The number of kg per m3 for a comfortable convertible sofa must be at least 30. This data corresponds to the density of the foam in your sofa, an essential criterion for assessing its comfort. Density is the resistance of the material and it is this which allows us to define whether the user will “sink” into the sofa or not. It thus defines the support provided.
Kg per m3: the density of your comfortable convertible sofa
For a convertible sofa , as for a traditional mattress, we talk about density to characterize the comfort of sitting and sleeping. The higher the density, the firmer the support. Be careful though because the density of the seat and backrest may be different. And for good reason, the seat supports a greater weight than the back of your convertible sofa: to ensure your comfort, this density must therefore be greater than that of the back. A good seat density is generally around 30 to 35kg per m3 while for the back, 20 to 25kg per m3 is more than sufficient.
The density of a sofa: don’t forget the bedding
When looking at the density of a convertible sofa , it is also important to look at the density of the sleeping mattress. Depending on the structure, the latter can be completely independent from the seat of the sofa. This is the case with the Rapido system for example: you have a real mattress in addition to your sofa seat and back. For a mattress, a good density generally corresponds to 50kg per m3 .
But this also depends on the weight of the user: the higher it is, the higher the density must be in order to provide good support. For other models, the bed and the seat of the convertible bench are only one and the same element. This is the case, for example, of the clic clac or the bz. This means that the density of your seat will be the same as that of the mattress.
Does this change for a large sofa? No, the logic is exactly the same for a comfortable convertible corner sofa.
