[dleighty]

I'm going to put on a new tin roof over the old shingles , the roof is 15'x40
the sheets i can get are 8' and 12' but i need to go 15' so i plan to put a 12'and 4'this will let it the 4'lap the 12' one foot , do i want to keep this seam
the same across the roof or stager the seam by putting the 4' on top then on the next row put the 4' on bottom then back on top for the next . what do you think?

 

[DangerMouse]

i'd do it in 4x8s myself.... that evens out the weight and makes one solid lap.
then when the cat runs across it on a hot day, ....oh never mind...

DM

 

[tinner666]

You need to stagger the seams. Put your sleepers down with that in mind.:thumbsup:

 

[dleighty]

thank you, thats what i was looking for,

 

[hayewe farm]

You do not have to stager the seams. 1' is a minimal overlap, I always go at least 2'. But I wouldn't put it over asphalt shingles or shakes. The metal gets very hot and you could set the roof on fire.

 

[dleighty]

thank you for the good info . it will help .

 

[lemuzz]

You do not have to stager the seams. 1' is a minimal overlap, I always go at least 2'. But I wouldn't put it over asphalt shingles or shakes. The metal gets very hot and you could set the roof on fire.

In N.Z we use metal roofing a lot We also have extremely hot summers, up to 40deg celsius. As an underlay to the roofing we use a tar based paper. As a volunteer fireman I have not seen a fire started by this manner.:thumbup:

 

[dleighty]

good info to know thanks