708 3 1 3 draft stop construction.
Attic draft stop material.
O draftstopping must be installed to subdivide concealed combustible attic spaces into areas not exceeding 3 000 sq ft draftstopping materials must comply with the following.
The uniform building code 2009 ed defines a draft stop as a material device or construction installed to restrict the movement of air within open spaces of concealed areas of building components such as crawl spaces floor ceiling assemblies roof ceiling assemblies and attics.
Draftstopping shall be installed above and in line with sleeping unit and dwelling unit separation walls that do not extend to the underside of the roof sheathing above.
Draftstopping materials shall be not less than 1 2 inch 12 7 mm gypsum board 3 8 inch 9 5 mm wood structural panels or other approved materials adequately supported.
The drd is mainly designed to allow passage between attic sections while preventing back drafts from one section to the other.
Draftstopping materials shall not be less than 1 2 inch 12 7 mm gypsum board 3 8 inch 9 5 mm wood structural panel 3 8 inch 9 5 mm type 2 m particle board or other approved materials adequately supported.
Draftstopping shall be provided in attics mansards overhangs or other concealed roof spaces of group r 2 buildings with three or more dwelling units and in all group r 1 buildings.
Attic door the biggest culprit when it comes to cold air drafts in the attic is the actual door connecting your home to the attic.
Once this hole is cut and the insulation removed the builder covers the area with a thin sheet of plywood.
Most builders cut a large hole around 10 feet in the attic to use as the door.
Draft stop access doors are installed to prevent the movement of air within open areas such as attics or ceiling crawl spaces.
Fireblocking accepted materials 2x lumbers 2 layers of 1x lumber 23 32 wsp or 3 4 particleboard 1 2 gypsum board or 1 4 cement asbestos board battsor blanket mineral wool or fiberglass insulation other approved materials.
The integrity of the draftstops shall be maintained.
Just like fire blocking draft stopping aims to stop the fire from jumping between adjacent units.
Must extend to the underside of the roof sheathing draftstopping materials must not be less than o 0 5 inch gypsum board o 0 375 inch wood structural panel.
