Framing Gable and Shed Dormers Islip NY

Whenever adding any type of dormer in Islip, 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

NEW YORK CITY BEST CONSTRUCTION CORP.
347-26-9950
25 BEECHWOOD PLACE
Massapequa Park, NJ
Bud Albrecht Construction Corp
(516) 797-3233
38 E Hamilton Ave
Massapequa, NY
Mc Ardle Roofing & Siding
(631) 754-3203
23 Tanager Ln
Northport, NY
Oyster Bay Roofing & Sheet Inc
(516) 922-3850
40 Pine Hollow Rd
Oyster Bay, NY
Timberline Roofing
(631) 427-3000
11 Oriole Pl
Huntington, NY
captain soot home maintenance and repair
631 842 2336
60 baylawn ave
copiague, NY
Pro Quality Home Improvements Inc.
631 393 6812
500 Bi-County Blvd.
Farmingdale, NY
Home Improvement Man Inc
(516) 681-3737
92 Ketchams Road
Hicksville, NY
Leafguard Gutter Systems
(631) 968-6854
63 3RD Ave
Bay Shore, NY
John J. Griffin Roofing
(877) 669-6269
619 Sunrise Hwy
West Babylon, NY
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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.

Click here to read full article from Tools of the Trade

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