Negative Building Pressure and Fireplace Draw

Draft Problemsvent

You don’t wonder if you have a draft problem when you start your fireplace and smoke bellows into your home, you know you have one. When you have a draft problem, the problems may not be just restricted to a problem with your fireplace but may be a negative pressure problem in your home affecting your fireplace and other gas fired appliances. If combustion gasses from these appliances cannot exit the building, they can accumulate in the building and result in serious health problems.

Common Causes

There can be more than one cause for poor draft at a fireplace. Once a chimney sweep has performed an inspection and ruled out other probable causes you may find you have a negative pressure problem in your building. Negative relative pressure between the inside of your home and the outside can have many causes. Causes of negative pressures can be related to poor design of the air conditioning system, damage to the air condition system allowing leaks outside the building envelope, and poor design of ventilation systems such as your kitchen range vent hood. The problem can be local to a room or may be a building wide concern. Detecting the cause for a negative pressure conditions requires inspection, careful consideration, and in some cases special testing using gas detection equipment and low pressure manometers to evaluate.

How Do I Know If I Have A Negative Pressure Problem

Although poor draw at the fireplace may be the first symptom there can be other less apparent indications. In a warm humid climate such as ours, uncontrolled air drawn through the envelope of the building is unconditioned and carries moisture often resulting in mold in strange places such as on the ceiling around air conditioning register grilles, at outlet and switch cover plates on outside walls, or around door and window casings. You may also have a carbon monoxide detector that goes off frequently indicating flue gasses accumulating in the building.

Common Solutions

If you suspect a problem with your fireplace draw, the first thing you should do is contact a chimney sweep. Eliminate other potential causes for poor draft at your fireplace first. If a negative pressure problem is suspected, hire an engineer or air conditioning contractor who can inspect the building and take interior pressure readings to provide guidance in developing a solution. Corrections for negative pressure can include adjustments to air distribution in the building and improvements to ventilation air; however, design considerations should be discussed with an engineer to ensure the solution is proper and will positively affect the comfort of the building.


Edward Robinson, P.E. President of Professional Engineering Inspections, Inc. A Houston based building inspection firm Mr. Robinson has been providing inspection services since 1987.

Does Your Fireplace Need A Facelift?

You may be thinking about replacing your fireplace. Lack of efficiency, outdated style, and safety all play a huge role in a homeowner’s decision to upgrade. Our team of experts are here to help you find the perfect fireplace to suit your life. Learn more about all the options we offer now!

Switching Fuel Types

There are so many fireplace options nowadays. When it comes to traditional fireplace, we hear a lot of concerns about all the time and maintenance required for homeowner. Wood-burning options offer many aesthetically pleasing options. It offers the smell and genuine fire, but they are fairly messy. It’s necessary to haul and store wood, clean out ash, and then you have to build the fire.

Gas options are extremely efficient and convenient. They turn on and off with a button or switch. There is no need for clean-up, and there are no mess! You’ll get more heat output, which is a huge benefit and can cut down on your monthly energy bills. If you want to enjoy your fireplace without putting in all the extra work, consider a gas option fireplace. For busy homeowners, this is the perfect option!

Prefab or Masonry

Whether you’re switching from masonry to prefab, prefab to masonry, or replacing your current prefabricated fireplace, we can help! There are pros and cons to each type, so it depends on your need and lifestyle. Prefabricated fireplaces are easy and quick to install, and they’re not as expensive as a masonry fireplace to built. They are highly efficient, and there are more flexibility for placement options in your home. On the downside, they won’t last as long as a masonry fireplace.

Masonry units are longer lasting and more durable than prefab fireplaces, but they’ll cost more money and time upfront to build them. If you’re ready to invest the time, maintenance, and money, we are happy to help you figure out the best masonry option you’ve been envisioning for your home! It’s well worth it as they offer the beautiful traditional look and feel of a realistic fireplace.

Current Set-Up Out Of Style?

Some homeowners want to switch things up so their fireplace fits better with their modern decor. This means a full remodel or something as simple as getting a new mantel. No matter what you’re considering, our team of professionals are here to help you. Let’s work together to build your dream fireplace today!

Modular Masonry Fireplaces By FireRock

Are you considering a new look for your living space? Then, perhaps a new fireplace is in order! Whether you’re replacing an existing unit or buying your first system, the team at Lords Chimney is here to help you find exactly what you’re looking for. We’ve helped countless homeowners throughout the area turn their visions into a reality, and we can help you out, too! Talk with our CSIA certified crew today!

When picking a fireplace model for a home, choosing the perfect one can be a challenge. One option we offer is a modular masonry fireplace by FireRock. These fireplaces give homeowners that classic look and feel they’re aiming for without the extensive work typically involved in building a masonry fireplace. Learn more below, then give us a call with any questions. We’re here to serve you!

What Is A Modular Masonry Fireplace?

When we discuss modular masonry fireplaces we’re referring to a type of fireplace kit. You will gain the unique look that only masonry designs can offer, but the kit can be put together on-site in a timely and more efficient manner, so that you will be up and running in no time! And when it comes to these types of fireplace kits, trust us when we say that FireRock is the brand you want to rely on!

Flexible Design Options & Efficient Functioning

The great part about these units is the wide range of size and style options you can choose from. Don’t think for a second that you will be limited when it comes to picking out your perfect match! If you have a specific vision in mind, we are certain we can work together to find just what you are looking for. You can easily explore your choices online or feel free to give our team a call to discuss options. We’ll be here for you every step of the way!

Spring Time Is The Right Time For Installation Work

It’s no secret that fireplace usage goes up around the holidays and, with Thanksgiving and Christmas well behind us, many homeowners are cleaning things up and shutting the fireplace down for the next few months. If this sounds like you, then now is the best time to call us in for any work you need done!

Since we get busier throughout fall and winter, we encourage you to schedule your appointment with us today. Installing a modular masonry fireplace takes less time than a traditional masonry fireplace, but we’ll still need a couple days to get the job done. You’ll be able to easily find a time slot that works great with your schedule, and we won’t be taking up valuable time from your burning season since your fireplace is out of use anyway. Once that festive spirit comes back around this fall and winter, you’re fireplace will be primed and ready to set the mood for every occasion!

While we’re at it, let us know of any repair or reconstruction work you need done. We’ll knock it all out, so you’re back to normal in no time. Give us a call now!