Question: How Do I Install A Subfloor In My Attic?

How do I build a subfloor in my attic?

Position the plywood sheet so that the longest side of the sheet lies perpendicular to the joists and the ends of the plywood lie directly on the chalk lines.

If the plywood overhangs the chalk line and joist, measure and cut the plywood accordingly.

Leave a 1/4-inch gap between the attic wall and the plywood edge..

What should not be stored in an attic?

7 Things You Should Never Store in Your Basement or AtticDelicate fabrics. … Furniture and décor made from natural materials. … Important papers. … RELATED: The Safe Way to Store Important Papers »Food (unless you store it carefully) … Electronics. … Candles. … Anything flammable (near heat sources)More items…•Nov 24, 2014

Does attic storage add value?

When deciding whether to incorporate an attic space, consider the advantages: Relatively low cost. Added value for the home owner. Easier and safer access.

Should I insulate my attic floor or ceiling?

1. In unfinished attic spaces, insulate between and over the floor joists to seal off living spaces below. If the air distribution is in the attic space, then consider insulating the rafters to move the distribution into the conditioned space.

Can you over insulate an attic?

But there may be a theoretical point of “too much.” If a home is over-insulated and is too tightly sealed, moisture can get trapped inside. Without proper ventilation, a home can build up too much moisture, especially in the attic (warm air rises), which can cause mold problems and, overall, lower indoor air quality.

Can I put a floor in my attic?

Adding a floor to an attic can increase storage space or create a new room. Before you start creating a floor for your attic, you must make sure that it can handle the additional load. Then, you’ll need to build a grid-like structure that can hold up the plywood flooring.

How much does it cost to put floor in attic?

Attic Flooring Cost The cost of attic flooring ranges from $3,000 to $16,000, depending on what you already have. The existing floor joists may not support weight, so you’ll probably need most of these services: Price to replace floor joists: $1,000-$10,000. Cost to install subfloor: $500-$800.

How do you know if your attic can be converted?

Roof Rafters or Trusses Another factor that determines whether you can convert your attic is the presence of roof rafters vs. roof trusses. Traditional rafters look like triangles; trusses look like triangles with smaller triangles inside of them—the boards forming these small triangles are called chords and webs.

Is it safe to store things in the attic?

It is safe to store items in your attic as long as you are careful. Before you store anything in your attic, consider how fragile the items are. Attics, especially an Arizona attic, can feel like an oven during the summer.

Can you put plastic over insulation in attic?

4 Answers. Plastic isn’t recommended in this situation because it would create a second vapor barrier that can trap moisture and result in condensation and mold. Craft paper would have the same problem, this is what is most likely on the other side of the insulation for the vapor barrier you want.

What type of plywood should I use for attic floor?

CDX plywoodAn attic can be floored with 1/2″ CDX plywood, if it is being used only for storage. However, the same can’t be said if you are planning on using the space as a living space. In that case, you will need to use 3/4″ thick plywood. As an alternative, 3/4” OSB can be used.

How thick should Plywood be for an attic floor?

You need 3/4-inch plywood. The thinner plywood is acceptable when the joist spacing is 16 inches. If you plan to finish the floor in the attic and turn the room into a living space, however, you should always use 3/4-inch plywood.

How much weight can attic joists support?

Attic Joists for Live Loads You also need to ensure that the joist spacing is adequate. In many cases, ceiling joists for dead loads are designed to carry 10 pounds per square foot (psf), as opposed to the 40 or greater psf that live-load joists must carry. Span length is different for every room.

What is the best flooring for an attic?

Resilient flooring, such as laminate or vinyl, is one of the best choices you can make for attic floors. This type of flooring can soften the sounds when installed over an underlayment.

How much weight can the average attic floor hold?

Most trusses are designed for only 10 lbs psf live load for storage, unless they are attic trusses like Drooplug mentioned. You’ve added about 300 lbs already when you put 6 sheets of plywood up there. As Larry said, don’t overdo it.

Can you cover attic insulation with plywood?

Once the insulation is down, you can turn your attic into valuable storage space by covering the floor with plywood. It will also make the attic a safer place in which to walk.

Is OSB OK for attic floor?

If your attic joists won’t bear the weight necessary to finish out a living space but the engineer cleared them to support floor decking for light storage, you can install ½-inch plywood or oriented strand board (OSB) in 4-foot-by-8-foot panels over existing 16-inch OC joists.

Is rolled or blown insulation better?

Rolled fiberglass insulation scores an R-value of 3.7. So overall, rolled fiberglass insulation is slightly more effective at blocking in and out heat than its blown counterpart.