Roof Change Plywood

Most roofs will be sheathed in plywood at least 3 8 inch thick.

Roof change plywood. Moisture causes wood to rot and rotten wood absorbs water even more readily than fresh wood. Step 6 unroll new roofing felt over the new plywood and extend it at least 3 inches over each edge of the new plywood. Secure the plywood by inserting six penny nails along the rafters spacing them every 6 inches. If your roof carries a heavier load like if there s less pitch and or it snows in your area a roofer may recommend the use of the inch variety.

This is a popular option because it presents homeowners with functional but affordable roof sheathing. Rotted plywood cannot support the weight of a roof the way healthy wood can nor can it safely grip the nails put into the roof and keep them held firm. Install a layer of roofing insulation as recommended by the roofing manufacturer. That will suffice on a roof with rafters set 16 inches apart with minimal roof loads.

Loads will vary with the pitch of the roof. A half inch cdx plywood is often used with rafter with 24 inch spacing. Start from the top of the roof and remove the old shingles along with the flashing underlayment and vents. Hammer down any large nails that are exposed by the removal.