Leave Old Felt On Roof

If you re going to add a roof on top of an old one it s a good idea to remove any loose shingles and apply a new layer of 30 pound roofing felt before laying the new shingles.

Leave old felt on roof.

Hope all goes well. Lay down felt and secure to roof. Also you will need to remove any old felt on the roof as well as any nails or roof staples. The 20 30 40 50 yr designations on your shingle type only refers to the length of time ther manufacturer anticipates the shingle will resist the sunlight weather.

One disadvantage of traditional felt roofing underlayment is it generally can t be left exposed for more than a few hours. Call for free estimates from roofing pros now. When i do a roof as with a few other boys on here it is also in my contract that a complete strip down of all old roofing material down to the sheathing to ensure that my customer gets the best possible roof for their dollar meaning if there are any current or developing problems with the sheathing they are taken care of before they become a problem. The material may dry out or leach oils in the heat.

There are several disadvantages to using felt underlayment on a roof. The old felt should be stripped off and the boarding aswell so you have a clean service for rubber or you can primer for a fibreglass roof. The felt is the last line of defence. I know its tempting because sometimes the shingles come right up and leave the felt nicely intact.

Photo courtesy galow homes. It looks as if the installer of asphalt roof shingles still visible at below right but now worn out may have placed roofing felt on top of a still older wood shingle roof. When to use roof underlayment no matter what type of asphalt shingle you are using whether traditional or more robust styles such as under premium designer architectural and performance shingles it is recommended to use a underlayment. Sweep the roof clear of grit and dirt to avoid poking holes in the new felt.

This would impact the felt s ability to protect against moisture. Having a layer of roof felt will block the resin preventing it from staining or compromising your roof shingles. You must remove any rotted pieces of wood on the roof and replace them with your plywood planks. Find a pre screened local roofing contractor.

Above is a peel and stick mineral surfaced roofing underlayment shown during installation of a metal standing seam roof. But if the felt roof is done with good thickness high performance felt it should last a long time depending on when it was done. Use the hammer s claw and the stanley knife to rip away the bulk of the felt then the screwdriver and the claw to pull out the old clout nails. So if your contractor is not recovering your old roof with new felt you are not getting a reroof.