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Waterproofing Residential Foundations

clock March 14, 2009 18:42 by author blogadmin
Keep your home dry and safe by installing an adequate waterproofing system. It will conserve energy and stop mold growth for your residential foundation.

Many times the terms waterproofing and damp proofing are used interchangeably. The terms waterproofing and interior water diverting are also used interchangeably. All of these terms sound like they accomplish similar goals, though they do not. Understanding these terms is critical if you want to keep your foundation dry and structurally sound. Knowing what these methods can and cannot do allows you to pick the best method for your home.

 

Years ago many homes were spray coated with solvent-based asphaltic products. These materials didn’t actually waterproof foundations, they damp proofed them. These asphaltic coatings only prevent the transmission of water vapor into the concrete. Waterproofing materials prevent the transmission of both liquid water and water vapor. Now, many so called waterproofing companies attempt to divert the water that damp proofing does not stop. These interior water drainage systems do not prevent water from coming through the concrete. They are designed around the fact that water is coming through the foundation and they divert this water to a sump pump that expels the water outside the structure. Obviously this is contradictory to the definition of what waterproofing is.

 

Today the most commonly used material is a rubberized asphalt coating that can be sprayed on or used as a peel and stick sheet product. Whether using the spray or sheet rubberized asphalt it must be protected from ultraviolet light so it must be covered and protected when exposed to sunlight. Next are polyethylene sheet membrane systems. These are three layer systems with the two outside made of high density virgin polyethylene sandwiching a layer of recycled polyethylene.

 

No matter which of these systems that you use it needs to be protected from damage from backfill, to insulate basements and provide water drainage away from the membrane. Soils with high water content produce significant hydrostatic pressures against foundation walls. This hydrostatic pressure can cause water to penetrate the smallest holes and cracks. Thus waterproofing actually consists of a waterproof membrane and drainage next to this membrane which moves water to the exterior drain located alongside the footing.

 

This system of waterproofing is even more important these days due to the fact that homes are sealed tight. Building homes tighter in order to conserve on energy increases the problems of mold and mildew growth because relative humidity increases inside the building envelope. Stopping water from entering a basement makes a true waterproofing system a must these days.  Waterproofing, not damp proofing or water diverting is the answer to a healthy and dry home. Knowing what is available and what is necessary for your home is the key to making your home dry and safe.



International Building Code - Changes for Helical Piles

clock March 13, 2009 10:35 by author blogadmin
The International Building Code changes the structural provisions for helical pile foundations.

The International Code Council's 2009 edition of the international Building Code had 350 proposed code changes to the structural provisions in Chapter 16 through 23 of the 2006 IBC. Of these, about 200 were successful and will be incorporated into the 2009 edition.

Section 1704.10 - Special inspection requirements were added for helical pile foundations that are now included in Chapter 18.



Wet Basements and Spring Rains

clock March 12, 2009 14:02 by author blogadmin
Excess water in your basement can lead to foundation damage. Hire a foundation engineer so you can get quality service and permanently keep your home dry.

Spring Home Improvement - Part 2

 

Solving structural foundation problems can be accomplished with steel push piers, helical piers, plate anchors and helical tiebacks by foundation experts. The type and method of foundation repair should only be prescribed by a trained expert. High quality foundation repair methods can be installed very quickly with less inconvenience than other methods. Your foundation will be secured and the original elevation will be retrieved maintaining the original integrity of your home.

 

The next step is to make sure that rain water is not running down the outside of your foundation walls. The best approach is to start at the top and work your way down. At the top is your guttering and downspouts. Gutters need to be secured and cleaned so that rain runs toward downspouts freely. The downspouts then take the water down to ground level where they must be directed away from the foundation. This can be accomplished with splash blocks, extenders or an underground system that takes the water through a series of piping and out beyond the zone of influence.

 

Grading the soil downhill is the next step. This is a very important step in the process of eliminating water problems. Mulch and debris must be removed before adding a clayey soil slope out approximately ten feet from the structure. This gentle slope directs water away from the home and prevents water pooling and hydrostatic pressure on foundation walls. Any cracks or gaps between concrete driveways and slabs should be filled to prevent any water infiltration. These gaps are often overlooked by homeowners due to their small size and location. Water runs across the concrete and is funneled into these gaps causing large amounts of water causing erosion and undermining, which opens voids for water to rest. Preventing water from attacking your foundation is the first step to preventing the need for foundation repair solutions.

 

Upon completing these easy steps you will be able to enjoy your basement this spring and summer without worrying about unexpected flooding. If your home has a crawlspace, the area under your home will be dry and mold free without paying for an encapsulation system that traps large amounts of water and mold under a thin layer of plastic that only hides your real problem. Do not fall for the scare tactics and bad advertising, use these simple steps to permanently keep your home dry and structurally sound.

 

Always remember, hiring a foundation engineer is your best insurance to getting a high quality job done right and not being sold a very expensive band aid.

 



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