It s best to do this in the afternoon on a 75 to 80 degree f day giving the surface time to absorb the sun s heat all morning.
Do rugs flatten by themselves.
To avoid damage try another way.
Step 1 take either the steamer or the wet sponge towel and dampen the edges of the unrolled rug.
Lay the rug back down and press the edges into the floor.
Step 4 cut a strip of rubber backing for rugs using a pair of scissors.
Run the iron over each corner of the rug to help flatten the edges.
About 70 to 80 degrees should do it.
A new area rug or one that s been rolled up and tucked out of the way for a while gets used to its rolled shape over time.
Purchasing a new rug can be exciting as you give one room a partial makeover just by setting the rug on the floor with little effort required.
Unrolling the rug.
How to flatten an area rug that has been rolled up.
Since rug bumps and folds are usually caused by stretching dampening the edges of your rug should flatten it.
Spread the rug over a clean concrete or asphalt slab such as your driveway on a sunny day.
Alternatively you can lay the rug upside down in high heat whether that s provided by sunlight or your thermostat.
Usually one or two hours in the sun is enough to release wrinkles.
Roll the edge of the rug up and place the backing on it.
Allow this to dry this way and see if it helps.
Once you unroll the rug.
Most people want it to lay flatter faster.
Of course over time the rug will eventually flatten out on its own but that is assuming that you don t continually fold that edge over from stepping on it.