is there a type of tarp paper to put under the gravel to prevent sinking gravel?

Answer 1

Geotextile, You canget it at a supply house which caters to excavation contractors.It does not so much keep gravel from sinking, It keeps the earth underneath from coming up through the gravel when its wet.

Answer 2

landscape fabric will help, but only help.

i found at my own house what i needed to do was actually make it so the rocks couldnt sink. what i did was make the area harder for the rocks to sink. i put down about an inch and a half of stone dust, and compact it.

i put down the land scape fabric, then the stone dust, compacted the dust, then put down another layer of fabric, then the pea gravel. so far havent had a problem been down for about a year and a half.

Answer 3

http://www.thepondwarehouse.com/store-categories-Pond-Liner-Underlayment_1923203.html
Underlayment
Product #: FPU
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Using this will keep away the weeds as well.
I personally use it under my liner in garden pond but this year we need more gravel so we will put this down first to keep out the weeds.
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Description: This six ounce nonwoven

geo-textile

fabric comes in three roll widths — 5', 10' and 15' wide! This makes it easy to match up to the EPDM liner which is sold in 5' wide increments.

Using underlayment under the liner provides additional tear and puncture protection from roots, stones or any other sharp objects. Underlayment also provides an enhanced soil stability
and erosion control.

Price per Square Foot:
5', 10', or 15' wide x any
length = $ .18 per square
foot

Answer 4

Landscape cloth sold at garden centers in large home improvement stores.