Why Architectural Precast?
Architectural precast concrete offers many cost advantages over other cladding materials.
Precast is produced all year round in a controlled, cost-efficient production environment. Additionally it can be installed year round even in harsh winter conditions. This eliminates the need for costly winter weather protection and contributes significantly to compressing the overall building schedule.
Architectural precast can enclose the project quicker than any other cladding material. Typically, more than 100 square metres can be installed each day (10 panels per day at 10 square metres each). Precast’s installation speed can shave months from a construction schedule, thus reducing construction financing cost. Architectural precast is the cladding material of choice whenever superior aesthetics or construction economy is required.
Precast cladding combines the benefits of high durability, low maintenance, excellent fire resistance and energy efficiency. All precast is factory manufactured ensuring consistent quality.
Modified Rain Screen
Modified rain screen assemblies have been successfully used for many years. The back face of the precast joints are caulked tight, developing the air/vapour barrier and the exterior joints are caulked but allow for the exchange of air through the introduction of weep holes and breather openings. The result is an air chamber within the precast joint, vented to the outside. With air chamber pressure equalization to the exterior pressure, there is no force to drive rain into the joint.
Any moisture entering the joint will cling to the joint walls and then be drained out by the transverse seal. Insulation is applied to the back surface of the precast, along with an air vapour barrier and the finished interior surface which then completes the wall assembly.
Modification of the panel profile, panel edges, knowledgeable use of panel connectors, proper joint widths, and the correct use/application of sealant materials are all essential for the proper performance of a modified rain screen joint system.
Please contact Wilco, joint sealant supplier and professional precast sealant applicator who have proven expertise in the above applications, for more specific details, or for information about fire rated joint assemblies.