one thing bad about them.

  6. ValerieSara

    Thank you for your prompt answer. Good news about cutting the stone although, from what you’ve said, it sounds like it’s not even necessary!
    The one issue that has come up since I first wrote you is that I’m a little concerned about how safe the stone is. I don’t know what the material is, as the company won’t reveal that info, so of course I can’t make an informed decision. We eat all organic foods and I am particular about what goes in our bodies. Basically, I’m a health freak. Do you have any words of wisdom for me concerning this important factor? Thank you for your help.

  7. Hi ValerieSara,

    The ample side space would more than compensate for the lesser front space so you’d be fine.

    But just so you know, your husband could adjust the size with his eyes closed. For these stones, the manufacturer says to cut them dry and use a diamond bit blade.

  8. ValerieSara

    I have an electric Miele wall oven. The oven RACK is 21 x 15 1/2 inches. The oven interior measures 24 x 19 inches. The rack sits in the oven so that the rack just clears the oven door. In other words, there would only be about 1/2 inch airspace in the front of the oven, but plenty of airspace on the other 3 sides. My question is:Do I need to have the 15 x 20 inch stone cut in order to create 1 inch airspace in the front of the oven? My husband is a tile expert, 30 years in the business. But would the material “take” to being cut? Does it even need to be cut? Thank you.

  9. Karen

    Is the baking stone made out of refactory cement??
    Are the forms used to create the stones sprayed with fuel oil #6 like most others?

  10. Wende

    Is there any other way to get a decent crusty loaf of bread without using a baking stone? I’m having a hard time justifying 45-60 minutes of stone preheat at 500 degrees (living in hot, humid FL and with electricity rates going up and up). I do use my dutch oven and Romertopf but would like to make other shapes. ty

  11. The 18 x 24 stone weighs 27 pounds. You can heat it to whatever temperature you want.

  12. hello my name is jean-claude i have a wholesale bakery in carlsbad california i .am looking for baking stone 24 by 18 inches how heavy they are and how hot should i preheat this stone because i want to use it in a rack oven let me know thank you jean-claude scudellaro 1 760 431 9961

  13. Eric,

    You write…. “My question is why use both the stone and the Romertopf?” Well, the short answer is, I don’t know what I’m doing!
    I’m new at this and I live in an Australian town with cows, horses, and Roos as my neighbors and- not a stop light within 60 miles of here! There’s not much of a “community” of bread bakers in the bush so I have to rely on my reading and interpreting what I read on the internet.
    I thought I was leaving the stone in the bottom of the oven so the oven would maintain an even heat? So, if I understand your question, the stone can be removed and it won’t help or hurt the loaf in the clay baker.

    Is it safe to place my room temperature loaf of unbaked dough on a hot stone if I wanted to try baking just in the oven, no clay baker? I’m concerned that the temperature change could break the stone? I can see how pizza dough, being thin may not “stress” the stone as much as a blog of dough?

    As and far as getting a “decent oven spring” I’m not sure what decent is as the only bread I have to compare it to is my two loaves I’ve baked! The second loaf was better than the first, but as I look at it, it seems to be a fairly spongy, albeit not as “tall” a loaf as I’d like to see. There are an even amount of smallish bubbles throughout the loaf, but I’d like to see some bigger bubbles.
    Would “bakers flour (12.5% protein)” used with the Sourdough no- knead method help at all with producing bigger bubbles or a taller loaf? Right now I’m using organic unbleached white flour.

    My next attempt at bread making will include feeding the starter the night before, and proofing the dough in a warmer place in the house. I’m not sure if I’m headed in the right direction or not….so if you have any comment or suggestion, I’d love hear it. Thanks for being here!

    Northern Rivers Shire, New South Wales, Australia

  14. Okay, I’ve only baked two loaves of sour dough bread so far, so I shouldn’t expect the perfect loaf yet. I have some questions. I have a Fibrament stone on the bottom rack of my oven. I live in Austraila and the ovens here have a top and bottom element that operate together. It is possible to turn on just the bottom element but a fan comes on lowering the temp in the oven.

