Glass Blocks should be entered in accordance with the following hierarchy:-
(1) Where any external walls or parts thereof, are constructed of Glass Blocks they should be enteredas Windows.
(2) Where the specification for the building refers to specific glass blocks and the supporting technicalinformation of the glass blocks are available then the U-Values, T-Solar and L-Solar values shouldbe entered as User defined Values. The specification and technical information must be provided aspart of the evidence to support the use of this option.
(3) Where the specification and/or the technical information is not available then the following userdefined U-Values, T-Solar and L- Solar values should be entered.
| Build Date | U-Value W/m2K | T Solar | L Solar | Frame Factor |
| Buildings Built pre 2002 |
3.2 (4) |
0.83 (2) |
0.8 (1) |
0.00 |
| Buildings Built post 2002 |
2.2 (5) |
0.71 (2) |
0.8 (1) |
0.00 |
Mike Gordon
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