How To Look At A House

McGarry and Madsen's home inspection blog for buyers of  

site-built, mobile/manufactured and modular homes


Monday, May 21, 2018

Here’s links to a collection of our blog posts about "ROOF AND ATTIC":

Why is my roof sheathing sagging between the trusses?

Are H-clips required by the building code for roof sheathing?

Why is granule loss a problem for an asphalt shingle roof? 

What are the mistakes to avoid when doing attic improvements?

What causes roof shingles to curl up at corners?  

What causes leaks at a fake roof dormer?  

What causes bubble-like blisters in a built-up and gravel roof?  

• Why are there leaves in my attic? 

What is the most common type of roof-to-wall attachment?

Why does it cost so much more to replace a steep roof than a low slope roof? 

Is an attic required to have a light by the building code? 

• What are warning signs I need a new roof?

How can I inspect my roof for hurricane damage?

Why is premature curl of roof shingles a problem?

Can I put a new asphalt shingle roof over an existing shingle roof on a manufactured/mobile home?  

What is the average life expectancy of an SPF roof?

What is an SPF roof?

How can I tell if a roof has more than one layer of shingles? 

How do I safely remove a dead rodent (rat, mouse or squirrel) from the attic?

What are the common problems with attic insulation? 

How do I safely clean up rodent (rat, mouse or squirrel) urine or droppings the attic?

What is the life expectancy of an asbestos cement shingle roof? 

What is a roofing boot?

What's the average lifespan of a roof?

What is a "square" of roofing? 

What are roofing purlins and battens?

Why is it a mistake to replace a roof and not replace its flashings? 

Why is there no attic access hatch in the house?

What is the difference between roll roofing and modified bitumen? 

What is the minimum slope for a clay or concrete tile roof?

What is the building code requirement for an attic access hatch, scuttle, or door?

 What is the purpose of the gravel on a flat tar roof? 

Why is vermiculite attic insulation a problem for both buyers and sellers of a home? 

Does a roof with multiple layers of shingles last longer?

What can I do to prevent roof leaks?

What are the code requirements for NM-cable (nonmetallic-sheathed cable or Romex®) in an attic? 

Are roof trusses better than roof rafters (stick framing)? 

Why is a popped nail in a shingle roof a problem? How do I fix it?

What is the difference between roofing felt and synthetic underlayment? 

What are the most common problems with wood roof trusses? 

What causes a lump or dip in the roof? 

If my roof is not leaking, why does it need to be replaced?

Is a ridge board/beam required for a roof framed with rafters?  

What is an H-clip?

Does it cost more to roof a hip roof than a gable roof? 

What is the difference between galvanized and galvalume metal roofing?

What is the difference between plywood and OSB? 

How can I be sure my roofing contractor got a permit?

How many layers of roofing are allowed on a home? 

What are the dark lines running parallel to shingles on my roof?

Can metal roofing be used on a low slope/pitch roof? 

What are the roof sheathing requirements for a roof replacement in Florida?

How can I make my roof last longer?  

What causes a sagging roof ridge line? 

What is a "cool roof”?

What is a TPO roof? 

What are the warning signs of a dangerous attic pull-down ladder?

How can I find out the age of a roof? 

Does a gravel roof need maintenance?

What is the average lifespan of a concrete tile roof?  

Should I buy a house that needs a new roof?

Should I buy a house with an old roof? 

What is the average lifespan of a built-up and gravel roof?

What is the average lifespan of a modified bitumen roof? 

What is the average lifespan of a metal (galvalume) roof?

What is the average lifespan of an architectural (dimensional) shingle roof? 

What are those metal boxes on the roof?

What is the average lifespan of a regular (3-tab) shingle roof?

What is roof flashing? 

What does "lack of tab adhesion" in an asphalt shingle roof mean?

What is the minimum pitch/slope for a metal roof? 

Why do roof edges start leaking?

Why do my dormer windows leak? 

What is the minimum pitch/slope of an asphalt shingle roof?

What is the average life expectancy of a TPO (Thermoplastic PolyOlefin) roof? 

Do home inspectors go on the roof? Do they get in the attic?

