joer Loc: Colorado/Illinois

25 deg. F and these guys are replacing a neighbors roof. This section of the roof took less than 15 minutes to clear. That is team work in action.

I shot this at an angle through a dirty closed window.

(Download)

imagemeister Loc: mid east Florida

Wow, a particle board roof - not even plywood !
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SS319

Please do not try this at home. no fall restraints, no fall protection.

I apologize, this site is about photography, I WILL go back to my room.

imagemeister Loc: mid east Florida

No facemasks either !

joer Loc: Colorado/Illinois

It's an engineered wood product, better than plywood.

joer Loc: Colorado/Illinois

The old fashion way.

imagemeister Loc: mid east Florida

Oh yes, "engineered" wood product - LOL

joer Loc: Colorado/Illinois

And cheaper
That is what you get when you spend $300K on a house in current times...built to mimum codes.

Its actually Oriented Strand Board (OSB).

amfoto1 Loc: San Jose, Calif. USA

I worked construction when I was a lot younger.

I would MUCH rather work on a roof in 25F temp than in 125F (and, yes, I've done both.... thankfully the 125F was a very small roof).

Roof tear-off is usually a fast job. It's the new roof installation that takes some time, though some are faster at it than others.

That underlayment is commonly called "chip board" (not "engineered wood"... technically both plywood and chip board are types of that... and there are many others). It's made the same way as plywood, thin layers of wood with grain orientation running in different directions to add strength, glued together. But where plywood requires very long, continuous, thin pieces of wood in each of its layers, chip board uses smaller pieces and costs less. Very similar strength for any given thickness. It's perfect for floor and roof underlayment. For a roof it's probably at least 1/2" or 5/8", maybe even 3/4" if it's in a high snow load area. If you ever had to haul 4' x 8' sheets of that stuff up a ladder and then wrangle it into place in a strong breeze, you come to appreciate the the lighter weight stuff!

EDIT: Yes, "oriented strand board" or OSB is the formal name for it... "Chip board" is a more common name I've heard used.

There are any number of types of "engineered wood". One is "particle board" like they use a lot in cabinets, underneath paint or some sort of veneer. It's sometimes used for flooring, too. There's also the stuff that's used for Ikea shelves and furniture and similar... might be called "fiber board" and is sort of like cardboard on steroids. There's also a denser version of that used for some products.

joer Loc: Colorado/Illinois

Thanks for the detail. Yes, each has its strengths and weaknesses. It kind of like comparing DSLRs to ML cameras.

I know one thing for sure...nothing would get me up on a roof at my age.

flip1948 Loc: Hamden, CT

Better is a relative term.

Particle board is cheaper than plywood, but cannot hold a candle to plywood when it comes to strength, the ability to hold a nail or screw, or its performance with respect to moisture.

I did drawings for 4 different structural engineers over a 40 year span. I worked on a number of different building types from houses to commercial and industrial buildings, schools and apartment buildings.

I also did some design work on my own, mostly houses. One thing I can tell you is I never specified particle board of any type for floor, roof or wall sheathing. It was always plywood, usually 3/4" tongue and groove for floor sheathing.

Particle board is fine for cheap furniture, but plywood is superior for strength in building, if you can afford the extra "initial" cost. I say "initial" cost because a plywood framed building will last significantly longer.

Just my opinion ( backed by some fact).

joecichjr Loc: Chicago S. Suburbs, Illinois, USA

We had a crew of six do the whole house and garage in four hours

Hal81 Loc: Bucks County, Pa.

They heard the drinks were on the house.

joer Loc: Colorado/Illinois

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joer Loc: Colorado/Illinois

https://www.bing.com/search?q=oriented+strand+board&filters=ufn%3a%22oriented+strand+board%22+sid%3a%2267827177-5f84-6ac7-aa13-a101efb5720f%22+catguid%3a%22301a0670-fa6a-be85-f681-31eb6fa6fe01_cfb02057%22+segment%3a%22generic.carousel%22&FORM=SNAPST&epw=1

Do a little reading.