BAUWER U VALUE CALCULATOR

Please select the values and press Calculate.

Step 1.  What is as-built wall type?   Solid stone or brick wall (prior to 1900) Unfilled cavity wall (1900-1975) Unfilled cavity wall (1976-1982) Unfilled cavity wall (1983-1995) Unfilled cavity wall (1996-2002) Filled cavity wall (2003 - 2010) Filled cavity wall

Step 2.  What is your wall as-built thickness, in mm?   225 330 400 450 500 550 600

Step 3.  How thick you would apply Bauwer Light, in mm?   25 30 40 50 60 70 80 100 120 150

Step 4.  What is Bauwer application area in square meters?  


 

As-built U value, W/m2K  

Improved U value with Bauwer, W/m2K  

Recommended minimal U value, W/m2K  

Improvement % vs as-built U value   %

Bauwer Light, number of bags required  

Bauwer Finish, number of bags required  

L1B Building regulations.
5.12 Reasonable provision would be to upgrade those thermal elements whose U-value is worse than the threshold value in column (a) of a Table 3 to achieve the U-value given in column (b) of a Table 3 provided this is technically, functionally and economically feasible. A reasonable test of economic feasibility is to achieve a simple payback of 15 years or less. Where the standard given in column (b) is not technically, functionally or economically feasible, then the thermal element should be upgraded to the best standard that is technically and functionally feasible and delivers a simple payback period of 15 years or less. Generally, this lesser standard should not be worse than 0,7 W/(m2.K).