Figure 36 Special greenhouse floor
(the Greenhouse catalog)
As for the stone, we will use the crushed stone that is stone broken into small pieces to have a firmer
feel on the floor and also to facilitate the movements of people in wheel chairs. This floor will cover the
entire floor and be one foot deep into the ground to prevent water accumulation on the surface of the
floor.
Figure 37 Crushed stone floor
(Little Greenhouse)
To figure out how much crushed stone we will need, we have to multiply the length by the width of the
floor and multiply this result by how deep we want the floor to be. In this case, it will be 33ft by 22ft by
1ft giving us a total of 726 cubic feet. Since this number is in cubic feet we divide by 27 to get your cubic
yardage.
A rough estimate for crushed is 1.4 tons per cubic yards, so multiply 27 by 1.4 to get about 38 tons of
pea gravel.
As for the price, the cost of the fabric is about 40 cents per square foot, according to the online store
greenhousecatalog.com. To cover our entire floor we will spend about $291.00. The price of the crushed
stone is trickier to calculate since its price not only varies per region but it also varies depending on how
much is needed and how much it is available. According to Dirk Braen, “Crushed stone runs from about
$20 per ton for screenings or dust up to around $35 per ton for 3-5′′ stone. Crushed stone that is similar
in size to pea gravel runs about $30 per ton.” (Braen, 2013 ).
To find an estimate of how much we will spend in crushed store we used $30.00 per ton and using 38
tons of crushed stone for our floor, that came out to be $1140.00. Adding this price with the price of the
fabric we will spend about $1431.00 to make our entire floor.