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It is generally recommended to remove existing shingles when installing new ones. Certain areas in the attic can pose significant fire and carcinogen. Before air securing and protecting an attic, ensure you or your contractor address the adhering to health and wellness issues. Check the smokeshaft and bordering framing for signs of charring, residue deposits, crumbling stonework or mortar, or proof that the chimney cellular lining is weakening.


Have a chimney professional repair work, seal and insulate it at the exact same time. Typically a void exists where a masonry smokeshaft goes through the attic room. To air seal this area, initially install sheet steel flashing to link this gap and after that seal all the joints with a non-combustible sealer (make sure the product is ranked for this application).


An air and vapour obstacle covers the flooring of the attic room and is secured to the joists with acoustical sealer. Factory-built steel chimneys need to be avoided getting in touch with insulation by a minimal 75 mm (3 in.) unless or else defined by supplier or local authorities. Mount a non-flammable radiation guard that keeps a 75-mm (3-in.) air room in between the chimney and insulation.

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The top of the radiation guard should likewise be a minimum of 75 mm (3 in.) greater than the level of existing or new insulation to be included. To stop insulation from falling back the guard, attach a clamp-type storm collar without sealer at the top of the radiation guard, as received Number 5-4.


A radiation obstacle produces a 75 millimetre or 3-inch air space around the smokeshaft and prolongs 75 millimetres or 3 inches above the attic insulation, preserving the range from combustible materials. The top of the obstacle is a tornado collar clamped, not secured, to the chimney. Over the ceiling, the air and vapour barrier is wrapped around the drywall to get in touch with the firestop sealant.


A collar-like ceiling trim plate is attached listed below the firestop. Typical indoor recessed lights are hard to air seal successfully and can end up being a fire danger if covered with insulation.

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As an option to typical recessed or pot lights take into consideration light-emitting diode (LED) flush or flat mount components for far better energy performance. This additionally supplies the opportunity to better seal and insulate the existing cavity. Guarantee that fixture installment instructions are complied with. If you find a substantial quantity of animal droppings and vermin in the attic room, do not disrupt them since they can harbour conveniently airborne moulds, bloodsucker eggs and bacteria that can cause serious health problem.


Seal the following areas: Around the plumbing stack and any other pipes. For plastic plumbing stacks that relocate up and down as a result of thermal development, use a flexible gasket or a polyethylene sleeve sealed to a plywood collar (see Number 5-6). Around cords or ceiling light components that pass through the attic room flooring and dividing and outside wall surface leading plates (see Number 5-7 and Number 5-8).




Around the smokeshaft. Building regulations call for that air rooms between smokeshafts and flooring or ceiling settings up via which they pass be sealed with a non-combustible fire stop (see Figure 5-3 and Figure 5-4). Along the side of common walls. There is typically a gap between the event wall (such as the shared wall between systems in duplexes, triplexes and row homes) and the side of the attic floor.

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A heavy polyethylene sheet which is caulked with acoustical sealer and stapled to the ceiling encases the electric box. An electrical cord leads away from the electric box and down with a hole right into an indoor wall. Holes around electric cables are loaded with caulking or foam sealant, and caulking seals voids along the top of the interior wall surfaces.


Attic air flow serves a number of objectives. It lowers summer season warmth build-up, lengthening the life of roof covering and decreases ac unit tons. After air securing, attic room ventilation is your 2nd line of protection versus the water vapour that might have discovered its means right into the attic room - Spray foam insulation. It makes sure a chillier, well-vented attic room area less prone to the formation of ice dams at the eaves.




You might need to situate roof covering or soffit vents from outdoors if they are not clearly visible from inside the attic room. Residences with actually peaked roofs and available attics are the easiest to air vent by utilizing the ratio of 1 to 300. This proportion describes unblocked vent location to the shielded ceiling location.


Likewise, do not use electric exhaust followers for attic room ventilation as these can draw more air than can be supplied via the soffit vents. This will in fact draw house air right into the attic room, causing better warm loss and moisture accumulation. They are also susceptible to failing, noise production and raised energy usage.

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The following Components detail the finest strategy depending on your attic kind. After you have checked the attic room and carried out any type of restorative job, focus initially on air and moisture control.


On the various other hand, spray foam offers air sealing and an initial layer of premium quality insulation that can be covered up to the wanted RSI (R) level (Solar attic fans). If the attic retrofit is being finished along with interior renovations, the simplest approach is to mount a new, solitary air and vapour obstacle on the underside of the ceiling joists


Around the chimney. Building regulations require that air spaces in between chimneys and flooring or ceiling assemblies through which they pass be sealed with a non-combustible fire stop read the full info here (see Number 5-3 and Figure 5-4). Along the side of common walls. There is frequently a gap in between the event wall (such as the common wall surface in between devices in duplexes, triplexes and row homes) and the edge of the attic floor.


A heavy polyethylene sheet which is caulked with acoustical sealer and stapled to the ceiling encases the electrical box. An electric wire leads away from the electric box and down through an opening into an interior wall surface. Holes around electric cords are loaded with caulking or foam sealant, and caulking seals voids along the top of the interior walls.

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Attic ventilation offers a number of objectives. It minimizes summertime warmth accumulation, prolonging the life of roof covering and minimizes air conditioner lots. After air securing, attic air flow is your second line of support against the water vapour that may have located its method into the attic room. It ensures a cooler, well-vented attic room area less prone to the development of ice dams at the eaves.


You may need to find roofing or soffit vents from outside if they are not clearly noticeable from inside the attic room. Houses with peaked roof coverings and accessible attic rooms are the simplest to vent by utilizing the ratio of 1 to 300. This ratio describes unblocked vent location to the protected ceiling area.


Additionally, do not use electrical exhaust followers for attic ventilation as these can attract much more air than can be supplied via the soffit vents. This will actually pull residence air into the attic, causing higher heat loss and dampness build-up. They are also vulnerable to failure, sound production and boosted energy usage.


The adhering to Components information the finest method depending on your attic kind. After you have actually checked the attic and carried out any kind of therapeutic work, focus initially on air and wetness control.

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On the other hand, spray foam offers air securing and a preliminary layer of top quality insulation that can be covered as much as the desired RSI (R) degree. If the attic retrofit is being completed along with indoor restorations, the easiest strategy is to set up a brand-new, single air and vapour obstacle on the bottom of the ceiling joists.