The more commonly used types of shingles for covering exterior shingles and asbestos-cement shingles. Either may be walls are wood shingles directly to the existing surface. If the old siding or cover and sheathing paper is removed, loose or defective engineering material boards should be renailed or replaced before new water- proof sheathing paper and shingles are applied.covering is not removed, the existing surface should be If the old covering as smooth, plumb, and true as possible.
All loose siding boards be securely nailed, and beveled wood strips of ap- or shingles thou y ‘ ‘ material proximately the same thickness as the butts of existing siding a solid bearing for the new shingles. The ends of applied to provide g s strips these should be lapped at the corners. The entire surface should be covered with new waterproof sheathing paper before laying the new shingles.
New staff molding will be necessary where the application of new shingles over old siding brings the finished wall surface out beyond existing window and door frames. Adequate flashing and drips should be provided over all window and door openings as well as suitable drips under window sills.
Damaged shingles may be removed by means of a nail ripper, which consists of a flat strip of steel with a cross slot in one end and an offset at the other. The blade is slipped under the broken shingle and the notch hooked around the nail; the offset end is struck until the nail is either cut or drawn out; the broken shingle is then removed and replaced.