Housing and premise codes http://www.unomaha.edu/neighborhoodscan/codeenforcement/foundation.php
"All foundation walls shall be maintained plumb and FREE from OPEN CRACKS and shall be kept in such condition so as to PREVENT the entry of rodents and other pests"
"...minor problems left uncorrected can become major....WATER entering the foundation THROUGH CRACKS,holes or breaks can freeze and expand,causing damage to the foundation"...
1460.18 Exterior Structure
e) foundation walls
f) exterior walls
Inside drain tile/baseboard systems do NOT repair/waterproof cracks,loose-cracked parging and other exterior openings as in pictures/links below.Inside systems do NOT REMOVE expanding-contracting clay or roots etc off the exterior wall,the wall/cracks/blocks can only get worse.Water WILL continue to enter and so too can rodents,termites and other insects.
See underground ROOT? It 'caused' the cracks,deteriorated blocks which then allowed water,insects to enter. http://www2.snapfish.com/slideshow/AlbumID=234828863/PictureID=5169799124/a=122238283_111847456/t_=122238283
Termites cause about $5-6 billion dollars of damage each year,how can they enter?
-Foundation CRACKS Provide Hidden Entry Points for Termites http://www.utoronto.ca/forest/termite/tips8.htm
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