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To install a floated subfloor system, first place a layer of plywood subfloor panels with the edges parallel to the wall. Use a ¾” spacer between the plywood and the wall and a 1/8” spacer between panels. Next, lay a second layer of plywood at a 45-degree angle to the first layer.
Can you put plywood over concrete slab?
If you’re installing plywood over an existing dry concrete floor, you shouldn’t have any problem. However, a new concrete floor contains a lot of moisture. The moisture level of the concrete should be down to 5.5% before attaching the plywood subflooring.
How do you plywood a concrete floor?
One way to attach plywood to a concrete surface is to screw it into place with concrete fasteners. Another way that involves less strain and hard work is to glue the plywood to the concrete. This only requires a few materials and will adhere the plywood very securely in place.
Can you put a subfloor over concrete?
You need a dry, clean and flat surface before you can install finished flooring in a room built on a concrete slab. One of the simplest options is a sleeper-based subfloor. The result is a subfloor that protects finished flooring from cold and damp concrete-based floors.
Do I need a subfloor over concrete?
If you don’t plan to use the space, there is no need for a subfloor or floor covering. Concrete or tile-over-concrete are acceptable floors for uninhabited basements. But to install any kind of floor covering—engineered wood, laminate, carpeting—basement subflooring is highly required.
Do I need a vapor barrier between concrete and wood flooring?
Do I need a vapor barrier for hardwood floors?” The answer is YES! Moisture can destroy hardwood flooring. It causes cupping, warping, and even mildew if not treated. You must install a moisture barrier to protect your flooring from water wicking up from below.
Can you put a wood floor over concrete?
If you have a concrete slab main floor or basement, you may be wondering if it’s possible to install hardwood flooring directly on top of the concrete. The short answer is yes.
Does plywood stick to concrete?
Some concrete contractors extend the stick-resistant life of the plywood by using a refresher coating of a commercial release agent or a solvent-thinned linseed oil.
Can you lay OSB on concrete floor?
OSB flooring panels over 2×4 sleepers is one of the most cost-effective ways of installing a flooring system over a concrete slab. Sleepers can be installed so that they are level, thus overcoming flaws in the concrete slab and providing a straight, even surface on which to place the flooring system.
What underlayment should I use on concrete?
With a concrete subfloor, you will need an underlayment that acts as a vapor barrier in order to prevent moisture from penetrating through to your laminate installation. The normal choice is a thin foam pad material made of polyethylene or polypropylene, which rolls out in sheets.
How do you attach plywood to a concrete wall?
Apply a layer of construction adhesive with a caulk gun to the back of the plywood. Lean the plywood against the concrete block, making sure the wood is where you want it as the glue dries. Use 2-by-3 lumber to brace it in position as the adhesive sets.
How do you install subfloor over uneven concrete?
6 Ways To Fix Uneven Subfloors Or Concrete Slabs Use Self-Leveling Concrete/Underlayment. How to Self Level Concrete Floors Like Pros – Self Leveler. Install A Flooring Underlayment. Grind Or Sand The Subfloor. Replace The Subfloor. Fix Your Floor Joists. Stabilize Your Foundation.
Do you need a vapor barrier under a concrete slab?
Exterior concrete slabs or those in unheated structures don’t require a vapor retarding barrier. However, if the surface will be sealed with an impermeable membrane or product, there should be a vapor barrier under the pad.
What should I put between wood and concrete?
The wood will soak up the moisture from the concrete and the wood will rot. Pressure treated wood is more resistant to rot but over time, it will have the same effect. It’s best to always have a barrier, a thin plastic foam sheet called “sill seal”, between concrete and wood.
Do you put moisture barrier under subfloor?
Vapor Barrier Within a Crawl Space Besides having a vapor barrier on top of the subfloor, it may be necessary to have it under the subfloor when the subfloor is over a crawl space. Not only will you have to replace your hardwood flooring and subfloor again but you will also have to fix the crawl space moisture issue.
Do you need underlay for solid wood flooring on concrete?
It is important to mention that you do not need a wood floor underlay when you have a solid hardwood floor and that’s because it is not stable, hence it has to be installed mechanically to the concrete subfloor.
What kind of wood floor can you put on a slab?
Solid parquet hardwood flooring can be glued directly to a concrete slab on grade or above grade with the use of a manufacturer recommended vapor retarder. Solid parquet should not be installed below grade.
What kind of wood floor is best on concrete?
According to flooring experts, the best kind of wood flooring to use with a concrete subfloor is a floating engineered wood floor. This kind of floor performs well, resists moisture and is easy to install. It is also inexpensive, which is a benefit for homes.
