BKW has developed new technology for raising sections or entire roofs to provide more ceiling
height. Companies adding new equipment or changing work methods may have to raise the
roof of existing buildings to obtain the necessary ceiling height. Raising a portion of the roof
instead of building a new building may be an economical solution to the problem.
Roof before Raising
Roof after Raising,
6000 sf, 6 Jacks
Roof on way up, showing Jacks
Roof in place in 1.5 days
BKW raises roofs using hydraulic jacks that are a permanent part of the building.
The jacks are used for the support columns. Following the roof raising, the raised
section is walled in and sealed. BKW will provide all material, labor, equipment, and
supervision on site. For more information, please visit www.rapidrooflifter.com
Roof Lifting Projects
Roof Raising Location: Chicago, Illinois
Roof Raised: 33' Total Roof Height after raising: 50 feet
Size: 3,200 sq. ft.
Please click here to view BKW's latest roof raising in June of 2012.
Roof Raising Location: Aurora, Illinois
Roof Raised: 47' 3" Total Roof Height after raising: 67 feet
Size: 5,600 sq. ft.
The latest roof raising occurred in Aurora, Illinois, and required a 5,600 sq. ft. section of roof to be raised from 19' 9" to 67' for a 47' 3" lift. The lift required eight 3-stage jacks, along with 105,000 lbs of structural steel and 300,000 lbs of concrete to stabilize against wind loads.
All lighting and fire water systems were installed prior to lifting to prevent work at extreme heights. The roof was first raised 25 feet and the upper portion of the building completed.
The entire complete building was raised the final 23 feet and all structural steel installed and the sheeting completed. The roof was raised at a rate of four feet per hour. The client was pleased because exposure to the weather was held to a minimum, and the cost was approximately one-third the cost of the conventional method.
Before Raised Roof is Added
After Raised Area is enclosed
Close up of new area
Ceiling of Raised Roof
Roof Raising Location: Victoria, Texas
Roof Raised: 20 feet Total Roof Height after raising: 50 feet
Size: 6,000 sq. ft.
BKW, Inc. completed a roof raising job in Victoria, TX, requiring a 6,000
sq. ft. section of a manufacturing plant to be raised from 30 feet of
clearance to 50 feet. The job required eight columns and eight
trusses. The actual roof raising time took 10 hours, and this included
the installation of six vent fans and six vents. The job was on
schedule and under budget.
Columns and roof raised approximately 5 feet
Roof in final position with
Aerial view of the raised roof without siding, showing the magnitude of the plant
Placement of siding on the penthouse.
Roof Raising Location: Mid American Industrial Park, Pryor OK
Roof Raised: 18 feet Total Roof Height after raising: 50 feet Size: 60 x 20 (1,200 sq.ft.)
Enclosed in 72 hrs!
Roof Raising Location: Tulsa, OK Roof Raised: 12 feet Total Roof Height after raising: 45 feet Size: 50 x 20 (1,000 sq. ft.)