Irc 2012 Require Siding To Be Installed Over Proper Decking

When using a house wrap as a weather resistant barrier wrb it must meet the 2018 international building codes requirements of a wrb for water resistance and vapor permeability it must also meet the 2018 international residential code irc for water resistance irc r703 1 1 a superior house wrap is air and moisture resistant permeable and has a high uv resistance and tear strength.

Irc 2012 require siding to be installed over proper decking. Many localities allow the use of 1 1 4 inch ipé or teak boards but it s best to check first. The decking is usually 1 in. A drip edge shall be provided at eaves and gables of shingle roofs. Know how many people are aware of this but a supplement to the irc will be out shortly if not already concerning deck connections.

The irc specifies that decking boards must be made from 2 x 6 lumber or composite boards with a minimum spacing of 1 8 inch between boards. Not all jurisdictions will allow the installation of a new roof covering over an existing roof covering. The figure shows the metal drip edge properly integrated below the roof underlayment along the eave and over the underlayment along the rake. Though many builders think of the irc as a low bar bare minimum when it comes to wrb installation the code is actually best practice learn more about the building code for housewrap installation here.

Removing existing siding and installing osb has several benefits such as having brand new substrate on the home and the ability to inspect the wall cavity and all framing insulation and structural integrity of the home before replacing siding. Highlights from the american wood council s prescriptive residential wood deck construction guide a free guide from the american wood council offers a great quick reference and easy to read explanation of the 2012 international residential code irc with a special focus on single level wood deck construction in residential homes. Ledger may not be installed over siding or stucco. One major stipulation with the james hardie siding warranty is that it specifically states that if.

Thick and some siding types require there be a 2 in. Each decking board needs to be attached to each joist with two 8d nails or two 8 decking screws. Air space between the decking surface and bottom of the siding course. Mike guertin often sees housewrap installed improperly.

This may seem excessively tall but is needed in order for the water resistive barrier wrb and siding to overlap the top. Adjacent pieces of drip edge shall be overlapped a minimum of 2 inches 51 mm. This will require exact location of bolts 2. It must be fastened directly to the rim joist or stud or through sheathing into an appropriate framing member.

Drip edges shall extend a minimum of 0 25 inch 6 4 mm below the roof sheathing and extend up the roof deck a minimum of 2 inches 51 mm. The wall leg is at least 7 in.