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Table of building insulation costs (C) Daniel Friedman Greenhouse Insulation Choices Described

for Energy Savings

Greenhouse insulation advice:

This article discusses insulation options for greenhouses and nighttime insulation options for solariums and cold or drafty windows.

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Advice for Insulating a Greenhouse or Solarium Against Night Time Heat Loss

The table of insulation properties at page top and accompanying text are reprinted/adapted/excerpted with permission from Solar Age Magazine - editor Steven Bliss.

The question-and-answer article about insulation options for greenhouses or solariums, quotes-from, updates, and comments an original article from Solar Age Magazine and written by Steven Bliss.

Question about how to best insulate a greenhouse against night time heat losses:

We have a greenhouse with a 30- by 20-foot vertical south-facing wall and have searched in vain for a thermally efficient and aesthetically acceptable nighttime insulation.

Also, we plan to add a brick floor on top of our slab which is insulated only on the perimeter and always feels cold. Should we put an inch of blue styrofoam under the brick to isolate it completely from the slab? We have no significant overheating problem. - P.P.

Answer:

Greenhouse floor slab insulation retrofit (C) Daniel Friedman Steven BlissA number of options for nighttime insulation were described in "Warm Wraps for Cold Windows", Solar Age, 6/83. Slab floors, even if they are insulated, tend to be chilled by downdrafts from cold window surfaces.

So you should look for a window insulation with good edge seals to reduce the cold air flow at night.

If you find that window insulation does not solve the cold floor problem, then adding insulation to the slab would be in order.

Your approach should work well as long as the brick will provide adequate thermal storage for your design.

To increase the new floor thickness, and thus its thermal mass, you can set the brick on edge.

Since you are setting the brick over compressible material, a flexible (mortarless) paving system would be easiest.

In this type of system, the floor bricks are tightly packed to one another without wet mortar. A mix of sand and dry mortar may be swept between the joints and dampened for a more solid and less permeable floor.

You may set the bricks on the foam insulation or add a layer of plywood underlayment first. In either case, a double layer of 15# felt paper is recommended directly under the brick to cushion and protect the underlayment.

Since heat loss is greatest from slab edges, you might want to thermally isolate the new floor from the foundation walls by adding a foam strip at the floor's edge.

You can conceal the foam strip with a baseboard (sketch above-left).

Here we include solar energy, solar heating, solar hot water, and related building energy efficiency improvement articles reprinted/adapted/excerpted with permission from Solar Age Magazine - editor Steven Bliss.

Original Solar Age Magazine article on greenhouse insulation and night time insulation

Q&A: Insulating a Greenhouse: Insulation for Greenhouses or Solariums - PDF version; use your browser's back button to return to this page

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Continue reading at GREENHOUSE DESIGN for SOLAR HEATING for a discussion of greenhouse trombe wall and ventilation for solar heating, or select a topic from the closely-related articles below, or see the complete ARTICLE INDEX.

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INSULATION LOCATION for GREENHOUSE or SOLARIUM at InspectApedia.com - online encyclopedia of building & environmental inspection, testing, diagnosis, repair, & problem prevention advice.


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INDEX to RELATED ARTICLES: ARTICLE INDEX to BUILDING INSULATION

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Technical Reviewers & References

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  • Solar Age Magazine was the official publication of the American Solar Energy Society. The contemporary solar energy magazine associated with the Society is Solar Today.

    "Established in 1954, the nonprofit American Solar Energy Society (ASES) is the nation's leading association of solar professionals & advocates. Our mission is to inspire an era of energy innovation and speed the transition to a sustainable energy economy.

    We advance education, research and policy. Leading for more than 50 years. ASES leads national efforts to increase the use of solar energy, energy efficiency and other sustainable technologies in the U.S. We publish the award-winning SOLAR TODAY magazine, organize and present the ASES National Solar Conference and lead the ASES National Solar Tour – the largest grassroots solar event in the world.    "
  • Steve Bliss's Building Advisor at buildingadvisor.com helps homeowners & contractors plan & complete successful building & remodeling projects: buying land, site work, building design, cost estimating, materials & components, & project management through complete construction. Email: info@buildingadvisor.com
    Steven Bliss served as editorial director and co-publisher of The Journal of Light Construction for 16 years and previously as building technology editor for Progressive Builder and Solar Age magazines. He worked in the building trades as a carpenter and design/build contractor for more than ten years and holds a masters degree from the Harvard Graduate School of Education. Excerpts from his recent book, Best Practices Guide to Residential Construction, Wiley (November 18, 2005) ISBN-10: 0471648361, ISBN-13: 978-0471648369, appear throughout this website, with permission and courtesy of Wiley & Sons. Best Practices Guide is available from the publisher, J. Wiley & Sons, and also at Amazon.com
  • Mark Cramer Inspection Services Mark Cramer, Tampa Florida, Mr. Cramer is a past president of ASHI, the American Society of Home Inspectors and is a Florida home inspector and home inspection educator. Mr. Cramer serves on the ASHI Home Inspection Standards. Contact Mark Cramer at: 727-595-4211 mark@BestTampaInspector.com
  • PASSIVE SOLAR DESIGN HANDBOOK VOLUME I [PDF], the Passive Solar Handbook Introduction to Passive Solar Concepts, in a version used by the U.S. Air Force
  • PASSIVE SOLAR DESIGN HANDBOOK VOLUME II [PDF], the Passive Solar Handbook Comprehensive Planning Guide, in a version used by the U.S. Air Force - online version available at this link and from the USAF also at wbdg.org/ccb/AF/AFH/pshbk_v2.pdf [This is a large PDF file that can take a while to load]
  • PASSIVE SOLAR HANDBOOK VOLUME III [PDF], the Passive Solar Handbook Programming Guide, in a version used by the U.S. Air Force - online version available at this link and from the USAF also at wbdg.org/ccb/AF/AFH/pshbk_v3.pdf
  • The Passive Solar Design and Construction Handbook, Steven Winter Associates (Author), Michael J. Crosbie (Editor), Wiley & Sons, ISBN 978-047118382 or 0471183083
  • "PASSIVE SOLAR HOME DESIGN [PDF] ", U.S. Department of Energy, describes using a home's windows, walls, and floors to collect and store solar energy for winter heating and also rejecting solar heat in warm weather.
  • In addition to citations & references found in this article, see the research citations given at the end of the related articles found at our suggested

    CONTINUE READING or RECOMMENDED ARTICLES.

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