Old Shigle Roof

Throughout this guide we ll discuss both.

Old shigle roof.

Lay a strip of felt at the bottom of the roof and move towards the top of the roof with each new strip. At best slimy black mold. Do this on both sides of the roof. Staple felt every 6 to 8 inches.

Nail drip edge flashing to lower edge of roof. Chances are your roof structure was designed for a dead load of one layer of shingles plus extra for snow and a safety margin. Lay strips of felt horizontally across the roof. Use a staple gun or hammer tacker to staple the felt to the roof.

What to do if the old roof is not straight if the existing roof has wavy horizontal lines you can take out the waves by snapping a horizontal line 1 2 inch below the shingle bottoms of one course. It generally takes three packs of shingles to cover 100 square feet 9 29 square meters. Ask this old house general contractor tom silva reveals the best ways to secure shingles to a roof. See below for a shopping list tools and steps subscr.

Install a course along the snapped line then install succeeding courses using a guide or a snapped line. Installing new roof shingles over old effectively doubles the weight of the roofing so you have to make sure your roof structure can handle the extra load. How to clean mold off a roof. It depends on local codes how your roof is built notably how many layers of roofing it already has and how pristine you want the new roof to look.

Cover roof deck with 30 pound felt underlayment. 3 tab roof shingles are one of the most commonly used shingle styles in north america. The main advantage of leaving the old roof on is obvious you can minimize the mess removal costs and disposal expense if you can leave the old shingles in place. It s easy to let a mold problem sneak up on you on in out of the way places like the roof of your home.

How to measure for roof shingles. To lay out the design for the shingles begin at the bottom of the roof and place a tape measure inch from the edge of the roof to ensure the shingles overhang the drip edge. Trim tabs off roof shingles to create starter course. Measure the width and length of each section of your roof.

Pry off old roof shingles with pitch fork. Multiply the width and length measurements together to determine the area. Measure your roof so you can be sure you buy the right amount of shingles. Let s start with some of the most common roof shingle styles.

Place staples 6 to 8 inches 15 2 to 20 3 cm apart in the. Snap vertical chalk line down center of roof. Nail down loose roof sheathing to rafters. When you hear the term asphalt shingles many times we are talking about standard 3 tab roofing shingles.