The r values u factors listed in this tek were determined by calculation using the code recognized series parallel also called isothermal planes calculation method refs.
													
																	R value of a concrete block wall. 
									
																	Concrete block makes a cost effective and structurally sound wall but it has. 
																	Block and cavity fill. 
																	As we said before the r value measures the thermal resistance of a material. 
																	Concrete homes magazine web search 5 18 2010 r value for concrete glass other materials wikipedia web search 5 18 2010 citing ristinen robert a and jack j. 
															
													
									
																	Therefore the doe s value is on the high end of the r value of a log wall. 
																	The increase achieved by injecting aminoplast foam insulation is up to 264 greater than is possible with normal weight concrete. 
																	Cavity wall r values are listed in tek 6 1c r values of multi wythe concrete masonry walls ref. 
																	Walls are much greater than conventional 3 web concrete block walls. 
															
													
									
																	Lightweight concrete is ideal for highest thermal performance concrete masonry wall assemblies whole wall r values for. 
																	Energy and the environment. 
																	For instance if you have a material with an r value of 12 attached to another material with an r value of 3 then both materials combined have an r value of 15. 
																	A wall s thermal resistance or its r value is its ability to slow the transfer of heat from one side to the other. 
															
													
									
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