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It is normally advised to get rid of existing roof shingles when setting up new ones. Certain areas in the attic can pose significant fire and wellness threats. Prior to air sealing and insulating an attic room, guarantee you or your professional address the complying with health and wellness and safety and security issues. Inspect the chimney and surrounding framing for signs of charring, residue down payments, falling apart stonework or mortar, or proof that the chimney cellular lining is wearing away.


Have a chimney professional repair work, seal and insulate it at the exact same time. Commonly a space exists where a masonry smokeshaft passes through the attic room. To air seal this area, initially set up sheet steel flashing to bridge this space and afterwards secure all the joints with a non-combustible sealant (make certain the product is ranked for this application).


An air and vapour barrier covers the floor of the attic room area and is secured to the joists with acoustical sealant. Factory-built steel chimneys must be kept from contacting insulation by a minimal 75 mm (3 in.) unless otherwise defined by producer or neighborhood authorities. Install a non-flammable radiation guard that keeps a 75-mm (3-in.) air area in between the smokeshaft 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 degree of existing or brand-new insulation to be included. To protect against insulation from dropping behind the guard, affix a clamp-type tornado collar without sealer on top of the radiation guard, as received Number 5-4.


A radiation obstacle develops a 75 millimetre or 3-inch air area around the smokeshaft and prolongs 75 millimetres or 3 inches over the attic room insulation, keeping the range from flammable products. The top of the barrier is a storm collar clamped, not sealed, to the chimney. Over the ceiling, the air and vapour obstacle is covered around the drywall to speak to the firestop sealer.


A collar-like ceiling trim plate is affixed listed below the firestop. Common interior recessed lights are challenging to air seal effectively and can come to be a fire danger if covered with insulation.

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This also supplies the chance to much better seal and shield the existing dental caries. If you find a substantial quantity of animal droppings and vermin in the attic room, do not disrupt them since they can harbour conveniently air-borne moulds, bloodsucker eggs and microorganisms that can trigger serious illness.


Seal the complying with areas: Around the plumbing stack and any type of other pipes. For plastic plumbing stacks that go up and down due to thermal expansion, make use of an adaptable gasket or a polyethylene sleeve secured to a plywood collar (see Number 5-6). Around cords or ceiling lights that permeate the attic floor and partition and exterior wall surface leading plates (see Number 5-7 and Figure 5-8).




Around the chimney. Building regulations require that air rooms in between smokeshafts and floor or ceiling assemblies via which they pass be secured with a non-combustible fire stop (see Figure 5-3 and Figure 5-4). Along the side of common wall surfaces. There is often a void in between the celebration wall (such as the common wall surface between units in duplexes, triplexes and row residences) and the side of the attic floor.

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A hefty polyethylene sheet which is caulked with acoustical sealant and stapled to the ceiling encloses the electrical box. An electric wire diverts from the electrical box and down via a hole right into an interior wall surface. Holes around electrical cables are loaded with caulking or foam sealant, and caulking seals voids along the top of the interior wall surfaces.


Attic air flow offers a number of functions. It decreases summer warm build-up, extending the life of roof covering and reduces a/c lots. After air sealing, attic air flow is your 2nd line of defence versus the water vapour that might have located its way into the attic room - Attic insulation. It makes sure a chillier, well-vented attic area less susceptible to the formation of ice dams at the eaves.




You may have to situate roof or soffit vents from outdoors if they are not plainly visible from inside the attic. Homes with peaked roofs and accessible attic rooms are the simplest to vent by using the proportion of 1 to 300. This proportion refers to unobstructed air vent area to the insulated ceiling location.


Do not use electrical exhaust fans for attic air flow as these can draw extra air than can be provided through the soffit vents. This will in fact pull house air right into the attic, resulting in better heat loss and dampness build-up. They are also vulnerable to failure, sound production and raised energy use.

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The following Parts information the ideal approach depending on your attic type. After you have checked the attic room and lugged out any restorative job, emphasis first on air and moisture control.


On the other hand, spray foam provides air securing and a first layer of excellent quality insulation that can be covered up to the desired RSI (R) level (Attic insulation). If the attic retrofit is being completed combined with interior remodellings, the simplest method is to set up a new, single air and vapour barrier on the bottom of the ceiling joists


Around the smokeshaft. Building regulations call for that air spaces in between chimneys 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 space in between the celebration wall (such as the common wall surface between systems in duplexes, triplexes and row residences) and the edge of the attic room flooring.


A hefty polyethylene sheet which is caulked with acoustical sealant and stapled to the ceiling encloses the electric box. An electric wire leads away from the electric box and down through a hole the original source right into an interior wall. Openings around electrical cables are full of caulking or foam sealant, and caulking seals spaces along the top of the indoor walls.

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After air securing, attic room ventilation is your second line of protection versus the water vapour that may have found its way right into the attic room. It makes sure a chillier, well-vented attic space much less prone to the development of ice dams at the eaves.


You may have to locate roof or soffit vents from outside if they are not plainly noticeable from inside the attic. Houses with peaked roofs and available attics are the easiest to air vent by making use of the proportion of 1 to 300. This ratio describes unblocked vent location to the protected ceiling area.


Do not use electrical exhaust fans for attic room air flow as these can draw more air than can be supplied with the soffit vents. This will actually draw home air into the attic room, causing better warm loss and wetness accumulation. They are additionally vulnerable to failure, sound production and enhanced power use.


The complying with Parts detail the best strategy depending on your attic room type. After you have inspected the attic room and lugged out any type of remedial work, emphasis initially on air and wetness control.

How Green Attics can Save You Time, Stress, and Money.

On the various other hand, spray foam provides air securing and a preliminary layer of high top quality insulation that can be topped up to the preferred RSI (R) level. If the attic room retrofit is being completed in combination with interior restorations, the easiest strategy is to install a brand-new, solitary air and vapour barrier on the bottom of the ceiling joists.