InspectAPedia TM
Building & Environmental Inspection, Testing, Diagnosis, Repair, & Problem Prevention Advice Home
Conditioning
Inspection
Ventilate
Inspect/Test
Water
Septic
Directory of Professionals to Inspect or Test a Building
InspectAPedia TM Building & Environmental Inspection, Testing, Diagnosis, Repair, & Problem Prevention Advice |
||||||||||||||||||||||||||
| InspectAPedia Home |
| | Air Conditioning |
| | Electrical | | | Environment | | | Exteriors | | | Heating | | | Home Inspection |
| | Insulate Ventilate |
| | Interiors | | | Mold Inspect/Test |
| | Plumbing Water Septic |
| | Roofing | | | Structure | | | Contact Us |
| Directory of Professionals to Inspect or Test a Building |
||||||||||||||||||||||||||
|
ROOFING INSPECTION & REPAIR CERTIFICATIONS for ROOFING CONTRACTORS CHOOSING A ROOFING CONTRACTOR ASPHALT ROOF SHINGLES SHINGLE LIFE / WEAR FACTORS ASPHALT SHINGLE FAILURE TYPES ALGAE, FUNGUS, LICHENS, MOSS on SHINGLES BLISTERS on ASPHALT SHINGLES CRACKS in FIBERGLASS SHINGLES CUPPING ASPHALT SHINGLES CURLING ASPHALT SHINGLES FISHMOUTHING ASPHALT SHINGLES GRANULE LOSS from SHINGLES HAIL DAMAGED SHINGLES Head lap coating shingle wear LADDERING & STAIR STEPPING SHINGLES MOSS & LICHENS on SHINGLES ORGANIC FELT SHINGLE DEFECTS SPLICE DEFECTS on ASPHALT SHINGLES STAINS on ROOF SHINGLES WHAT ARE ASPHALT SHINGLES FIRE RETARDANT PLYWOOD ROOF INSPECTION SAFETY & LIMITS SLATE ROOF INSPECTION & REPAIR SLATE ROOF PHOTO LIBRARY SLATE ROOF INSPECTION CLASS STANDARDS for ROOFING WARRANTIES for ROOF SHINGLES SHINGLE CLASS ACTION REPORTING SHINGLE FAILURES ROOF FAILURE REPORT FORM WORKMANSHIP & WIND DAMAGE More Information InspectAPedia TM Home & Site Map Air Conditioning InspectAPedia Bookstore Electrical Environment Exteriors Heating Home Inspection Insulate Ventilate Interiors Mold Inspect/Test Plumbing Water Septic Roofing Structure Accuracy & Bias Pledge Contact Us |
Asphalt Shingles Nailed in a Ladder Pattern
|
|
|
The first photograph here shows a sloppy "ladder pattern" installation of strip-type asphalt shingles. While opinions (and expertise) vary among roofers, this ladder pattern shingle application may not be as durable a roof installation as one which staggered the shingle offsets more than a single six inches (or in this case only 3") left and right with each shingle course. On other asphalt shingle roofs, particularly older ones, you may notice that the pattern of fishmouth occurrence on an asphalt shingle roof follows a fairly regular or stair-stepped pattern, or it may follow a regular "ladder" like pattern up the roof such as is shown in these photographs. That's because the fishmouthing is occurring at the butt joints of the shingles where more moisture is passing out of the roof structure into the back side of the shingle above each butt joint.
You can thus determine the actual pattern in which the shingles were applied to the roof. "Laddering," while permitted by some manufacturers and standards, is a less workmanlike shingle installation and may result in a localized early wear area on a roof. Ladder-pattern shingle application shows that the roofer liked to work up the roof from one position for as long as possible before moving. [Photo of fishmmouthed/laddered shingles at right is courtesy of Carl Gerosa, New Rochelle, NY.]
Use links at the left of each page to navigate this document or to view other topics at this website. Green links show where you are in our document or website. If you just "scroll down" you'll miss some important articles. See links at page left.
Particular thanks are due to experts and also consumers who read these articles and suggest corrections, changes, and additions to the material. Content suggestions, technical corrections and content critique are invited for any of the content at our website.
Use links at the left of each page to navigate this document or to view other topics at this website. Green links show where you are in our document or website. If you just "scroll down" you'll miss some important articles. See links at page left.
More expert information on this topic
InspectAPedia TM Home & Site Map - Building Inspection, Diagnosis, & Repair, Environmental Inspection & Testing - Research Website
The Mold Information Center: What to Do About Mold in Buildings, When and How
to Inspect for Mold, Clean Up Mold, or Avoid Mold Problems
Home Inspection Construction Consulting Services & advice for home buyers
Contact Daniel Friedman for website content suggestions or for fee-paid consulting
| Advertise on This Website → |
07/17/2007 - 09/01/95 File: inspect-ny.com/roof/ShingleLadders.htm -- Web page design & content production © Copyright 2008-2001 Dan Friedman -