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Anne63
Tin Roof
Anne63

I have a roofer coming to replace an old tin roof and he wants to remove the old tin, put down membrane then come back in 4 to 6 weeks to install the new tin panels.

Will the membrane alone provide sufficient protection from heavy rain, etc that may occur in the meantime?
Does leaving the membrane exposed for those 6 weeks reduce it's efficiency over time?

ordjen
Re: Tin Roof
ordjen

What reason does he give for wanting to wait several weeks? Many building products, such as Tyvek, have a short period before they start to deteriorate if not covered. What brand name membrane is he using? I would look up their website and check for their installation instructions.

Anne63
Re: Tin Roof
Anne63

Good idea on getting the brand name. Thank you.

Contractor wants to do the preparation before closing down for the construction holidays here in Quebec. The whole construction industry shuts down for the last 2 weeks of July:(

ed21
Re: Tin Roof
ed21

On roofs usually roofing felt is put down before the roofing. Not sure of the time it can be left exposed, but 4 to 6 weeks doesn't sound too bad. 30 lb felt should be used to prevent wind damage.
If an ice & water shield membrane is being put down, the mfr recommend no more than 60 days exposure to sunlight.

llmotoll
Re: Tin Roof
llmotoll

Yes the membrane will degrade a bit being exposed to UV that long. But it will still function.

We do it the same way, but cover it up sooner. Need to remove the old roof to field confirm measurement to fabricate the new panels. He may not be fabricating it himself, hence the long turn around time.

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