Quick Answer: How Thick Should Attic Floor Be?

Can you overload an attic?

Some attics do not have a full floor, and heavy objects could eventually fall through drywall, compromising your ceilings, and endangering the household members who are living under the attic space.

Even when flooring is present, avoid overloading any areas to ensure safe storage..

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 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.

Can you walk on loft boards?

For easier movement in the loft, we recommend using walk boards (also known as crawl boards) laid across the joists. … These walk boards can be lifted and moved as you work around the loft.

How do I floor an attic for storage?

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.

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.

How thick should Loft Flooring be?

Standard loft boards come in two different sizes; 2,400mm x 600mm and 1,220mm x 320mm; both of which are 18mm thick. Remember to make sure that the boards you decide on will actually fit through your loft hatch!

Can attic floor support weight?

Floor Framing The floor structure of an attic is also the framing for the ceiling beneath it. This is made up of ceiling joists, typically 2×6 or larger boards. … The joists should support your weight, but the space between them almost certainly will not.

Do you need permission to board a loft?

There is generally no need for planning permission when fitting a roof window, installing a loft ladder, fitting loft insulation or boarding a loft for storage. However you cannot use your loft as a room for ‘general use’ without Building Regulations (and Planning Permission may also be required).

Can you board straight onto loft joists?

You can still board directly on to the joists if you want, but it is worth noting that this would not pass a building control inspection, because you wouldn’t have the full 270mm depth of insulation required by regulations. Whatever you do, make sure you put as much insulation beneath the boards as possible.

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.

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 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.

Can my attic support a floor?

Flooring the attic. An 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.

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