Questions Often Asked
Does a re-roof require a building permit?
Yes - we are issuing permits for re-roof work within the city limits of Jefferson City. Minor repairs are exempt from permit. A link to our building permit application is: Building Permit
To determine if the structure is within the city limits, please use MidMOGIS. This is an on-line Geographic Information System that is shared by Cole County and the City of Jefferson.
In using the system, click on the "Search" function and type in the street address of a structure. Then use the "Zoning" view from the "Map Themes" function. This shows zoning areas within the city while the county does not have zoning. If a structure does not have zoning, it is located in the county and does not require a building permit A link to this program is:
Is ice and water shield required by code?
Yes - when the 2015 Residential Code went into effect October 21, 2017, Table 301.2(1) was filled out as follows:
Ground Snow Load: 20 psf
Wind Design: Speed_ 115 mph
Special wind region_ no
Wind-borne debris zone_no
Seismic Design Category: B
Subject to damage from: Weathering= Severe
Frost line depth= 24"
Termite_ moderate to heavy
Winter design temperature: 4°
Ice barrier underlayment required: yes
Flood hazards: ordinance passed March 19, 1980; flood maps dated November 2, 2012
Air freezing index: 903
Mean annual temperature: 55°
The following link is a copy of the adopting ordinance for the 2015 Building and Residential Codes: IBC and IRC
How is ice and water shield applied?
Besides the use described below, we also accept ice and water shield as a flashing material.
Section R905.1.2 of the IRC describes the application:
Ice barriers. In areas where there has been a history of ice forming along the eaves causing a backup of water as designated in Table R301.2(1), an ice barrier shall be installed for asphalt shingles, metal roof shingles, mineral-surfaced roll roofing, slate and slate-type shingles, wood shingles and wood shakes. The ice barrier shall consist of not fewer than two layers of underlayment cemented together, or a self-adhering polymer-modified bitumen sheet shall be used in place of normal underlayment and extend from the lowest edges of all roof surfaces to a point not less than 24 inches (610 mm) inside the exterior wall line of the building. On roofs with slope equal to or greater than 8 units vertical in 12 units horizontal, the ice barrier shall also be applied not less than 36 inches (914 mm) measured along the roof slope from the eave edge of the building.
Exception: Detached accessory structures not containing conditioned floor area.
What are the requirements for chimney crickets or saddles?
Crickets are for chimneys that are wider than 30" parallel to the ridge. See the following from the 2015 International Residential Code published by the International Code Council: Cricket Requirements
What are one and two family roof insulation requirements?
When the 2015 International Residential Code was adopted, it was amended to not adopt that version of Chapter 11 Energy Efficiency. Instead, the 2009 version Chapter 11 was adopted by reference. With that, the ceiling (or attic space) R-Value is 38 per Table N1102.1.
What are commercial roofing insulation requirements?
The City of Jefferson did not adopt the Energy Conservation code for the 2015 version of the code. The Building Code just refers to the Energy Conservation Code. Therefore, there really are no enforceable code requirements for building envelope insulation requirements. We are planning to correct that with the adoption of the 2018 version. That adoption effort has stalled with the stay-at-home and social distancing requirements.
However, the 2015 code Table C402.1.3 is stating for Cole County (4 Except Marine) is R-30ci for insulation above roof deck and R-38 for attic and other.
What submittals are required for commercial roofs?
Besides a completed building permit application for the work, a material list with a description of work to be performed shall be submitted as a minimum. Drawings are preferred.