Best Answer

Concrete Hello, before you go filling a large hole with concrete, think about a few things: 1. that could be quite costly. 2. concrete has a density roughly in the range 2300kg/cu.m. to 2450kg/cu.m. Water has a density of 1000kg/cu.m. You might be increasing the load beyond what the foundations were designed to take. This could be dodgy for services passing near or under the pool. It might also be dodgy for buildings that share a foundation. Your poolside surface may also be affected by cracking. 3. Filling the pool to 500mm from the top with inorganic construction spoil, then 400mm of a quarry run gravelly sand compacted in two layers and 100mm of concrete with a mesh reinforcement 65mm from the top may work. Alternatively go 600mm from the top with spoil, 300mm with quarry run and 300mm of topsoil, which could be landscaped. It all depends on site conditions and what you want to achieve with the final look. MOST IMPORTANT. Get advice from a local professional, apart from technical issues, there will probably be planning and environmental issues with your local authority. Do consult a professional with indemnity insurance, probably a civil engineer . Your national engineering council will help, if you do not know anyone. They should be available with a quick search. By the way do not even think about suing me for that advice, unless you want my mortgage, my cat and my lab boots. Best of luck.

User Avatar

Wiki User

2007-03-20 12:59:23
This answer is:
User Avatar
Study guides

Is hair perm lotion an acid

How do you adjust the pH level of pool water

Is sodium carbonate the same as sodium bicarbonate

How do you raise PH level in a swimming pool

See all cards
18 Reviews

Add your answer:

Earn +20 pts
Q: With what materials do you fill your 9 foot deep in-ground pool to permanently close it?
Write your answer...
Still have questions?
magnify glass
Related questions

What are the town of Brookhaven in Suffolk county NY codes for inground swimming pools?

how deep can i put a semi inground pool

How much water is in a 20' x 40' inground pool?

This depends on how deep it is.

Can dogs put a hole in the deep end in the vinyl lining of an inground pool?

It is highly unlikely.

How many gallons of water in a 18x36 inground pool?

It depends on how deep it is. But probably around 30,000 gallons

How many gallons in an inground swimming pool that is 40 by 20 with the shallow end being 3ft deep and the deep end being 9ft deep?

just under 40,000 gallons

Can an inground pool be 17 feet deep?

An unground pool can be 17 feet deep if you really want it to be. You must follow certain safety rules with a pool of this depth though.

What if your inground pool is empty and you have 3 feet of water and mud in the deep end of the pool. How do i clean it out frustrated.?

Usa a shop vac.

If it is 80 degrees and breezy what temperature should an inground six-foot deep pool be?

At least 20 degrees lower than the air temperature.

Minerals can form deep inside earths crust by?

Minerals can form deep inside the Earth's crust by crystallization of melted materials.

How much does an inground swimming pool cost?

If you want to put in an inground swimming pool, expect to pay at least $20,000 for most basic models. $20,000 to $30,000 is the typical cost. For pools that are very deep or large, or customized, prices can easily reach $50,000.

Do jellyfish live close to the surface or deep in the sea?

close to the surface

How many gallons of water are in an area 20 feet wide by 40 feet long and 2 feet deep?

12,000 us gal. Inground pool?

People also asked