Printable View
Printing longspan roofing sheets on-site.
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Previously:
Friction shorts for roofing - GIF
Installing metal roofing tile - GIF
Laying adhesive roofing sheets - GIF
Magnetic roofing boots - GIF
Man dodges flying roofing sheet - GIF
Roofing material lift - GIF
Roofing slate clippers - photo
Not so much printing as forming. Just like they do gutters.
I have noticed many times the tittle terminology possibly gets misinterpreted with language translations/ More especially when the person shooting the video or pictures happens to be unfamiliar with the nomenclature terms of which ever trade they are posting about.Quote:
Originally Posted by hemmjo
Rollforming and installing long lengths of standing seam roofing materials. Might be a bit much to translate from many languages into English.
I agree. Words are all to often misunderstood. The speaker/writer intends to convey some message, while many receivers of the message get some other meaning. Even among those using the same native language.
Looks like a very weather friendly result - nice finished roof
That is exactly like the roof on our house, roll formed on site. Fasteners are hidden within the standing seams.
However, done this way, there will be condensation on the underside. Our roof has plywood and then a vapor barrier underlayment.
How do I know this will have condensation? I have 4 outbuildings built pretty much this same way, sheet roofing without vapor barrier. Moisture is a huge problem, it literally rains inside the buildings...
It is a neat process, BUT, I count 30 spaces between the purlins on the building. Assuming 24" on center spacing, that roof sheet is 60 ft long.
In my area, it is not at all unreasonable to expect a seasonal 150˚f temperature change for that panel, from -20f in winter, to over 100˚ f in the summer. In addition, the sun beating down on that steel sheet could easily raise the steel temperature to over 150˚f.
That 150+˚ temperature change equates to over 3/4 inch change in length. The hidden fasteners MUST be installed properly to allow the panels to slide as required. Even if the temperature change is only 100˚, the movement is a bit over 1/2 inch.
Attachment 49241
It is true that the panel will change in length, but the wood will change as well, so it is the delta between the material thermal expansion coefficients. Looking at the values for fir and steel it is about 3.7 for fir and 11 for steel, so the delta is reduced to 2/3 (ish) of the value you find, so that 3/4" becomes 3/4*2/3=>6/12=>1/2" and 1/2" becomes 1/2*2/3=>2/6=>1/3"
And that amount is spread over 60ft=720" so per foot is 1/2*1/720=> 1/1440" per inch
The fasteners are designed to handle small movements...
