How To Do A Roofing Layover

Therefore if your roof already has two layers of shingles layered separately you cannot have a layover done on top of it.

How to do a roofing layover. It s a good idea to use at least 40 year shingles. Since you do not tear off old roofing shingles a layover can be done much faster and it is supposed to be a cheaper alternative to complete roof replacement. Layover may be a good. Install a course along the snapped line then install succeeding courses using a guide or a snapped line.

Installing a new roof over an existing one also called a layover or nailover is often possible although not always the best option a properly installed layover roof can look and function as well. The thicker the new shingle the better it will hide any imperfections in the roofing below. Roofing is one of the most visible parts of a house and people seem to think that if the seller chintzed out on the roof job what else is wrong with the place that i can t see. A roof can only have one layover done.

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. Choosing shingles for a layover job. Used to be the headlap color was the same as the shingle but everything out there now uses whatever for the headlap color. If you do nest the layover just watch that the previous contractor pulled the rows in places to straighten out the roof.

Architectural shingles are an even better choice. Because of the extra weight caused by two layers of shingles only one overlay can be done on a roof. Plus a layover voids the warranty although many building codes allow one layover a layover job will not last nearly as long as a tear off and most people know that. How to shingle over existing shingles and how to shingle a roof how to install roof shingles shingle layout lines h.