The mixtures for the mineral filling in Sandwich Construction can contain various materials in order to optimise the structure for the specific radiation exposure and kind of radiation. This is not possible in massive concrete construction as it would compromise concrete curing and the final strength resulting in failure to pass the suitability tests required by the construction authorities. The Sandwich Construction can be designed in such a way that no points with compromised radiation protection occur in the vault floor that may be caused by ventilation ducts and other supply lines. This is a significant cost reduction factor as those weak points do not have to be shielded separately using lead etc. In Sandwich Construction, the mineral filling can be interrupted anywhere without any problems whatsoever. Furthermore, construction joints within the supporting concrete structure can be designed entirely according to operational requirements. In massive concrete construction, this is subject to numerous construction requirements that drive up the price of the structure.

Using high-quality prefabricated concrete components with an even steel formwork surface enables direct application of wallpaper or paint. Plastering of surfaces or installing gypsum board linings is not required. This creates hard and tough surfaces that are resistant to damage e.g. from contact with bed frames. In addition, skirting boards and edge protection measures are not required either. In conventional construction, it is common to design long mazes behind the entries. With the introduction of Sandwich Construction we were able to establish a significantly improved workflow for radiation protection rooms for linear accelerators using mini mazes. This has allowed us to reduce the distance that has to be covered by personnel and patients between door and treatment couch from typically 12 meters to just 6 meters each way. With the same staffing and same shift length this increases the patient throughput significantly. Utilizing the mini maze technology we can replace extremely heavy radiation protection doors traveling on tracks in the floor by much lighter high-speed doors suspended from the top. These can travel with a top speed of up to 0.30m/s, leading to a significantly reduced time for opening and closing. Radiation protection doors are the key to workflow optimization. Radiation protection doors in Sandwich Construction totally avoid the flammable paraffin derived from petroleum. The use of lead can also be avoided.

Reduction of dismantling guarantees on leased land. The dismantling costs of a conventional massive concrete building are multiple times higher than for a radiation protection room in Sandwich Construction, which is why a significantly smaller amount is required for the guarantee along with the associated bond premium.

The sandwich building enclosures can be constructed using precast concrete panels, double wall panels finished with on-site concrete, steel plates, and other materials. After testing for suitability, many locally available minerals or other materials can be used for construction. Due to the variety of available construction materials, there is no dependency on monopolistic suppliers. This keeps the construction costs low.

In case of operation at high energy it can be unavoidable that after lengthy operation the innermost layers of the construction become activated to a previously known extent This can be taken into account using the Sandwich Construction method by employing a layered design, which will allow economical disposal, depending on the level of activation of the individual layers. Based on experience from deconstruction of nuclear power plants, this is almost impossible in constructions from massive poured concrete. To counter the problems caused by high hydration temperatures in massive concrete construction, cement is often replaced by fly ash in the mixing recipe. While the pozzolan qualities are similar to those of cement, the origin of the fly ash is unknown in most cases. If they originate from filters for the exhaust of incinerator plants or similar installations, it cannot be guaranteed that this fine dust does not contain contaminations. These then enter the concrete exposed to radiation and can become activated. This can be entirely avoided using the Sandwich Construction method as for the dimensions typically used here, the mixing recipes do not include any fly ash. In high-energy applications, it is very important to assure that no materials capable of being activated such as Cobalt 59. Europium, and Caesium enter the radiation shielding. By way of appropriate selection of raw materials, the Sandwich Construction allows to guarantee the purity of the material in every single cubic yard using chemical analysis methods during the preparation phase. This is not that easy when using massive concrete.