Specifications
Glass Thickness: What You Need for Each Application
Glass thickness is the single most important specification for a table top. Too thin and the glass will flex or break under normal use; too thick and you add unnecessary weight and cost. The correct thickness depends on two factors: how the glass is supported, and how large the unsupported span is.
1/4 inch (6mm)
Approximately 3.3 lbs per square footApplications: Protective covers placed on existing solid surfaces -- wood dining tables, desks, dressers, nightstands. The underlying furniture provides all structural support; the glass simply protects the finish.
The most common and affordable option. Sufficient when the glass rests on a flat, solid surface with full support underneath.
3/8 inch (10mm)
Approximately 4.9 lbs per square footApplications: Glass tops on bases with partial support -- pedestal tables, metal frames, trestle bases. Patio table replacements. Smaller coffee tables and end tables where the glass is the primary surface.
A good middle ground between strength and weight. Appropriate for most furniture applications where the base provides edge or center support.
1/2 inch (12mm)
Approximately 6.5 lbs per square footApplications: Freestanding glass dining tables, large desk surfaces, conference table tops with open-span support. Glass supported only at two ends or on a single pedestal base.
Required when the glass must span more than 24 inches without center support. Provides the structural rigidity needed for daily use as a work or dining surface.
3/4 inch (19mm)
Approximately 9.8 lbs per square footApplications: Large-format glass tables (over 48 inches in any dimension), commercial reception desks, glass shelving with heavy loads, and premium furniture where the thickness itself is a design feature.
The thickest standard option. Used when the glass spans long distances or supports significant weight. The 3/4-inch edge profile creates a substantial, high-end visual presence.
Edge Options
Edge Profiles: Flat, Beveled, Pencil & Ogee
The edge profile affects both the appearance and the feel of a glass table top. All exposed edges are finished to remove sharpness, but the specific profile you choose determines the visual character. Here are the four standard options.
Flat Polished
A straight, 90-degree edge that is ground smooth and polished to a glossy finish. The most common and versatile option.
Best for: Modern, Contemporary, Transitional furniture
Beveled
An angled cut (typically 1 inch wide at a 45-degree angle) along the top edge that creates a decorative slope.
Best for: Traditional, Colonial, Formal dining tables
Pencil Polished
A slightly rounded edge profile -- named for its resemblance to the curve of a pencil. Comfortable to the touch, with no sharp corners or hard angles.
Best for: Dining tables, desks, any surface where arms rest on the edge
Ogee
An S-shaped curve profile that creates an elegant, sculpted edge. The ogee profile is the most decorative standard edge option, adding substantial visual.
Best for: Formal dining tables, executive desks, high-end traditional furniture
Edge Profile and Safety
All edge profiles are available on tempered glass. For homes with children, pencil polished edges are recommended for their rounded, finger-friendly profile. Flat polished edges, while smooth, present sharper 90-degree corners. Beveled and ogee edges also provide comfortable, non-sharp top edges due to their angled or curved profiles.
Glass Type
Tempered vs. Annealed Glass for Furniture
The choice between tempered and annealed glass is a safety decision, not just a quality one. Building codes in Virginia, Maryland, and DC require tempered safety glass in certain furniture applications, and we recommend it for all table tops as standard practice.
Tempered Glass
- 4x stronger than annealed glass of the same thickness
- Breaks into small, granular pieces (not dangerous shards)
- Resists thermal shock from hot dishes and cold drinks
- Cannot be cut or drilled after tempering
Annealed Glass
- --Standard, non-heat-treated glass
- --Breaks into large, sharp shards (significant injury risk)
- --Can be cut and drilled after manufacturing
- --Acceptable only for protective covers on solid surfaces
Our recommendation: Use tempered glass for all table top applications. The safety benefits far outweigh the small additional cost, and tempered glass is required by code for any glass table where the glass functions as the structural surface. We provide tempered glass as standard for all glass table top orders.
Custom Work
Custom Shapes, Sizes & Special Features
Glass table tops are not limited to standard rectangles and circles. Custom glass cutting allows for virtually any shape, including matching the exact contour of an irregular table base, cutting notches for fit around obstacles, drilling holes for cables or umbrella poles, and creating free-form organic shapes from templates.
Rectangle with rounded corners
The most popular custom shape -- standard rectangle with corners rounded to a specified radius (typically 1/2 inch to 2 inches). Eliminates sharp corners for safety and creates a softer visual profile.
Circle or oval
Requires precise diameter or axis measurements. For oval shapes, provide both the length and width. Circles and ovals can have any edge profile.
Free-form / organic
Cut from a paper or cardboard template that traces the exact shape of your furniture base. Common for mid-century modern tables with irregular bases.
With cutouts or holes
Holes for umbrella poles, cable management, or decorative patterns. All holes and cutouts must be specified before tempering. Minimum hole diameter varies by glass thickness.
Matched to existing glass
We can template from a broken or damaged glass top and cut a replacement to match the original dimensions and shape exactly.
Protection
Using Glass to Protect Wood Furniture
One of the most practical uses for glass table tops is protecting valuable wood furniture surfaces. A glass cover preserves the original wood finish from scratches, water rings, heat marks, ink stains, and daily wear while allowing the wood grain, color, and character to remain fully visible.
