Framing Gable and Shed Dormers Ithaca NY

Whenever adding any type of dormer in Ithaca, 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

Wallenbeck Painting & Staining
(607) 277-6249
5 Maxs Dr
Ithaca, NY
Ferrara John J
(718) 447-8452
24 Brentwood Ave
Staten Island, NY
Custodial Maintenance Inc
(315) 446-4647
5012 Woodside Rd
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Kevin Wrynn Carpentry Inc
(718) 746-3798
1901 Murray St
Whitestone, NY
Tri-C Construction
(607) 732-3561
2124 College Ave
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Premier Remodelers & Builders Inc
(607) 272-2820
712 W Court St
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O'connor S Painting
(607) 277-5667
417 N Geneva St
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Barclay Butera Homes
(212) 207-8665
979 3rd Ave
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Excellent Roofing
(718) 979-3385
380 Lincoln Ave
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Repp Construction Co Inc
(716) 662-5605
3810 Taylor Rd
Orchard Park, 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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