Home Improvement

Should you use ice and water shield on my whole roof?

Should you get ice and water shield installed? You can (and should, in my opinion) insist on installing ice & water shielding throughout your entire roof, especially if you know your home is prone to ice dam leaks. Just be prepared for push-back from your roofer.

Should you ice and water shield entire roof?

However, in most circumstances, you should not put ice and water protectors on the entire roof deck. Other synthetic underlayment options such as IKO’s Stormtite® provide the protection that the rest of the roof deck needs.

How long does ice and water shield last on a roof?

The original, fully-adhered roofing underlayment, Grace Ice & Water Shield®, now has an extended exposure limit of 90 days. For more than 35 years, Grace Ice & Water Shield® has been the brand that roofing contractors and architects trust most to specify and install on marquee projects around the world.

Should ice and water Shield go over or under drip edge?

The best way is to install the roof drip edge only along the eaves first, then place ice-and-water barrier (in the snowbelt) or felt paper (underlayment) over the drip edge. This lets any water that gets on the roof run down the underlayment and over the drip edge.

How far up should ice and water shield go?

Basically all penetrations through the roof should be covered with an additional layer of ice and water barrier. Ice and Water should be applied at least 2” around all penetrations and should be installed running at least five inches up any sidewalls or chimneys.

Is ice and water shield necessary?

It’s crucial to have ice and water shield installed on/around certain areas of your roof, like roof valleys, around penetrations, and on roofs that have a 2/12, 3/12, or 4/12 pitch. Because of its importance, every roof needs to have it. There’s also a code if you live in an area above the snow line in the US.

Do you need underlayment with ice and water shield?

In some areas, ice and water shielding may be required. But even if it isn’t required, in most areas, this type of underlayment is often still a wise choice because it serves as an added layer of protection against moisture. In particular, these underlayments are a good choice in areas that experience severe weather.

How much ice and water shield do I need on my roof?


Because you need to add that into your calculation. So you take your soffit. Which is your bottom calculation height and then what you're trying to figure out is how far up this roof deck you need to

Can ice and water shield be left exposed?

Grace Ice & Water Shield can be left exposed for up to a full 30 days and can even be used as a temporary roof if final roof coverings are delayed. Unlike many thicker membrane underlayments with laps that are visible through roof coverings, Grace Ice & Water Shield remains invisible.

Can you put ice and water shield over shingles?

Answer – Not in the handyman’s opinion. An Ice & Water Shield is a rubberized strip that must be applied over bare sheathing; not only will it stick better on the bare sheathing, but it will present a more neat appearance. So, shingles should be removed three feet up from the eaves.

Where do you put ice and water shield on roof?

On the roof right around the eaves. Here the ice and water shield needs to be installed. Right along the bottom of the eave. And typically it's going to be three feet up or just one roll out of your

Do you nail ice and water shield?

When nails penetrate the ice and water shield on the roof, the rubberized nature of the material creates a gasket effect on the shaft of the nail. Leaks simply don’t happen. Not only does ice and water shield stop leaks caused by ice dams, but it also stops leaks created by fierce wind-driven rain.

Is it OK to put a new roof over an old one?

You can only install a new roof over an old one if the old roof is completely flat and level. Several factors might cause the existence of curling shingles; therefore, it is advisable to involve a professional roofer to determine the cause and replace the shingle before proceeding to a re-roof.

How long does it take to reroof a house?

In general, the roof of an average residence (3,000 square feet or less) can be replaced in a day. In extreme cases, it could take three to five days. Depending on the weather, complexity, and accessibility of your home it could even take up to three weeks.

Should I tear off my old roof?

In most cases, more than two layers of roofing shingles does require a tear-off. Laying new shingles over old shingles is easily prone to leaks and reduces the life of the new shingles. This alone ought to be reason enough to do a tear-off; it’s just a bad value not to.

Can you put new plywood over old on a roof?

As long as the new plywood itself can span the distance and carry the roof, wind, seismic and snow loads for your region, adding new ply over old is just fine. The new plywood thickness should be at least equal to the exusting plywood thickness.

Should I Resheet my roof?

Your New Roof



The most efficient and cost effective option is to resheet directly over the shiplap with exterior grade plywood. This is acceptable by code, as well as the roofing manufacturers. Your new composite shingle will be installed securely to the new solid surface and last for years leak free.

Can you put plywood over rotted wood?

If you’ve got rotten subfloor, you will need to replace those pieces before covering with plywood. The new material needs to be the same thickness as the old, so you may need to use shims or have custom milled lumber made for the patches.

What is roof planking?

Plank decking was the main type of decking used before the invention of plywood. This type of decking is made up of elongated and rectangular wooden boards that come in 2 different sizes, 1×6 or 1×8. While it’s not as commonly used, you’ll still find this kind of decking used on roofs today.

What goes on top of plywood on roof?

When installing metal roofing, you should always use a roofing felt layer between the metal roofing and the plywood. It is also advisable to use a slip sheet to protect the felt. You may be able to layer it on top of your current roofing, but you need to check with your local building codes before doing so.

How far should roof sheathing overhang fascia?

The best installation method is to leave a gap between the drip edge and the fascia board, about the width of a finger. The shingles should also overhang the drip edge 3⁄8 to 1/2 an inch.

Is OSB OK for roof sheathing?

Using OSB For Roof Sheathing



You can use an OSB body for the exterior roof sheathing on your home. The OSB material is different from plywood. But it has become increasingly popular for roofers. It’s all thanks to how well the OSB material can stay strong and secure for long-term use.

What is the best roof sheathing?

OSB is now the most-used sheathing and subflooring material for new roofs and roof replacements. OSB is currently selling for less than plywood by approximately $3 per sheet, meaning a savings of several hundred dollars per conventional home.

What is the best thickness for roof sheathing?

What is the Standard Roof Sheathing Thickness? Standard roof sheathing thickness is ½” to ⅝” thick. If you are using OSB for your roof deck, then ⅝” is the recommended thickness. For plywood, which is slightly stronger than strand board, ½” thick is appropriate.

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