Most you see on homes and many commercial building is non structural metal roofing and needs to be on solid sheathing.
Skip sheathing metal roof.
You ll want to use both longer sheathing nails and longer roofing nails.
Traditionally skip sheathing consists of 1 inch by 4 inch boards nailed to the rafters with gaps between the boards.
Exposed or hidden fasteners.
And unlike asphalt slate or clay roofs that hold onto solar heat after the sun goes down metal quickly releases its heat back into the atmosphere.
Many metal roofing dealers specify minimum of 7 16 sheathing.
Lets pretend the roof design details are conventional and so the roof deck sheathing will be 5 8 to 3 4.
The underlayment is very important.
The easiest way to do this is to have solid sheathing with taped seams that s your air barrier covered with roofing underlayment.
On top of your insulation you need an air barrier.
Osb or plywood over skip sheathing makes for a much stiffer roof deck resists problems with expansion better and obviously doesn t require all the hassle of removing it.
The roofing is manufactured in panels that.
Design depends on type of metal roof.
Sheathing with gaps between.
The tile roof system leaks like a seive the metal roof contractors are proposing laying the 30 felt paper directly over the skip sheathing.
I am having a stone coated metal roof installed on my house that has a tile roof.
First of all thanks for selecting a metal roof.
Under the tile there is no felt paper or solid sheathing.
There is only skip sheathing present.
The rest of the roof would be covered with titanium psu30 or something similar.
The entire roof deck is relatively uniform where you can step on any part of it without slipping through spaces.
Tin roofing also known as metal roofing is considered more durable than composition or wood shingles.
Installing over skip sheathing is fine.
And you b don tneed to sheath the roof the difference in price between a 4x8 sheet of osb or ply and 8 pieces of 1x4x8 for exmple is big.
Board and batten pan and ridge panels.
Installing wood stripping under a tin roof.
Next purlins parallel to the eaves and then roofing.
After you strip the roof do spot repairs to the existing sheathing where needed then go right over it.
The time saved in humping edless 4x8 sheets up onto the roof nailing them off and creating staging areas to work from is b huge as you install the strapping purlins at 24 oc you are creating a.
As well as all valley s.
On metal frame building and the like you will likely see structural metal roofing installed on purlins that is what those 1x4 are purlins and those metal roofing panels are rated for that type of installation.
Skip sheeting or spaced sheathing is just as it sounds.
Most formed metal roofing the type that imitates wood slate or clay comes with a built in thermal break that insulates against heat passing to the roof deck below.
Grace ice and water shield or titanium udl50 is recommended along the eave up to 3 0 beyond the inside of the exterior wall.
