Perm Rating

The perm rating, or permeance, is a measure of the amount of water that passes through one square foot of material per hour. The lower the perm rating, the more effective the barrier. A facing material with a perm rating of 0.1 or less is considered excellent. Anything with a rating above 1.0 is not considered a vapor barrier.

Building Delivery/Shipment

How long does it take to get my metal building? - It usually takes between 4-8 weeks for your metal building to arrive after the order has been placed. MBD.com will supply you with a estimated delivery date upon order and a guaranteed date after fabrication.

How do I unload my metal building? - In most cases you'll need some heavy equipment (forklift) and a few helpers to get the job done. Everything will arrive at once so be sure to have your location prepped for material. After unloading your metal building be sure to do an inventory of ALL of your items, and let us know immediately if anything is missing. The amount of time to report missing items is limited to 5 days due to job site theft.

What if I’m not ready to put the metal building up when it gets there? - Your materials can be stored. Be sure to look over the information included to properly care for your wall and roof sheets. Please see UNLOADING AND STORING your building for more details.

What will freight cost? - We keep costs as low as possible. Your costs will vary depending on the mileage and the weight of your metal building.

Trim and Gutter

The trim on a steel building serves two essential functions, to close transitions and protect the building from the weather. Trim also adds to the appearance of a building. Our sculptured trim gives the building a refined, quality appearance. Trim covers corner and edge areas of a building. For instance, eave trim creates a transition from the roof to the sidewalls and roof to endwalls.

Most metal building companies often supply "box" or generic trim pieces. This trim routinely has to be modified to fit, as it is created as multi-purpose - and does not fit well on standard panels. We fabricate each profile to match the design of your steel building. We do a lot of work in the shop that will save you headaches in the field. We hem all exposed edges of our trim so it installs easily, fits neatly, and looks great for the life of your building. Our trim is easy to install and adds to the look and the integrity of the building.

Recommended Installation Methods of Insulation

Roof insulation rolls are cut to lengths that will cover the distance from eave to eave, leaving a one-foot overhang on each side of the building.

1) Start at the end of the building and temporarily secure one end of the roll by attaching the insulation to the eave strut with double-faced tape.

2) Pull the insulation across the purlins with the vapor barrier toward the building interior. Double-faced tape attached to the opposite end of the insulation will keep tension on the roof roll while the metal panels are being attached over the insulation.

3) Install the next roll in the same manner, making sure the rolls are stretched tight, aligned properly and closely butted.

4) Fasten tabs using one of the methods described on the following page. Any rips or tears must be covered with matching facing tape to ensure a tight vapor seal.

5) Trim excess insulation flush to prevent it from acting as a wick and moving water into the building.

Surface Air Film Coefficient (F)

The amount of heat flow in BTU's per square foot per hour between an exposed surface of a material and the adjacent air. It is the measure of the conductance of heat through the air film that clings to all surfaces.