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Hello nealtw, Based on a review from amazon "For wood, OSB, fiber cement board, plywood, sheetrock, plaster, fiberglass, MDF, and anything else the TCT hole cutters like the ones from Blue Boar are a better deal if you plan to cut more than one or two holes", it seems that the hold saw from...

Hello all, I have DEWALT 3/8 in. Variable Speed Reversing Mid-Handle Drill Kit with Keyless Chuck Model # DWD115K http://www.homedepot.com/p/DEWALT-3-8-in-Variable-Speed-Reversing-Mid-Handle-Drill-Kit-with-Keyless-Chuck-DWD115K/202818530 Now, I need to buy a 4" hold saw that is used with...

@bud16415, Thank you for this great tip. Since no one is concerned about the fire hazard and I will not wet the board:)

Hello all, One more question: Should I do anything to prevent possible fire hazzard? In other words, should I wet the prywood first before I start to use the hole saw? Thank you

Hello all, Thank you so much all great comments and helps. The roofer told me to do it as a DIY job rather than pays him to do for several hundreds and he is the only roofer who point this problem to me. Originally, he suggested that I should cut all the board out just as the bottom part done...

Hello, Thank you for the quick response. Question> I don't quite understand how to check whether the prywood holds downward force or not. Can you give me some examples. I will post more images to illustrate the situation when I get a chance. Based on my initial observation, most of the bottom...

Hello all, Some sections of my attic have poor ventilation. One roofer suggested that I should install ridge vent on these sections and also cut through the prywood under the roof board in order to increase air floor to the roof board. Q1> Is it safe to cut those prywood which is directly...

Hello all, My attic has poor ventilation that is caused by poor building design. Some areas of the attic has no roof static vent and little air in-take. One of the suggestions is to install attic power fan and gable vent. Is there any scientific theoy that we have to pay attention when we...

Hello Sir, Thank you for your feedback. Originally, I also thought my house has roof leaks but here are some facts. We don't experience any leakage during heavy/storm rain fall. The only time we experience some dripping/water mark in the top floor ceiling is during the time when temperature...

Hello all, We found water condensation in the attic and the roofing company suggested that we should install an attic fan and said the ventilation of the house is not enough. The house is townhouse and with several vents on the roof. When the builder built the community, none of the houses have...