Waterproofing Sealing Insulation Process

Generally, the silo waterproofing sealing insulation process for most grain storages can be divided into 2 main components:

• Structural upgrade and general engineering works
• Application of the sealing system to achieve a gas-tight seal

As most grain silos were not originally designed to provide controlled atmospheric conditions within the storage, it can be expected that some structural modification, repairs and improvements will be required.

Firstly, the repair of any existing damage, covering of major openings or voids and strengthening of load bearing structures and supports to accommodate the additional stresses that may be produced as a result of having a gas-tight seal.

Next, the function of doors, conveyor belts, ventilators and exhaust fans may need to be modified so that leakage through these areas can be eliminated.

Finally, fitting internal pressure controls, installing or modifying the fumigation system, upgrading the lighting and fixing safety or maintenance devices will complete the preparatory work before the final sealing process.

The extent of work required will vary with the type of silo in question as well as its age, construction and condition. These elements could represent a significant, or relatively minor, part of the overall waterproofing sealing insulation process.

Often, the amount of structural work required determines the viability of sealing the storage at that time, however, as a general rule, the larger the silo the more economical it is to seal.

The Sealing System

The final sealing system, developed over many years, consists of applying sealing products to all parts of the silo that would allow air or gas to escape from it. The system is often specifically designed for each structure, however, the following considerations will usually be common to most storage types:

• Filling out any large remaining gaps or voids, particularly between roof and wall structures (Click to view pictures)
• Applying a membrane seal over any laps, joints or minor holes (Click to view pictures)
• Sealing porous wall and floor surfaces
• Applying a special heat reflective coating to exterior surfaces to regulate internal air temperatures and minimize pressure differentials
• Provide a sealing structure for doors and other openings that will aid loading and maintenance operations