    I’ve read that it’s okay to place my Romertoff 111 directly on the stone. Is it okay to place the clay bakerl directly on the stone during the pre-heat process so I don’t break the clay? I was confused by a comment saying the Fibrament stone won’t be properly pre- heated if the clay baker is on the stone? The last two loaves I’ve set the baker on the metal rack just above the stone.

    Second question is this. I’ve followed the recipe for sour dough no knead bread from the video. In the video the loaf is baked in a La Cloche round Baker. Is it possible I maybe need to make a slightly larger batch of bread dough to better fit the Romertoff Clay Baker? I ask this because my loaf of bread looks a little “lost” in the Clay Baker.

    I’ve made my own sour dough starter and the two loaves taste wonderful, but they are a little dense and they haven’t developed the size holes I’d like to see.

    If there’s any suggestions for me, I’d appreciate the comments. This is sooo fun!

    • Hi Shep,

      It is ok to place the Romertopf directly on the stone as long as, like you say, they are brought up to temperature together. The Fibrament will be fully preheated if given more time to get there. My question is why use both the stone and the Romertopf? If you’re just baking bread, you don’t gain anything by having the stone in the oven at the same time. It just takes longer to bring it all up to temperature.

      One of the nice things about the shape of a Romertopf is it will accommodate a small loaf too and the shape will be good as long as you’re getting decent oven spring.

  15. bob

    I have been using unglazzes 8×4 in quarry tiles in an al. form for about 5 years, these do not crack when i steam the oven at the beging ogf the baking cycle. Every stone I have used over the years has cracked during steaming. Does this onE suppot steaming the oven?

    • These stones are used widely in steam injected bakery ovens.

  16. Best to stick to pizza and bread for baking directly on the stone.

  17. Mo

    I’m thinking about buying one stone for my LP gas grill, I’ll be cooking everything under the sun on that thing…at least 5 of 7 days, I wonder if cooking my steak/chicken/seafood directly on the stone or on the upper rack of my grill will reduce the life span. I’ll keep it clean.
    I’m concern of the surface build up overtime.

  18. Chuck

    BTW, Gracie, those of us blessed enough to have real, Honest-to-God stone ovens usually heat them to around 900F and then bake things like pizzas, foccacias first and then proceed with the bread baking. That might work on a smaller less-intense scale in your case.

  19. Chuck

    Gracie, I understand your concern about propane. With natural gas prices going up and down (mostly up), I try to plan my backing a little ahead of time. I usually bake several things during the day and that way, the heat “mass” of my oven stays pretty well constant rather than going up and down. I usually make about 6 loves of bread at a time – baking in gangs of two since my oven isn’t the large commercial kind. I give away a lot more than I eat so I usually include something like banana bread or savory biscuits, coffee cake, etc., when I plan my “baking day.” If you’ll read my earlier comment about placing cut tile pieces in the bottom of the oven as well as using the fibrament and villaware stones, you’ll see what I mean about increasing the heat-holding “thermal sink mass” of my oven. This helps with the gas bill as well.

  20. Gracie

    What to do? Just getting started and see the cloche advantages (steam ease) and stone advantage (many shapes). Any advice? Note: I use propane, which is expensive when preheating can take almost an hour, but the versatility of the stone has its allure.

  21. Hi Claude,

    They can be shipped from here but they have to go by UPS and the cost would be high. If you want a quote, use the “Contact” link at the top of the page and tell us which size stone you want and your province and postal code.

  22. Claude

    I am located in Quebec Canada.
    Do you know where I could buy Fibrament stone?

  23. Hi Francine,

    It doesn’t matter which way you put the upper stone in.

    Injecting steam is fine. Most of these stones are sold to commercial bakeries many of which use stream injected ovens. You just don’t want to create steam by spraying water directly on the hot stones.