Should I put gutters on the house? 

What's the difference between a roof inspection and a roofing estimate?

What is roof pitch? 

What is a collar tie?

How much of a roof truss can I cut out to make a storage platform in the attic? 

What is the stuff you paint an old mobile home metal roof with to extend its life? 

What is a roof cricket?

What's the difference between an "architectural" and a regular shingle roof? 

What is an EPDM roof?

 I'm buying a '50s modern house with a "gravel" roof. Is the roof going to be a problem? 

The inspector says that a missing kickout flashing caused water damage inside the wall. What's "kickout flashing"? 

How does a home inspector find roof leaks? What about wet spots in the walls?

What does a home inspector look for when examining a roof? 

Do stains on the ceiling mean the roof is leaking?

How can I tell if the house needs a new roof?  

 Why does my homeowner's insurance want a roof inspection?

What are the hazards to avoid when going into an attic? 

• What is a roof certification letter/report? 

• When was a fire separation in the attic first required between sides of a duplex? 

• Why is my roof leaking?

How do you flash skylight, chimney, and pipe vent roof penetrations on a metal roof?

• What is the maximum span allowed for ridge boards? 

 Is a house required to have an attic?

• Are soffit/eave vents required by code for attic ventilation? 

Why is insulation not allowed to touch around a gas flue in the attic even if it’s not flammable?

• Which are better: lead or rubber roof vent pipe flashing boots? 

How can I tell if an asphalt shingle roof manufacturer's warranty rating is 20 years, 30 years, or more? 

What causes a shingle roof to deteriorate faster and fail prematurely?

What would cause a home inspector and roofing contractor to disagree on the remaining life left in a roof?

What would cause a new asphalt shingle roof to have loose tab adhesion (sealant strips)?  

• Is it alright for a gutter downspout from an upper roof to empty onto a lower roof? 

Does the seller have to pay for a new roof?

• Can I install a new metal roof over an asphalt shingle roof? 

When is a cricket or saddle required on a roof? 

 What is truss uplift? 

What is the code required minimum pitch/slope for a metal roof? 

What is the minimum slope of a flat roof?  

• Why is a roofer's estimate of the square feet of roof area so much higher than the square feet of a house? 

• Should roofing nails be visible sticking into the attic? 

Why is there diagonal bracing at the roof rafters in the attic? 

• Are wood roof trusses with plywood gusset plates alright for house construction? 

What are the rules for cutting, notching, or boring holes in an engineered wood truss? 

Can I remove the interior walls under a roof truss? 

What is the minimum size for attic access opening? 

What is the average life expectancy of roof sheathing? 

• Is a hip roof stronger than a gable roof? 

• Do you need a permit to repair a roof in Florida?

Can I replace my own roof in Florida? 

What is a cool roof made of? 

• Are kickout flashings required by code?

What is an FBC roof covering? 

• What is the difference between a collar tie and rafter tie? 

What is the average life expectancy of roof flashings? 

What is the average life expectancy of pipe boot flashings?

What is the average life expectancy of rain gutters? 

Why are most house roofs slanted instead of flat? 

• How much can you notch a roof rafter for the seat and heel cuts at bearing? 

• Is it legal to bore holes through roof trusses to install wiring? 

• When did Florida start requiring re-nailing of roof deck sheathing for a roof replacement? 

• When were staples banned for roof sheathing attachment in Florida? 

When did the Florida code start requiring roof sheathing nails to be ring-shank instead of smooth? 

 Is it normal for a new shingle roof to lose granules? 

• Why is my metal roof leaking?

Do flat roofs always leak? 

• How loud does the noise get while installing a new roof? 

Is a house required to have an eave overhang by code? 

• How far should a metal roof overhang the drip edge? 

• What things can void a shingle roof warranty? 

• How do I minimize roof penetrations? 

What is the difference between plywood and OSB? 

 What are the signs my flat roof needs to be replaced? 

• Can water run uphill on a roof? 

• How long does fiberglass attic insulation last? 

• What is a dead valley at a roof? 

• What is the difference between plywood and OSB?

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