Calculated Thermal Values

Basically it is the reciprocal of the calculated U-Value. By definition it is the summation of all the R-Values for each of the building's components. This method of calculation does not consider the thermal short circuit effect of structural members, fastener population or the compression of the insulation at its structural members. It should also be noted that this type of calculation often indicates heat loss values for building envelopes that are lower than those actually found in the finished structure.

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.

Framed Opening Cover Trim

Full cover trim. Provides head and jamb cover trim and sill trim if applicable, so that no red iron is visible at the opening.

Facings as Vapor Barriers

The main function of facings is to act as a vapor barrier. While a vapor barrier may not necessarily be able to stop the flow of water vapor, it does an excellent job of minimizing the rate and volume of the flow. This prevents moisture from accumulating within the insulation blanket and the structure, which translates into consistent thermal values and lower heating and cooling costs.

Facings intended to serve as vapor barriers should be installed on the inner, heated surface of the insulation, where vapor pressure is the highest. This helps in preventing vapor from reaching the cooler air and condensing.

VAPOR BARRIERS PREVENT VAPOR FROM REACHING COOLER AIR AND CONDENSING.

Steel Building Packages

Steel building kits are shipped with all the required hardware to construct a solid structure. Forget about running around town looking for bolts or brackets with steel building packages. When investigating steel building packages, request information about the different options that are available from each steel building manufacturer. Panel material or galvalume colors can complement any building and help to exceed your expectations. You can begin with more standard steel building packages and adjust them suit your specific needs.

Working with veteran professionals is the best way to build your new steel building. Completing the steps that help you decide on different configurations for your pre-engineered building insures your ultimate satisfaction. Each part of the design process should be explained and offered for your approval. Steel building manufacturers should be acquainted with commonly asked questions and should be able to anticipate your concerns.