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Yes! You should use a mortar designed for high heat. Normal mortar tends to try out and crumble. Your local building supply should be able to help you out with the right mixture. (Many high heat furnaces use no mortar at all, stacking the bricks.)

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Q: Do i need to use a special mortar in a fireplace?
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What is the Effect of heating on concrete structure?

All depends on How Much heat your talking about. General rule: if it is more than a concrete will experience from the sun, special concretes and additives should be employed. There are specialized products such as Fire Brick for use in a fireplace. Any mortar, grout or cementitious products used in a fireplace should also be able to stand excess or out of the ordinary heat temperatures. Common problem to a Type 1 concrete that has been exposed to fire is it becomes what is called "Friable". Lost strength! Heat a normal concrete fast enough and it will explode when the moisture inside expands!


How much does it cost to convert a wood burning fireplace to a gas fireplace?

It is not as bad as you think, the most difficult part is deciding whether to keep it as a gas fireplace or a wood burning fireplace with a gas lighter; so you can have both. Decide the gas to be used, Natural gas or LP (pretty much determined by what is already available) The fireplace itself needs little modification except the gas supply and available electrical circuit (depending what type/style gas fireplace you want.) If you decide on gas with artificial logs, then running black pipe to copper lines is all you need. If you are going to burn gas and use wood then run black pipe throughout (remember to use a cement product, for high heat, to seal any new whole in the fireplace.) Note: Either way you decide thoroughly clean the chimney and fireplace and inspect the doors, damper, flue, and look for cracks in the fireplace. I mention this because it is probably the last time you will need to do that. I have converted fireplaces in both ways; gas to wood burner and wood burner to gas. The insert is the biggest expense you will have, you can easily spend $600 on just those parts; not installed. And please don't forget to install and easily accessible gas shutoff valve.


Can you partially close fireplace flue when a fire is burning in fireplace?

You have to, or the fire is going to burn way too hot and not last very long. Depends on the type of wood you use also.


What is the ratio of mortar lime and sand in masonry mortar mix?

it is typically 5 parts lime, 3 parts sand, 1 part cement, but varies depending on use and situation


Can wood be used in a gas equipped fireplace?

Depends- some as "gas assist"- a woodburning fireplace with gas jets- you can use either. Some are gas only- never meant to burn wood. Which do you have?

Related questions

When do you need to use the bag of Mortar in Red Dragon Island?

there isn't a special time you need it, you just use it to fix the pridge.


Do the fire brick need mortar in-between or do they butt un against each other?

As a rule you should use mortar. There is a special mortar that is used made for high heat. Use just enough for the bricks to bond. In UK its called fire cement.


What fireplace accessories are needed?

Some accessories you need with a fireplace include fireplace tools and a broom for sweeping. Make sure you have it cleaned out before you use it.


Do you have to use mortar to repair stone wall?

yes we need to


When do ashes need to be cleaned out of a fireplace?

Every so often you use it.


Where do you use the mortar on red dragon island?

you use the mortar at the great bridge to fix it


What do you use in front of a fireplace to keep sparks from the floor or rug?

place a hearth stone and use a fireplace screen


Can type s mortar be used without sand?

You can use it to make stucco, lay brick and block, or bed-in fiberglass tubs and shower stalls.


Just Purchased Antique Glass Doors for Fireplace?

If these antique glass doors were not designed for fireplace use then soot and smoke could damage the glass. I would remove them or place another fireplace glass barrier between the fire and the antique doors. If they were designed for use in a fireplace then they should stand up to the soot and smoke from your fire and I would make sure to clean them frequently to avoid build up.


What can I use to keep my fireplace clean?

You can use a fireplace cleaning kit to remove some soot from the base of your chimney.


How much can a classical flame electrical fireplace cost?

A ClassicFlame Electric Fireplace can cost around $600. You can buy some models from Amazon. Use discounts and special offers to locate even better offers. Most electrical fireplaces comes with many nice functions such as electronic timers and special brightness settings.


Is it a good idea to place pictures over a stone fireplace Doesn't it warp the pictures when you use the fireplace?

If you have a properly installed chimney, with correct insullation, you don't need to worry about items that you place on the mantle.