The roof of my chalet slopes at 45 degrees. I am adding a mud room. My roof is 2×10’s at 24″ centers, sheathed with 5/8″ T &G plywood, shingled with 25 year asphalt shingles. My new rafters, at 22.5 degrees, will be at 16″ centers, attached 8 feet above the eaves. I am planning to strip the shingles and place a 16″ wide, 3/4″ plywood as a base to attach the new rafters to. Do I really need to remove the shingles, or can I just nail the 3/4″ plywood onto the shingles and affix the rafters to it?
Discussion Forum
Discussion Forum
Up Next
Video Shorts
Featured Story

A high-performance single-family home builder shares tips from his early experience with two apartment buildings.
Featured Video
How to Install Exterior Window TrimHighlights
Fine Homebuilding Magazine
- Home Group
- Antique Trader
- Arts & Crafts Homes
- Bank Note Reporter
- Cabin Life
- Cuisine at Home
- Fine Gardening
- Fine Woodworking
- Green Building Advisor
- Garden Gate
- Horticulture
- Keep Craft Alive
- Log Home Living
- Military Trader/Vehicles
- Numismatic News
- Numismaster
- Old Cars Weekly
- Old House Journal
- Period Homes
- Popular Woodworking
- Script
- ShopNotes
- Sports Collectors Digest
- Threads
- Timber Home Living
- Traditional Building
- Woodsmith
- World Coin News
- Writer's Digest
Replies
You will eventually need to flash the junction between the two roofs.