New roof cost? Upgrading from a low slope to a steep slope
I live in Ontario Canada. Im considering all my options to improve my old home’s attic space. You see, we get lots of ice damming each winter. The existing roof has a 3/12 pitch along with an 8/12 cathedral. Im wondering if it is cheaper to have a contractor build a new steeper pitch roof over my existing (or remove the existing for the steeper one).
For my existing roofing I’ve contacted local contractors. They said they’ll remove the existing barn board decking, suck out all the old cellulose to expose the attic floor and attempt to air seal (who know’s if they’ll do it well), open all soffits and add baffles, then install new OSB decking then shingle the decks. They would do all this to the troubled region (800 sqft). Price: $23,000 to $32,000 CAD. To be fair they would be adding new OSB and shingles to the rest of the home too for that price but not the same extensive attic work elsewhere since ice damming is only occurring at the low slope and cathedral regions.
What is the pricing to have a steeper roof installed + shingled? I would do this only over the troubled low slope and cathedral regions? This would make it possible to now have walk in access to the attic for me to insulate and vent how i choose.
GBA Detail Library
A collection of one thousand construction details organized by climate and house part