Chapter 21

Roof Plan Layout

2

Links for Chapter 21

Lines and Symbols

Materials

Drawing Roof Plans

3

Lines and Symbols• Roof Shape - Steeper

pitch means a smaller overhang– Use a solid, bold line for

changes in roof shape– Lines representing walls

are thin and dashed

RIDGE

4

Lines and Symbols• Hip is a line that is

drawn to represent the exterior intersection between two roof planes

• An interior corner is called a valley

RIDGE

45

45

5

Lines and Symbols• A Dutch hip roof is

drawn with a gable wall– Typically 48” to 72”

from exterior wall– Partial sections may

need to be drawn if roof is complicated

RIDGE B

RIDGE A

6

Lines and Symbols• Bay windows require

special consideration– Square walls of the

bay– Lay out ridge line– Extend lines for roof

overhangSTEP 1 STEP 2 STEP 3

7

Materials• Structural

material is represented with a thin line showing the proper direction and span

1

RAFTER SIZES MAY BESPECIFIED ON THE PLANOR IN A SCHEDULE

12x6 RAFT

@ 24"O.C. STD ROOF TRUSSES@ 24" O.C. - SEEDRAW BY MANUF.

1 2x6 RAFTERS@ 24" O.C.

8

Materials• Nonstructural

material (vents, skylights, chimneys, and downspouts) are locally noted

SOLAR PANELS

U.L. APP'D METAL CHIMNEYCANT STRIP

SKYLITE

RIDGE VENTS

DOWNSPOUT

CHIMNEY

9

Materials• Chimney

– Metal ones are represented with a 14” circle– Masonry ones are 16” square

• Skylight– Connected to the ceiling with a chase or well– Allow extra light into rooms

10

Materials• Gutters and Downspouts

– Used to remove water from rain off the roof– Diverters are used if there is not a lot of rainfall

during the year– Represented with a 3” square or circle– “H” is for the high side and “L” is for the low

side of the gutter

11

Dimensions• Very few

dimensions are required

• Only overhangs and openings are dimensioned

13'-0" 28'-0" 19'-0"TYP.24"

13'-0"

TYP.24"

12

Drawing Roof Plans• Draw perimeter walls and supports• Draw overhang limits

– 1’-0” for gable end walls– 2’-0” for eaves

• Draw ridges, hips, and valleys• Insert nonstructural materials

13

Drawing Roof Plans• Add dimensions for overhangs and skylights• Label all materials using local and general

notes, title, and scale• Check the drawing for completeness and

quality

14

Drawing Roof Plans

2'-0"TYP.

19'-0"

1'-0"TYP.

6'-0"

DOMED PLASTIC24" X 24" DBL.

ROOF PLAN1/8" 1'-0"

SKYLITE

- PROVIDE SCREENED ROOF VENTS @ 10'-0" O.C. (1/300 VENT TO ATTIC SPACE ).

- USE 300 # COMPOSITION SHINGLES OVE- USE 1/2" CCX PLY @ ALL EXPOSED EAV

15 # FELT.

GENERAL NOTES:

JOIST SPACE @ ALL ATTIC EAVES.

PLUMBING CONT.INSTALLED BYSUPPLIED BY OWNERSOLAR PANELS

3- 24" X 76"

- PROVIDE SCREENED VENTS @ EA. 3RD.

W/ 26 GA. METALFLASHING

CHIMNEY. FLASHLINE OF MASONRY

12"Ø SCREENEDRIDGE VENTS

DOMED PLASTIC24" X 36" DBL.

OPENABLE

TYPICAL DOWNSPOUT

SKYLITE

15

Drawing Hip Roof Plans

SUPPLIED BY OWNER

SKYLITE

DOMED 24" X 24" DBL.

PLUMBING CONT. INSTALLED BY

SOLAR PANELS 3- 24" X 76"

FLASHING W/ 26 GA. METAL CHIMNEY. FLASH LINE OF MASONRY

- USE 300 # COMPOSITION SHINGLES OV

- USE 1/2" CCX PLY @ ALL EXPOSED EAVES

- PROVIDE SCREENED ROOF VENTS @

- PROVIDE SCREENED VENTS @ EA. 3RD.

10'-0" O.C.

15 # FELT.

GENERAL NOTES:

JOIST SPACE @ ALL ATTIC EAVES.

RIDGE VENTS 12 SCREENED

TYPICAL DOWNSPOUT

24" X 36" DBL. DOMED PLASTIC OPENABLE

TYP.

2'-0"

19'-0" 6'-0"

TYP. 2'-0"

ROOF PLAN 1/8" 1'-0"

PLASTIC

SKYLITE

16

Drawing Dutch Hip Roof Plans

TYP.2'-0"

19'-0" 6'-0"

2'-0"TYP. 1'-0"

TYP.

6'-0"TYP.

SKYLITE DOMED PLASTIC24" X 24" DBL.

FLASHINGW/ 26 GA. METALCHIMNEY. FLASHLINE OF MASONRY

24" X 36" DBL.DOMED PLASTICOPENABLE

ROOF PLAN1/8" 1'-0"

SKYLITE

TYPICAL DOWNSPOUT

SUPPLIED BY OWNER PLUMBING CONT. INSTALLED BY

SOLAR PANELS 3- 24" X 76"

- USE 300 # COMPOSITION SHINGLES OV

- USE 1/2" CCX PLY @ ALL EXPOSED EAVES

- PROVIDE SCREENED ROOF VENTS @

- PROVIDE SCREENED VENTS @ EA. 3RD.

10'-0" O.C.

15 # FELT.

GENERAL NOTES:

JOIST SPACE @ ALL ATTIC EAVES.