How To Determine Lap Siding Exposure Width

Measure the width and height of windows doors and any other areas that will not be covered with siding.

How to determine lap siding exposure width.

Figure 4 3 installation of bevel siding. James hardie provides exposure options lap 5 6 7 8 and 10 in the lap siding panel 4 x 8 4 x 9. Lap siding reveal size lap siding coverage chart area11 12 15 16 100 sq. For each triangle shaped area measure from the base to the top then multiply this measurement by half the base length.

Exposure the minimum lap for bevel siding is 1 inch. The exposure is what will be used to determine the number of courses needed for the wall and ultimately to find the number of linear feet of siding needed. From the standpoint of weather resistance and appearance the butt edge of the first course of siding above the window should coincide with the top of the. This can be found by subtracting the overlap of the boards from the actual board width.

The recommended exposure distances exposure distance is the amount of siding left exposed to the weather are 4 inches for 6 inch siding 8 inches for 10 inch siding and so on as shown in figure 3. Add these measurements and enter them here. The exposure of the board is the amount of the board that is exposed to the elements.