Table of Contents
How much should asphalt shingles overlap?
Overlap each row at least 3 to 4 inches. If you live in an area with inclement weather, you should consider using a special leak barrier protector. Then, install new flashing (metal flashing is often called “drip edge” along the bottom of the roof near your gutters) and starter shingles at the edges.
Do I need underlayment for asphalt shingles?
Technically, no, underlayment isn’t 100% necessary underneath asphalt shingles. Building codes vary from one region to the next, and most all building codes require felt or synthetic roofing underlayment.
How many nails do you need for shingles?
General Guidelines for Nailing Shingles Install the recommended number of nails per shingle. For Duration® Series shingles, Owens Corning recommends using either a 4- or 6-nail fastening pattern depending on the roof’s slope and building code requirements. In most cases, 4 nails are adequate.
How do you keep shingles straight?
Keeping the Roofing Line Straight e shingles aligned vertically and horizontally. A chalk line can keep your line straight over long distances and large areas. A chalk line can help eliminate short exposures, waviness and additional antithetical issues.
How far should shingles overhang the rake?
The edge of the shingles should hang over a roof between an inch and an inch and a half — or between a half inch and three-quarters of an inch if drip edge flashing is installed. Too much overhang and the shingles could blow off in high winds; too little can allow water to seep into rake or fascia boards.
How far should shingles hang over the 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.
Do shingles go over or under flashing?
Flashing should overlap the roof-covering material, but on asphalt shingle roofs, for aesthetic reasons, the part of the headwall flashing that extends down over asphalt shingles is often covered with a course of shingle tabs.
What goes under shingles on a roof?
What Is Roofing Underlayment? Roofing underlayment is what lies between the shingles and the roof sheathing, or roof deck, which is typically either plywood or OSB. It’s installed directly on the roof deck and provides a secondary layer of protection from the elements, including rain, snow, and wind.
Why do you need felt under shingles?
Roofing felt or felt paper, also called underlayment or roofing tar paper, goes between the roof deck and the shingles, which adds another layer of protection to your roof. It serves as a water repellent when heavy rain and storms can cause moisture to get trapped between the shingle and wood of your roof decking.
What do you put under asphalt shingles?
What is roofing felt paper? Sometimes called roofing felt underlayment, roofing tar paper, or roll roofing, this is a layer of protection installed between the roof deck and the roofing shingles.
Is it better to hand nail shingles?
While air gun nailing might seem faster, a well-trained hand nailer can do it almost as fast. The key difference between the two is accuracy. Hand driving nails into shingles allows for the roofer to place the nail on the proper nail line and then drive the nail in.
How do you shingle a roof that isn’t a square?
Start at one edge of the roof and install the first row of cedar or asphalt shingles. The lower edges of the shingles align with the lower edge of the roof. Install cedar shingles with two, 5-penny galvanized box nails. Place each 1 inch from the corresponding edges.
Are you supposed to remove the plastic strip on the back of shingles?
The GAF shingle application instructions for our entire product line specifically state that that film does not need to be removed. Note: The film strips on the back of each shingle are to prevent sticking together of the shingles while in the bundle. Their removal is NOT required during application.
Does fascia go on before shingles?
Fascia and soffit are installed after the roof installation is finished. It is ideal that soffit and fascia materials be installed before you place tiles or any other type of roofing material on the roof.
Do you use starter shingles on the rake?
A starter shingle is used to seal with the field shingle at the first course along the eave and rake. This helps prevent wind and water from getting beneath the shingle in this critical location. Starter shingles are installed so they overhang the edge of the eaves slightly to allow for water runoff.
Can you install drip edge after shingles?
The drip edge is often replaced when new shingles are installed, but it can be replaced at any time. Asphalt roof shingles can become brittle in cold weather, so wait until a warm (but not hot) day to remove and replace eave stripping.
Does drip edge go under or on top of tar paper?
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.
Is a drip edge necessary?
The 2012 International Building Code (IBC) requires drip edges for that type of roof. Regardless of the kind of roof you have, we highly recommend installing drip edges. Keep in mind that improper installation of any roofing component can create gaps, rendering any waterproofing solution useless.
Is roof flashing necessary?
Roof flashing, usually made from metals like aluminum, copper, or steel, is flat and thin, and prevents water from getting under shingles. All of these areas leave shingles and underlayment vulnerable to water, so the flashing is necessary to prevent leaks.
