Posts Tagged ‘ice and water shield’


English: This image exhibits the different pit...

English: This image exhibits the different pitches (rise/run) for roofs, and the number corresponding to that pitch is displayed below the roof line. The number is spoken as “1 in 12” (for the first pitch provided). This means that for every 1 unit of rise, the roof has 12 units of run. (Photo credit: Wikipedia)

Last time i was here i blabbed about how to get on the roof safely and now we’ll talk about how to remove the existing roof and prep for the new roof that requires smooth and nail free deck.
When installing a new roof, capping the ridges are the last thing to do but since we are installing a new roof, we start removing the capping first. Pry all the roofing nails with RED ripper and remove all the caps. Hold on a second; did you tie yourself down? Gravity and height are very dangerous to mess with. Hook your lanyard to the rope-grab or some call it choker and adjust your rope length as you work. Normally i would rip 2 sheets at a time and make myself a pile to grab with my ripper and launch it in the trailer if trailer is just there. If not the wheel barrow has to make few trips. Once all the shingles are cleared off the roof, broom the dirt and dust of the deck as much as possible. Its time to check for any nails left behind and pry it all out. Check for any lose, bowed, spongy and rotten plywood and if any replace. Now we have a solid and clean roof deck to prep for the new roof.

Depending on the pitch of the roof we will determine how many feet of ice and water shield is needed. Are there any metal valleys? If there is any, i would install  3 feet of ice folded in to 1.5 from bottom of the valley to the top before the valley. Once the metal valleys are in and chalked lined 4 inches at the bottom and 2 inches at the top we will install 3 feet of ice and water shield on both sides of the valley to sandwich the metal for a life lasting seal. I always sandwich my valleys doesn’t matter what the pitch is. If this is a typical one story bungalow with 3/12 pitch, we need 9 feet of ice and water shield. If it was 6/12 slope six feet of ice and water shield would be more than enough but 3 or 4 twelve pitch needs to be sealed very carefully. Ice dams are more likely to back in to the house if this is a low slope home and there is not enough ice and water shield. It’s very easy to install. Overlap lines are printed on the roll. Drive 3 roofing nails and unroll the length you need and cut with a straight blade. Hook knife works too but you have to be quick. Align the ice&water with the drip-edge if there is any, if not install drip-edge. Peel the bottom film and stick, peel the top film and stick. Re-align if needed and nail the top line with hand nails. Repeat the same step any times as you like 3, 6 and 9 feet. Cover the rest of the exposed deck with #15 or #30 felt paper with hand nails or staples but i personally hand nail it. Once the entire roof is prepped it should be water tight.

Installing the shingles does take time but not as much as removal and prepping. I only install step at a time. I’ll build myself a staircase along the edge or a valley and work myself up. Some like to install it straight up but that would be incorrect. Manufacturer will void your warranty if it is not installed according to manufacturer guidelines. Every bundle has the installation details printed on the wrapper. If using an air gun be sure to adjust the debt of the nail. If nails are going thru the shingle, adjust the compressor and the gun for a smooth landing. Once nails are flush with the shingle than we are in business. 4 nails per shingle if it’s a 25 years 3-tap shingle, 5 to 6 nails per architectural high wind shingles.
When capping the ridges, use chalk line for a straight finish. Minimum 2 nails per cap. Caulk any exposed finishing nails, around the vents and plumber boots. Good clean up around the house will complete the projects.

We are a local roofing company in Ottawa Ontario offering quality roofing, siding, foundation repairs and snow removal services with pride.

Line art drawing of a shingle roof

Line art drawing of a shingle roof (Photo credit: Wikipedia) Stepping

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Photo of soffit with perforated vinyl sections...

Photo of soffit with perforated vinyl sections for air flow into attic space. (Photo credit: Wikipedia)

Roll formed metal fascias on a house in Northe...

Roll formed metal fascias on a house in Northern Australia. Portable roll forming machines make it possible to make long lengths on the building site, thus reducing joints. The eaves or soffit lining can be seen. (Photo credit: Wikipedia)

A small water spot on the ceiling of a room. T...

A small water spot on the ceiling of a room. This water damage was caused by rainwater leaking into a roof. (Photo credit: Wikipedia)

water-damaged siding and rotten wood

water-damaged siding and rotten wood (Photo credit: Random McRandomhead)

If you have gutters installed all around your house there may be few sections around the house where the water works its way through behind the gutters. During winter months there may be ice build up as well.

When replacing a roof first layer of shingles are installed backwards to create a straight edge. Normally they are called starter strips and they stick out almost an inch from the fascia. Second row of shingle are installed right over the starter strips. Suppose of starter strips are to act as an drip-edge to allow water to run down without making contact to plywood or get behind the fascia and cause damage. If you have water dripping from your soffit, it is caused by not having starter strips or drip-edge installed properly or you have damaged shingles causing water damage.

Drip-edge is the first thing that gets installed on the fascia. Ice and water shield gets installed right over the drip edge and followed by tar/felt paper overlapping from button to top. Having a second layer of protection under neat the shingles is beneficial to every home. If wind has flipped or tore some of your shingles tar/felt paper will protect the plywood from water damage until all the necessary repairs are completed. If the water does make its way under neat the shingles it will run right into your gutter if you have any. It will slow down the process of water damage before it is corrected.

When it comes to replacing a pitched or flat roof it is highly recommended to take all the necessary steps to get the job done right.
We are a local roofing company located in Ottawa, Ontario offering residential and commercial roofing and siding services. We are fully insured and registered. If you are looking to get an estimate for your new project, contact us and we will be more than happy to provide you a free estimate.