Installing Roof Valley Shingles

Once you ve done that cut your shingles to size if they re not already.

Installing roof valley shingles.

To install asphalt shingles start by installing underlayment and new flashing on the roof. Working your way up and across begin laying your courses. Nail the shingles 5 cm back from the chalk line. Then begin nailing the shingles to the roof working in rows and starting at the edge of the roof.

If necessary trim a part off the adjacent shingle in the course to allow a longer portion to be used. Install your roof shingles now that you ve conquered the underlayment and drip edge and plotted your course it s time to truly learn how to install roof shingles. Overlap each metal piece by at least 150 mm 6 and use asphalt plastic cement under each section of overlap. Ensure ice and water protector has been installed along the valley first.

Center a minimum 610 mm 24 wide minimum 28 gauge pre finished galvanized metal valley liner in the valley and fasten with only enough nails to hold it in place nailing at the edges only. Be mindful of the proper nailing technique so that your nails always hold the top edge of the course beneath it. Lay one and two tab shingles as you near the valley so full size shingles will run across the valley. To secure the roof valley flashing nail it down carefully.

Install an underlayment centered in the roof valley. Then install a non corrosive metal valley flashing of 24 minimum width lap successive sheets of metal flashing a minimum of 12 inches and seal laps. Glue the valley end of each shingle with bituminous mastic. Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles.

Stop nailing 6 inches from the center. Do not use a shingle trimmed to less than 25 cm in length to finish a course running into a valley. How to shingle a valley with architectural shingles. If you are looking to install shingles you might want to consider the closed cut valley method it is popular because the two roof planes do not need to be shingled at the same time.

Roof one side of the valley running the shingles across it. Apply an approximately 3 inch width of asphalt roofing cement along the sides of flashing and embed shingles in mastic.