Basement Drying >> Waterproofing A Basement Wall

Remodeling Your Home? Have You Considered Indoor Air Quality?Controlling Moisture Too much moisture in a home can lead to mold, mildew, and other biological growth. This in turn can lead to a variety of health effects ranging from more common allergic reactions, to asthma attacks, and hypersensitivity pneumonitits, for example. Excess moisture can be in the form of high relative humidity including humidity generated by people and their activities such as showers, cooking, or drying clothes. Water can also come from plumbing leaks, wet boots, or splashing around sinks. Moisture can travel with infiltrating outdoor air (or exfiltrating indoor air) through the building shell, including the foundation. In addition to health problems, high relative humidity or water that enters building cavities that is not allowed to dry quickly can lead to problems such as rot, structural damage, and Waterproofing A Basement Wall premature paint failure.

Methods to control moisture include building an energy-efficient home with proper air-sealing, proper use of vapor barriers and vapor diffusion strategies. The entire building envelope, from the foundation to the roof, should be designed to not only prevent moisture entry, but also to allow any moisture which does enter a means to escape. As mentioned above, people and their activities in a home are big sources of moisture; thus proper Waterproofing A Basement Wall ventilation is also important in order to maintain indoor humidity levels within an acceptable range. Moisture Control Techniques 1. Manage water outside the foundation walls.The ground around the home's foundation should be graded to slope down and away from the house at a rate of 1/2" to 1" per linear foot to drain surface water away from the house. Water from down spouts should be directed away from the house, discharging at least a few feet from the foundation. 

Test any underground drains with a hose to make sure they are working properly. Drains that are not working should be repaired or replaced with an elbow discharge described above. Be sure that driveways, sidewalks, and patios slope down and away from foundation walls at 1/4" per linear foot. In extreme cases, you may have to dig out around the foundation and Waterproofing A Basement Wall replace the fill with an exterior drain tile and with a good draining material such a clean gravel. Because this can be very expensive in existing homes, you should get a few opinions as to whether this is necessary. In some areas, there may not be enough room outside the dwelling to provide proper drainage - in these cases, it is often recommended that interior drain tile and a sump pump be installed to remove water from basements and crawlspaces. This also can be very expensive. 

2. Manage water inside the foundation walls and in the basement or crawl space floor.If the basement or crawl space has a dirt floor, cover it with 6 mil poly, overlapping edges by at least 12 inches. Seal any cracks or joints in the foundation wall or slab with an elastomeric caulk. Read EPA's Indoor airPLUS Construction Specifications "Moisture Control" and Technical Guidance to the Indoor airPLUS Construction Specifications. 3. Use construction techniques to control water, air movement, vapor diffusion, and condensation. Use construction methods and materials which promote the drying of building assemblies. Use construction Waterproofing A Basement Wall techniques which reduce the likelihood that warm, moist air will come in contact with cold surfaces, leading to condensation, mold growth, and rot. This includes controlling air movement and using vapor barriers on the warm side of walls and roofs. 

Proper flashing and drainage techniques should be used to keep rainwater out. There are different strategies to achieve this, and the strategies vary widely depending on the climate. For a good discussion of the approaches, consult a building manual such as the Energy Efficient Building Association's (EEBA) Builder's Guide for your climate. 4. Roofs.It is important that the roof and flashing details and construction effectively keep water out of the house. It is also important that the roof and attic design addresses the issue of moisture in the form of water vapor to avoid condensation in building cavities. There is no single strategy which will work for all houses in all climate conditions. The important Waterproofing A Basement Wall considerations are preventing movement of moisture from the warm side to the cold side of the building envelope, and managing moisture which does pass through the envelope to prevent condensation on building materials. 

5. Ensure the home is properly ventilated, with at least exhaust fans in the bathroom and kitchen and preferably a mechanical ventilation system designed to ventilate the entire house.(See the Air Conditioning Contractors of America (ACCA) Manual D and NYSERDA "Homeowner's Guide to Ventilation" for more information.) High relative humidity (RH) can lead to problems with mold, dust mites, and other biological pollutants. Using exhaust fans in the bathrooms and kitchen can remove much of the moisture that builds up from everyday activities and help to keep RH below 50%. There are exhaust fans on the market that produce little noise, an important Waterproofing A Basement Wall consideration for some people. Another benefit to using kitchen and bathroom exhaust fans is that they can also exhaust odors and pollutants from these rooms. 

