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It is usually recommended to remove existing tiles when installing new ones. Particular locations in the attic can present significant fire and wellness threats. Prior to air sealing and protecting an attic, ensure you or your contractor address the complying with health and wellness worries. Inspect the chimney and bordering framing for signs of charring, soot deposits, collapsing stonework or mortar, or proof that the chimney cellular lining is weakening.


Have a smokeshaft professional repair service, seal and shield it at the same time. Commonly a space exists where a masonry chimney travels through the attic room. To air seal this area, initially set up sheet steel blinking to connect this gap and after that seal all the joints with a non-combustible sealant (ensure the product is ranked for this application).


An air and vapour barrier covers the floor of the attic space and is sealed to the joists with acoustical sealant.

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The top of the radiation guard ought to also be a minimum of 75 mm (3 in.) more than the level of existing or brand-new insulation to be added. To stop insulation from falling behind the guard, affix a clamp-type tornado collar without sealer on top of the radiation shield, as received Figure 5-4.


A radiation barrier 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 distance from flammable products. The top of the obstacle is a tornado collar clamped, not sealed, to the smokeshaft. Over the ceiling, the air and vapour obstacle is wrapped around the drywall to call the firestop sealer.


A collar-like ceiling trim plate is affixed below the firestop. Work securely around electrical circuitry (transform off the power). Talk to an electric specialist if doubtful electrical wiring or rusty electric links are existing. Standard indoor recessed lights are challenging to air seal effectively and can come to be a fire threat if covered with insulation.

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As a choice to traditional recessed or pot lights consider light-emitting diode (LED) flush or level install fixtures for much better energy efficiency. This likewise offers the opportunity to better seal and protect the existing dental caries. Make certain that component setup directions are adhered to. If you discover a significant quantity of animal droppings and vermin in the attic, do not interrupt them since they can harbour conveniently airborne moulds, parasite eggs and bacteria that can trigger serious disease.


Seal the complying with areas: Around the pipes stack and any other pipelines. For plastic pipes heaps that relocate up and down because of thermal growth, utilize a versatile gasket or a polyethylene sleeve secured to a plywood collar (see Figure 5-6). Around wires or ceiling lighting fixtures that pass through the attic flooring and dividing and exterior wall surface top plates (see Number 5-7 and Number 5-8).

Around the chimney. Structure codes call for that air spaces between chimneys and flooring or ceiling assemblies with which they pass be secured with a non-combustible fire quit (see Figure 5-3 and Number 5-4). Along the side of common walls. There is frequently a space in between the party wall (such as the common wall surface between units in duplexes, triplexes and row residences) and the side of the attic room floor.

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A hefty polyethylene sheet which is caulked with acoustical sealant and stapled to the ceiling encases the electrical box. An electric wire leads away from the electric box and down with a hole right into an indoor wall surface. Openings around electrical cords are full of caulking or foam sealant, and caulking seals voids along the top of the indoor wall surfaces.


After air securing, attic air flow is your 2nd line of protection versus the water vapour that may have found its means right into the attic room. It guarantees a chillier, well-vented attic space less prone to the formation of ice dams at the eaves.




You may have to situate roofing or soffit vents from outdoors if they are not clearly noticeable from inside the attic. Residences with actually peaked roofings and accessible attics are the easiest to vent by utilizing the ratio of 1 to 300. This ratio describes unhampered vent location to the protected ceiling area.


Also, do not make use of electric exhaust fans for attic ventilation as these can attract much more air than can be supplied with the soffit vents. This will actually draw home air right into the attic room, leading to better warmth loss and wetness build-up. They are additionally vulnerable to failure, sound production and increased power usage.

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The place of vents is as essential as their number and type. Frequently, a blend of types and locations will work best. The following Parts information the very best method depending on your attic type. After you have checked the attic and executed any therapeutic job, emphasis initially on air and dampness control.


On the various other hand, spray foam supplies air sealing and a preliminary layer of premium quality insulation that can be topped as much as the wanted RSI (R) level (Attic insulation). If the attic retrofit is being finished together with interior improvements, the simplest technique is to mount a new, single air and vapour barrier on the bottom of the ceiling joists

Building codes call for that air areas between chimneys and flooring or ceiling settings up through which they pass be secured with a non-combustible fire stop (see Number 5-3 and Number 5-4). There is typically a gap between the celebration wall (such as the shared wall surface in between units in duplexes, triplexes and row houses) and the side of the attic room flooring.


A heavy polyethylene sheet which is caulked with acoustical sealer and stapled to the ceiling encloses the electrical box. An electrical cord leads away from the electric box and down with an opening right into an interior wall. Openings 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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After air sealing, attic room ventilation is your second line of defence versus the water vapour that may have found its way into the attic. It guarantees a cooler, well-vented attic space much less susceptible to the development of ice dams at the eaves.


You may need to locate roof or soffit vents from outside if they are not clearly noticeable from inside the attic. Residences with peaked roof coverings and obtainable attic rooms are the easiest to vent by utilizing the ratio of 1 to 300. This proportion describes unobstructed air vent location to the insulated ceiling area.


Additionally, do not utilize electrical exhaust followers for attic air flow as these can attract more air than can be provided via the soffit vents. This will actually draw house air into the attic room, leading to better heat loss and dampness accumulation. They are also susceptible to failing, sound production and increased energy use.

The following Components detail the ideal technique depending on your attic room type. After you have actually inspected the attic and lugged out any restorative work, focus initially on air and wetness control.

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On the various other hand, spray foam her latest blog offers air sealing and a first layer of top quality insulation that can be topped approximately the desired RSI (R) level. If the attic room retrofit is being completed combined with indoor restorations, the simplest approach is to mount a new, solitary air and vapour barrier on the underside of the ceiling joists.