How to Measure Your Wood Stove, Gas Fireplace, or Pellet Stove Glass for Replacement

If your fireplace or stove glass is cracked, cloudy, damaged, or broken, replacing it starts with accurate measurements. Whether you own a wood stove, pellet stove, or gas fireplace, measuring the glass correctly helps ensure a proper fit, safe operation, and long-lasting performance.

At Total Hearth, we custom cut replacement ceramic glass for wood stoves, pellet stoves, and fireplaces nationwide. This guide explains exactly how to measure your fireplace glass for replacement and avoid the most common mistakes homeowners make.

Search by Make and Model for Guaranteed Fit

If you know the make and model of your stove or fireplace, the easiest way to order replacement glass is to search directly on the Total Hearth website.

Searching by brand, model number, or appliance type helps ensure you receive the correct replacement glass for your unit. This is the fastest and most accurate option for standard replacement glass sizes.

If your appliance uses a custom piece of glass, or if you no longer have the original glass to trace, follow the measuring instructions below carefully.

Why Accurate Fireplace Glass Measurements Matter

Ordering the correct replacement fireplace glass is critical for proper fit, safe operation, heat resistance, efficiency, airflow, and preventing future damage.

Even a small measuring error can lead to fitment issues or unsafe operation. Taking a few extra minutes to measure carefully can save time, money, and frustration.

Step 1: Let the Stove or Fireplace Cool Completely

Before handling any fireplace or stove components, turn the unit off completely, allow all surfaces to cool, and wear gloves when handling broken glass.

Safety should always come first when replacing fireplace or stove glass.

Step 2: Remove the Existing Glass or Frame

For the most accurate measurements, remove the original glass panel whenever possible.

Carefully remove retainer clips, screws, mounting brackets, and gasket material if necessary. Place the glass on a flat surface before measuring.

If the glass is broken or missing, remove the frame and take what we call the “hard measurements” of the opening. Hard measurements refer to the exact inside dimensions of the opening where the glass sits.

Step 3: Measure Width and Height

Measure the width from left to right and the height from top to bottom.

Always measure the actual glass piece, not the stove door or fireplace opening, unless you are measuring for a custom cut replacement without the original glass.

For best results, measure twice, record measurements to the nearest 1/16 inch, and measure the widest points of the glass.

Example: Width: 12 5/8 inches; Height: 8 3/4 inches.

Step 4: Adjust Measurements for Custom Cut Glass

If you are ordering a custom cut piece and do not have the original glass to trace, remove the frame, measure the exact opening, and subtract 3/16 inch from each side, or 3/8 inch overall.

This adjustment is important because it allows room for the glass tape gasket, provides space for heat expansion, and helps prevent stress cracks or improper fitment.

Failing to leave expansion space can cause the glass to crack during operation.

Step 5: Check for Arched or Custom-Shaped Glass

Not all fireplace glass is rectangular. Many wood stoves and gas fireplaces use arched glass, corner-cut glass, angled edges, or custom patterns.

If your fireplace glass has a unique shape, take clear photos, create a paper template if possible, and include brand and model information. Please contact us directly for assistance via phone or email: (217) 223-0999 or support@total-hearth.com

Total Hearth can help identify and custom cut many specialty fireplace glass shapes. Contact us prior to ordering, as custom-cut glass is non-refundable. 

Step 6: Identify the Correct Type of Fireplace Glass

Different heating appliances require different types of glass.

Wood Stove Glass Replacement

Wood stove glass replacement almost always requires ceramic glass because wood stoves operate at extremely high temperatures.

Ceramic glass handles continuous high heat, resists thermal shock, and is designed specifically for wood-burning appliances. Standard tempered glass should not be used for wood stove glass replacement.

Pellet Stove Glass Replacement

Pellet stove glass replacement also typically requires ceramic glass due to high operating temperatures.

Common signs your pellet stove glass may need replacement include cracks, clouding, chips, or excessive discoloration.

Gas Fireplace Glass Replacement

Gas fireplace glass requirements vary by manufacturer and model. Some gas fireplaces use tempered glass, while others require ceramic glass.

Using the wrong material can create serious safety issues. If you are unsure which type of replacement fireplace glass you need, contact the Total Hearth team for assistance.

Common Fireplace Glass Measuring Mistakes

Measuring the Door Instead of the Glass

Always measure the actual glass panel whenever possible.

Forgetting Expansion Space

Custom cut glass should always allow room for gasket material and heat expansion. This is why subtracting 3/16 inch per side is important when measuring hard openings.

Forgetting Glass Thickness

Thickness matters for fitment and safe operation.

Guessing Measurements

Even small inaccuracies can prevent the glass from fitting properly.

Ordering the Wrong Material

Wood stoves and pellet stoves require high-temperature ceramic glass, not standard tempered glass.

Inspect Gaskets and Hardware During Replacement

When replacing stove or fireplace glass, it is also a good time to inspect glass gaskets, retainer clips, screws, mounting hardware, and door seals.

Worn gaskets and damaged hardware can affect efficiency, airflow, heat retention, and safety.

Important Custom Cut Glass Policy

Because custom cut glass is made specifically to your measurements, custom cut pieces are non-returnable. Measurements must be verified carefully before ordering.

If you have any questions about sizing, fitment, or material selection, contact Total Hearth before purchasing. Our team is happy to help ensure you get the correct replacement glass the first time.

Signs You May Need Replacement Fireplace Glass

You may need new fireplace or stove glass if you notice visible cracks or chips, white haze or clouding, excessive soot buildup, loose fitment, or difficulty seeing flames clearly.

Replacing damaged glass early can help prevent more costly repairs later.

Custom Cut Fireplace Glass from Total Hearth

Total Hearth specializes in custom cut ceramic glass, wood stove glass replacement, pellet stove glass replacement, gas fireplace replacement glass, fireplace and stove replacement parts, hearth accessories, and gasket materials.

Every piece of glass is carefully cut to your measurements for a precise fit.

We proudly provide expert customer service and fast shipping from Quincy, Illinois.

Need Help Measuring Your Fireplace Glass?

If you are unsure how to measure your replacement stove glass or need help identifying the correct material, the Total Hearth team is here to help.

Contact us for assistance with custom glass sizing, fireplace replacement parts, wood stove gaskets, pellet stove maintenance, and gas fireplace glass replacement.

Real people. Real service. Real solutions for every hearth and home.