You do not necessarily need a mat under a tent. If your tent has its own 'floor', sometimes having a mat under it is a good idea to prevent it from being torn by sharp objects on the bare ground or inside the tent. If it has no floor, and your tent is on sand or gravel, a mat is nice to have because it makes the floor cleaner and more comfortable for bare feet, and may reduce the chance of insect bites.
When choosing a tent sleeping mat for camping, consider features like thickness for comfort, insulation for warmth, weight for portability, size for fitting in your tent, and durability for long-lasting use.
under a mat
I would recommend a self-inflating sleeping mat for a comfortable night's sleep in a tent. These mats provide good insulation from the ground and offer cushioning for a more restful sleep.
To regulate heat inside your tent for a comfortable camping experience, consider using a combination of ventilation, insulation, and strategic placement of your tent. Opening windows or vents during the day can help cool the tent, while closing them at night can trap heat. Using a reflective tarp or insulating mat under your tent can help regulate temperature. Additionally, positioning your tent in a shaded area can help keep it cooler during the day.
I would recommend a self-inflating camping mat for a comfortable night's sleep in a tent. These mats provide good insulation from the ground and offer cushioning for a more restful sleep.
Waterproof layer spread under a sleeping bag in a tent?
gause mat
A lean-to is a building with three sides and a sloping roof. Its use is not primarily to house a tent, but I suppose if it was big enough, then you could set one up under it. Lean-to's are generally small and use for storage or shelter. A tent is shelter, itself; there's no need to build a lean-to around it unless you want to keep the dew/rain off the tent.
palm springs tent 10x30 wedding tent need instructioins
It depends on how tall the tent is.
It slides under the first mat section
under the door mat