Roofing question from a complete roof idiot!
cburch
16 years ago
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joed
16 years agocburch
16 years agoRelated Discussions
Mighty Anvil--Roof Question (Grace I&WS and Unvented Roof)
Comments (3)Thank you for your fast reply! About our climate: - Extreme. Daily temp swings ~50 degrees between day and night. - Summers, though short, are intense reaching 100, - Winters below zero--last year we hit -38, which was not seen here for some time prior. - Snowfall ~20" annually and commonly swing (especially at the beginning and end of the season) between snow accumulation and melt cycles. - Not like the Rocky Mountains of CO where feet of snow pile up, but last year there were some pretty threatening icicles hanging from rooftops. - Its basically high desert--trees only grow along creeks. - Windy. Not constant or as extreme as say southern Wyoming or coastal hurricane regions, but it is a factor. The second vent space *is* being considered for the reason you state: to create a cold roof--an insurance policy, but perhaps overkill. Also, we already have the BCIs and sheathing for the roof so that part we're committed to. No other part am I dead-set on and very much appreciate input. Started this thread to identify any wrong-thinking on our part and gather now that: - insulation above the roof sheathing keeps that sheathing in the warm space, preventing condensation, otherwise a vapor barrier is required. That vapor barrier could be spray foam on the underside of sheathing, right? - 2 layers of underlayment for the 3:12 pitch south side. Thank you very much!!...See MoreRoofing question...shallow pitch underlayment question.
Comments (22)You're over-thinking this detail. If the boards are level enough for modern fiberglass reinforced asphalt shingles they are certainly level enough for Ice & Water Shield underlayment. The major beneficial feature of this material is that it seals the roofing nail holes and seals to itself at the laps. How well it adheres elsewhere is a side benefit that will only matter if you are ever in a hurricane. How much wind uplift resistance do you think stapled double coverage felt underlayment provides? I have a sample of this stuff from the 70's and the two lapped pieces are still stuck together. If you ever put the two sticky sides together you will not be able to separate them without tearing the polyethylene sheets away from the asphalt layers and that is quite difficult to do. You can run this stuff vertically, lapped the wrong way, or forget to remove the backing paper and it will still perform better than any other underlayment. Use the real Ice & Water Shield or make sure any substitute is 40 mils thick with a smooth polyethylene top sheet. This is the same material as Vycor 40 but with a non-slip surface. You still want to be careful walking on it when wet....See MoreRoof coating over roll roofing on low pitch roof?
Comments (6)Here, you can find https://technonicol.in/ the most modern, technologically advanced, and up-to-date solutions for your tasks. After all, TECHNONICOL is a leading international manufacturer of roofing, waterproofing, thermal, and soundproofing materials. The company's product range includes polymer-bitumen waterproofing membranes (APP and SBS), self-adhesive sealing tape, building foils, roofing tiles, single-layer synthetic membranes (PVC and TPO), HDPE membranes with recesses, liquid bitumen waterproofing (primers and mastics. ), polyurethane foam, rock wool, XPS and PIR - everything you need for reliable waterproofing and thermal insulation from foundation to roof of any facility....See MoreQuestion(s) about Gerard Stone Coated Steel Roof Installation
Comments (2)Thanks! We'd been told all along that they need six days from start to finish. Tear-off of the old wood shake roof was on Sunday. Today they have started to install the Gerard panels. I'm guessing they'll be done tomorrow. Maybe we'd been told 6 days because they built in some extra time in case of unforeseen delays. At any rate, I'm very pleased with their work so far!...See Moreron6519
16 years agocburch
16 years agoMongoCT
16 years agoMongoCT
16 years agoMongoCT
16 years ago
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