If the drip edge is along the eaves
Eaves
The eaves are the edges of the roof which overhang the face of a wall and, normally, project beyond the side of a building. The eaves form an overhang to throw water clear of the walls and may be highly decorated as part of an architectural style; such as the Chinese dougong bracket syst…
How to install drip edge properly?
To install drip edge properly, start on the eaves. Begin at the corner of an eave where it meets the next eave or a gable rake. Measure how far the top of the drip extends past the front face (usually 3/4″ or somewhere thereabouts), and allow the first piece to extend that far past the corner of the eave.
Why do you need drip edge?
You also need a drip edge because without one your roof can experience moisture damage. Water passes over the shingles and down towards the gutters. When it gets to the edge of the roof, there is a possibility of moisture getting between the fascia board and the gutters or even backing up onto the plywood surface of the roof.
Does tar paper go over drip edge?
Your local building code is the controlling authority about installing a drip edge on a roof. Absent a building code in your area, the accepted method is to put the tar paper under the drip edge on the rakes and over the drip edge on the eaves.
Should the shingles extend over the drip edge?
Yes. Shingles should not extend more than 3/4” (19 mm) past the drip edge. If shingles overhang the edge of the roof by more than 3/4” (19 mm), then they are not supported and may crack and break off. In addition, the wind resistance at the roof edge may be compromised.
Does felt paper go under or over drip edge?
Installing roof drip edge flashing properly The best way is to install the roof drip edge only along the eaves first, then place ice-and-water barrier (in the snowbelt) or felt paper (underlayment) over the drip edge. This lets any water that gets on the roof run down the underlayment and over the drip edge.
Should felt overhang drip edge?
Align the Felt The WSU should overhang the drip edge by 1/2 inch, so snap a line that is 35-1/2 inches above the drip edge.
Does ice and water Shield go under drip edge?
Ice and water protector needs to be installed directly onto the roof deck after you have placed the drip edge at the eave. (The drip edge will be installed over the ice and water protector and other underlayments at roof rake edges.)
Is felt needed under shingles?
Answer: Roofing felt is a layer of tar paper installed beneath the shingles to provide a backup waterproof membrane in case of leakage. Felt, otherwise known as underpayment, is required when asphalt shingles are installed as a first layer of roofing or when they are applied over wood shingles or a built-up roof.
Does roofing felt go over ice and water shield?
The quick answer is yes, roofing felt does get installed over ice and water shield. The answer to this question and many more questions can be found using the water principle. This is something I was taught when I was first learning how to roof.
Should shingles be flush with drip edge?
How Should Shingles Be Installed Over Drip Edge? Shingles should be installed over the drip edge a minimum of 3/8” (9 mm) at both the eave edge and the rake edge. If the drip edge extends… out from the rakes and eaves (typically called DL Style or D Type), the shingles may be installed flush with the drip edge.
Is ice and water shield better than felt?
It is a lot more efficient at preventing leaks and is thinner. Synthetics hold up better in the case of blow offs because they don't tear like felt paper can. While they don't seal the nails as ice and water shield does it is a superior underlayment when compared to traditional felt paper.
Should drip edge be tight to fascia?
A metal drip edge will help protect the sheathing under the roof, but if it's installed too closely to the fascia board, it can still cause water to be drawn into the fascia. The best installation method is to leave a gap between the drip edge and the fascia board, about the width of a finger.
How far should shingles overhang drip edge?
¼ to ¾-inchAsphalt shingles should overhang the exterior edge of the drip edge by ¼ to ¾-inch. Check local building code for drip edge requirements prior to the start of your roofing project.
Does roofing felt leak?
However, felt roofs are highly susceptible to damage and leaks.
Does roofing felt need underlay?
You can increase the lifespan of new shed felt by using a method that is also used to protect the roofs of other buildings and structures when they have a pitch of less than 20 degrees. To use this method, you will need to use an underlay, which will need to be put in place before you install the shed felt.
How long can 30 lb felt be exposed?
According to our contract, they are using one layer of 30lb ASTM roofing felt paper. So, the curling is a natural occurrence and doesn't necessarily mean issues? After 2 1/2 months of exposure standard #30 felt should be replaced.
How much should roof felt overhang?
Roll out Your Felt Position it at the front end, remembering to allow for a 50-75mm overhang. You should also have the end of your felt overhang at the eaves by at least 50mm or as long as it needs to be to cover the whole batten and allow water to drain away without coming into contact with the timber.
How much overhang should a tar paper have?
Tip. If your rolls of tar paper aren't long enough to cover the length of the roof, use more than one strip to make a line across. Overlap the seams by 5 inches, and alternate the seams as you move up the roof so they don't line up, similar to how you adjust seams when laying hardwood.
How far should drip edge be from fascia?
The best installation method is to leave a gap between the drip edge and the fascia board, about the width of a finger. The shingles should also overhang the drip edge 3⁄8 to 1/2 an inch.
What is the overlap for roof felt?
Roofing felt is required to overlap 2 inches over the lower felt course. The overlapping felt creates a secondary barrier for moisture and wicks water away from the shingles above and the sheathing below. Therefore, a 2-inch overlap provides redundancy at the edges where the barrier is weakest.
Where do you install drip edge in relation to underfelt paper?
Where do you install drip edge in relation to the underfelt paper? If the drip edge is along the eaves of the roof, it goes underneath the felt underlayment. When the drip edge is along the rake edges, it is placed over the felt paper underlayment. If you are not a professional, do not fret, as it isn’t too hard to grasp.
What happens if you put water under a drip edge?
Over time some water may work its way under the drip edge and get onto the wood underneath. This will cause your roof to start rotting, so be sure to place the drip edge underneath the felt paper on the eaves of the roof.
Why do gutters need drip edge?
When a home has gutters, it helps direct water from the roof into the gutters. Drip edge helps to protect the roof from forming leaks over time by protecting the roof from wind and water exposure. The extended protection that drip edge provides to your roof means fewer repairs and a longer life for your roof.
What happens if you don't have a drip edge on a rake?
Without the drip edge on the rake edge, the underlayment and wood decking would be exposed to the elements. On top of rotting, this exposure will also cause your roof to leak.
What does the drip edge on a roof do?
By doing this, the drip edge will protect the would-be exposed side of the roof from windblown rain.
What is a 90 degree drip edge?
Standard 90 Degree Drip Edge. This is also referred to as Type C or L-Style Drip Edge. As the name suggests, this is the common type of drip edge and is in an L-shape at a 90-degree angle. This works perfectly for most standard roofing jobs. It is also the most affordable type and works great with gutters. This type of drip edge costs, on average, about $0.49 – $0.79 per foot.
Why is drip edge important?
Drip edge plays an important in extending the life of your roof. This includes: Keeps rain from blowing into the wood decking, which will cause rotting over time. Sends water that is running off the roof away from the fascia board and away from the building.
Where should drip edge be placed on roofing felt?
One source (Ask This Old House), states that a drip edge should be placed above roofing felt: https://youtu.be/dms-qDIUnUQ?t=11m31s
Where does the drip edge go on a roof?
It depends on where the drip edge is. At the side, or gabels, of a roof, the drip edge goes over the roofing felt . At the bottom of the roof, the drip edge goes under the roofing felt. I have no idea why Ask This Old House did the drip edge the way they did. The main purpose of underlayment is to keep water away from the decking if it gets ...
