![internachi home inspection school](https://static.wixstatic.com/media/ebd5e8_692b9023aa7d4b9593dd4d66c722aa78~mv2.jpg/v1/fill/w_722,h_406,al_c,q_80,usm_0.66_1.00_0.01,enc_auto/ebd5e8_692b9023aa7d4b9593dd4d66c722aa78~mv2.jpg)
Metal Roof Inspection Guide
This guide for the House of Horrors® in Boulder, Colorado, is currently being produced for self-guided tours.
The guide is based on and refers to the most recent International Residential Code (IRC), which can be found online at https://codes.iccsafe.org/public/collections/I-Codes.
STANDARDS OF PRACTICE
The International Standards of Practice for inspecting the roof system is located at www.nachi.org/sop.
MASTERING ROOF INSPECTIONS
To learn about inspecting asphalt shingle roofs, please visit Mastering Roof Inspections.
Observation
![over-driven-fastener](https://static.wixstatic.com/media/ebd5e8_d5e4e1248df34fc59caaaf6170bc201d~mv2.jpg/v1/fill/w_600,h_338,al_c,lg_1,q_80,enc_auto/ebd5e8_d5e4e1248df34fc59caaaf6170bc201d~mv2.jpg)
Over driven fastener. This may cay cause pooling around the fastener and corrosion may occur.
Observation
![metal-roof-damaged](https://static.wixstatic.com/media/ebd5e8_301ee7624aff48e08827ba1e0198fb99~mv2.jpg/v1/fill/w_600,h_337,al_c,q_80,enc_auto/ebd5e8_301ee7624aff48e08827ba1e0198fb99~mv2.jpg)
Holes not repaired or sealed. Repairs made and will need to be maintained.
Observation
![under-driven-fasteners](https://static.wixstatic.com/media/1f6568_bc84ea29803f43aeab2779beef280b45~mv2.jpg/v1/fill/w_600,h_338,al_c,q_80,usm_0.66_1.00_0.01,enc_auto/under-driven-fasteners.jpg)
Under driven fasteners, fasteners missing gaskets another source of leaks and corrosion.
Observation
![metal-roof-scratched](https://static.wixstatic.com/media/1f6568_a2d607436f3a47dca29c282e7029c6a0~mv2.jpg/v1/fill/w_600,h_338,al_c,q_80,usm_0.66_1.00_0.01,enc_auto/metal-roof-scratched.jpg)
Scratches and scuffs on the finish will decrease lifespan and corrode faster. Debris on the surface and dimples will let water set and increase corrosion potential.
DRIP EDGE
According to 2015 IRC R905.2, a drip edge must be installed on the roof.
Observation
![metal-roof-flashing](https://static.wixstatic.com/media/1f6568_f5a97ac39c224ab0a9e376e0e63b03f6~mv2.jpg/v1/fill/w_600,h_338,al_c,q_80,usm_0.66_1.00_0.01,enc_auto/metal-roof-flashing.jpg)
Kick out flashing missing. Drip edge on the rake not fully secured.
Observation
The minimum slope for lapped, non-soldered seam metal roofs without applied lap sealant shall be three units vertical in 12 units horizontal (25-percent slope).
MANUFACTURER'S INSTALLATION
Download Metal Construction Association's Instructions