Tearoff Quandary?

Bizzy

Hello all. New member here but an old reader. I am looking at a prospective roofing job for a customer. The building is about 4 stories high with a shingle roof. There is a loading dock with a newer metal roof extending the length of one side the building(about 90'). How can I tearoff the old shingles without damaging the metal roof?

Grumpy

I didn't read anything other than the title, but the answer is simple... always tear off.

Ok let me read the rest of what you wrote.

Well special circumstances, 4 stories makes it rough to tear off, but still the best thing for the roof is always to tear it off before installing the new roof.

If you are worried about damaging the lower roof, then protect it. This can be done a number of ways such as purposely avoiding the roof by throwing debris elsewhere or placing plywood and tarps on the lower roof.

How about my personal favorite... upsell the lower roof to be replaced as well

Thunder1

Is the loading dock roof at the 1st or 2nd story level and the shingles are on the 4th?
Can you walk on the metal roof?
Is it sloped?
Or like Grumpy said.
Can you make the case to replace it?
Do you want to replace it?

Sorry, not enough info for a real response (1000 words right Grumpy) but covering with ply/OSB is probably the best bet. If you can, try and screw it down through existing screw holes if it wants to slide.

If you haven’t submitted the bid yet, be sure to emphasize that you will be taking extra precautions for this roof. You should also be able to get the cost of the sheets in your bid and use them elsewhere when you’re done. I usually have anywhere from 4-10 beat up old sheets of OSB around for just this purpose so I only have to consider the difficulty of setup and removal to adjust my bid.

AaronB.

Any debris dropped 20 feet or more must have a trash chute.

There are companies that will rig these up for you. I do not know how much, or who does it, but if you look, you will find. You will also be in compliance with the OSHA regs.

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Grumpy

I usually only use trash chutes on flat roofs. To be honest I have never used one on a sloped roof... I wouldn't even know how.

Bizzy

The shingles are on the 4th story with the metal dock roof at 1st story level. The metal roof is walkable and extends out from building wall 20'.

Would tarps and a layer of plywood be enough protection for a drop that high?

I hadn't considered a chute. May have to check into that.

Thanks for your collective input !

AaronB.

Wall-mounted, like down the sides of high rises.

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Seamless Industrial and Commercial Roofing Systems, Residential Repair. For Those That Demand Quality!
Free roof inspections within 12 miles of our locale.

jmorgan

Rent a chute. I have done this on shingled roofs. Build a plywood ramp for running wheelbarrows right up to the chute top, so the loads can dump easily into the chute. I have also carried the old roof down stairs and elevators in plastic garbage cans. We do condo projects with no roads near the units (walkways only) and the tearoff is a big deal. Have used four-wheelers with carts. Have also used old OSB to protect lower roofs. Have used large tarps and cranes. Wish you luck,
Jim

canadian roofer

Put a dab of PL500 or somthing along that line probable 9 to 12 small dads on the back of a 4x8 to protect the lower, if your worried about the lower not to sure what's happen there anyways just cover the lower with a 3/8 ply carry the expense to the customer

AaronB.

...And drop the trash 3 stories?

__________________
http://www.roseroofing.net/
Seamless Industrial and Commercial Roofing Systems, Residential Repair. For Those That Demand Quality!
Free roof inspections within 12 miles of our locale.

canadian roofer

Ya, that's only 30' what's the problem.Hits the ply and then right in the trailer..

AaronB.

OSAH requires a chute 20' and higher. I would also worry about damaging the lower roof.

__________________
http://www.roseroofing.net/
Seamless Industrial and Commercial Roofing Systems, Residential Repair. For Those That Demand Quality!
Free roof inspections within 12 miles of our locale.