Moses presents the construction plans to the Israelites in far greater detail than he originally received from God. By laying out the sheer scale of the project, he aims to inspire the people to bring a generous donation for the work ahead [מלבי״ם, ביאור יש״ר]. In presenting these plans, a significant shift in order occurs. While God originally commanded the creation of the inner vessels before the surrounding structure, Moses reverses this, placing the building itself first. On a practical level, this reflects the natural way of the world: one first builds a house and only then brings in the furnishings. However, on a deeper spiritual level, this change stems from the sin of the Golden Calf. Before the sin, the Israelites existed on an elevated spiritual plane, akin to being married to God, which allowed the holy inner vessels to be created first and remain visible to all. Following their spiritual decline, there arose a need for modesty and concealment. Therefore, it became necessary to erect the outer structure first to shield and hide the sacred vessels within [ברכת אשר].
The architectural plans break down the roofing of the Tabernacle into three distinct layers. The innermost layer consists of magnificent curtains that are visible from inside the sacred space [רש״י, גור אריה, משכיל לדוד]. Above this rests a middle layer of goat hair, serving as the primary roof [רש״י, ביאור יש״ר]. Finally, a top layer of animal skins protects the entire structure. The specific phrasing used to describe this final layer suggests it was not two separate covers, but rather a single, unified covering made half of red-dyed ram skins and half of tachash skins [משכיל לדוד, ברכת אשר].
The way these materials are listed reveals a strict hierarchy of holiness. When a structural element is linguistically joined to the previous one with a connecting word, it shares the same level of importance. When that connection is missing, it signals a step down in sanctity. Following this pattern, the innermost curtains hold the highest level of holiness. The middle tent and the outer cover share an equal, but slightly lower, degree of sanctity, and this gradual descent continues all the way down to the foundational bases [אור החיים].
Beyond the coverings, the detailed list moves to the structural frame. This includes the hooks that connect the curtains and the wooden boards that form the walls [אבן עזרא]. These walls are stabilized by connecting bars. A subtle shift in the text hints at a miraculous central bar that ran through the entire length of the wooden boards, holding them together entirely on its own, without any human assistance [מנחת שי, חזקוני, פרדס יוסף]. Finally, the structure is completed by pillars and their bases, which are designed to support both the dividing curtain inside and the screen at the entrance [אבן עזרא].