Allied Waterproofing Systems

Aluminum Joint Sealant

Aluminum Joint Sealant

Metal panels can be an attractive choice for exterior cladding.  They are designed to stand up against a variety of different forces that act against them.   One common metal used to make metal paneling is aluminum because it is generally less expensive than other metals, resists corrosion, and is durable.  Using joint sealants for aluminum presents some interesting challenges that must be addressed.

In order for metal paneling to be watertight, the joints must be designed accordingly because they are usually the only place water can intrude into the substrate.  Whether the joint is sealed or not depends on the design of the paneling.  If the panels have been made to adhere to a barrier design, then the joints should be sealed.  If, however, it is has a rain screen or drainage design, the joints are left unsealed.

Another important consideration that should be addressed using aluminum is how much the metal will shrink and expand.  Metals tend to expand and contract more with thermal fluctuations than some of the other building materials available in Southern California.  This means that the joints between the substrates must be able to accommodate that movement.  Should those joints need to be sealed, a sealant that stands up to these fluctuations should be chosen.

Allied Waterproofing Systems