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Creating the Right Sing Panel

The experts at Sing Core have years of experience in solving the difficult issues that face architects, designers and contractors when face with challenges dealing with uncompromised structural integrity and weight restrictions. Oftentimes the secret to the proper solution depends in a combination of Sing Core and various surface materials. The skin or surface material is not only the appearance of the Sing panel, but it is critical for the true flatness and smoothness which easy to use as paint grade, strength and affects the overall weight. Click here for architectural specs.

Sing Panel comes in three different varieties: Standard, Professional and Hot-Press-Ready-Series

1 True Flat

Surface skin should use same material if possible. The surface material should use less porous materials to avoid moisture absorption. Aluminum is superior to none moisture absorbing MDF, Masonite, etc… The aluminum can be paint grade by using acid etching primer, or other alternatives include adding plywood, particle board, MDF on top of the aluminum using a hot or cold press with veneer or wood stave to create a wood grain doors or panels.

2 Thickness of Skin or Surface Materials

We use material as thin as .020 aluminum, HPL to 3/4 inch, AB plywood and marine grade plywood is the most integrous choice due to the non-void high quality veneer used as plywood core. The most common skins include 1/8” plywood, 1/4″ plywood and 3/8” plywood. But if you are in need of a one-inch thick door that is 20 ft in length then aluminum will be the best option. Please contact us if you need help.

3 Strength

The strength depends on the thickness of the panel. For instance, if you double the thickness it will be 4 times the strength. The thickness of the skin could make up the extra strength but increasing the thickness to gain strength will result in added weight, which may compromise the end result. The answer is usually a combination of matching the right Sing Core width with the appropriate surface material to achieve the desired results without loss of structural integrity or unnecessary additional weight.

4 Sing Core Grids Size Selection

There are 3 types of Sing Core grid sizes:

  • LARGE: 16 square inch
  • MEDIUM: 9 sq inch, and
  • SMALL: 4 square inch

The smaller grids have higher compression strength. Mostly common used are 3 inch x 3 inch at 9 sq inch or equivalent. For extremely lightweight panel, the largest grids size will be the proper choice.

5 Foam Options

Sing Core standard foam which is used to bond and fill the voids in the internal torsion box structure is constructed with EPS foam w/R-value=3. When clients require more stringent values to meet their specification in terms of better sound deadening, higher insulation value, or water resistance then urethane foam will be the idea material to make up the foam part of the Sing Core structure.

6 Solid Wood or Solid Material Implants

The most common materials used in patented Sing Panels includes solid wood edges and standard implant materials are Douglas Fir or soft wood, and poplar. In addition to solid wood edges, other options include aluminum, plastic and FRP (amongst other custom options that can be matched to your specifications) are commonly used to seal the edge to match the skin material. Unless specified otherwise 12″ x 2″ lock blocks are inserted on both sides 28″ from the bottom of the door.

7 Oversized Sing Panels

We can build panels 10 ft wide 50 ft in length on one solid piece that are nearly seamless with extremely high precision. The joined areas will not move according to the moisture or temperature change. This is an example of our integrous true flat technology.

The low cost solution to build a large door is to use our standard 4 ft x 8 ft panel to join together or edge glue, or use plywood strips connect those Sing Panels together. This type of large panel will not be as flat as our factory built oversize Sing Panel but it will be lightweight and adequately stronger than the most common stile and rail solid lumber doors or walls.

8 Fire Retardant Doors

Sing Core fire retardant doors use 3 mm magnesium board or cement board, ceramic tile and light gauge sheet metal as skin(s) to create fire barriers. These could include added wood stave or wood veneer as final skin for the wood grain or paint grade finish. See specifications.

9 Water Resistance

We suggest using urethane Sing Core for water resistance. Urethane foam is closed-cell which does not absorb moisture and/or water. The adhesives we use are water resistance glues. The skin choice for water resistance will usually be aluminum, FRP or marine grade with proper coating.

Click here for architectural specs.

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Sing Panel Q & A

Home -> Products -> Sing Panels -> Sing Panel Q&A

1) Are Sing Panels like other honeycomb core panels?

· Only in appearance. Other honeycomb panels do have a grid system, but generally the grids are left empty.

· Sing Panels feature vertical wood grain torsion box to form the grids. The voids are bonded and filled wall-to-wall with resilient recycled foam (a variety of foams are available to meet your specifications).

· Only Sing Panels are solid as a rock. (Warning: Do not kick a door made with a Sing Panel, you will break your leg before you break the door.)


2) What is the R-value of the Sing Panels?

· The R-Value of Sing Panels using EPS Foam is 3.5 per inch. The R-value of Sing Panels using Urethane Foam is 6.5 per inch.


3) How strong are Sing Panels?

· Very strong. In fact, they are the strongest affordable lightweight building material.

· They have been independently tested by the University of Washington to exceed 660 PSI, and can be custom designed to achieve over 1,000 PSI per your specifications.


4) Do Sing Panels have solid wood edges?

· Yes. Sing Panels feature solid wood (or other solid material) edges. If solid edges are not necessary, consider Sing Sandwich panels.

· The wood edge is visible between the exterior surfaces (or “skins”) on the edges. Edge-banding is available at extra charge.


5) What surface materials are available for Sing Panels?

· Our standard surface material is Luan (lightweight plywood).

· Sing Panels are available in basically any flat exterior building material and is limited only due to availability.


6) What thicknesses are available?

· Standard thickness of Sing Panels are 3/4 inch to 8 inches thick.

· Custom thicknesses are available to meet your required specifications, up to 12 inches and beyond.


7) How big can you make Sing Panels?

· Standard sized Sing Panels are 4 ft. x 8 ft..

· They are available in any dimensions, up to 22 ft. by 40 ft. or larger.

· Note: When ordering oversized Sing Panels be certain to confirm that the panels that you order will meet your performance specifications.


8) Are Sing Panels weather resistant?

· Sing Panels are lightweight, high strength and weather resistant only to the degree of the surface material.

· Sing Panels can be manufactured to withstand the most extreme weather conditions, and are even used in underwater applications (consult with Sing sales staff prior to ordering waterproof Sing Panels).


9) Can Sing Panels resist the heat of powder coating?

· Yes. Sing Panels can be designed and manufactured to withstand the heat of powder coating.


10) Can I bond other materials to the surface of Sing Panels?

· Yes. Many of our high-end millworks adhere other surface materials to Sing Panels when used as substrate.

· Standard Luan (lightweight plywood) surfaces are easily adhered to with regular carpenter glue and cold-pressed.

· If your intention is to laminate other materials to your Sing Panels, you should check with us first, to make sure that you are using the proper bonding agents) to achieve the results you desire..


11) Can I use Sing Panels to make furniture?

· Yes. In fact many leading edge furniture manufacturers are joining the Sing Panel revolution. See: Sing Furniture.


12) Can I hot press Sing Panel?

· Yes. We just finished up a 40 run of hot-press veneer for one job. Tip: When using a wood veneer, some warping could occur. Our expert staff encourages adding a thin later of aluminum between the core and the skin.


Sing Core mission statement: To make life easier, Sing Panels are simple to build with, simple to use and are built to last and this makes them beautiful, so Simple is Beautiful.