A Guide to Insulating a Steel Building
One of the
benefits of pre-engineered steel
buildings is they can be insulated more effectively than
wood-frame alternatives. This translates to higher energy efficiency, which can
help you cut back on heating and cooling costs. That said, you must choose and
install the right insulation to maximize the benefits.
At Armstrong
Steel, we can customize your steel building to meet your unique requirements
and ensure that it’s easy to insulate with modern insulation methods. We make
sure there are no gaps in the ceiling and walls for cold air or heat to seep in
and affect indoor temperatures. If you don’t know which insulation material or
technology to use, this guide will help you make an informed decision.
Why
insulate your steel building?
The right
insulation can add decades to the lifespan and structural integrity of pre-engineered steel buildings. It can increase the insulation value
and reduce heat loss and gain. It also simplifies interior climate control
management to make it easy to maintain comfortable temperatures.
Insulating a
steel building doesn’t just ensure proper indoor temperatures and humidity
control. The right insulation material also decreases condensation and offers
soundproofing benefits.
Ensuring
effective insulation
Using the right
heat-saving technologies with suitable insulation materials is the key to
ensuring effective insulation in pre-engineered
steel buildings. The
goal is to create an adequately sealed environment. Strategically placed
insulating materials can make all the difference — after all, approximately 26%
of heat loss happens through the roofing, while walls account for an extra 33%.
So, insulating these areas will help maintain a cooler or warmer building.
If you have an
existing steel building, pay close attention to the roof and walls because
these areas are highly susceptible to heat loss. The roof is directly exposed
to the elements, especially rising heat, causing it to deteriorate. The damage
can result in holes where cold air can enter your building.
What
are the best insulation materials for steel buildings?
Foam boards,
fiberglass rolls, and reflective insulation foil are some of the best materials
for insulating pre-engineered
steel buildings. These options excel in thermal regulation and
heat absorption, making them effective at minimizing heat loss.
When using effective
materials, consider the insulation requirements of your steel building. Your
budget and desired R-value can impact those factors. Let’s take a closer look
at each insulation material:
Reflective
insulation foil
Reflective
insulation foil is a budget-friendly option. It's less effective on its own compared
to fiberglass or foam boards; combining it with other materials can
significantly improve the insulation of a steel building. While this might increase the overall cost,
it's a worthwhile investment for better energy efficiency.
Fiberglass
insulation
Fiberglass is
among the most popular materials for insulating pre-engineered steel buildings because it’s known to have
the lowest installed cost per R-value. It comes in different facing solutions
to meet your aesthetic requirements without compromising durability. Plus, it’s
easy to install and causes minimal stress on equipment. If you’re environmentally
conscious, you will also appreciate the fact that fiberglass is an eco-friendly
material.
Standard-faced
fiberglass is a popular and cost-effective choice for insulation. But in order to make sure that it meets energy
codes and prevents condensation, you have to install it to a depth that’s
slightly greater than or equal to the wall girts. Be sure to fill any remaining
cavity space, too. We can help you determine if your steel building is suitable
for standard-faced fiberglass and ensure a proper installation.
Foam
boards
Also known as
polyisocyanurate insulation, rigid foam boards reduce thermal bridging in pre-engineered steel buildings
because of their continuous configuration. They have durable facings to suit
your aesthetic needs while meeting most building codes. However, they can be more expensive than other
options, and installation costs can further rise due to the need for custom
lengths. It's also important to consider joint conditions and work with us to
ensure accurate building lines and trims.
Foam boards can
be left exposed or concealed with a liner panel. If left exposed, they must
have a Class A fire rating for safety. If you prefer to cover them, use a
22-gauge liner panel.
Other
insulation options
Fabric
liner system
After installing
the metal wall panels, unfaced insulation is set between the girts and set in
place by insulation hangers. From there, you can install a fabric liner system
over the insulation and girts. This insulation method suits most retrofit and
new situations and meets most energy codes. It’s easy to install and delivers a
high-quality air and vapor barrier with an attractive finish. The downside is
that it can be more complex to install and may make accessing the purlins for
HVAC, electrical, or maintenance difficult.
Filled
Cavity Systems
Two wall
insulation products can be used to fill the girt wall cavity in pre-engineered steel buildings.
In both cases, a thermal break tape will be placed on the girts’ outside face
before installing the wall panels. Filled cavity systems can prevent bugs and
air leaks, making them helpful in preserving air quality in your building. They
are easy and affordable to install but can disrupt the purlins.
Spray
Foam Insulation
If you have a small steel building, spray foam
insulation may be effective. However, it may void warranties and can become
more expensive than fiberglass (especially for larger structures). Please
consult with us to determine if it's the right choice for your building.
Consult
our building experts.
Let our team take
the guesswork out of choosing a suitable insulation for your pre-engineered steel buildings.
Call 1-800-345-4610 to speak to one of our experts. If you have yet to build a
metal building, you can get a quote by filling out our form here.
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