How do you specify cushion foam for a hospitality project so the installed seating retains the comfort, height, and shape you approved in the design?
The answer is to specify the complete cushion build rather than adding a general note such as "high-density, medium-firm foam" for the manufacturer to guess at.
A complete specification states the type of seat and how it will be used, the foam density, the ILD (indentation load deflection, which is how firm the foam is), the core thickness, the wrap, whether it sits indoors or outdoors, the exact shape, and whether a sample cushion is needed for approval. When any of those details are missing, the manufacturer has to decide while making the cushion, and that is where the finished piece comes out different from what you designed, how it fits, how it feels, or how it lines up with the seating next to it. Getting the foam right is not a small detail, but the difference between a seat that still looks and feels right for years and one that sags and looks worn within a season.
Specifying foam correctly has become more critical as the Neo Deco trend pushes hospitality interiors toward sculptural furniture, velvet upholstery, bold geometry, and rich materials because on these pieces, a foam problem is far more visible than it ever was on a plain minimalist sofa. The Neo Deco direction that dominated Milan Design Week 2026, widely covered by the design press, has brought sculptural shapes, velvet upholstery, and curved forms back into common use, while Elle Decoration's Milan coverage shows the continued pull of curved and modular upholstered seating. On these shapes, a wrong curve, an uneven cushion height, or a difference in firmness between cushions sitting side by side shows the moment the seating is put in place.
At Fabrica Kraft, interior designers can order custom cushion foam made to their exact specifications. They can choose the thickness and shape needed for their hospitality projects. There are no minimum order quantities, and interior designers can confirm their order with a sample before the full run.
What is the best foam for hospitality and commercial seating?
For most high-use hospitality seats, whether a lobby lounge or a restaurant banquette, start with a high-density polyurethane foam and set the ILD (indentation load deflection) according to the cushion thickness and the seating position. A thin dining or banquette seat of one to three inches needs a firmer foam, typically 45 to 60 ILD, because there is so little material between the guest and the seat deck that a softer foam compresses fully under body weight and bottoms out. A deep lounge cushion of four to six inches can run a medium-firm 30 to 35 ILD because the extra depth gives the foam more room to compress before it reaches the base.
The reason to write both numbers, rather than one, is that they describe different things. Density is measured in pounds per cubic foot and relates to how much material is in the foam and therefore its durability potential. In contrast, ILD measures the force needed to compress it, which is the firmness a body feels first. The Polyurethane Foam Association, the industry's technical body, treats density and firmness as separate performance characteristics, which is exactly why a high-density foam is not automatically firm and a firm foam is not automatically dense.
The real deciding factor is not whether a foam is called "commercial grade" but whether the density, firmness, and thickness are made for that seat. When you clearly specify the grades rather than a vague label, it becomes easier to get it right. That’s how the foam range is graded exactly that way. So you can match the grade to the seat with the numbers in front of you. The everyday choice for seats is the high-density, high-quality foam at 2.8 pounds per cubic foot and 35 ILD with a typical lifespan of 16 years.
The firmer luxury foam, also 2.8 pounds but 50 ILD, suits dining-height and upright seats that need more support. The Dry Fast outdoor foam, at 1.8 pounds and 60 ILD, is the outdoor grade, and the super-soft foam, at 1.2 pounds and 12 ILD, is only for backs and toppers, with a typical life of 5 years. On any one piece, list the seat foam and the back foam separately rather than choosing one foam for the whole thing, because the seat needs to be firmer to sit on while the back can be softer to lean against. For the fabric side of the same decision, read What Designers Know About Choosing the Right Upholstery.
What is the ideal foam thickness for a cushion?
The specification must state the foam core thickness separately from the final cushion thickness. A drawing that just says "four and a half inch cushion" does not tell the manufacturer if this measurement is for the bare foam, the foam with Dacron wrap, or the finished cushion after the cover is put on. That uncertainty can change the finished seat height and cause adjacent cushions to sit at different levels. Instead of writing it as "four-and-a-half-inch finished cushion," write it clearly as "four-and-a-half-inch foam core with full Dacron wrap," ensuring that the height is set before any work is done.
Thickness also has to agree with firmness for the seat to feel right, because a thinner cushion puts less material between the guest and the seat deck. For an upright dining chair or banquette, one to three inches of foam at 45 to 60 ILD is the right starting point, which is thin enough to keep the seat height in proportion but firm enough that the guest does not feel the seat deck underneath. For a lounge chair or sofa, four to six inches at a medium-firm 30 to 35 ILD gives the depth and softness a longer sit needs. For a daybed or deep-lounging piece, six inches and above works well, though anything over six inches is typically built from two bonded layers rather than a single cut block.
At Fabrica Kraft, a solid core runs up to six inches, and six- to eight-inch builds are made from two bonded pieces of the same foam at no extra charge. The base the cushion sits on matters too because the same foam feels firmer on a plywood deck than on webbing or a sprung base, which is why a loose block of foam in the hand can never approve the finished seat.
What foam is best for outdoor cushions?
Use dry Fast foam when the cushions will regularly stay outside through rain, sit beside a pool, or need to return to service quickly after getting wet. Its large open-cell structure lets air move through and drains within hours, even after the cushion has been fully soaked. Dry Fast foam is also anti-microbial, which helps prevent the mould and mildew that damp settings invite, and it has a typical life of five to eight years outdoors.
