Full Product Manual

121
General
Product
Information
Tools for
Cutting and
Fastening
General
Installation
Requirements
General
Fastener
Requirements
Finishing and
Maintenance
HardieTrim®
Boards/Battens
HardieWrap®
Weather Barrier
HardieSoffit®
Panels
HardiePlank®
Lap Siding
HardieShingle®
Siding
HardiePanel®
Vertical Siding
ESR-1844 &
2290 Report
Appendix/
Glossary
Working
Safely
Appendix B
Estimating
Siding
All houses can be broken down to triangles, rectangles, and squares.
Using these simple shapes it is very easy to estimate the amount of
siding required.
1. Break down the portions of the house to be sided into the simple
shapes (squares, rectangles, triangles) Figures 12.1 - 12.4.
2. Determine the height and width of each shape.
3. Multiply height x width to determine square footage. For triangles
divide the total by 2.
4. Add all of the square footage numbers together.
5. Subtract large items such as garage doors, large doors, large
windows, and banks of windows from total.
Do not remove small windows, doors, vents, or other small areas
not being sided.
6. Total all numbers. This gives you the total covered area.
7. Use the coverage charts located in this section to determine the
number needed.
8. Add a minimum of 5% for waste. If there are multiple (3 or more)
gables, chases, bump outs, or dormers add 10%.*
* Material for starter strip is included in the calculation for waste.
Wall Area
Height
Width
Height _____feet x width _____ feet =_____ square feet
Gable Area
Height
Width
1/2 height x width = _____ area of gable (square feet)
Gambrel Roof House
A
Width
1/2 (A+B) x C + 1/2 B x D = _____ total area of gable
(square feet)
Dormer Area
Height
Width
1/2 height x width = _____ area of dormer (square feet)
D
B
C
B.1
B.2
B.3
B.4
Trim
Number of HardieTrim
®
Boards:
Trim is applied to corners and around doors and windows. Trim is also used
for fascia board, rake board, band board, frieze board and other details.
1. Determine which areas are to be trimmed.
2. Measure all openings to be trimmed including doors, windows,
vent openings, corners (inside and outside), and other areas.
3. Measure for fascia, rakes, and frieze boards.
4. Add the lengths for corners, fascia, rakes, and frieze and add 5%
for waste.
5. Add the lengths for window and door trim and add 10% for waste.
6. Add the total from lines 4 and 5 to determine the amount
of trim needed.
Disclaimer: The estimation methods in this section are meant as a guide.
James Hardie does not assume responsibility for over or under ordering
of product.
Rake
Board
Band
Board
Corner
Trim
Door
Trim
Fascia
Frieze
Window
Trim
B.5