Tar will become very brittle and will crack eventually.
													
																	Waterproof basement walls exterior. 
									
	
		
	
																	Exterior waterproofing is a highly effective waterproofing method and can be completed on basements with both poured concrete or masonry block walls. 
																	Do not use plastic to waterproof your basement walls. 
																	It s also the most expensive often 15 000 to 30 000. 
																	Exterior basement waterproofing involves digging out the dirt around basement walls applying a moisture barrier and installing a specially designed dimple board that deflects water away from the. 
															
													
									
	
		
	
																	Don t use limestone to backfill. 
																	The surest way to waterproof your basement walls is a full scale exterior waterproofing solution. 
																	The plastic like material will peel and moisture will make its way in. 
																	The following should be avoided when waterproofing a basement. 
															
													
									
	
		
	
																	Exterior waterproofing involves excavating all around the house to the full depth of the foundation walls then installing a waterproof coating or membrane topped by drainage panels. 
																	A waterproof membrane is often installed on the outside of the basement wall and the system also requires putting in a buried sump pump where water will collect and then be pumped to the surface.