6 Tips for Installing Metal Roof Insulation

A metal roof with a dormer

To help with energy conservation and noise pollution, many office buildings and homes use metal roof insulation as a way to cut down on these issues. The metal roof has been a very popular roofing material for some time, but people have just started using insulation within the roofing system as a means to block out sound and keep heat in. Installing metal roof insulation is not a difficult project. Here are a few tips to help you complete your metal roofing project yourself.

Use Foam Batting

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The best material for use with metal roof insulation is in the form of foam batting. This is different from the normal roll-up type of insulation as it comes in panels rather than paper covered fiberglass. This foam can be used on either the outside or the inside of the sheathing. You will want to use this over rolled up or spray insulation because of the way that it lays flat and it can be easily installed under the metal roofing.

Lay Insulation on Paper Liner

One of the most common mistakes that DIY homeowners make with their metal roof is that they do not lay down any type of paper wrap on the sheathing. This paper wrap is important to the health of the home by not allowing water to build up in the space between the sheathing and the metal roof. As a place where mold can quickly grow, it is important to make sure that the paper liner is placed between the insulation and the sheathing.

Install with Staples

The easiest, and by far the quickest, way to install metal roof insulation is with 1½ inch staples. You can easily go through several sheets of insulation and know that they are secure. Another benefit of using staples is that they do not make a large hole when penetrating into the sheathing. You will also be able to remove them much easier if there are any repairs that need to be made.

Cut Panels on Roof

Before doing any work with the metal roof insulation you should have it brought up onto the roof. This reduces the need to go up and down the ladder for tools, pieces of insulation, and making measurements. Make all cuts to the foam panels on the roof for more accurate cuts and quicker placement.

Leave Gaps between Panels

A roof must be able to breathe. When there are gaps, or channels, between the pieces of insulation, you allow the air to flow between each one. The gaps do not have to be more than 1/8 inch, but they are important to the health of the roof, the insulation, and the house as a whole.

Place Between Purlins if Using Them

One of the more popular methods of placing metal roofing on a home is to lay down purlins across the existing shingles. In this case, simply lay the insulation between the purlins. Make sure that the insulation you are using is the same thickness so that the metal roof will fit better.

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