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Old 04-04-2014, 07:59 AM   #1
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Gable addition to cottage.


Im planning a small 10x10 addition for my cottage, below, can I screw the 'valley plates' directly to the tin roof, down into the rafters? Im not sure how to weatherproof under the valley plates though, as obviously water is going to get between the plate and the tin and into the roof. If it were shingles I could just flash under them, but tin?



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Old 04-04-2014, 08:12 AM   #2
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Gable addition to cottage.


There's lots of different style "metal" roofs, which one do you have?
If I was doing it I'd remover the roofing so I could install a valley.

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Old 04-04-2014, 04:52 PM   #3
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Gable addition to cottage.


for metal you will have to take the metal off the main roof the width span the addition is going to be and re cut the roofing to the addition. if there is a seam in the main roof and the addition stays below it then you could take from the seam down
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Old 04-04-2014, 10:21 PM   #4
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Gable addition to cottage.


May want to figure the added snow load on the existing rafter span also.... struts/purlins or sistering may be in order.

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