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DL Exteriors installs roof ventilation 


Ventilation
 


 Roof System Installation and Tamko Shingles Hip and Ridge Shingles Roof Checklist
Ventilation Products Water Resistant Underlayment ♦ Roofing Glossary ♦ Why Your Roof is Deteriorating 

 Please feel free to contact us at 402.416.1310 or complete our Contact Us page. A DL Exteriors' representative will be more than happy to give you a free (no pressure) price quote.


The Importance of Ventilation
One of the most common misconceptions in the roofing industry is related to adequate ventilation of the attic space beneath the asphalt shingles. In order to allow each individual roof component and the asphalt shingles to perform adequately, it is critical to allow for proper attic ventilation.

Selecting a Ventilation System
There are many types of ventilation methods available in the marketplace today.  These systems vary from gable vents to electric turbines to under–the–shingle ridge ventilation systems.  Your search should consider the system that best ventilates a home in a cost-effective way (both in material and installation costs).  Other considerations may include validation of shingle manufacturer's warranties and meeting code requirements.

Why Ventilate?
In the summer, heat can build up in attic spaces to as much as 150°F.   Eventually this hot air can penetrate the home's living envelope, warming the area below.  A properly ventilated attic enables this extreme heat to escape outside
The result: a homeowner can save in air conditioning costs. 

In the winter, moisture from the "closed–up" house condenses in the attic,  Insulation gets wet and loses its effectiveness thus allowing valuable heat to escape through the attic.  Soaked insulation can stain or crumble ceilings.  A properly ventilated attic enables moisture to exhaust. 
 The result: insulation performance is maintained and heating costs are saved.

A primary reason to ventilate an attic is to preserve the structural integrity of the roof.  When heat and moisture accumulate and are left uncontrolled, they can cause significant damage to the roof structure and reduce the normal roof life expectancy.

Determining Ventilation Needs
Nine out of ten homes are improperly ventilated.  Even if the attic area is presently vented, it should be closely checked to determine whether or not the present ventilation system is adequate.

Signs of high moisture content in an attic include:
♦ Roof boards & rafters have signs of moisture.
♦ Damp insulation.
♦ Unnaturally dark or discolored boards.
♦ Dark streaks on roof boards around nails.
♦ Orange resin beads on rafters signaling sweating wood.

In drastic cases of dampness, soft and crumbling boards will be evident; structural repairs may be needed.  In less drastic situations, the problems may be solved simply by installing additional ventilation.

To determine your ventilation needs with either static or powered systems, it is necessary to calculate the square footage of your attic floor and relate that to the Net Free Area of your selected ventilation system.  Net Free Area is the approximate clear opening of the ventilator through which air may move.

the space ventilated should have a minimum Net Free Area of 1/50*.  This means that for each 150 square feet of attic floor space, one square foot of Net Free Area is required.
The ratio can be reduce to 1/300 if: there is a vapor barites installed in the attic over the living space, or there is a difference of at least three feet in height between the intake (under–eve vents) and the exhaust.  The total Net Free Areas of the intake must equal or exceed the Net Free Area of exhaust.

Please Click on image below to  view a full size diagram; use your browser's Back button to return to this page.

Roll Vent® is a self-contained ridge vent product on a roll. It's manufactured using a durable two-layer composite consisting of a nylon-polyester, non-woven, non-wicking fabric, heat bonded to a compression resistant, open nylon matting of three dimensional construction. Roll Vent® is capped using roofing shingles and requires no baffles, metal connectors, end caps, or special filters. Once installation is completed, Roll Vent® is completely hidden by shingles and requires no maintenance.

♦ Durable compression resistant Nylon-Polyester construction is lightweight, cannot be dented, and has no sharp edges.

♦ Flexible to conform to roof pitches between 3/12 to 12/12.

♦ Virtually invisible and maintenance free.

♦ Up to a 50 year limited warranty, depending on the warranty term of the new shingle installed.

♦ 18 sq. in. net free area (NFA) per linear foot. Maximum ventilation.
Certification: ICC-ES Report ESR-1059

 Please feel free to contact us at 402.416.1310 or complete our Contact Us page. A DL Exteriors' representative will be more than happy to give you a free (no pressure) price quote.

 Roof System Installation and Tamko Shingles Hip and Ridge Shingles Roof Checklist
Ventilation Products Water Resistant Underlayment ♦ Roofing Glossary ♦ Why Your Roof is Deteriorating 


DL Exteriors provides service in and around:
Lincoln, Omaha, Waverly, Ashland, Gretna, Elkhorn, Wahoo, Milford, Crete, Friend, Fremont, Council Bluffs, Bellevue, La Vista, Papillion and Memphis, Nebraska.


We provide FREE NO PRESSURE ESTIMATES . . . . . . . .  give us a call at 402.416.1310 or fill out the form on the Request an Estimate  page


info@dlexteriors.com
PO Box 21797, Lincoln, NE 68542
| Phone 402-416-1310

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