Introduction
B deck metal panels provide an optimal roof deck solution for low-slope commercial buildings. Also called exposed-fastener or architectural panels, b deck panels feature a ribbed profile. This guide will cover key details about b deck panels.
It will also provide information on proper installation methods. Tips for maintaining b deck panels to maximize their durability are included too. Everything you need to know about using b deck metal panels on low-slope roofs is discussed here.
Overview of B Deck Metal Panels
B deck panels are corrugated metal sheets. They install over roof decking, not directly to roof frames. The panels have trapezoidal or boxed ribs and improves drainage, strength, and looks.
B deck metal panels are a great option for low-slope commercial roofs. These panels feature a ribbed profile that enhances drainage. The ribs also reinforce the coated metal panels against impacts. B deck panels come in different styles and finishes to suit design needs. Read on for a complete guide to using b deck metal panels.
Types of B deck metal panels
Trapezoidal rib panels
The trapezoidal rib profile features evenly spaced angled ribs. The ribs may be uniform in size or vary in width. This versatile rib style provides excellent structural reinforcement to the panels. It is one of the most popular options because it works well for both roofing and wall applications. The angled ribs promote good drainage across the panel.
Box Rib panels
With the box rib style, panels contain U-shaped ribs that are spaced same across the full width. This creates a very uniform architectural look. The box ribs offer increased panel strength compared to some trapezoidal designs. They have a clean, contemporary appearance.
Smooth rib panels
Some b deck panels have flat pan sections rather than embossing between major ribs. This results in a smoother surface texture and appearance. The pan areas are free of any dimpling or grooves. Smooth panels work well when a minimalist, streamlined aesthetic is desired.
Striated rib panels
This style has narrow grooves rolled lengthwise along the flat pan areas between main ribs. It provides a lightly textured effect to the panels. The striated grooves also increase the surface area to improve scuff resistance. This adds durability while maintaining a clean, smooth visual.
Embossed rib panels
Most common is the embossed style with dimpled texture on flat pan segments. The embossing is applied in a stucco-like pattern. It helps reduce glare off the panels and minimizes visible fingerprints. Embossed panels have a lightly textured, matte appearance.
Cost Overview of B deck metal panels
Here is a table comparing estimated costs for the different rib style options:
| Rib Style | Estimated Cost per Square Foot* |
| Trapezoidal | $4.50 – $6.50 |
| Box Rib | $5.00 – $7.00 |
| Smooth | $4.00 – $5.50 |
| Striated | $4.25 – $6.00 |
| Embossed | $3.50 – $5.00 |
*Costs are estimated ranges only and depend on factors like metal thickness. Other factors include coatings, order volume, installation complexity, and regional labor rates.
The trapezoidal and box rib styles carry a slight premium due to the more complex rib shaping. The embossed finish is the most economical since it is widely available. Smooth and striated styles fall in the middle price wise. In general, all styles are within the same overall cost range of $3.50-$7.00 installed.
Composition and Protective Coatings
B deck metal panels consist of steel or aluminum. These metals are coated with baked-on finishes formulated to withstand decades of weather exposure.
- Galvanized Steel – Steel coated with a thin layer of zinc for corrosion resistance. The base material for many architectural panels.
- Galvalume – Steel coated with a proprietary mix of zinc and aluminum for better corrosion resistance than galvanizing alone. Plus excellent heat reflectivity.
- Aluminum – An alternate lightweight base material to steel. Weathers well but higher material cost. Common for coastal or high-humidity environments.
- Fluoropolymers – Durable, abrasion-resistant coatings like Kynar 500 PVDF or Hylar 5000 PVDF chemistry. Resist UV radiation, fading, and chalking.
- Cool Roof Coatings – Special solar reflective paint finishes are available. Help reduce cooling costs in warm climates.
Heavier panel gauges and grades of aluminum provide greater durability and corrosion resistance. Specifiers should weigh the tradeoffs in material costs.
Gauge and Weight B deck Panel Thickness
| Metal | Gauge | Thickness | Weight per sq.ft |
|---|---|---|---|
| Galvanized Steel | 24 to 22 | (0.024”-0.030”) | 10.5 lbs |
| Aluminum | 22 to 16 | (.032” to .090”) | 2.5 lbs |
Applications and uses for B Deck Metal Panels
These panels are well-suited to the following applications:
B deck panels are not recommended for steeply pitched roofs. These roofs may require through-fastening to the roof structure. Always consult the manufacturer’s specifications.
How to install B deck metal panels
Follow the installation key factors to ensure long lifespan of your roof:
Hide Clips
Panels attach to clips pre-affixed to the roof deck or structure without exposed fasteners. Creates clean appearance but clips can be vulnerable to corrosion over time.
Exposed Fasteners
Screws or other mechanical fasteners mounted through the panels into the deck and building frame. Requires sealing fastener penetrations to avoid leaks. Offers strength but interrupts panel appearance.
Attachment
Panels are typically attached to the deck substrate using concealed clips or exposed fasteners like screws. Proper fastener type, size, spacing and torque must be followed.
Sealing
Gaskets, joint sealants and properly hemmed panel edges help prevent water intrusion through side laps and overlaps. Wind-driven rain can enter otherwise.
Thermal Movement
Their ribbed design allows panels to freely expand and contract without buckling or distortions. Space attachments accordingly.
Proper fastener type, size, spacing, torque levels, and sealing are critical to develop full wind uplift ratings and avoid leaks. Thermal cycling requires leaving room for expansion and contraction. Hiring an experienced metal roofing contractor is highly recommended. They understand proper handling and installation methods.
Maintenance and inspection
Regular inspections, maintenance, and small repairs help roofs last longer. These also helps maximize roof system longevity:
- Debris – Remove accumulated leaves, sediment, trash from roof and gutters to prevent clogging drains. Take care not to scratch panels.
- Fasteners – Check for loose or backed out fasteners and redo as necessary per original spacing and torque specs. Rusting fasteners may need replacement.
- Leaks – Inspect flashings, laps, penetrations and cutouts for open seams or cracks needing resealing. Fix sources of leaks promptly before damage spreads.
- Coatings – For steel panels, touch up paint any scratches or exposed edges to maintain corrosion protection.
In general, b deck metal panels are low maintenance compared to most other commercial roof types.
Conclusions
Ribbed b deck metal panels optimize roofing for low-slope commercial roofs. The angled ribbing improves drainage, durability,and looks. Baked coatings guard against corrosion and weathering.
With good specs and installation, b deck panels provide decades of reliable roofing. They deserve consideration for low-slope roofs. Experienced contractors enable b deck panels to deliver long-lasting, cost-effective weather protection.
FAQ’s
What is Type B metal deck?
Type B metal deck is a roof deck panel with a repeating pattern of raised ribs at an angle of less than 90 degrees. The angled ribbing helps accelerate water runoff and provides added strength.
How much does a metal B deck weight?
A metal B deck typically weighs 2-3 psf or 10-15 kg/m2. The gauge, depth of ribs, and coating type can impact overall weight.
What gauge is B deck?
Common gauge thicknesses for B deck panels range from 22 gauge to 16 gauge. A lower gauge number indicates a thicker, more heavy duty panel. 20 gauge is a popular choice.
What are the three types of metal decking?
Type A Deck – Low rib deck with ribs less than 1″ high
Type B Deck – Intermediate rib deck from 1-2″ high
Type F Deck – Deep rib deck with ribs over 2″ high
What is B deck used for?
B deck is commonly used as structural roof decking for low-slope commercial buildings like warehouses, manufacturing plants, retail stores, etc.