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We are in process of instaling 29 guage steel tiles The 1x2 boards put down over 30lb paper should they be treated lumber? Second question Must the screws be stainless steel or can other type be used? Thanking you in advance for your prompt answer
Guest User

2/3/2006
First and foremost you need to consult with the roofing manufacturer and local building codes to get answers to these questions. That said, I do not feel the boards should be treated lumber as chemicals in treated lumber could react badly with the roofing. As far as the crews, there are many quality painted screws made for through-fastened metal roofing. However, as with most things in life, it is generally safe to say that you get what you pay for. Todd Miller
Todd Miller
Isaiah Industries, Inc.

2/4/2006
Would you please tell me if MBCI 5-V crimp 26 gauge mill finished Galvalume metal roof fastened with 1 1/2" ZAC-head woodgrip screws is a better roof than asphalt shingle for a home in the Keys.
Guest User

2/6/2006
Hi Barbara, Please understand ... this website is owned by the Metal Roofing Alliance -- a coalition of metal roofing industry members joined together for the purpose of promoting metal roofing. As a result, we do believe in it and its benefits over standard shingles. For your area, metal roofing can offer wind resistance, fire resistance, energy efficiency and durability. Feel free, though, to explore the full range of available products! Todd Miller
Todd Miller
Isaiah Industries, Inc.

2/6/2006
I am inclined to select a metal roof and certainly I appreciate the bias. So having said that would you then comment on the type of metal roof that has been proposed to me by a local roofing company? MBCI 5-V crimp 26 gauge mill finished Galvalume metal roof fastened with 1 1/2" ZAC-head woodgrip screws. What makes a metal roof wavey?
Guest User

2/7/2006
Oilcanning (waviness) is a phenomena which can happen with standing seam roofing where you have wide areas of flat metal. The waviness can occir because of stress inherent to the metal, improper forming, improper handling/damage, improper installation, or the condition of the building it is on. Or a combination of these things. 5V crimp generally has enough corrugation that this doesn't happen with it. The same goes for the shingle and shake style products. 5V Crimp is on the lower end of metal roofing because of its exposed fasteners and lack of a side seam. 26 gauge, though, is a better 5V Crimp. Generally, you could expect better performance out of a painted product. I hope this helps. Todd Miller
Todd Miller
Isaiah Industries, Inc.

2/8/2006
Todd wrote: 5V Crimp is on the lower end of metal roofing because of its exposed fasteners and lack of a side seam. So would that mean a 6V Crimp or 7V Crimp have recessed fasteners and side seams? Or is there no such animal. Are painted panels everything else that in not milled finished? Like white for example.
Guest User

2/8/2006
5V Crimp is a profile of its own. No, there is not a 6V or 7V. Galvalume mill finish usually has a clear coat on it. When you get into painted products, there are many grades of paint finishes. Usually, from "good to best," polyester, acrylic, siliconized polyester, urethane, and PVDF. The PVDF coatings have fade and chalk warranties. Todd Miller
Todd Miller
Isaiah Industries, Inc.

2/9/2006
Thank you so much for answering my questions. I do have one more to throw your way, here it comes. On our proposal from the roofing company it is listed to install 30# ASTM 4" lapped felt dry in , also a moisture barrier. They are suggesting (options) to install a secondary waterproofing system(Grace Ice & Water Shield)in leiu of 30# ASTM felt. Why? Which color have you found to fade the least? I do like Green.
Guest User

2/11/2006
Using ice and watershield on the entire roof would be unusual but it is a good underlayment. Typically, it would be done if the roof is real low pitch. Ice and watershield is not at all breathable so, if anything, it increases the need for attic ventilation. One option is to use ice and watersheild over the eaves and gables only. You should make sure that the roofing manufacturer does not suggest a slip sheet between the roofing and an asphaltic underlayment suchj as 30 pound felt. Very "rich" colors such as reds, blues and purples can be the toughest to hold color in. Again, though, the bigger factor in fade and chalk resistance is the paint chemistry, including the type of resin and the type of pigments, not the color. My earlier post listed paint systems by generally recognized quality ... the higher the quality, typically the more fade and chalk resistant it will be. Todd Miller
Todd Miller
Isaiah Industries, Inc.

2/11/2006
Forgive me, I am new to this roof exploration but please help me understand. I am told that South FL building code requires a 30# felt then mod bit or peel n stick then roof (metal or tile). Is this correct. If so, then how do you get around the comments u just made? Thanks.
Guest User

3/9/2006
This is a requirement for concrete tile. Metal roofing is treated a little differant in the code as there are so many differant shapes, styles and applications to use a descriptive section in the code so we test each roof system for wind uplift and wind driven rain. The product report on the product you choose will indidicate how the roof is to be installed, fastened and underlayment etc.
Allan Reid
Dura-Loc Roofing Systems, Inc.

3/9/2006