Friday, 18 September, 2020

Roofing – Under the Shingles – What’s Under the Asphalt, Metal, Wood, Rubber Or Clay Tiles

Image result for roofing

Imagine, you are standing on the sidewalk, looking at a normal property. You find the siding, the windows, front door, and way up above, you find the roof. Maybe it’s made from rubber or metal tiles? Everything you see is where the attention goes, but it is what you don’t find that really matters. So, let us discuss what goes on, under the shingles.

We learn to crawl before we walk, so when speaking about roofing let us begin with square one, the surface area of your roof that’s made of wood. Your timber roof deck is similar to an automobile’s metallic body. It’s installed in addition to the simple house frame to provide a surface area on which to set up Shingles. With no roof deck installed in your residence, there will be nowhere to put in your Shingles. And of course with no shingles, your roof deck would rust off as a result of exposure to sunlight, rain, snow and ice and etc.. .Not a cozy home at all!

Plywood or OSB boards are installed in a staggered formation with small spaces between them allowing wood to expand and contract as the wood warms in summer time and cools in the winter. Older homes frequently have lengths of 2″ x 6″ installed rather than plywood or OSB board. When the time comes for you to replace your Roof System, don’t forget to have your Calgary Roofing Contractor replace all damaged wood.

Bear in mind, if your roof deck is rotting or damaged at all, people walking on your roof could potentially crack or break through the wood, causing additional damage to the roofing system, such concerning the shingles. . .and to whoever walked on it! But most roof decks can defy a small amount of exposure to water or ice until it has to be replaced.

Drip edge and Rake edge is the first portion of this Roof System to be set up. It’s a long and narrow piece of metal that’s installed along each end of your Roof Deck, ie: along the eaves trough and across the gable ends.

Some are local building codes require that the installation of Drip Edge and Rake Edge and other construction codes don’t. Check with your local city construction offices to learn. Therefore many new houses and/or low budget roofing systems don’t have drip edge installed so as to allow for cheaper roof rates.

Drip and Rake edge is offered in a number of different colours and sizes and can be custom built for the demands of your roofing system. Installing an suitable drip edge often saves hundreds and sometimes even thousands of dollars as soon as your roof system needs replaced.

If your Roof System doesn’t currently have trickle or rake edge installed, don’t panic, you are going to survive well enough. Just bear in mind that when your roof has to be replaced, the roofing contractor renton wa that you might want to replace some of your timber Roof Deck on an as required basis.

Steel: Chimneys and Skylights

Arguably, the most essential part of every complete roofing system. The alloy installed in the valleys, chimneys, and skylights take the brunt of water flow on each roof. Poorly installed, a completely new roof system may produce a waterfall from your living room.

Each chimney and skylight need what’s called”a rear pan”, which is composed of sheet metal brushed at approximately a 90 degree angle (determined by the slope of your roof) and tucks under the shingles and up under the siding, stucco or counter flashing onto the chimney or skylight. Every back pan requires a little 2″ part of metal sticking out 1″ or more from both sides of the chimney or skylight to divert water away from the corners. Water must hit the metal back pan and be steered away on both sides where it could continue its run to the eaves trough.

In precisely the exact same way water runs across the valleys between two hills, water runs across the valleys in your roof peaks. Valleys generally get the maximum concentration of water flowing through them, therefore installing them properly is vitally important!

As stated in the Leak Barrier segment, valleys have escape barriers installed under them. Though some Building Codes do not need such a flow barrier to be installed, we recommend installing one consistently in each valley.

A word of warning: Many roofing contractors install valleys in a fashion called’closed’. A closed valley is made up of Shingles woven within the valley, rather than a’open’ valley that has sheet metal running from top to bottom. Both the’open’ and the’closed’ style of setup are acceptable by the most Building Codes and from many producers, but the’open’ style installation has consistently out performed the’closed’ style. . .and costs the exact same cost to install. Consult your Roofing Contractor to utilize the’open’ style of setup for your roofs valleys, this could save you from having to replace your roof system and also can avoid headaches in the long term. This metal can be ordered in any colour to match the shingles on your roof system.

Think about a flow barrier as a”second layer” of protection to your Roof Deck. A backup program, if you will, in addition to a protection against moisture build up. Leak barriers are almost always installed in addition to the Drip Edge and Rake Edge metal along eaves trough regions, cable regions and valleys due to the threat these areas pose for leaks, ice build up, shingle corrosion and water back flow.

If you have ever looked at your roof during winter, you will see how snow and ice build up over the length of your eaves troughs and within the roof valleys. Just like Rake Edge and Drip Edge, some Building codes need Leak Barriers to be set up and a few Construction Codes don’t. In Alberta, the Building Code requires a flow Barrier to be installed on all eaves trough and valley regions of a Roof Systems due to issues associated with such ice and snow build up. As an optional update, a few high end roof systems even have flow barriers installed in addition to the complete Roof Deck (instead of only along the distinctive regions we just mentioned) where generally a normal Roof Deck Protection would normally have been set up.

Virtually all roofs in Calgary, Alberta have escape barriers installed, and lots of distinct kinds of leak barriers can be found in the current market, each offering a different degree of reliability, performance and warrantee and produced by several manufacturers.

Choosing a suitable Leak Barrier and installing it correctly is an important step in each Roof System. Speak with your Roofing Contractor to find out more about leak barriers, how to pick the best one and how to pick a Professional Roofing Contractor to install it.

The difference is that Roof Deck Protection is set up on the complete Roof Deck area rather than only on”special areas” as we mention in the Leak Barrier section.

Much like Leak Barriers however, there are lots of unique kinds of Roof Deck Protection available to choose from ranging from fundamental felt/tar paper to innovative plastic woven sheets of tear and wrinkle-proof material.

A word of warning; most roofing businesses utilize felt paper as Roof Deck Protection. Although using felt paper is a standard and acceptable practice, some difficulties can arise if the felt paper gets wet during or after the installation. In a similar manner, felt paper could curl if water or excessive moisture rolls it. Because of this, and because the price is rather small, we recommend installing a high quality Roof Deck Protection like a GAF/ELK Deck Armour. For a relatively small additional cost, you will be rewarded with a far more dependable Roof Deck Protection.

Consult your local trusted Roofing Contractor about which under-layer will be ideal for your Roof System any why.


So there it is, life under the shingles. See just how much goes on behind the scenes? Professional roofing contractors know this stuff inside and out and will help tremendously in ensuring that a roof system is dependable for several years. Product suppliers like GAF/Elk and IKO can help answer certain questions about products also.