Why is a popped nail in a shingle roof a problem?

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

• What does "lack of tab adhesion" in an asphalt shingle roof mean? In most instances opposing rafters are installed, one on the left side of the structure, then the mating one on the right. To learn more about roofs and attics, see these other blog posts: • Why is my roof sheathing sagging between the trusses? Is it okay to combine soffit-to-ridge roof ventilation with gable-end vents? While the joists commonly attach to the side of a ridge beam, they can also sit on top of it, as shown in the diagram below, which creates an interesting look when the roof structure is exposed as part of the design. • Is an attic required to have a light by the building code? Helping You to Do It Yourself! The photo below shows a home where the structural triangles were disrupted by retrofitting a small shed dormer into the attic.

For safety, always wear fall-arresting equipment when working on a roof. • What causes shingles to buckle along a line on the roof? The electric fence does not need to be a complete loop to shock. If in this case, you choose to add ridge vents, you must either remove the gable vents or seal them up from inside the attic. How can I inspect my roof for hurricane damage? Also, construction methods and materials vary in different parts of the country and it is possible that important issues related to your area may not be covered here.

• Why is premature curl of roof shingles a problem? it runs down the wire to no where, The animal touches the wire, current flows into the animal, and back in the soil to the ground rods systems. It was made of twinned 1x4 cut to approximately 4 foot lengths. Are roof trusses better than roof rafters (stick framing)? • What are the hazards to avoid when going into an attic? Sealing and leaving them may look better from outside, to avoid creating a blank gable. In many large glulam or timber framing the rafter to rafter bearing is accomplished due to the falsework and temporary structures built to support the rafters during erection. Ridge boards shall be at least 1 inch nominal thickness and not less in … If my roof is not leaking, why does it need to be replaced? How can I be sure my roofing contractor got a permit? What causes roof shingles to curl up at corners? What are the dark lines running parallel to shingles on my roof? • How much of a roof truss can I cut out to make a storage platform in the attic? On a house with eaves and gable vents but no ridge vents, wind perpendicular to the ridge tends to create air flow along the floor of the attic but leave hot dead air in the roof peak (left). Why is my roof sheathing sagging between the trusses? (Trusses have rafters tied together with other structural elements and are installed as a single unit, while rafters are installed separately). Ridge board is usually upsized a couple inches in width to allow for the longer length of the plumb cut on the rafter. VerticalScope Inc., 111 Peter, Suite 901, Toronto, Ontario, M5V 2H1, Canada. The entire assembly acts as a whole, allowing the shifting of weight or forces to be equalized throughout the structure.

The use of a ridge board, eliminates the delicate balancing of a rafter to rafter install and reduces the potential for error or miscalculation. This article describes and illustrates the different types of support that prevents roof sagging and wall bulging at buildings, including definitions of collar ties, rafter ties, and structural ridge beams. A ridge board was not always required and the photo above, of the attic in a 1920s era house, shows a roof framed without one. • Why does my homeowner's insurance want a roof inspection?

• What causes leaks at a fake roof dormer? If in this case, you choose to add ridge vents, you must either remove the gable vents or seal them up from inside the attic. What Are The Cons? This aluminum cap is the finished product and does not require additional asphalt shingle ridge caps. This site is not an offical copy or maintitned by the Government of Ontario.

Can metal roofing be used on a low slope/pitch roof? What are the most common problems with wood roof trusses? • How many layers of roofing are allowed on a home? The rafters terminate against the ridge board unless the framing is designed to bear rafter against rafter with no ridge board.

The rafters would be made of 2x6 at a 6/12 pitch. Attach the other side of the vent to the opposite side of the ridge to fully secure the vent. What causes shingles to buckle along a line on the roof? What causes bubble-like blisters in a built-up and gravel roof? The electric fence charger sends out current to the electric fence wire about once a second to the wire. The string gives you a visual on whether or not your keeping it straight. I was planning on creating a 22' ridge board out of 2 pieces of 12' 2x10s but now am wondering if 22' is too long and could cause roof sag in the middle? How can I tell the age of a Lennox heat pump or air conditioner from the serial number? (b) the beam is supported at intervals not exceeding 1.2 m by not less than 38 mm by 89 mm members extending vertically from the ridge to suitable bearing. If I was framing that roof, I would run 2 x 6 ceiling joists all the way the length of the building. Rather than interrupting the roof line the way other raised vents do, a ridge vent is so low-profile that almost unnoticeable. Visit our ROOF AND ATTIC page for other related blog posts on this subject, or go to the INDEX for a complete listing of all our articles.

Remove all framing nails that are above or running through the chalk lines, using a cat's paw pry bar and a hammer. Start by removing the nails holding the ridge cap shingles in place. 2x6 rafters, 2x8 ridge, etc. The gussets are in between rafters. • Do stains on the ceiling mean the roof is leaking? • Why is it a mistake to replace a roof and not replace its flashings? I've seen typical ridge vents with NFVA as low as 9 sq in per ft of ridge and as high as about 18-20.

What Are The Cons? Q. I'm reroofing an older ranch house that has continuous soffit vent panels and gable-end attic vents but no ridge vents. A ridge beam is a structural element designed to hold up the roof, therefore a ridge beam is a typically large structural member, and it must be supported by posts on either end, sometimes with an additional post in the middle to reduce the required depth of the beam. • Why does it cost so much more to replace a steep roof than a low slope roof? If there is no ridge board present, as with some truss-framed roofs, the opening should be at least 1 inch from the ridge on both sides. Roof Framing: collar ties, rafter ties, tension beams & structural ridge beams: some of these can support the roof and prevent ridge sagging and wall spreading. • What causes roof shingles to curl up at corners? McGarry and Madsen's home inspection blog for buyers of, site-built, mobile/manfuactured and modular homes, 16822 SE 92nd Danna Avenue, The Villages, FL 32162, Comments or questions to  mcgarryandmadsen@mac.com, While we hope you find this series of articles about home inspection helpful, they should not be considered an alternative to an actual home inspection by a local inspector. This type of framing is a specially designed rafter layout and requires precise and experienced erection. • What are the most common problems with wood roof trusses?

The ridge board is accurately placed in position and rafters are installed sequentially down the ridge board.

It is best to create a minimum of 1 inch of clearance on either side of the ridge board (ridgepole) to allow airflow through the opening and into the vent. • Why is a popped nail in a shingle roof a problem? The case for using construction estimating software. The goal of a venting system is to remove heat and moisture from the attic. Is an attic required to have a light by the building code? The difference between them is that a ridge beam is a structural member that bears half of the live and dead loads of the rafters on either side of it, but a ridge board is not structural. For 16" centers on the rafters, you don't normally need plywood clips.

The next step is to cut the wood decking back along the ridge. In that case the load is on the ends that wants to push the walls apart and you need ceiling joists/ceiling collar/cables to keep the walls together. Why is there no attic access hatch in the house? What are the mistakes to avoid when doing attic improvements?

Because a ridge beam often carries a significant area of roof load, they can exhibit structural distress due to a defect in wood, impact on the roof, or use of an undersize beam. 5/8" cdx makes a solid roof. Ridge boards when used are normally installed by a temporary bracing system, prior to the rafter installation.