Roof Truss Uplift Repair

Repair roof truss uplift problems before the start.

Roof truss uplift repair.

This requires replacing a portion of the ceiling drywall and in most cases will require that insulation be moved around in the attic. Roof truss uplift occurs when the bottom chord of the truss is exposed to significantly different moisture or temperature conditions than the rest of the roof truss. Roof truss uplift occurs when the bottom chord of the truss is exposed to significantly different moisture and or temperature conditions than the rest of the roof truss. Let s assume that the calculations for our building require a roof that can withstand 23 pounds per square foot of uplift force in the field of the roof.

Because fm approvals requires a 2 1 safety factor roofs with field of roof uplift forces of 30 pounds per square foot are the maximum for 1 60 ratings and 37 5 pounds per square foot are the. The website is 100 free. Depending on how serious the roof truss uplift is one method to consider is to open up the ceiling along the wall line and insert the new ceiling joist into position. Remove all of the ceiling screws within 16 inches of the corners at the center partitions and all the wall screws within 8 inches of the ceiling along the wall.

Patch the holes in the drywall with dry wall joint compound and repaint the walls and ceilings. For example if the bottom of the truss is buried in insulation while the remainder is in the open attic air this condition can occur. The ceiling drywall attached to the truss chords moves causing cracks at the ceiling wall junxture. If not and you need to repair existing truss uplift problems complete your repair in two phases during winter and summer by using proper l brackets drywall clips and retention blocks.

Thiscreates a gap in the winter that closes in the summer. Truss uplift usually occurs when the truss is exposed to a change in moisture and or temperature conditions causing the truss to arch up in the center. Remove or cut free the nails from inside the attic.