![]() ![]() ![]() You may also consider the use of steel or engineered wood as a sister rafter. ![]() ![]() You may need to sister the entire length, at which point you’ll need to figure out how to get a 16’ piece of wood – or longer – into your attic. Many varying circumstances may alter how you sister your rafter. Glue the new rafter flush against the existing rafter, then use 16d nails plus a carriage bolt every 16” to affix the sistered rafter. The length of the sistered rafter should extend at least 3’ past the problem area on the existing rafter, on both sides. To sister roof rafters, you should use the same sized lumber as the rafter. Our solution was to install new rafters next to the old ones, but at the time we weren’t quite sure how to sister roof rafters. When we went up to the attic, it was clear some of the rafters were in rough shape. It is advised to seek the local Building Department, Licensed Contractor and local Product Representative for proper installation requirements and code enforcement when installing a new roof.A while back, a relative of mine called me about a roof issue he was having – his roof was sagging and he thought he needed to fix some of his roof rafters. Our information is in general to our area and cannot be the same as your local town or state. has no controls over product failures, installation, or climate conditions that may change the roofing process in your area. does not accept any liability for the use of information on this website or email. It is the responsibility of the reader to check for accuracy in one's own jurisdiction, as there are different codes and restrictions for different parts of the country. All that is needed is to cut and install new frieze blocks making a professional-looking job and better than just chopping off six inches of rotten wood and scabbing on a block of wood at the end of the tail-like many DIYer's do.įind your local roofing contractor in the RoofersCoffeeShop® Contractor Directory.ĭisclaimer: The information provided on or information sent by emails is the opinion of the writers. You can see the newly painted rafters in the photo extends well into the attic area and is nailed with a six-inch staggered schedule. Most inspectors want to see a finished product to get a final sign off on the permit. I like to pre-cut, prime and paint all repairs on overhangs since painting on the ground is easier than on a ladder. Leaving the still functional old rafter allows the new board to be fastened to the old, keeping the same roof pitch. So here we have a 2-foot overhang and the new rafter tail will be cut at 2 foot plus 4 feet or a total of at least 6 feet. It is my custom to double the length of the overhang measurement for the new tail to be cut up into the attic area. As you can see here, one of my roofers has cut the tails back to the plate making sure the rafter is still supported but enough to remove the frieze block and dry rotten tails. It is very common not to have a fascia board in California and so the first thing to dry rot attacks is the rafter tails. This is a west coast style overhang without a soffit and fascia board which makes the dry rot repair a real simple fix for you DIYer's. I like to see the whole rafter tail removed from the plate to the gutter or fascia board. It is a whole lot easier if the roof is off to do these types of repairs. The best time to fix the dry rot on an eave or rafter tail is when doing a roof. Dry rot rafters are a common problem with homes.ĭry rot is caused by a lack of maintaining the paint on fascia boards, leaky gutters and problems with the roofing just to mention a few. ![]()
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