  24. Francine

    I just purchased two 15″x 20″ Fibrament stone’s for use in an electric oven. I intend to use the lower stone only to cook on. The directions given says to bake on the rough side; smooth side down. My question is this; would I place the stone on the upper shelf rough side down, so that I would be baking my bread or pizza between the two rough stones. Also, can I inject steam into the oven between the Fibrament stone’s using a steamer, or would this harm the stones.

    Thank you for your response,

  25. There are many different styles of gas grills with infrared burners. Some have infrared burners on the side, below and above the grill. The baking stone can not be placed directly on the infrared burner. The key with BBQ grills is keeping the flame from coming in direct contact with the baking stone.

  26. Mike

    I have a gas grill with an infrared burner, is there anything I should do or not do with the Fibrament stone when using it over the infrared burner?

    Thanks in advance,

  27. Water in the skillet is fine and steam won’t hurt the stone any. You just don’t want to toss water directly on the stone.

  28. Audrey Clark

    I like to introduce steam into the oven during the first 5 minutes of baking. I usually throw water on the floor of the oven as we like a very chewy crust. As of late, I have been using a method of placing a cast iron skillet on the lower rack when I turn on the oven, thus allowing it to heat up with the baking stone. Then hot water is poured into the skillet when the bread is placed in the oven to produce the necessary steam. The Fibrament stone dierctions are very specific about not getting water on the stone. My question is will the introduced steam affect the Fibrament stone? BTW, I have an electric oven and have been throwing the water on the floor for a long time with no problems. I know this si nto recommended.

  29. Chuck

    Finally solved the problem of the second stone – I have Fibrament in the top oven and Villaware in bottom oven. Since I wanted to add mass to the oven to further stabilize temperature, I found some 1/2″ slate tiles at Home Depot and when our tile man wasn’t looking, cut them into chunks to fit in under the bottom element in both ovens. Certainly not a pretty thing but they work. I would love to have a stone oven but that’s just on a wish list. My ovens bake pretty well and hold temperature nicely.

  30. Hi Manfred,

    The main advantage of an additional (top) stone is to help minimize a drop in oven temperature when the oven door is opened. Commercial ovens and especially commercial pizza ovens, whose oven doors are opened and closed frequently, get a lot of value from this.

    Since the Fibrament stones are kinda pricey, I suggest going with a Fibrament for the bottom stone where the bread/pizza rests and, if you want to add additional thermal mass to your oven, go with several inexpensive quarry tiles on the top rack. The kind of tiles that I hear are readily available at home improvement stores for a few bucks.

    And now the short answer to your question: no.

  31. Regarding Chuck’s question above, the stones can be cut. The manufacturer recommends cutting them dry with a diamond bit saw blade.

  32. Manfred

    I am interested in buying a stone for bread baking. Will I need 2 stones to create a floor and ceiling? Or will one stone suffice if I am primarily baking bread? I currently use a round La Cloche and really like it, but I want to make other shapes such as batards.


  33. ChuckW, Alaska

    Can the stone be cut to size, perhaps with a tile saw? My oven on the boat (our home) is small.

  34. For both types of ovens, the stone goes on a rack (adjust level as needed and desired), but not on the oven floor.

    You can place bread pans and casserole dishes etc directly on the stone. When you do that, the stone needs to be fully preheated or it will act as a heat insulator, blocking heat from getting to the bottom of the dish until it has reached the desired temperature.

  35. Jo-Ann

    I am very interested in purchasing a baking stone for more crustier breads. I have heard/read great things are your stone and have a coule of questions before purchasing. I have a gas and an electric stove; where do I place the stone? I have read different answers and want to place them correctly. I have read the you the stone on the lowest rack[electric] and on the oven floor[gas]? Also, can I leave the stone in the oven and bake bread[in pans]/casseroles, etc on the stone? Thanks for any advise.

  36. Regarding use of the Cloche for baking chicken, many people do. You wouldn’t gain any additional benefit by having stones in the oven along with a covered La Cloche.

