Can you close a fireplace opening?

Yes, you can close a fireplace opening. There are a few options for closing up an unused fireplace, depending on your goals. Some common reasons to close a fireplace opening include reducing drafts, removing the fire hazard, and changing the look of the room. The main methods are to install a fireplace plug, convert to gas logs, or build a fireplace wall in front of the opening. Each has pros and cons to consider.

Should you close up an unused fireplace?

There are good reasons why you may want to close up an unused fireplace. Here are some of the top considerations:

• Eliminate drafts – An open fireplace flue is essentially a hole in your home that allows air to flow in and out. This can create uncomfortable drafts in the room. Closing it up helps insulate that part of the house.
• Remove fire hazard – An open fireplace, even one that appears unused, can be dangerous for kids or pets. Removing access ensures safety.
• Save energy – Keeping the flue open allows warm air to escape and cold air to enter through the chimney. Closing it up conserves energy.
• Create storage space – You can use the fireplace niche for storing wood, displaying decorations, or even installing shelving.
• Change the room layout – Covering the fireplace gives you more flexibility in how you arrange the furniture in that room.
• Reduce cleaning needs – No more ash, soot or debris to sweep up if you close the fireplace.
• Improve home value – Removing outdated or unusable fireplaces can add value by giving more living space.

However, there are also reasons you may want to keep it open. An operating wood-burning fireplace can provide heat and ambiance on cold days. A gas fireplace insert offers convenience and efficiency. And some buyers may expect to see a fireplace when house shopping.

Option 1: Install a fireplace plug

One easy way to close up a fireplace is by installing a fireplace plug, also called a fireplace damper or chimney balloon. This inflatable seal is inserted into the fireplace throat and then inflated to completely block the opening. Here’s how it works:

• Measure the fireplace opening to get the right size plug, available in standard sizes.
• Sweep out any ash before inserting the uninflated plug.
• Use the included air nozzle to inflate the plug until it fits snugly.
• The plug has a pressure gauge and valve to maintain inflation.
• Once positioned, inflate fully to create an airtight seal.

Fireplace plug benefits:

• Inexpensive option ranging $50-$150.
• Easy to install yourself in about 15 minutes.
• Reversible – the plug can be removed whenever you want to use the fireplace again.
• Effective for eliminating drafts when fully inflated.

Potential drawbacks:

• Can deflate over time and need re-inflating.
• Some find the appearance unsightly if the plug is visible.
• Does not fully prevent smells or ashes coming through the flue.
• Not as durable or permanent a solution as other options.

Overall, a fireplace plug is a quick and affordable way to close up an unused fireplace for the short term. It’s easy to test out before committing to a permanent change.

Option 2: Install gas fireplace logs

Converting your traditional wood-burning fireplace to gas logs is one way to make use of the existing space while fixing some of the drawbacks of an open hearth. Gas fireplace inserts burn propane or natural gas for fire without the need to stock wood. Here’s how it works:

• A natural gas line is connected to the fireplace by a technician.
• Decorative ceramic fiber logs are positioned on a grate inside the fireplace.
• The gas burner is lit manually or by thermostat like a furnace.
• Glowing embers diffuse by blowers for effect.
• Glass doors enclose the flame for efficiency and safety.

Benefits of gas fireplace logs:

• Provides heat comparable to wood fire at 70% efficiency.
• Adjustable thermostatic control for easy on/off.
• Operate for pennies per hour, saving wood cost.
• Closed combustion design means no ash or smoke smell.
• Instant ambiance at the push of a button.
• Safer than wood with glass screen.

Potential cons to consider:

• Higher upfront cost at $3,000-$5,000 installed.
• Need access to natural gas line and electricity.
• Heat output not as strong as a wood fire.
• Some maintenance required annually.

For a fireplace you want to use regularly without the hassle of wood, a natural gas insert could be an excellent solution.

Option 3: Build a fireplace wall

If you want to entirely remove the fireplace feature and use the space for something else, building a wall across the front is an option. This involves constructing a new stud wall in front of the fireplace opening.

Steps for building a fireplace wall:

1. Shut off and cap the gas line if gas logs were present.
2. Have the chimney flue sealed up with a chimney cap.
3. Frame vertical studs in front of the fireplace opening.
4. Attach horizontal supports across the studs.
5. Install fire-rated drywall over the framework.
6. Mud, tape, prime and paint the wall to match.
7. Finish by overlaying with stone, shiplap or preferred architectural feature.

Advantages of a fireplace wall:

• Creates a seamless built-in look as if never there.
• Opens up floorplan options without fireplace constraints.
• Provides back wall space for furniture placement.
• Drywall over brick finishes smoother and is easier to decorate.

Possible disadvantages:

• More expensive due to labor and materials.
• Existing fireplace mass remains inside the wall.
• Can’t easily revert back later.

Building out a wall requires expertise but offers a permanent fireplace removal solution.

Which option is best for closing a fireplace?

Determining the best option depends on your specific needs and goals:

Method	Cost	Installation Work	Appearance	Heating Ability	Permanence
Fireplace Plug	Low	None	Unsightly if visible	Sealed off completely	Temporary
Gas Logs	High	Professional	Attractive flame	Decent heat	Semi-permanent
Fireplace Wall	High	Professional	Seamlessly integrated	No heat	Permanent

Budget

If budget is a main concern, a fireplace plug kit offers an affordable short-term solution under $150. Building a complete wall costs considerably more.

Usage

If you will use the fireplace occasionally, converting to gas logs allows heat and ambiance on demand. Sealing it off makes sense if you plan to never use it again.

Aesthetics

For a seamless look integrated with room decor, a fireplace wall fits the space to your style. A visible plug mars the appearance.

Effectiveness

For completely eliminating drafts and creating an airtight seal, a plug works best when fully inflated. Walling off is also highly effective.

Commitment

If uncertain about permanent closure, a fireplace plug can be removed any time. A new wall involves demolishing if you later change your mind.

Overall, assess your particular situation and needs to decide which approach is the right solution for closing up your fireplace. An experienced contractor can also provide guidance on customizing the project to your fireplace type and home.

Steps for installing a fireplace plug

Here is a summary of the key steps if you choose to install a fireplace plug:

1. Measure the height and width of the fireplace opening.
2. Order an inflatable fireplace plug 2-3 inches larger than your opening.
3. Remove any ash, debris or grates inside the fireplace.
4. Insert the deflated fireplace plug into the opening.
5. Attach the air hose and inflate until it seals the space.
6. Monitor the pressure gauge and refill as needed.
7. Check for air leaks and reposition or reinflate if needed.
8. Optional: Install fireboard behind the plug for insulation.

Safety tips for installing a fireplace plug:

• Wear protective eyewear and respirator when cleaning ash.
• Carefully handle old dampers as they may contain asbestos.
• Use a fireplace brush and shovel to sweep out ash before insertion.
• Work slowly when inflating to get a tight seal without popping the plug.
• Make sure the plug is secure before leaving unattended.
• Keep air nozzle away from face when inflating to avoid dust.

With simple tools and safety precautions, inserting a fireplace plug is a project a homeowner can complete in one afternoon. Take your time to position and inflate the plug properly for best results.

Conclusion

Whether you want to stop drafts, prevent fire danger, or change the look of a room, closing up an unused fireplace is a smart option to consider. Installing a plug, converting to gas, or building a wall are good solutions depending on your specific needs and situation. Evaluate the benefits and drawbacks carefully before deciding on the best method for your home and budget. With the right approach, you can transform that outdated fireplace into a better functioning part of your modern living space.