What Causes Exterior Leaks, And Prevention Methods
Do you think your vinyl or brick wall give you 100% protection from water seeping into your house? Or do actually believe in the tricky commercials that say your Teflon protection paints bars water from interring in? Well, the astonishing answer to these questions is, no.
Water is likely to seep into you walls especially during windy rains because of the pressure of wind that comes along with rainwater and is plausible to slide in through wall joints, nail holes, overlaps and other gaps. Even without the wind, some amount of water will probably be sucked in through materials like wood and bricks because they absorb water.
This problem of leakage was obviously also prevalent in the older times but the walls of old houses were built in such a way that water died out before it could cause any damage to the structure. This is because earlier there were no insulated paints, just the brick walls with cement covering and these cemented brick walls used to have little hollow pockets. Even though the wind rushing in and out of these pockets did not help in keeping the house warm but it surely dried the moisture in the walls. Also, in walls made of brick veneer, there was a sub-layer intended to cover infiltration of weather elements. They were designed in such a way that allowed easy and safe drainage of water. These techniques are the reason why older homes keep protected for 100 years or even more.
Modern houses are, however, quite vulnerable to deterioration due to water leakage. The walls of modern houses are often overfed with insulation materials between the wood or plywood inside and various other sub-layers and these various other casing material often trap water inside walls. These protective materials tend to stay moist for a longer period of time thus, lead to formation of molds. In mild and warmer climate areas, this problem is specially worse because the wood which is saturated with water starts to decay quickly at temperature of 10 degree Celsius and above and molds and fungus start to persist inside the house. In cold climate, this is not a severe problem till the time water does not reach the warmer inside of the wall because otherwise, the cold temperature outside give enough time for walls to dry out before it is warm enough for any damage.
You obviously need a back-up system is in case your exterior finish which is meant to keep at shed and bay the water, starts to act otherwise. The backup system should be such that it must thwart any amount of water to seep in though the cladding and must safely drain water away from the house. One the most common technique of adding a backup layer consists of carefully overlapping a plastic house-wrap in such a way that when the water collides with it, the backup layer leads it away from the bottom. This drainage plane is, however, not 100% protective and after a while you might want to look into other protection from exterior leak.