How To Re Roof With Architectural Shingles

You can cut the layered edge of architectural roof shingles and use the cut flat piece as your starter roof single.

How to re roof with architectural shingles.

After that correctly positionthe first shingle and properly snap a line of chalk across the roof to mark the top layer of the shingles. After that you should tear off old shingles before installing a new layer. Use galvanized roofing nails long enough to fully penetrate the sheathing typically 1 1 2 inches for a second roof and 1 3 4 inches for a third. The standard practice is to limit to a total of two layers of shingles.

Instead of one layer laminated or architectural shingles have two or more layers with three dimensional tabs of varying sizes. While both types are made up of the same essential components re roofing over architectural shingle is a different case altogether. Re roofing with 3 tab shingles are pretty straight forward. Best solution is tearing off the old shingles first.

If you ve got a new roof on your mind there must be something noticeably wrong since these types of roofs come made to hold up for a lot longer than a 3 tab. Architectural shingles are durable less prone to curling and hide imperfections better. Nesting each new row below an existing one keeps the new nails 2 inches below the existing which will help minimize any splitting of the sheathing. Apply a cover of starter architectural shingles.

The professional answer is no you should not attempt to re roof architectural shingles over existing architectural shingles. Mark a chalk on subsequent roof layers upward. Architectural roofs should be able to and withstand more damage than 3 tab shingles. Apply the first real course of architectural shingles so that the tabs reach the lower edge of the starter course.