to properly install the screws in corrugated roofing do they go in the valleys or the ridges?

Answer 1

There is no one cut-and-dry answer here for this. Ive seen both, even from the same contractor.

In some cases, it is easier to install the screws in the valleys (particularly if there is a rather 'high' ridge, which could be damaged by over-torquing the screws).

ALL metal roofing screws should have the rubber washers under the screw heads, no matter if they are located in the valley, or on the ridge.

These screws should be checked annually as part of a yearly maintenance schedule! Make sure the rubber washer has not deteriorated, and that the screw is in as tight as it is supposed to be. Make sure that the trim pieces are attached properly, and, that any insulating, or sealing "fillers" are still where they are supposed to be.

Have Fun

Answer 2

Yes ridge vent is still recommended, you can get more soffit vent, aka under eave vent, but you need somewhere for that air to go. This is what the ridge vent is for to circulate that air. All answeres above are all right in a way. . . In a low slope roof ridge vent is still very affective. This is true as long as you have equal or greater venting in the soffits and never mix ridge vent and gable vents. If gable and ridge vents are mixed it can great a suction in the ridge vent and could and I mean slight very slight chance that water or debris can be "Sucked" down through the ridge vent. The ridge vent will not leak as long as there is any pitch at all, the angle that the rain would have to fall is impossible as long as the ridge vent is installed correctly and the actual opening of the roof the vent is installed over is not larger than recommended. Lets ponder this, the soffit vents are install along the outside base of the roof and ridge vent is along the top center. Natural circulation is that hot air will rise so the air will move from the soffit vents up the roof line and out through the ridge vent. This allows for much greater heat escape than a gable vent or even a power vent with much less effort. As long as there is ridge vent along the length of the house. The brand of ridgevent is a big thing as well, each brand lists the net free area of the vent. This is the calculated amount of space available for air to flow through. Industry average is about 18 square inches. The actual air that can flow through this can be drastically different. The best ridge vents out on the market today are, GAF brand Cobra Ridge Vent series and Headrick Building Products SONN brand. Each of these tests very well out shining the competition by a huge margin. There is a whole science behind this that is hard to explain in this little space.

Answer 3

The valleys are where the water will collect, causing a leak. Thr ridges are the best bet. I've walked on a lot of the roofs that you mention and the screws are always on the ridges. Good luck.

Answer 4

ok, they rubber washer screws must go in the ridge. They should be tightened only to the point that they secure the roofing, that is how you know how tight to get them. If you put them in the valley you will generally strip the screw and it will leak. If you want a pro opinion talk to a roofer...a qualified roofer..with experience in metal roofs..you are going to get both opinions...Ben Franklin said something about common sense, right?

Answer 5

Check the manufactures recommendation and installation guide. Just search for "corrugate roofing installation. "

Answer 6

On the ridges. Then the water runs away

Answer 7

In the valleys

If you put them in the ridges it will break at that point

Answer 8

On the top using a rubber washered nail or screw.
Don't over tighten or bend the metal it will increase the chances of a leak.
Hope this helps.

Answer 9

the valleys, however the screws must have a rubber seal under them to prevent leaks,you can find these screws at any metal bldg supply, some hardware stores and most lumber companies

Answer 10

the valleys