Reroof Over Existing Flat Roof

This article discusses how to prepare an existing asphalt shingle roof for a roof over or for re roofing with new asphalt shingles.

Reroof over existing flat roof.

Roofing over an existing roof is also called reroofing or an overlay. Installing a new roof over an existing one also called a layover or nailover is often possible although not always the best option. If your roof is in good shape but has some damage to one side from a downed tree or has lost shingles in a wind storm an overlay is worth considering. Add a new layer of shingles which means that there is no tearing off of the old roof.

Reroofing is the process of layering one set of new shingles over a set of existing shingles. Beveled wood pieces called horsefeathers must be laid along the thick edges of the shakes to make a fairly flat surface. It can only be done once so if you already have two layers of roofing in place reroofing is not an option for you. There are a few situations where roofing over an existing roof just isn t possible.

This article series discusses best practices in the selection and installation of residential roofing. All shingle manufacturers honor the warranty whether their products are used for a reroof or a new roof. For now here are the most common reasons it might not be an option. It is the process where roofers install a new roof over your existing one i e.

Asphalt shingles can be laid over cedar shakes or shingles however this is a roofing project best left to pros. Transmits roof loads directly to the building s structure and does not rely on the existing roof system s for support. The only way to know for sure whether it will work for you is to ask a professional roofer. Nailing new shingles over existing ones is less expensive and faster requiring less labor but it also means you lose the chance to assess the sheathing for signs of water damage.

In this video i take show how to proper recover an old roof and make it look like it s a single layer check it out you might find useful tips for your new. We re happy to give you a free inspection. We also discuss proper asphalt shingle roof preparation for a roofover job. Before you reshingle a roof read our step by step guide for adding new shingles over old ones.

Asphalt roof shingle re roofing advice. Difference between reroofing and roof replacement. Also the application of a new roof coating over an existing spray polyurethane foam spf roof system is permitted without removal of the existing spf roof system and any under lying roof system. How to install a roof over an existing roof.