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When you are finished the following steps, you will have an insulated sub-floor in place and be ready to install your final floor finishing such as carpeting, tiles or linoleum. Typically, floors insulated with PlastiSpan insulation will be within 3 C of the room's temperature.

Recommendations:
Ask your building supply professional for the recommended sub-floor sheeting you will need, and the correct way to finish it before installing your choice of flooring material. Different flooring materials, such as carpets or tiles, require different sub-floor sheeting and sub-floor preparation.

1. Follow the Building Code

Be sure to check the National Building Code of Canada or the applicable building code in your region regarding minimum insulation, framing and vapour barrier requirements.

2. Install a Moisture Barrier

Cover the entire floor area with a 6-mil polyethylene moisture barrier to eliminate moisture migration into your living area. Plan your project to place your insulation and 2” x 2” strapping on 24” centres across the floor in one direction.

3. Attach Perimeter Strapping

Attach 2” x 2” strapping around the perimeter of the basement floor using self-tapping concrete screws or concrete nails.

4. Install Strapping and Insulation

Cut the first row of insulation to a 21-3/4” width. Cut subsequent rows to 22-1/2” widths. Make sure the inside edge of the first row of strapping is 23-1/4” from the basement wall. Use the PlastiSpan insulation cut as guides to place successive rows of strapping at 24” centres.

5. Prepare to Lay Sub-Floor

Snap a chalk line across the strapping to ensure the sub-flooring will be put on squarely.

6. Mark the Walls

Mark the wall where the 2’’ x 2’’ strapping centres intersect it to help locate the strapping when attaching the sub-floor. .

7. Stagger the Joints

Be sure to stagger the sub-flooring joints for extra stability. (Hint: Rent an automated nailer, screw gun or stand-up sub-floor screw gun from a building supply store.)

8. Secure the Sub-Floor

Apply adhesive to the strapping. Then fasten the sub-floor directly to the 2’’ x 2’’ strapping using either ringed nails or deck screws every 8”. With an air nailer, use 2” ringed sub-floor or screw nails. With a screw gun, use 1-1/2” or 1-3/4” deck screws

9. Ready for Floor Finishing

Your basement floor is now correctly insulated and ready for your final decorating touch. You should notice that the finished floor is now much more comfortable.

chart

Effective R-Value is an evaluation of heat loss through a completed system.

Nominal R-Value is the stated R-value of an individual material used in a system.