Sometimes steel reinforcement bars are added to the inside of the logs to increase their strength and to prevent them from bending or cracking under extreme heat.
Ceramic vs fiber logs.
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Once the logs are dry they are colored with a special heat resistant paint.
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Cement vs ceramic gas logs.
Concrete logs are made of light weight reinforced fiber cement siding which is a type of concrete.
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With three sizes to choose from these 7 piece ceramic fiber log sets provide radiant heat and an attractive focal point.
There is also a newer version called glass fiber reinforced concrete.
This mixture is poured into a rubber mold and then left to dry for a day or so.
Refractory ceramic has a greater heat radiating capability and will last for many years.
You can also use them in outdoor fire pits that are designed.
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Vented gas logs also have the option to burn brightly with little heat which means you can enjoy the appearance of a fire on a summer evening without heating the house.
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These dual rated berkley oak gas log sets can be installed in a vented or vent free setting.
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But they do break down with age and they don t look quite as realistic.
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Most gas logs are made of a ceramic or refractory cement mixture that has been designed to withstand high temperatures.
It is fire and rot resistant and needs to be resealed every one to three years.
All vent free gas log sets come complete with a gas valve but you may have a choice on either a manual safety pilot gas valve or a millivolt gas.
Ceramic fiber logs are better at resisting flame damage and some glow when heated.
Refractory ceramic is a mixture of powdered ceramic and cement.
The ceramic fiber logs will glow after about 15 minutes of use giving a more realistic burn where the concrete refractory logs will not glow at all but are more durable and intricate in their detail.