Roof Insulation Basics: Upgrading Roof Insulation – DIY Tips

There are two reasons homeowners want to make their homes greener; some people want to go green to protect the environment. Others will go green because it results in more green dollar bills in their wallet.

Fortunately, the two don’t have to be exclusive; you can protect the environment and save money at the same time. A big way to do so is to make sure that you have adequate insulation and ventilation for your roof and the attic space.

Heat rises, and that means most of the heat loss from your home goes out the top of the house. This is especially true if you don’t have adequate insulation and sealing in your attic’s floor space. To make sure your home is as comfortable as possible, to ensure minimal heat loss, to save money on your heating bills, and to help protect the environment, an upgrade in your insulation is in order.

A Wide Variety of Insulation Options

Making the decision to improve your home’s attic and roof insulation is the easy part. The hard part, however, is determining what type of insulation to use, and where to put it.

Attic Insulation

The easiest (unless you’re having a new roof put on the house), and most effective, way to boost the insulation in your home is to insulate and air seal the attic floor. Many homes have at least some access to this space, and because of the size attics can hold quite a bit of insulation. But where you put the insulation, and what type, can vary even inside the space.

Between the Joists – If you have an unfinished attic space, the most common area to insulate is between the ceiling joists but leaving the area between rafters uninsulated. This provides for maximum air flow through the attic while keeping the living space insulated.

Most commonly the spaces between the joists are filled with blow-in fiberglass insulation. However, the do-it-yourselfer may want to lay down fiberglass batting as it’s easier to work with and there is no special equipment needed. How much should you have? It’s recommended that the R value be at least R-38; or 10-14 inches of insulation.

Between the Rafters – Many homes have increased their living space by finishing the attic. But without insulating the ceiling, the space would be largely uninhabitable most of the year. If this is the case, then you want to insulate between the rafters.

Before you slap up insulation, however, you must remember that the house needs room to “breathe.” If your insulation is pressed tightly against the bottom of the roof decking, there’s nowhere for the air to go, and you can end up with major problems. To counter these problems, baffles are installed to keep a small space between the insulation and the roof deck. As the air in the baffles heats up, it can flow to the peak and out the roof vent.

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Types of Asphalt Roofing Shingles: 3-Tab vs. Architectural: Costs

Like all products, asphalt shingles have advantages and disadvantages for home improvement. However, unlike all other home remodeling projects, a new asphalt shingle roof provides the most bang for your buck in terms of returned value over the short term (read as in the next decade).

asphalt shingles on a house

In this guide, we’ll explain what makes for a fully installed asphalt shingled roof, how it gets done, but perhaps most importantly how you can be squarely involved in the selection process for all the materials.

Nearly a century and a half ago, asphalt roofing didn’t exist. So, in short order, this product went from being a new kid on the block to the number one way people in North America cover their homes!

Really, it’s more like 1901 as the first implementation of asphalt shingles and roughly 40 years later is when hundreds of millions of feet of the product were being produced.

Since the mid 1900’s, asphalt shingles have maintained popularity and received some changes like fiberglass mat and multiple layers or laminates with dimensional shingles to keep up with an ever-evolving roofing market.

How popular are asphalt shingles? It’s estimated that 70% to 80% of all homes in the U.S. are covered with some version of them.

The industry generates over $10 billion in revenue annually and yet contributes over 22 billion pounds of waste each year. Their ongoing mass production, though, does have the significant benefit of being able to obtain bundles of the product at a price that no other roofing material can match.

And because the skill set, along with the tools needed for installation are relatively low, the DIY route is more plausible with this product than most other types of roofing materials.

Still, unless you are a professional contractor, the knowledge of what product to select may seem too challenging to go the DIY path. Fortunately, retail outlets such as Home Depot and Lowe’s make the process as easy as possible. Our goal is to help you along that path.

The Basics:

The basics of a traditional asphalt shingle are cloth-like paper or fiberglass mat as a base material, with asphalt layer on top of the base as the primary waterproof material, followed a protective coat of stone/mineral granules made of hard rock.

The stone granules are designed to meet the exact specs for a specific shingle. The granules can also be made solar-reflective to achieve Cool Roof certification ratings that are required in select markets like California (CA Title 24 home building standards).

The cloth-like paper base was traditionally used back in the day with the “organic shingles”, but today, almost all asphalt shingles are made with a fiberglass mat as the base material, hence the name fiberglass shingles.

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