Term
3 tab asphalt shingles
Arquitectural shingle/laminated shingle |
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Definition
3 feet with 3 sections- 20 yrs- basic
39 inches, 30-40 yrs- give more depth- dovetail look |
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Term
western red cedar
cypress or redwood or pine (otro typos) |
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Definition
| Most popular shingle wood- hard, straight grain, dimensional stability, low weight, impenetrability to fluids. (Thuja Plicata) |
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Term
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Definition
Shingles= sawn
Shakes= split, split and sawn or just sawn |
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Term
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Definition
Grade- Premium, Number 1,2
Fire rating- A,B,C, not rated
Length- 18¨or 24¨
Butt thickness- 1/2, 3/4 1"
Type- hand split resawn, just split etc. |
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Term
Cupping
Checking
Curling
Fishmouthing |
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Definition
Concave shape in the middle of the shake
Cracks in the roof |
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Term
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Definition
Spaces in between the shakes
Bottom end piece of a shake |
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Term
Roof Pitch
lower pitch- costs less but lasts less
high pitch= less maintenance and lasts longer |
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Definition
How steep is the roof- measured out of twelve
( #"/ 12") i.e. 4/12= a 30 degree roof
4 inches rise for 1 foot or run |
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Term
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Definition
| Placed on roof - rain leaches zinc from the metals surface and washes it down roof- zinc retards and prevents moss/ fungi |
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Term
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Definition
| coating steel or iron with Zinc to prevent corrosion |
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Term
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Definition
| decomposition of the Lignin (25% of wieght of wood- important part of the structure of the cell wall- holds it together) in the surface wood cells |
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Term
Sodium Hyperchlorite
Calcium hyperchlorite
granular chlorine |
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Definition
Household Bleach
Swimming pool chlorine (both for cleaning roof)
More powerful bleach forumla |
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Term
Flat Grain
Edge Grain
End Grain |
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Definition
Weakest, easy to match
Stronger and resistant to warping- more rings
Very strong and many rings |
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Term
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Definition
| rain can wash away natural preservatives in the western red cedar- somewhat water soluble are the natural preservatives |
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