Framing Gable and Shed Dormers Jamestown NY

Whenever adding any type of dormer in Jamestown, it's essential to determine the roof load and design the load path transfer to the existing floor joists or roof rafters. Then you can ensure adequate bearing points, or add framing and install beams to carry the loads through the walls down to the foundation. It wouldn't be a bad idea to consult a structural engineer for guidance, especially on larger dormers.

Local Companies

American Contracting
(716) 664-0350
Post Office Box 522
James Town, NY
Fair Deal Home Repair Llc
(718) 441-0093
8419 Cuthbert Rd
Kew Gardens, NY
A N L Home Improvement Inc
(914) 966-0289

Putnam Valley, NY
L I Carpentry Plus
(631) 864-9655

Commack, NY
Empire Home Inspection
(716) 595-3211
14 First
Lily Dale, NY
Tack Metal Roofing MFG.
716-569-2040
7 White Drive
Frewsburg, NY
Global Urban Redevelopment
(718) 487-1000

Floral Park, NY
Kipp Jason H & Son
(315) 789-7818
580 W Washington St
Geneva, NY
Bil-Ray Siding & Home Improvements of Staten Island Inc
(718) 448-9100
1897 Clove Rd
Staten Island, NY
Williams Ron Consulting & Constr Inc
(585) 624-1137
3870 Rush Mendon Rd
Mendon, NY

Provided By:

Source: TOOLS OF THE TRADE Magazine
Publication date: July 11, 2006

By TOOLS OF THE TRADE Editors

Whenever adding any type of dormer, it's essential to determine the roof load and design the load path transfer to the existing floor joists or roof rafters. Then you can ensure adequate bearing points, or add framing and install beams to carry the loads through the walls down to the foundation. It wouldn't be a bad idea to consult a structural engineer for guidance, especially on larger dormers.

Gable Dormers

Gable dormers get their name from the gable roof covering them. These dormers are built perpendicular to the existing roof plane, with their ridges extending out from the existing roof. This means the sidewalls of the dormer bear and transfer the weight of the dormer rafters to the existing main roof rafters or the existing floor joists in the room/attic below. Which way you decide to support the dormer loads depends on the interior layout you're shooting for.

Bearing on the Rafters. My first choice is to install double or triple roof rafters on either side of the new dormer for the sidewalls to rest on. This eliminates the need to remove attic subflooring to insert additional joists. It also leaves the area beneath the common rafters uncluttered without any walls to interfere with open space and provides freedom to lay out partition walls later.

I locate the position of the dormer and do as much work as possible inside the attic before opening up the roof.

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