Thermacore panels are the technical/trade name for insulated garage door panels. They have many valuable uses on a homestead or farm. At $.70/sqft (in our area), they are among the least expensive options for most cases where they can be used.
Thermacore panels are painted steel panels filled with about 1 – 1.5″ of solid foam. They have an Insulation value of about R-9 and because they’re steel, have the possible added benefit of being compatible with magnets. Because they’re metal, they cannot easily decay and are easily cleaned with a power washer, etc. Remember… these are made for garage doors.
The panels are easily cut with standard power tools. We use a circular saw with an old blade installed in reverse. We make finer cuts for fixtures and such with a jigsaw with a long metal blade.
One of our favorite uses for Thermacore panels is for finishing walls in outbuildings, basements, etc. Compared to installing (and more importantly, finishing) drywall (“sheet rock”) which takes several cycles, Thermacore panels go up very, very fast by screwing them to the framing.
With some forethought in framing, they are very structurally sound and stiffen up walls much more than drywall does. If one is okay with the white-colored finish, the attached panels provide a surface that needs no other finishing aside from a wipe down with a damp rag.
We prefer to install the panels vertically because of the paneled appearance of the panels. When doing so, we have found it adequate to fasten with self-tapping hex screws (3″) at the top and bottom and if possible, the middle of the panels. Usually this requires about a dozen screws per panel. This also sometimes requires horizontal blocking in wall framing About half way up the wall.
If installed horizontally, just fasten to the wall studs as you would with drywall. The panels are designed with edges that slightly overlap the next panel creating a nice fit.
Thermacore panels make great wall sheeting for barns, mudrooms, root cellars, rabbitries, some animal stalls (and with great care to handle sharp edges!) and more.
Thermacore panels are very strong. We’ve seen them used for canning shelves, with vertical supports about every four feet. We use them ourselves for barn shelving that hold the largest of plastic tubs filled with all manner of supplies. They are very quick to put up and much less expensive per square foot than a comparable lumber solution. Further, since they’re metal, they’re more forgiving to spills and such.
Raised Garden Beds
Thermacore panels make for very quick and easy garden beds. We’re able to secure them locally in 21″ and 24″ widths and just about any length. Married with 4″ x 4″ corner posts and decorative caps and you have some very nice (and deep) raised garden beds. These panels are metal, and as such could potentially rust if areas without paint are exposed to ground moisture for long durations, but we feel that is less likely to happen compared to wooden beds that would likewise rot.
Thermacore panels would also make great (though opaque) walls for cold frames. Since these panels have an insulation value of R-9, they provide a very easy means for insulating the sides of a cold frame. Too tall for your liking? Just bury them a few inches into the ground.
Ceilings & Ceiling Sheeting
As with wall sheeting, Thermacore panels make for a very fast ceiling solution. Our bank barn has a lower level that is exposed the elements. Thermacore panels attached to the underside of the floor above not only insulate the floor above, but also prevent bees, birds, snakes, and mice from utilizing the space between the rafters.