Frequent question: Can architectural shingles be roofed over?

The quick answer is yes you can re-roof architectural shingles over existing architectural shingles (however you must check with the shingle manufacturer as well). Having said that it will be nearly impossible to get a good looking quality installation.

Can architectural shingles be installed over 3 tab shingles?

Differences in Installation

However, you cannot apply three-tab shingles over architectural shingles. Most manufacturers also state that the warranty may be voided if architectural shingles are applied over existing roofing materials.

Can you put a second layer of architectural shingles on a roof?

The standard practice is to limit to a total of two layers of shingles. After that, you should tear-off old shingles before installing a new layer. … Technically architectural shingles can be re-roof over existing architectural shingles.

Can you do a layover on dimensional shingles?

A roof can only have one layover done. Therefore, if your roof already has two layers of shingles (layered separately) you cannot have a layover done on top of it. … Layover may be a good option for those homes whose asphalt shingled roof is old enough to be replaced but the overall structure of the roof is sound.

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How long do architectural shingles last?

Lifespan. Because of their durability and high-quality composition, architectural shingles generally have a longer lifespan than the 3-tab variety. They stand up better to weather conditions such as heat, snow, ice, rain, and strong winds. Their average lifespan is about 18 to 20 years.

Is it OK to put metal roofing over shingles?

In almost every case, the answer is yes, you can lay down a new metal roof over an existing shingle roof. This is one of the many reasons metal roofs keep growing in popularity – their installation doesn’t require completely tearing off the existing roof, which is a time-consuming and expensive job.

What is the advantage of architectural shingles?

Architectural asphalt shingles are thicker and stronger. They have more weight which makes them less likely to move or fall off even in higher winds. Their extra thickness also makes them harder to damage. This kind of roof is simply more durable and will last longer.

Do I need to tear-off old shingles?

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.

How much is architectural shingles?

When it comes to cost, architectural shingles typically runs $35 to $45 per bundle. Three-tab shingles cost an average of $25 to $30 per bundle. On the surface, the architectural shingles are 40 to 50 percent more expensive.

How long does a reroof last?

The 26 gauge and 29 gauge cheaper metal roofing options can last for up to 25 years if taken care of. On the high-end, the 24 gauge metal roofing option can last for up to 50 years. However, most manufacturers offer a 20-year warranty and some even a lifetime warranty which is dependent on the metal used.

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How many bundles of shingles make a square?

Here are a couple more examples: A package of shingles is called a bundle. 3 bundles = 1 roofing square (98.4 sq. ft.)

What is considered a new roof?

What Is a Roof Replacement? A roof replacement involves tearing off everything on the roof down to the deck, then putting on new felt paper and shingles. A roof replacement can be done no matter how many layers of shingles are already on the roof, so it can be done even when a reroofing is not an option.

Can you put shingles over other shingles?

You might be able to lay new shingles over existing shingles and avoid the cost of tear-off. … Some roofers install a layer of waterproof shingle underlayment (WSU) over the existing shingles at the eave end, as would be done for a roof laid on bare sheathing. This provides added protection against ice dams.

Can you put a second layer of shingles?

A second layer of shingles will decrease the integrity of your new roof and lower its lifespan. That’s because shingles aren’t designed to have a second layer of shingles on top of them! Plus, all that extra moisture and heat being applied to the first layer of shingles will make that first layer age faster.

Can you put tar paper over shingles?

Answer: Roofing felt is a layer of tar paper installed beneath the shingles to provide a backup waterproof membrane in case of leakage. Felt, otherwise known as underpayment, is required when asphalt shingles are installed as a first layer of roofing or when they are applied over wood shingles or a built-up roof.

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Roofs and roofing