how do you weatherize an old house?

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Attic ventilation and rafter insulation work together to protect the roof from winter’s effects 😁 The ventilation system lets the attic breath, which keeps the attic roughly the same temperature as the outside air 🔥 Insufficient attic ventilation results in a temperature imbalance which can cause ice dams 🔥 Warm attic air warms and melts snow on roof roofs after a snowstorm. This moisture can seep under flashing and shingles. At night, this moisture is refrigerated by the outside cold, creating an ice-dam. It lifts the roofing material and flashing from the roof deck as the ice dam grows. This is a daily process that causes the roof material to fall off. [1]
Although insulation may not be necessary for all components of a building envelope, it’s difficult to deny that the nine-inch solid brick wall above is insulating. Those walls have a U value of 2.30W/m² (current Building Regulations demand 0.3W/m²). Just 50mm of polyurethane (PUR) insulation will get that down to 0.39W/m². But that insulation will move the dew point – where condensation occurs – from the external surface of the wall to within the brickwork. Frost may then begin to flake from the bricks’ exterior surface. [2]
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If you live in colder areas, your boards can be installed inside walls. Keep warm air to prevent it from escaping. Before switching to spray foam insulation, Tom used to use polyisocyanurate panels that way—he would build a 2×4 wall, insulate between the studs with batting (paper face removed), then cover the whole thing with foil-faced panels and seal them with foil tape before putting up wall board. He would have a bit more space because of the R-values of both batts on the board and batts on the 2×4 walls. Ayse parham, Grenoble France (last updated on 5/14/2017) [3]
Image #3 It is also important to note that the exact assessment of the energy tradeoff between products and their embodied value depends on the material used, the way they are manufactured, and the delivery method. Although this is complex, an estimate can be made based on the material’s embodied energy. Modern boilers, such as the aluminum heat exchangers, have an embodied energies of up to 200 MJ/kg. The steel body however has an energy of only 32 MJ/kg. Let’s assume the average value is between 120MJ/kg and 200MJ/kg. That means that for 24 KW boilers, the embodied heat is around 1,200 kWh. [4]
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Kelly-Anne Kidston

Written by Kelly-Anne Kidston

I am a writer of many words, from fiction to poetry to reviews. I am an avid reader and a lover of good books. I am currently writing my first novel and would love to find some beta readers who are interested in getting an early look.

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