PROTECT YOUR BUILDINGS
Windows can be broken at even
fairly low wind speed by flying debris. Hurricane shutters or pieces of ply over the outside of the
window frame will be good enough for the low wind speeds of maybe a direct hit by a category 1
However, as wind speeds increase
the loosly help pieces of ply will fly off, and hurricane shutters may be good to mid-category
For the best protection
the widows or shutters when closed should be 2 " inside the frame. Window frames can be increased
in depth by simply adding timber around the frame.
The 2 " inset gives room for the
placement of a piece of 1/2" plywood for small windows, and 5/8" plywood for larger
windows, inside the window frame.
An alternative is to use
sliding bolts to secure the plywood. See PDF from "A Short
Lesson in Building Effective Shutters" presented at the Impact of Climatic
Variations on the Caribbean region Hurricanes Meeting, July 20-21, 1999.
|An alternative means to
securerly fix hurricane boards is the use of bolts. We found these were more expensive and difficult to make than using
a wood stip to hold the plywood. The bolt fixed plywood is slightly more
easy to secure and much easier to take down than wood strip fixed
Roofs are mainly lifted
by wind through the same effect that lifts planes with thier wings. So roofs that are fairly flat
produce the greatest lift. So one way to reduce wind damage on roofs is to make them about
Four-sloped hip roofs
perform better under wind forces than the gable roofs with two slopes. Gable roofs with two slopes
will be better than single slope roofs. Research and testing demonstrate that a 30-degree roof
slope will have the best result
Roof overhangs are
subject to wind uplift forces which could trigger a roof failure. In the design of the
hurricane-resistant home, the length of these overhangs should be limited to about 20
The effect of wind on
roofs can be reduced and their structral strength can be increased by:
1. Simply breaking the
wind flow across the roof (and strenghening roof structure) by placing 3 x 2 inch timber along nail
lines at least every 2.5 feet.
2. Tying the timber into
the buidling wall structure.
3. Increasing the
strength of the roof timber and joins. The joists can be the most important
4. Nailing or screwing the roof
iron on more securely.
5. Have overhangs at the
roof edge less than 20 inches accross or make a side roof seperate from main