  37. Hi Audrey,

    I bought a HearthKit a long time ago. Now, with the benefit of hindsight, I think they’re largely a marketing gimmick.

    If you are baking casseroles and roasts, as you mention, place the baking dish directly on the bottom stone (this is your baking surface) and adjust the upper rack so the upper stone is as close to the top of the dish as you can reasonably get it.

    The bottom baking stone should be sitting on the bottom rack, not the floor of your oven.

    Let me know if that’s not clear.


  38. Audrey

    To Chuck, has ideas for using your bake stones/bakeware. Also for making your own cloche since you don’t want to buy french, or just buy a Romertopf.

  39. Audrey

    I was also wondering if I can alternatly bake bread and roast a chicken in the La Cloche, or should just purchase the Romertopf for the roast/chicken? If the La Cloche or Romertopf should be used without the baking stone/or stones? Someone posted a suggestion of using baking soda to clean them also.

  40. Audrey

    I have a cheap round pizza stone and was looking at the hearthkitchen one, but am wondering if it is more of a gimmic?! There stone allows air flow thru the back instead, and there is no stone above as in your method. I would think heat transfer from above and below to be better then the way they have it? The question I have is about when they cook cassoroles and roast, with the rack included. If I buy two of the Fibrament retangle stones, would I place the food directly on the bottom stone? or place one stone on the bottom of my gas oven, then the food on a lowest rack, and the second stone on the highest rack?

  41. Chuck

    Thought about the La Cloche and like everything about it except it being French. Nope, just won’t do that. I have a VillaWare Stone in one oven and Fibrament in the other and leave them both in all the time. Seems to stabilize the temperature a bit better. Would like to have another stone in each oven and may do that. The stones aren’t pretty (Betty Crocker style) but they help if you bake a lot.

  42. Thanks for the comments, Barbara (especially considering your right hand being out of commission for a while). It’s always great to get nice feedback. That’s interesting about the same measurements working well at high altitude. I get questions about that and haven’t had anything to say… until now.

    Good luck with your one handed baking efforts.

  43. Barbara


  44. Chuck

    I guess I want my ciabatta to be like those in the pictures – holes as big as bird eggs, crusty and dusted with white flour on the outside and risen to almost the height of a regular loaf. Mine usually taste okay but look like flat recapped tires, brown on the outside with no trace of flour. Perhaps I want too much out of my baking…

  45. I thought Ciabatta was supposed to be more like a dough puddle than a “loaf”. The really big holes come from really wet dough which is going to pancake on you.

  46. Chuck

    Ciabatta – going by recipe, the dough is very, very wet and sticky. If i knead in enough flour to enable forming loaves, the bread is more like a regular loaf. If I follow the recipe and free-form the loaves on a sheet or baking stone, the loaves (during the second rising) flatten out, run together (2 loaves to a sheet) and lose their form. Can’t seem to get the loaves to behave like loaves and less like dough puddles.

  47. Hi Barbara,

    When I’m baking ciabatta and focaccia, I use stones because of the greater surface area of the stones. I’m always baking more than would fit in a cloche. For other types of bread, I use the cloche for the benefits of baking on stones along with the benefit of the cloche lid holding the steam from the baking dough close to the dough. That’s a big benefit.

  48. Barbara

    I’m interested in purchasing the baking stone but have some questions…I have been baking my own version of Italian Herb bread on just plain baking cookie pans. I want to start baking on baking stones as I’ve read that the breads turn out more like artisan breads…crust is crust”ier”..and inside bread is chewy…I want to make ciabatta bread..or simular I want the baking stone or should I get the La Cloche to bake breads? Thank you for any help you can give me in choosing what equipment I should get.

  49. Hi Holly,

    If I’m using it to bake pizzas and preheating it to 500F, I give it at least 45 minutes. I prefer to up to about an hour just to be sure it’s at maximum heat saturation.

  50. Holly

    About how long does it take to preheat the FibraMent baking stone?

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