Nailed on first layer roofing felt

[xpuser]

On a tounge n groove deck, why would you nail or just do a tack coat of hot bitumen as opposed to a full layer of bitumen as you would on a plywood deck?


Is it so the bitumen does not get into the grooves, and room below, or somthing else

 

[masona]

Not quite sure what you mean.

 

[xpuser]

It says nail the felt on a tounge n groove roof, first layer only


On say a plywood you would not.

Is perfrorated always need as a forst layer




regards

 

[masona]

On a tounge n groove deck,

It's not recommended on T&G unless it's for a shed roof(?), Exterior plywood is better for expansion and waterproof.

 

[xpuser]

Garage and is already tounge n groove, and in good con, so need to replace

 

[masona]

You'll be better off putting plywood over the top and fix it to the joists, The T&G will expand and therefore damaged the roofing felt in time with hairline cracks