Recent Q&A

• Ventilation above foam on roof application?

  Just looking for others' opinions. Zone 5. 200-year-old colonial. Skinning existing old board sheathing with 1/2" plywood. Ice and water whole thing as air barrier. Adding 3 inches polyiso, 2.75…

• EPS over polyiso on reroof?

  So based on everything thing I am reading should we be using R3 R4 or R5 for each inch of Polyiso since it decreases in performance as it gets colder.…

• Exterior rigid foam details/concerns for roof

  Finally am at the point of redoing my attached Ell roof on my 200+ year old colonial. This is what I currently have. Zone 5 Inside 3/4 inch pine (obviously…

• Building a house on piers

  So if I am building a house on piers (zone 5) based on 2012 IECC, the ceiling has R-49, the floor has R-30 (or minimum 19), and the walls have…

• Any issues with using rigid foam board as in fill in exterior walls.

  200+ year old colonial I am residing from the exterior. Removing everything so I am looking at the back of the horse hair plaster. Could dense pak cellulose or have…

• Curious on what everyone thinks about these fans that claim to remove cooler damp air from finished basements.

  The two that I come across are Airtech and Humidex. The "science" behind them doesn't seem to add up for me. Just wondering what others views are on these products.…

• 200 + year old home with no insulation in walls

  I will be removing the exterior sheathing and addressing air sealing & insulation from the exterior. Interior walls (plaster &wood lathe) are in good shape and the windows are not…

• 薄管ard or fiberglass-lined ducts versus metal ducts?

  I have never liked duct board or ducts lined with fiberglass. The idea of the porous insulation on the interior just doesn't seem like a good idea. The porous surface…