Attic Sf Design

You might open up your attic and find bare joists with fiberglass or cellulose insulation between the joists.

Attic sf design.

This will give you a visual representation of the dimensions of your attic for reference. 2attic loads may be included in the floor live load but a 10 psf attic load is typically used only to size ceiling joists adequately for access purposes. Let owens corning roofing help you calculate exactly how much ventilation you will need for a healthy and balanced attic with our 4 step ventilation calculator. However if the attic is intended for storage the attic live load or some portion should also be considered for the design of other elements in the load path.

Attic area in square feet. Remember the minimum area requirement when using a continuous system is a ratio of 1 300. Ventilation area in square feet. You can sister the joists by cutting 2 x8 boards the same length as the joists applying construction adhesive and affixing each to a joist with nails.

See how simple. Now let s figure out how much ventilation space we need. Multiple these two measurements to arrive at a square footage number. So in our example we will divide the 1 500 square feet by 300.

Fortunately this is a fairly easy fix. Enter square footage calculate or enter the square footage of the attic or area to be vented. When combined however they form a perfect union. Calculate the square footage of your attic.

Net free area in square inches. If the space includes irregular shapes such as triangles mark these off so that the floor is divided into squares rectangles and irregular shapes. Measure the length and width of the attic space using a tape measure. 1 500 square feet 300 5 square feet.

Ok so now we know the square footage of the attic area to be ventilated. We ve created and launched products used by millions for some of the world s most successful companies. Create a rough sketch of your attic on a piece of paper. A whole house fan can be run from early evening to early morning.

We recommend using an attic fan to boost the ventilation when you are 1 to 2 square feet shy of the venting requirement.