Table of ContentsPlywood-over-asphalt Shingles QuestionRoof Removal: How To Tear Off Roof ShinglesTearing Off Old Shingles Vs. Overlaying

Unless a metal valley flashing is utilized, the very first action is to line the existing valley with a new underlayment including either 90-pound roll roofing or a more long lasting modified bitumen membrane. Then install either a closed or woven valley as described above. See roofing system valley information at ASPHALT SHINGLE VALLEY FLASHING.

Atlas Roofing Corp. www. atlasroofing.com Fiberglass and natural felt shingles Certainteed Roofing www. certainteed.com Fiberglass shingles Elk Premium Structure Products www. elkcorp.com Fiberglass shingles GAF Materials Corp. www. gaf.com Fiberglass shingles Georgia-Pacific Corp. www. gp.com/build Fiberglass and natural felt shingles IKO www. iko.com Fiberglass and natural felt shingles Owens Corning www.

Tear Off Vs. Shingle Over

tamko.com Fiberglass and organic felt shingles Air Vent/A Gibraltar Business www. airvent.com A complete line of roof ventilation products, consisting of shingle-over and exposed-ridge vents with exterior wind baffles and internal weather filters. Likewise soffit and drip edge vents and passive and powered attic turbine-type vents. Benjamin Obdyke www. benjaminobdyke.com Shingle-over ridge vents.

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Extractor vent is formed polypropylene with internal and external baffles. Cor-A-Vent www. cor-a-vent. com Shingle-over low-profile ridge vents, consisting of Cor-a-vent, Fold-a-vent, and X-5 ridge vent, developed for extreme weather condition. Corrugated core. GAF Products Corp. www. gaf.com Cobra vent: roll-out shingle-over ridge vent with a polyester-matrix core 102 CHAPTER 2 Roof Mid-America Structure Products www.

Pros And Cons Of Adding A Second Layer Of Shingles

owenscorning.com VentSure corrugated polypropylene ridge vents; likewise passive roof vents and soffit vents Trimline Building Products www. trimline-products. com Shingle-over low-profile ridge vents, Flow-Thru battens for tile roofing systems Elk Premium Building Products www. elkcorp.com Highpoint polypropylene shingle-over ridge vents Tamko Roof Products www. tamko.com Shingle-over ridge matrixtype Roll Vent and Rapid Ridge (nail weapon variation) and Coolridge, which is formed polypropylene with external and internal baffles Benjamin Obdyke www.

Why You Shouldn't Reshingle Over Old Shingles

asphaltroofing.org Cedar Shake and Shingle Bureau www. cedarbureau.org Metal Roofing Alliance www. metalroofing.com Tile Roof Institute www. tileroofing.org This post includes excerpts or adaptations from Best Practices Guide to Residential Construction, by Steven Happiness, courtesy of Wiley & Sons. Also see the roofing article links noted at the SHORT ARTICLE INDEX the bottom of this post and our roof web page: ROOFING EXAMINATION & REPAIR.

Yeah that's a bear. IF there is not working space either the roof unit has to be lifted - which is dreadful as it'll be costly and need removing and replacing refrigerant (unless the installer left flexible line slack) -Or you 'd install an appropriate membrane under the unit and flash the upper end and sides at the roofing system how to re-roof under air-conditioning systems which are on top of roof Not if you're following the producer's installation recommendations.

com/roof/Roof _ Drip_Edge_Flashing_Specifications. phpOften I'll add (or a roofing contractor would add) a 2nd drip edge right atop the existing shingle layer prior to laying on the second shingle layer. Or you'll rely on the existing drip edge. The article I point out above provides information that help guarantee that the drip edge works effectively On re-roofing, I presently have drip flashing, do I require to re-install new drip flashing over old roof? Trying to find a source to buy some 5" starter strip for reroofing over shingles.

How Many Layers Of Roof Shingles Are Allowed & How Many

Thanks I have actually folded over shingles along the edge of my roof from the last roofing system repair I had done. They changed all comp shingles along the ridge and edges, no metal drip edge exists at all, and wind is blowing particles and rain into the folded shingle. Why would they do this? Is this correct? I can't discover anything online that speaks to why they would fold a shingle in half and after that nail it down along the edge, besides as a decorative edge. Simply check the flashing details - which I can't understand for your roofing. When you tear off the shingles and after that include 1/2" thick OSB roofing system sheathing followed by felt and asphalt shingles, the upper surface of the ended up roofing may be close enough to the initial level of the upper surface of the prior roof that no flashing amendments are required - eg at chimneys - or possibly not.

I need to replace my initial cedar shake roofing (3/4 inch split shakes), which is set up over wood battens. I prepare to replace the roofing with architectural asphalt shingles, and am dealing with several roofing contractors to get quotes. The roof specialists are providing me different opinions about whether I can attach OSB roofing system sheathing over the battens, or I need to eliminate the battens entirely and connect the OSB sheathing directly to the rafters.

A Guide To Roofing Over Existing Shingles

An extremely general number for re-roofing with asphalt shingles might be $100/square or about a dollar per square foot. BUT you can not utilize this number reliably. Roofing system replacement expenses differ widely by location of the U.S. along with by factors peculiar to the specific structure such as building height, roofing system slope (extremely high, can't walk-on, more expensive to re-roof), and the need for incidental repairs of roofing decking and flashing.

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Finally the cost to dispose of the torn-off shingles might differ widely by area too. So you will desire quotes from 2 or three regional roofers. Make certain to read bids carefully as there might be differences in what is included in the work. (Oct 12, 2011) Anonymous said: I don't understand where alot of these roof job bids are coming from but $100 isn't even realistic anymore.