The foam, cover, and underside have to be specified together because an open-cell core cannot drain if the cover, liner, or lower panel traps water inside the cushion. Sunbrella is water-repellent, not waterproof. Water can still enter through the seams, zipper, and underside of the cushion, which is why pairing a Sunbrella cover with Dry Fast foam is the right build for any seat that stays out in the rain.
Outdoor performance should not be used as proof of fire compliance. State the project’s required fire or smolder test separately and request documentation for the complete cushion assembly, because foam, barrier materials, fabric, and finished construction can all affect the applicable result. The Polyurethane Foam Association identifies flammability as a separate specification and testing issue for upholstered furniture.
How do you measure foam for a custom or curved cushion?
Take your measurements from the finished frame or built-in woodwork rather than only from the early design drawing, because measuring before the final finish is in place can miss the extra thickness it adds inside the space the cushion has to fill. For a plain rectangular cushion, the core length, width, and thickness in inches are enough, but for a curved banquette, an L-shaped bench, a tapered seat, a trapezoid, or an uneven module, give the manufacturer either a measured drawing or a full-size paper template.
Every drawing or template should show:
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The seat reference used in the FF&E schedule
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Top and front orientation
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Left and right sides
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All curves and notches and tapers and angled edges
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The foam-core thickness
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Whether another cushion is a mirrored version of the same shape
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Whether the dimensions refer to bare foam or the completed upholstered cushion
Use the same seat reference on the FF&E schedule, template, quotation, purchase order, and package label, as it is important for modular seating, where two wedge-shaped pieces may appear similar yet have different angles or orientations.
Fabrica Kraft quotes non-rectangular foam based on exactly this kind of sketch and cuts each piece to the shape you provide. That willingness to work through the details is what one of our customers, Wendy, pointed out after ordering custom outdoor cushions. As she put it: "I asked a million questions. I changed the cushion measurements and the fabric many times. They answered all my questions immediately and were not bothered that I kept asking questions. The outdoor cushions covers are perfect. Excellent quality and craftsmanship."
How do you test cushion foam before committing to a full order?
Instead of manually approving a small block of foam, approve one entire sample cushion. The sample should be built with the actual foam density, ILD, the core thickness, wrap, and final upholstery construction. The sample should also be tested in the finished furniture frame or an exact copy of the seat base. As you do, check:
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The cushion fits the frame without gaps, bulging, or being forced in
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The finished seat height matches the drawing
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If you can feel the base through the foam
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The front edge springs back when someone gets up
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Cushions sitting side by side stay level, and
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The seams and piping line up between them.
Once the sample is right, photograph it and label it with its seat reference number, density, ILD, core thickness, wrap, and cover, then release the full order to be made to that exact record. This step is most useful on projects with a lot of repeated seating, because a wrong foam choice on one sample is fixed once rather than repeated across every restaurant booth, lobby seat, or guest-room bench, and the same record lets a replacement be ordered later without measuring and rebuilding the original cushion from scratch.
What should a cushion foam specification include?
A complete specification names the seat, how it is used, the full cushion build, and the approval step in one place, so nothing is left for the manufacturer to decide on its own.
For an indoor lounge seat, for example, that looks like:
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Seat type and use: lobby lounge seat cushion, daily use
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Foam grade: high-density, 2.8 pcf, 35 ILD
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Core thickness: four-and-a-half-inch foam core
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Wrap: full one-inch Dacron wrap
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Shape: cut to approved template, one-inch rounded front corner
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Orientation: marked TOP and FRONT
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Sample: one sample in the final cover approved before the rest is made
For a fully outdoor seat, the same list swaps the foam grade to Dry Fast and adds a line confirming how the cover, seams, vents, and underside are coordinated so water can drain from the whole cushion.
Written this way, the line answers the questions that most often hold up an order before they can be asked: which grade is being used, whether the thickness is the core or the finished cushion, and how the shape will be supplied. It also carries into the next order, because a spec recorded once can be reused, which is where real time is saved on a property that reorders.
Why does getting the right cushion foam specification matter?
A hospitality project does not have to lose the comfort, height, and shape you approved between the drawing and the install, because a manufacturer set up for made-to-order foam builds to the spec rather than filling the gaps itself. The payoff is not only the first install but every one after it, since seating specified and recorded this way stays consistent across a floor of matching pieces and can be reordered years later against the record, rather than being measured and rebuilt from scratch.
Fabrica Kraft works with interior designers across the United States, the United Kingdom, Europe, and Australia on this kind of sourcing with trade pricing, low minimums, free shipping worldwide, and each confirmed specification kept on file for repeat orders. You can order exactly what one project needs rather than a bulk run.
Two production facts are worth planning around as you do: the foam and covers are made at different locations and shipped separately, with the foam vacuum-packed, and custom cutting carries a tolerance of about 1 in on length and width and half an inch on thickness.
If you are choosing cushion foam for a live project and want the build confirmed before it goes on the drawing, send the foam list, the dimensions or templates, whether it sits indoors or outdoors, and how many sample cushions you need through the contact page OR write to the team at business@fabricakraft.com, and they will come back with the specification and a trade pricing quote so the piece you designed is the piece your client sits on.
