WATERPROOFING 101 Education on waterproofing will be beneficial to helping you make an informed decision on system requirements, investment costs, and the reliability of the product you are purchasing.
Foundation waterproofing is completed using three different approaches:
Inside waterproofing systems
Outside drainage may consist of extending downspouts away from the foundation, adding positive grade away from the foundation, or installing french drains and drywells to efficiently direct water away from the foundation.
Outside waterproofing consist of excavating to the foundation footer, installing new drains, cleaning the basement wall, and installing a water barrier on the wall. Followed by the area being filled back to grade.
Inside waterproofing systems is commonly known for installing a drain around the inside perimeter of the foundation. The inside waterproofing system is the most recommended and competitive area in waterproofing. Due to the competitiveness you will find many differences between installation materials, installation parameter*s, and system capacity. We'll discuss these three areas in further detail. Thereby giving you the knowledge needed to make an informed decision on choosing your waterproofing contractor.
Materials - A system will consist of a drain and a sump pump(s). The drain is vital to any waterproofing system. It provides the pathway for water to make it's way to the pump. The drain should be durable and have the ability to accommodate large amounts of rapid water intake and water flow. A tile drain should be filtered to stay free of debris and to ensure proper function. The sump pump should have a large pumping capacity at lift, and an inline check valve. A good pumping system will have multiple pumps for additional capacity and failure security. The system drain and sump pump should both have a warranty.
Installation Parameter's - A good system will move water quickly and efficiently away from the foundation. The drain should be installed with a high point furthest away from the pump and consistently lower with pitch until it reaches the pump basin. A drain should never be installed level or on top of the foundation footer. The system will consist of two weep holes on each block and one hole at every mortar joint . The system will lower the water table below the basement floor, therefore reducing the hydrostatic water pressure on the foundation.
Capacity - In waterproofing it all comes down to CAPACITY! A quality waterproofing system will quickly transport high volumes of water. It will have a drain that can easily accommodate large amounts of water efficiently, move the water on a positive grade toward the sump pump, and have a sump system that is able to handle the volume of water the drain is producing. When comparing the different system(s) available the most important question to ask is, What is the capacity of the system? _______________GPH. You can then begin to assess accurately the security level each company and system presents to their customers.
NOTE: 1" of rain fall equals 28000 gallons of water over an acre of land. Average lot size is 1/2 acre. So if we have a rain fall of 1/2" of rain per hour, over a half acre lot the system would need to have a capacity of 7000 GPH ( Sustained ) for complete flood security, or 14000 GPH if rain was falling at a rate of 1" per hour.
There are many different waterproofing companies. However, ARW is the 1st company and only company that has adopted a HIGH CAPACITY PRECIPITATION PER ACRE STANDARD (HCPPA) into a real HIGH CAPACITY waterproofing system. After extensive research, the largest capacity presented by a competitor is 5700 GPH pumping capacity, (The Triple safe system by: Basement Systems).In this case, the foundation drain used will not support a capacity of greater than 3700 GPH (1/2 of what is called for using HCPPA Standard). Others may say they do what we do, but after you take the time and do the research, you will see it is just talk. The HD-HC System built, delivered, and installed in your basement by ARW, is designed with one thing in mind...