This is particularly valuable for antique furniture, heirloom pieces, and high-end wood tables where refinishing is expensive or would diminish the piece's value. Many homeowners in Georgetown, McLean, Chevy Chase, and throughout the DMV use glass covers on dining tables, writing desks, and dressers that see daily use.
Best Practices for Glass Over Wood
Use clear rubber or silicone bumpers between the glass and wood to allow air circulation and prevent moisture trapping
Choose 1/4-inch tempered glass for most protective applications -- thick enough to be durable, thin enough to keep the visual focus on the wood beneath
Flat polished edges provide the cleanest, most invisible profile for protective covers
Cut the glass to match the exact dimensions of the table surface, or slightly smaller (1/4 inch on each side) for a recessed look
Clean the wood surface thoroughly before placing the glass -- any debris trapped underneath will be visible and may scratch the finish over time
Common Questions
Frequently Asked Questions About Glass Table Tops
How thick should a glass table top be?
Thickness depends on the table type and glass span. For protective covers on existing tables, 1/4 inch (6mm) is standard. For glass placed on a pedestal or base with full edge support, 3/8 inch (10mm) is recommended. For freestanding glass table tops spanning open space (such as a glass desk or dining table supported only at the ends), 1/2 inch (12mm) or 3/4 inch (19mm) is necessary. The longer the unsupported span, the thicker the glass should be. Expert Glass Repair provides specific thickness recommendations based on your table dimensions during a free consultation.
Should I use tempered or annealed glass for a table top?
Tempered glass is recommended for most table top applications. It is approximately four times stronger than annealed glass of the same thickness and, when broken, shatters into small granular pieces rather than dangerous shards. Tempered glass is required by code for any table where the glass surface is the structural top (dining tables, coffee tables, desk surfaces). Annealed glass is acceptable only for protective covers placed on existing solid surfaces where the glass is not structural. Note that tempered glass cannot be cut or drilled after tempering -- all sizing and hole placement must be finalized before the tempering process.
What is the best edge type for a glass table top?
The best edge depends on the application and aesthetic. Flat polished edges are the most versatile and affordable, providing a clean, modern look suitable for any style. Beveled edges (typically 1-inch bevel) add a decorative angled cut that catches light and complements traditional furniture. Pencil edges have a slightly rounded profile that is comfortable to the touch, making them ideal for dining tables and desks. Ogee edges feature an S-curve profile that provides an elegant, formal appearance best suited to traditional and transitional furniture styles.
Can glass table tops be made in custom shapes?
Yes, glass table tops can be cut to virtually any shape -- circles, ovals, rectangles with rounded corners, free-form organic shapes, and precise templates matching existing furniture. For irregular shapes, we create a cardboard or paper template of the exact outline and cut the glass to match. Custom shapes are available in all thickness and edge options. Expert Glass Repair has cut custom glass shapes for furniture, display cases, and architectural applications throughout the DC, Virginia, and Maryland area since 2004.
Will a glass table top protect my wood furniture?
Yes, a glass cover protects wood surfaces from scratches, water rings, heat marks, and daily wear. A 1/4-inch tempered glass top placed over a wood dining table, desk, or dresser preserves the original finish while allowing the wood grain and color to show through. Small clear rubber bumpers (provided with the glass) are placed between the glass and wood to allow air circulation and prevent moisture trapping. This is one of the most popular services we provide to DMV homeowners with antique or high-value wood furniture.
How do you measure for a glass table top?
For rectangular and square tops, measure the length and width at multiple points to verify the surface is uniform (older furniture may not be perfectly square). For round tops, measure the diameter at several angles. For oval or irregular shapes, we recommend creating a paper template by tracing the exact outline. All measurements should be taken to the nearest 1/16 inch. Expert Glass Repair provides free on-site measurement for custom glass table tops throughout DC, Northern Virginia, and Maryland -- we verify dimensions, assess the base, and recommend the appropriate thickness and edge treatment.
How do you clean and maintain a glass table top?
Clean glass table tops with a soft cloth and standard glass cleaner, or a mixture of white vinegar and water. Avoid abrasive cleaners, scouring pads, or harsh chemicals that can scratch the surface. Wipe up spills promptly to prevent water spots. For tempered glass, minor surface scratches can sometimes be buffed out with cerium oxide polishing compound, though deep scratches cannot be repaired without replacing the glass. With proper care, a tempered glass table top will maintain its clarity and appearance indefinitely.
By the Expert Glass Repair Team
Serving the DMV since 2004 -- DC, Northern Virginia & Maryland
Expert Glass Repair has custom-cut thousands of glass table tops for homes, offices, and restaurants across Washington DC, Northern Virginia, and Maryland. We provide free measurement, edge profile samples, and delivery throughout the DMV. Fully Insured.
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Need a Custom Glass Table Top?
We provide free on-site measurement, bring edge profile samples to your home, and deliver custom-cut tempered glass table tops throughout DC, Northern Virginia, and Maryland. Contact us for a free estimate.