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Creating a watertight metal roof, whether a DIY standing seam roofing project, or any other kind of metal roof, can be a far more complex process that initially contemplated - particularly if using pre colored sheeting, where painting over waterproofing is not a viable option. Here are a few of the basics you need to consider to make sure you have a leak proof metal roof.

When undertaking a DIY standing seam roof, or another metal roofing project, investigating these waterproofing tips will certainly offer a roof with a much longer lifespan!

Metal Sheet Fixings

Choosing the right fixing for your new metal roofing is critical. Factors to be considered are the base structure - is it timber or wood? The type of sheeting also plays a role, with regards to the length of fixing, as does the sheet finish - galvanized sheeting requires galvanized screws or nails, while zincalume requires a zincalume screw or nail.

Most important, choose a fixing with a built in cap. These are both weatherproof, being plastic, and help coordinate with color sheeting - the cap being available in a range of colors. DIY standing seam roofing projects in particular can be made much easier by using the right fixings!

Sealant

There are a variety of sealants around, the two major groups being silicone or mastic. Silicone has the benefit of being available in a clear variant, therefore being invisible once applied. Mastic however, often offers a much longer lifespan, since it does not dry out or shrink.

Polyclosures

Polyclosures are die cut polyester foam rubber strips, cut to follow the contour of the sheet profile. Fitted under flashings, and secured with silicone or mastic, they prevent wind driven moisture from entering the roof space under the flashings. Most companies offering wholesale metal roof materials will also offer a specifically designed polyclosure for the profile you choose.

Flashings

Depending of the layout of your roof, you may require any one, or a combination of sidewall, headwall, ridge, hip or apron flashings, or perhaps another specialized flashing altogether. Flashings are generally affixed after the metal roof sheeting is completely laid and trimmed, and affixed using stainless steel or aluminum rivets. These rivets should then be sealed with silicone or mastic. Careful planning when deciding how to install a metal roof will mean that you have all of these, and other accessories on hand, and don't experience any delays!

Where chimneys are fitted lower on a pitched roof, a special flashing is generally manufactured. Called a soaker sheet, they are designed to channel all water that would accumulate behind a chimney around the chimney and off the roof, thereby preventing water from damming up behind chimneys and damaging the metal sheeting.

Laps

Roof sheeting is always laid lengthways, so that the pan, or channels, can divert water off the roof. The sheets always overlap, known as a side lap, usually by one rib. However, on very low pitches, particularly when using a poor water channeller such as corrugated sheeting, double laps (two rib overlaps) may be a good idea.

It is also never a good idea to end lap a sheet. This means to overlap the sheet lengthways with another sheet. While it may save money in the short term, the overlap will almost always be the site of rust, since water will seep between the two sheets and accumulate there. Asking a roofing professional for metal roof installation instructions can certainly help avoid this kind of mistake!

When in doubt with regards to waterproofing accessories for your metal roof, whether a DIY standing seam roofing project, or otherwise, it would be advisable to seek out a roofing professional or sheeting manufacturer for advice. Many offer free advisory, or even estimating services, to help you make the right choices for you roof.

Click these links to learn more about Installing Standing Seam Roofing and DIY Standing Seam Roofing.

Tap and Dies

Taps and dies are tools used for cutting threads while usually sold in sets they are in fact individual tools. A tap is which looks like a bolt if used for making the female thread (nut) and the die which resembles a nut is used to make the male thread (bolt).

Usually made from HSS (high speed steel) alloy steel and are extremely robust and have very hard cutting edges. This is needed as both the tap and dies have threads like those on nuts and bolts that are used to bore threads in smooth metal. A tap screws into a hole and makes it in to a threaded hole and a die puts a thread in to smooth shafts.

These tools are most commonly used to repair threads that have been striped or crossed.

Using a Tap

When using a tap care must be taken not to break the tap off mid repair. Due to the type of steel and heat treatment used to get the hard cutting edge taps can be quite brittle. If a piece of the tap id broken off in a hole it can be extremely hard to remove it and as the tap will probably harder that the average drill bit even drilling it out is not always an option.

However if used properly you shouldn't have any problems. Usually they get broken by bending not twisting and in most sets a "T" handle will be supplied allowing you to easily turn the tap without bending it. Generally most problems are caused by trying to turn a tap with an inappropriate tool like mole pliers.

When preparing to you a tap to create a thread its essential that you drill the correct size hole for the tap that you are using to small and will be very hard to cut the thread and you will likely break the tap and too large and the thread will not be cut deep enough and easily striped.

Tap Drill Chart

Tap Size mm | Drill Size mm

2.3                   1.9
2.6                   2.1
3.0                   2.5
3.5                   2.9
4.0                   3.3
4.5                   3.8
5.0                   4.2
6.0                   5.0
7.0                   6.0
8.0                   6.8
9.0                   7.9
10.0                 8.5
11.0                 9.5
12.0                 10.2

Once you have the correct size hole using the "T" handles turn the tap in to the hole. As the tap cuts strips of metal will be pushed out of the flutes (grooves). To prevent the flutes becoming clogged up, this is done by turning the tap backwards and braking the metal strips up. Ideally you should turn the tap one half turn or until you feel increased resistance then turn back a quarter turn. On very deep holes it would be advisable to completely withdraw the tap from time to time.

It is also advisable to use some king of cutting fluid you can buy special cutting fluid but if you are using the tap but hand any general oil will do the job.

Using a Die

To repair a crossed threads on a bolt simply select the die from your set that is an exact fit for the bolt. It's advisable to apply a drop of oil to the bolt and run the die down the bolt. If the die gets tight and you feel high resistance just run the die back up the bolt and start again.

To create threads on a smooth shaft select a die that just smaller than the size of the shaft and a couple of drops of oil on the die blades and work the die down the shaft. As with the tap a half turn should be followed by a quarter turn back to prevent the die from becoming clogged.

About the Author

IMG Automotive is an online supplier of Tap and Die Sets, for a comprehensive range of specialist automotive tools please visit our site.

95 CHRYSLER SEABRING DIES WHILE DRIVING?! ANY IDEAS?

Its not a convertable and its a V8 and not a stick shift.. but sometimes when I'm driving down the freeway or on a main street, my car dies in the middle of driving.. and to re start it I have to take a spark plug wire and put a screw driver in it and touch it to metal.. thats what a guy who stopped to help me start it again said to do and it works.. but i cant keep doing this everytime, cuz its dangerous... any ideas on what this could be?! maybe the spark plugs?? also, my spark plugs, one of them has oil in the hole, and one other one has white all over it.. i know i have to replace them, but does anyone know if that could be the problem of why it wont start sometimes? im a little confused, and dont have the money right now til i get paid to take it into a shop so i have to do it myself, cuz i have to get to work and back.. any ideas??

i .t could one of 4 things 1 one plugwire or sparkplugs low comp in one cyl or trigger coil you need to take it to someome who has a scanner to read the codes on your comp.

WEEKEND: Concerts/shows July 16-22
Here are the selected local concert events from this week's edition of Weekend. To browse more events, or submit your own, go to www.nhregister.com/events.

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This entry was posted on Thursday, April 23rd, 2009 at 12:00 pm and is filed under Hand Tools. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.