Laying Shingles On A Wet Roof

Before you reshingle a roof read our step by step guide for adding new shingles over old ones.

Laying shingles on a wet roof.

Installing roofing shingles on top of a wet roof can make your new roofing materials slip off and become damaged. This will help determine how the shingles will lay on the roof width. Beveled wood pieces called horsefeathers must be laid along the thick edges of the shakes to make a fairly flat surface. Roofing felt that has gotten wet can be covered with shingles as long as it is allowed to dry out first the surface underneath did not get wet and it did not wrinkle bubble or rip.

Ask this old house general contractor tom silva reveals the best ways to secure shingles to a roof. The nrca national roofing contractors and manufacturers association roofing manuals construction specifications institute standard federal construction standards from various agencies and internationresidential building code used by most states all prohibit placing either the water barrier membrane or shingles over wet substrate. If your roof s width is not an even multiple of the shingle s length you will have a partial piece on one end of each row. Shingles can slip off.

A wet installation can also cause a new roof to fail. If the sheathing or wood is wet during the time of installation it can trap moisture inside of your roof leading to mold rot or other severe. Shingles may not properly adhere to wet surfaces. Roofing felt applied over a wet roof deck or shingles applied over wet roofing felt traps a layer of moisture within the roof.

This moisture can lead to mold and mildew forming underneath the shingles. See below for a shopping list tools and steps subscr. We are currently installing new asphalt shingles on our back roof and it has been raining when the installers put the new shingles on top of the wet. Shingles and roofing materials may not adhere properly to slick surfaces with high humidity.

The bottom row of shingles must hang past the edge of the roof. Asphalt shingles can be laid over cedar shakes or shingles however this is a roofing project best left to pros. Continue laying your shingles horizontally up the roof. Aside from limited visibility especially during heavy rain the roof slope wet and slippery surface and the oncoming rain will heighten the chances of someone slipping and falling.

Most asphalt shingles are 3 feet 91 4 centimeters in length. When you reach the peak either bring the ridge edges together with a ridge capping layer or cut regular shingles into 3 tabbed equal pieces and bend them so they fit on the roof peak.