How To Lay Down Certain Landmark Shingles In A Valley?

This installation video discusses the application of CertainTeed’s Landmark shingle product, including five courses and alternate closed cut valley and skylight flashing methods. The video provides instructions for installing Landmark shingles, which have the NailTrak® feature, which provides 11⁄2″ of space. The video also discusses the application of CertainTeed-recommended flashing installation methods and ways to apply shingles at the valleys.

Closed-cut valleys are preferred by CertainTeed when applying Landmark shingles, while open valleys are acceptable for Landmark TL. To shingle out of the valley with laminated shingles, lay a shingle down as a gauge and mark the corner at the bottom and top of the roof. After snapping the guide line between marks, install the shingles.

The video also discusses the use of CertainTeed WinterGuard® for low slope decks. It emphasizes the balance of artistry, performance, and sustainability in CertainTeed shingles. The video also explains that shingles should be laid on smaller roof areas, across valleys, and onto adjoining roof areas at least 12″ (305 mm) wide. When reaching the valley, lay the shingles over the valley and trim the edges to the chalk line.

For step flashing against a vertical sidewall, place the first flashing piece over the end of the starter strip and position the valley liner before shingles. More detailed installation instructions can be found on product packaging and in the CertainTeed Shingle.

How do you install shingles in a valley?

The valley, where the roof planes intersect, is highly vulnerable to water penetration. To protect against this, IKO recommends open metal valleys for optimal roof performance. Center a 36-inch wide strip of ice and water protector membrane in the valley and temporarily tack it in place with nails along one edge. Carefully peel away the backing, position the membrane, and smooth out wrinkles. Work your way up the roof, installing additional pieces to overlap by at least 6 inches.

Remove the temporary nails and use a minimum 28-gauge pre-finished galvanized metal or similar non-standing material as flashings. Center the metal flashings in the valley, nailing at the edges only, and use asphalt plastic cement under each section of overlap. Snap two chalk lines the full length of the valley, 6 inches apart at the top, 3 inches on each side of the valley’s center line, and increasing in width 1/8 inch per foot toward the bottom. Apply the shingles over the valley flashing, trim the ends to the chalk line, and nail them at least 2 inches back from the chalk line.

How to shingle in California valley?

A California valley is a faster method for installing shingles, as it allows for faster export. To do this, ensure the valley metal is straight before nailing it, and snap a line on each side of the ridge top to bottom. If working in other states like Los Angeles, add a bead of roofing cement along the edge of the valley metal to bed shingles into. Align the bottom of a shingle along the chalk line, bed it into the roofing cement, and nail it to the roof deck. Place the nails along the edge of the valley metal, not into it.

Run shingles into the valley and cut them square from where the bottom corner intersects with the shingles nailed along the valley line. One nail goes into the top section of the shingle, covering the valley metal, while the rest go in the nailing strip. This method is similar to Mike Guertin’s Long Island Valley, which runs shingles from the first slope past the valley and up the second slope. Shingles are then bedded in cement going up the valley, and the edges are finished in a similar fashion to Garcia’s method.

How much gap between shingles and drip edge?

Roof shingles should extend over the drip edge, ideally a finger’s width or 3/8 to 1/2 inch, to direct water into the gutter system. Without an overhang, water can draw back under the shingles and into the roof decking, causing damage over time. Incorrect fastening, spacing nails 8-10 inches apart, and not overlapping at joints are common mistakes. Proper spacing ensures the drip edge is secure and prevents water from seeping through the pieces, ensuring a continuous water barrier around the roof.

What happens if you don’t put a drip edge on a roof?

A drip edge is a metal flashing installed at the edges of your roof, such as rakes and eaves, to prevent water from getting underneath your roofing components. Without a drip edge, water can damage the fascia board and roof decking, leading to structural damage and water infiltration. Pre-bent aluminum fascia and rake molding can also serve as drip edges in certain cases. If your home has either type, you don’t need a drip edge, as there’s already protection on the roof edges.

What is the best roof valley method?

The IKO recommends open metal valleys for best roof performance, as they are the most suitable for steep roofs from 6:12 and up. Closed-Cut roof valleys are not recommended due to their poor performance. California roof valleys are best suited for steep roofs, but may not meet building codes in some areas. Roof valleys are spots where two roof surfaces meet, with each plane having a layer of shingles that needs to smoothly intersect at the valley. Over the years, various methods have been developed to install and merge these two roof planes together. It is essential to keep your roof valley in good condition to ensure optimal performance.

Which is better open valley or closed valley?

California valleys and woven valleys can limit the life span of your roof valley and potentially void your limited warranty. IKO’s roofing experts recommend open metal valleys for better performance, offering better resistance to water penetration and faster debris, snow, and ice removal than closed valley roofs. To ensure the longest life and best performance, IKO’s Roofing 101 guides provide straightforward explanations of roofing basics, helping you understand how your roof should look and function.

How do you lay felt on a sloping roof?

Before installing shed felt on a roof, follow the manufacturer’s instructions and start at the bottom edge of a sloped roof to ensure rainwater runs over the top of the overlaps. Hammer nails through the top edge of the felt at 10cm intervals, starting at the center of the felt. Secure side panels and apply adhesive to the ridge before applying shed felt. Hammer nails into the lower edge of the top section at 5cm intervals. Install shed felt to the roof corners, using a paintbrush to apply adhesive and hammer nails at 5cm intervals. If someone is helping, fold the felt down at each corner to avoid slipping.

Does roofing felt go over the ridge?

The application of felt should be undertaken at the ridge or at a point four inches below it, with an overlap of more than four inches. It is imperative that the material be applied in such a way that it overlaps by a minimum of eight inches on each side, thereby eliminating any creases or bubbles that may have formed. At the juncture of the roof and the wall, affix the felt material by lapping it up by a distance of four inches.

Thereafter, the felt should be slipped under the siding. In the event that it is necessary to do so, the siding should be temporarily removed and replaced after the underlayment, shingles, and flashing have been installed.

Are closed valleys preferred when installing landmark shingles?

It is recommended by CertainTeed that closed-cut valleys be used for the application of Landmark Series shingles. However, open and woven valleys are also deemed acceptable. It is recommended that DiamondDeck® or RoofRunner™ Synthetic Underlayment be used for roofs with standard or steady slopes.

How to install roofing felt in a valley?

It is recommended that the installation proceed in manageable sections, with the underlayment being pressed firmly towards the outer edges in order to achieve a secure seal. The aforementioned steps should be repeated on the opposite side of the underlayment.

Do CertainTeed shingles require drip edge?

It is recommended that a corrosion-resistant drip edge be applied along the rakes and eaves of existing shingle roofing materials to protect the edges from corrosion.