Roof Ridge Ent Something Eating Plywood

Ways to work on a steeply pitched roof.

Roof ridge ent something eating plywood.

If when inspecting from the attic and looking up into the slot of removed plywood at the ridge of the roof you see the under side of a roof shingle either the roofer made the ridge vent a bit longer than needed or something else is going on that we d need to check from outside. Most roofs will be sheathed in plywood at least 3 8 inch thick. So much information has been devoted to the subject of roof venting that it s easy to become confused and to lose focus. This gives you 450 square inches of total exhaust.

This option appeals to me. You can use any cheap plywood or even particle board as a short term sheathing on a shed roof but cover it with a layer of rolled roofing. Block the ridge vent with fiberglass in the winter. Venting prolongs the life of the roof.

During the evaluation the roofing contractor will not only assess the condition of the ridge vents but he will also identify issues with shingle wear damaged flashing and more. As sharptooth said it will delaminate in no time if not covered. Roofers use a circular saw to cut a long slot along the roof ridge if there isn t one then cover it with a plastic flap as shown or a flexible vinyl matrix. Vents evenly spaced underneath the roof provide intake.

To calculate an example of exhaust and intake use 25 feet of roof ridge vent. The possibility of slipping and falling makes working on any roof dangerous but it s especially so if the roof rises more than 4 feet for every 12 feet of. A shallow v trough inside the roof just under the peak ridge to catch any infall. A vented attic where insulation is placed on an air sealed attic floor is one of the most underappreciated building assemblies that we have in the history of building science.

Openings along the sides allow air out of the attic cooling the space and lowering your air conditioning bill. That will suffice on a roof with rafters set 16 inches apart with minimal roof loads. Since exhaust and intake must be equal 450 square inches of total intake is required as well. Multiply it by 18 square inches the net free air per foot of ridge.

But the idea is that it would evaporate without falling down onto the insulation below. Loads will vary with the pitch of the roof. Something like tar paper over thin plywood hung from straps. Shingle obstructed ridge vent warning.

Roll roofing is inexpensive and easy to install. Be confident about your roof s performance. So i ll start by saying something that might sound controversial but really isn t. Something tells me this would be worse than the original problem 3 use a half ridge vent.