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How To Insulate Attic Hatch With Cellulose Insulation

Attic Access Dam Insulation Diagram
One of the critical areas where homes lose energy efficiency is at the attic access hatch.  Regardless of the insulation product type used, air leaks from a poorly insulated attic access will result in higher heating and cooling bills.  This is often an item missed by DIY homeowners. But even some professional installers can fail to get it right, particularly when it comes to cellulose insulation.

With blown in cellulose, dams can be added to build up insulation around the opening while also prevent the product from falling through the attic access hatch when opening. These should be high enough to reach above the required depth of insulation around all sides of the opening. Dams must be secured to the attic joists or flooring so they are stable and resist movement as people access the attic.

The attic hatch itself can be insulated with a ridged foam piece cut to the same size as the hatch. This will work with the dams to make the access highly insulated while also keeping the hatch light enough to open and close. Air seal gaskets can also be added for even more sealing around the hatch.

Check your attic to make sure it’s properly insulated and be sure that includes the access hatch. If either are not up to par you are wasting energy and spending too much each month to on heating and cooling the home.

Find more tips and how to posts here on the Greenest Insulation Blog.

2018-04-04 12:53:41
Julisa Mac says:

if I have someone to come to do the cellulose insulation for my artic, how can I know that the cellulose that they used is a premium brand or a lower & cheaper brand?

I really appreciate your answer to my question.

2018-04-13 14:16:57
CIMA Admin says:

Thanks for your inquiry Julisa. The best way to ensure you are receiving the highest quality cellulose insulation product is to be sure it is produced by a member of the Cellulose Insulation Manufacturers Association. CIMA producer members can be found on our website at Also, look for the CIMA logo on the insulation bags. You can also get referrals for insulation contractors experienced with cellulose insulation for your area by checking with CIMA Producers who distribute products in your state. Use the contractor referral services on the website at

Thanks again for considering cellulose insulation for your home.