About 70 to 80 degrees should do it.
Do rugs flatten by themselves.
To avoid damage try another way.
Unrolling the rug.
Once you unroll the rug.
Usually one or two hours in the sun is enough to release wrinkles.
How to flatten an area rug that has been rolled up.
Roll the edge of the rug up and place the backing on it.
Most people want it to lay flatter faster.
Lay the rug back down and press the edges into the floor.
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.
Step 4 cut a strip of rubber backing for rugs using a pair of scissors.
Spread the rug over a clean concrete or asphalt slab such as your driveway on a sunny day.
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.
Run the iron over each corner of the rug to help flatten the edges.
If the corners curl up place heavy books or objects on them for several days.
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.
If your rug still won t lie flat apply some heat to it.
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.
Since rug bumps and folds are usually caused by stretching dampening the edges of your rug should flatten it.
Alternatively you can lay the rug upside down in high heat whether that s provided by sunlight or your thermostat.