December 6, 2016 hphmr_thumb

475 Presents: High Performance Historic Masonry Retrofits

30 Minute Webinar Video We recommend you download the companion eBook and CAD details for this presentation.   Description: The goals of historic preservation and energy efficiency and comfort often seem in conflict, as higher insulation levels can pose new risks to these timeless structures. Yet it need not be so. This comprehensive presentation discusses […]

Continue Reading
July 7, 2016 DuncanTitleScreen

VIDEO: How To Hit 0.23 ACH50 In A Historic Masonry Retrofit

Behind The Scenes of a Super-Tight Retrofit Project in Fort Greene, Brooklyn Before we set up the blower door, before we check for gaps in the air barrier, and even before we complete the walk-through; we can get a good sense for how airtight a project will be based on the look of the air barrier. Does […]

Continue Reading
June 9, 2016 Victoria_BEWISO

NEW: PHI-A Certified, Simulated Double-Hung, Landmark Windows

The VICTORIA Window We’re excited to introduce the newest addition to the 475 High Performance Building Supply product line: VICTORIA windows. We’re debuting this new, important addition at the NAPHN16 Conference. If you’re attending, please make sure to speak to us at the 475 booth, or contact us online for further details. This well-crafted fenestration comes to us from BEWISO […]

Continue Reading
January 26, 2016 439-Bergen-Front-Facade-e1445713379954-199x300

Historic Masonry: Notes and Details (updated)

475 in many ways started with historic masonry retrofits, and with our HQ surrounded by Brownstone Brooklyn, we are helping a great many of these 100+ year old buildings get high-performance/Passive House retrofits for the 21st century.  Our deep interest in making these retrofits work, has led us to produce public interest articles, eBooks, details and extensive […]

Continue Reading
January 13, 2015 BrickTest

Insulating Historic Masonry Buildings Safely: How WUFI Can Help

With the rising popularity of Passive House and EnerPHit renovation in brownstone and brick masonry renovations in the US and Canada, the question comes up time and time again: What insulation levels are needed to create an efficient structure and how far should and can we push interior insulation levels without running into issues? One […]

Continue Reading
December 10, 2014 HistMasonryEbook

Get your FREE 475 eBook: High Performance Historic Masonry Retrofits

475 is proud to now offer a free beta version of our first eBook. High Performance Historic Masonry Retrofits is a comprehensive look at the materials and details required to make masonry building transformations a success. We lay out all the details necessary for optimizing building airtightness, vapor control, and continuous insulation. There are detailed chapters on the walls, roofs, cellars […]

Continue Reading
July 24, 2014 Jane Sanders

475 On-Site: Historic Brownstone Passive House Retrofit in Brooklyn, NY

Architect and homeowner Jane Sanders gives us a tour of her historic brownstone retrofit in Park Slope, Brooklyn, preparing for EnerPHit certification through the Passive House Institute. Build With Prospect CEO Jeremy Shannon points out details and lessons learned on this project, which is the 6th Passive House retrofit accomplished by his team.

Continue Reading
February 19, 2014

475 Does WUFI®: Mold Potential and Historic Masonry Retrofits in Climate Zone 6 (Burlington, VT)

A key piece of the puzzle as we decarbonize our building stock is successfully retrofitting historic masonry buildings to high performance standards that provide energy efficient operation and comfort while preserving the structural integrity of these timeless buildings for future generations. We have written often that preservationists and energy efficiency advocates need not be in opposition, […]

Continue Reading
December 12, 2013

Tight Historic Masonry Rowhouse Renovation by Caliper Studio

On Prospect Avenue in Brooklyn, NY, Caliper Studio‘s gut renovation of a brick brownstone rowhouse used what has become the typical Passive House project approach: very good triple-pane glass windows, thermal bridge free LAMILUX skylights, and a interior insulation with cellulose and Pro Clima INTELLO membrane as the smart vapor retarder and air barrier. We […]

Continue Reading
July 8, 2013

475 Presentation: High Performance Historic Masonry Retrofits

The goals of historic preservation and energy efficiency and comfort often seem in conflict, as higher insulation levels can pose new risks to these timeless structures.  Yet it need not be so. This comprehensive presentation discusses strategies for minimizing the apparent conflict while allowing for the highest possible performance – ensuring that the integrity of […]

Continue Reading
May 17, 2012

How to airseal a Brownstone to PH standards (party walls)

Brick party walls leak, so how do we airseal them? Solid brick walls leak. Imagine that the mortar joints are a labyrinth of air-transfer straws – connecting one side of the party wall to the other, or to the outside, and thus causing much leakage during the blowerdoor test. After some trial & error, we have come […]

Continue Reading