These fans can be part of an active ventilation system for the entire house, and help to reduce humidity levels. Vent bathroom, kitchen, and clothes dryer/laundry room exhausts directly to the outside, not into an attic or other enclosed space. 6. Size Air-Conditioning Equipment correctly.More is not always better. Incorrectly sized equipment can lead to operational and cost problems. Oversized air conditioning systems can "short-cycle" leading to rapid cooling without reducing indoor humidity levels. This can lead to a variety of Waterproofing A Basement Wall problems associated with high relative humidity. Heat gain and heat loss should be determined for each house. The Air Conditioning Contractors of America (ACCA) provides a recognized standard procedure in the publication, Manual J®. Equipment should be sized for each individual house because even identically built homes will be affected by variations such as solar orientation and shading which affect heating and cooling loads.

Correct refrigerant charge (not under- or over-charged) and proper maintenance are also necessary for optimum performance of air conditioners. 7. Low Relative Humidity.Below 30 percent relative humidity, people can be uncomfortable and can suffer from dry mucus membranes which can lead to nosebleeds and infections. In general, low relative humidity is only a problem during the winter months, when the outside air contains very little moisture. It is this dry outside air entering the home through cracks and openings in the building shell that causes the inside air to become dry. The greater the amount of outside air which leaks into the house, the dryer the indoor air becomes. By air-sealing and using energy-efficient Waterproofing A Basement Wall construction, uncontrolled air leakage is greatly reduced, a more controlled indoor environment is created, and moisture can be maintained at acceptable levels without the use of a humidifier. Humidifiers require maintenance to avoid becoming breeding grounds for biological contaminants.

The Advantages And Disadvantages Of Flood Defenses

If the code permits, it is probably best to throw away switches and outlets that were flooded and replace them with new ones. (See Step 5).

3.Check your water system for leaks from pipes that may have moved. (See Step 5). Even if your water supply is not safe to drink, it  read more..

Lead Safety At Work

CDC Releases Latest Blood Lead Data, Confirming that 535,000 Children Have High Levels and Disparities Persist. (Hard to Believe that CDC and Congress Cut the Funding, Isn't It?) Despite progress in reducing blood lead levels (BLLs) among children, differences between the mean BLLs of different raci  read more..

Remove Paint If You Dont Know If It Contains Lead

The standard also provides for a program of biological monitoring and medical surveillance for all employees exposed to levels of inorganic lead above the action level of 30 µg/m3 (TWA) for more than 30 days per year. The purpose of this document is to outline the medical surveillance provisions   read more..

Asbestos Testing

Asbestos might still be located in many different structural materials and products, in spite of their age. Consequently, the only way to ultimately know is to have samples of the material in question analyzed. Check your local health office for reports on sampling and testing for more   read more..

Lead Removal Debris Removal

Lead-based house paint was commonly used in homes up until the late 1970s, and was particularly usual before the 1950s. The most customary places to find lead-based house paint are places where high strength is needed, like doors, door frames, windows, woodwork, and furniture. Lead-based house paint  read more..

Crime Scene Technician Certification

In 2008, Karen Evans, administrator of the Office of Government and Information Technology at the White House's Office of Management and Budget (OMB), wrote a memo to all government chief information officers that read, Crime Scene Cleanup Crime Scene Technician Certification in part: 

"The Government's reli  read more..

Black Mold Exposure

Although the largest group of patients had diffuse pulmonary infiltrates, a significant fraction had focal pulmonary disease, meningitis, Mold Remediation Black Mold Exposure or other extrapulmonary disease. Six patients had only a positive serologic test with no other evidence of infection. Excluding the patients who ha  read more..

FEMA Flood Maps And Debris Disposal

Management and Disposal of Flood Debris In response to the flood disaster, the Colorado Department of Public Health and Environment ("Department”) is providing guidance and regulatory relief for the Flood Damage FEMA Flood Maps And Debris Disposal management and disposal of damaged or destroyed structures, vegetation debris, vehicles,  read more..

Grants For Ice Storm Tree Removal

Determine Management Options and Goals
Any disaster debris management plan should include a disposal strategy. Communities need to set priorities for recycling wastes and determine the desired disposal options for the remaining waste. Segregate Hazardous Waste - Be prepared to [M  read more..

Hoarding And Housecleaning

There are clouds in the painting, of course. Almost any one of us would have included those clouds, thick with electricity and rainwater. And there is the wheat field, smudged out like an empty palm, orange beneath the storm-stricken sun. Surely, many of us would have insisted on the wheat as well.   read more..