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It is typically advised to eliminate existing roof shingles when setting up new ones. Particular locations in the attic can position significant fire and wellness threats. Prior to air sealing and shielding an attic, ensure you or your professional address the adhering to wellness and security concerns. Examine the smokeshaft and surrounding framing for signs of charring, residue deposits, collapsing stonework or mortar, or evidence that the smokeshaft lining is degrading.

Have a chimney specialist repair service, seal and protect it at the same time. Typically a gap exists where a masonry smokeshaft goes through the attic room. To air seal this location, initially mount sheet steel flashing to connect this void and after that secure all the joints with a non-combustible sealer (ensure the product is rated for this application).

An air and vapour barrier covers the floor of the attic space and is sealed to the joists with acoustical sealer. Factory-built steel smokeshafts should be kept from speaking to insulation by a minimum 75 mm (3 in.) unless or else specified by manufacturer or regional authorities. Install a non-flammable radiation guard that keeps a 75-mm (3-in.) air space between the smokeshaft and insulation.

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The top of the radiation guard need to additionally be a minimum of 75 mm (3 in.) greater than the level of existing or brand-new insulation to be added. To stop insulation from dropping behind the guard, connect a clamp-type storm collar without sealer at the top of the radiation guard, as shown in Number 5-4.

A radiation barrier develops a 75 millimetre or 3-inch air space around the smokeshaft and prolongs 75 millimetres or 3 inches above the attic insulation, keeping the range from flammable materials. The top of the barrier is a storm collar clamped, not sealed, to the smokeshaft. Above the ceiling, the air and vapour barrier is twisted around the drywall to speak to the firestop sealant.

A collar-like ceiling trim plate is affixed listed below the firestop. Work safely around electrical wiring (switch off the power). Talk to an electrical service provider if questionable circuitry or corroded electric links are present. Basic indoor recessed lights are tough to air seal effectively and can become a fire threat if covered with insulation.

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This also offers the possibility to far better seal and protect the existing tooth cavity. If you locate a significant quantity of animal droppings and vermin in the attic, do not disturb them due to the fact that they can harbour conveniently airborne moulds, parasite eggs and microorganisms that can cause severe ailment.

Seal the adhering to locations: Around the pipes stack and any kind of various other pipes. For plastic plumbing stacks that move up and down due to thermal development, utilize a versatile gasket or a polyethylene sleeve secured to a plywood collar (see Number 5-6). Around wires or ceiling lighting fixtures that pass through the attic flooring and dividers and outside wall leading plates (see Figure 5-7 and Number 5-8).


Around the smokeshaft. Building regulations need that air spaces between smokeshafts and flooring or ceiling assemblies whereby they pass be secured with a non-combustible fire stop (see Number 5-3 and Number 5-4). Along the side of shared walls. There is usually a void between the celebration wall surface (such as the common wall between devices in duplexes, triplexes and row residences) and the side of the attic flooring.

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A heavy polyethylene sheet which is caulked with acoustical sealer and stapled to the ceiling frames the electric box. An electric cord diverts from the electric box and down through a hole into an interior wall surface. Holes around electric cables are filled up with caulking or foam sealant, and caulking seals voids along the top of the interior walls.

After air sealing, attic air flow is your second line of defence versus the water vapour that might have found its means into the attic room. It makes certain a chillier, well-vented attic area less susceptible to the formation of ice dams at the eaves.



You may have to find roofing system or soffit vents from outdoors if they are not plainly noticeable from inside the attic. Houses with actually peaked roofing systems and accessible attic rooms are the most convenient to air vent by utilizing the proportion of 1 to 300. This proportion describes unhampered air vent area to the shielded ceiling location.

Do not make use of electric exhaust followers for attic room ventilation as these can attract extra air than can be supplied via the soffit vents. This will actually pull home air right into the attic, leading to better warmth loss and dampness build-up. They are likewise vulnerable to failing, sound production and raised energy usage.

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The area of vents is as essential as their number and kind. Usually, a mix of kinds and places will certainly work best. The following Components detail the very best method depending upon your attic type. After you have actually evaluated the attic room and executed any type of remedial job, focus first on air and moisture control.

On the other hand, spray foam offers air sealing and an initial layer of high quality insulation that can be topped approximately the preferred RSI (R) degree (Home energy audit). If the attic retrofit is being finished along with interior improvements, the most convenient approach is to mount a brand-new, single air and vapour barrier on the bottom of the ceiling joists

Structure codes call for that air areas between smokeshafts and floor or ceiling assemblies via which they pass be sealed with a non-combustible fire stop (see Number 5-3 and Number 5-4). There is often a void in between the celebration wall surface (such as the shared wall in between devices in duplexes, triplexes and row homes) and the side of the attic floor.

A hefty polyethylene sheet which is caulked with acoustical sealer address and stapled to the ceiling encases the electric box. An electric wire diverts from the electrical box and down with an opening into an indoor wall surface. Holes around electrical cords are full of caulking or foam sealer, and caulking seals gaps along the top of the interior wall surfaces.

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After air securing, attic room ventilation is your second line of defence versus the water vapour that might have discovered its way into the attic room. It makes sure a chillier, well-vented attic space much less susceptible to the formation of ice dams at the eaves.

You might need to locate roofing system or soffit vents from outside if they are not plainly visible from inside the attic. Residences with actually peaked roofing systems and available attics are the most convenient to air vent by making use of the proportion of 1 to 300. This ratio refers to unblocked vent area to the insulated ceiling area.

Do not utilize electrical exhaust followers for attic room air flow as these can draw more air than can be supplied through the soffit vents. This will in fact draw residence air right into the attic room, resulting in higher warmth loss and wetness buildup. They are also susceptible to failure, noise manufacturing and enhanced power use.

The following Parts information the ideal technique depending on your attic type. After you have actually evaluated the attic room and brought out any type of remedial work, focus first on air and dampness control.

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On the various other hand, spray foam uses air securing and a preliminary layer of premium quality insulation that can be covered up to the preferred RSI (R) degree. If the attic room retrofit is being completed combined with interior remodellings, the most convenient strategy is to mount a brand-new, solitary air and vapour obstacle on the bottom of the ceiling joists.

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