Home Improvement

Does a patio need drainage?

A drainage system for your patio will help preserve your patio AND protect your home. Water that collects and pools near the foundation will cause damage to its stability. Over time, this water exerts pressure on your foundation, pushing it inward and creating cracks.

How do you provide drainage for a patio?

The best way to prevent patio drainage problems is to plan for them when the slab is installed. If your landscape prevents you from pitching the patio to allow for natural water runoff, your concrete contractor can install an in-slab drainage system with gravel-filled channels to carry the water away.

Where should patio drainage be placed?

So we dug a small line from the downspout. Because all this water's just filling up the yard. And we're just cleaning the trench out. You can see we still have a great flow of water coming from the

Do you need a drain with pavers?

A paver patio that does not have proper drainage could result in erosion, foundation damage to your home, and a risk of insect proliferation.

Can a patio slope towards house?

Whenever possible, a pavement should slope away from a building. This is done to prevent surface water ‘hanging’ against the masonry of a building, which could lead to problems with damp. However, this is not always possible.

How far should patio be below damp course?


The Building Regulations require at least 150mm between the dpc and the ground or any paving. This is what is known as ‘Best Practice’. However, there are situations where it is just not possible, or practical, to maintain this regulation.

How much should a patio slope for drainage?

The standard slope for proper concrete drainage is a one-quarter inch drop for every foot of length. So, to calculate the difference in height between one end of a patio or walkway and another, simply multiply the length by one-quarter.

Should your patio slope away from the house?

The correct patio slope will help keep water from sitting on it or backing against your house. Patios within 10 feet of a foundation must have a 1/4” per foot or 2% fall away from the building. The 2% fall or slope is required for hardscape surfaces such as pavers, wood, concrete, gravel, or other materials.

What should the fall on a patio be?

All of the paving slabs will need to be laid with a slight slope, around a 1 in 80 fall. This is so that pools of water don’t form on the surface of your patio. That means that for every 80cm your patio should fall by 1cm. The fall may vary dependent on the size of your patio but this is the optimum level.

Should patio be level or sloped?

A patio should slope away from the house at the rate of 1/8″ (3mm) per running foot. Generally, a 4″ (100mm) thick slab set 2″ (50mm) above ground level is suitable. To ensure that the height and slope are correct, begin the excavation, layout and form construction where the patio meets the house.

Does a patio need to be level?

Your patio should be at least level, but generally between . 5″ and 1.5″ above grade. This provides adequate distance so that creeping grasses will not crawl onto your patio and dirt will not wash onto your patio during heavy rains or foot traffic.

How much slope is too much for a patio?

Keep in mind that the slope should be at least 1 inch for every 8 feet of the paver patio. For instance, a 16-foot patio will require 2 inches of the slope while a 12-foot patio will require 1 1/2 inches of the slope.

Can you lay a patio on a slope?

The standard for building a patio is to create a 15mm slope for every one and a half metres of patio space. This slope is essential for patio drainage when the surface of the patio is not permeable. Water can then successfully run down the slope and drain away, instead of settling in the middle of the patio.

Can my patio be flat?

The patio must be perfectly level, and it shouldn’t have any irregularities, dips or bumps. Making the patio flat isn’t the same as making it level. If the patio is perfectly level then pools of water will remain on it after rain or spraying it clean. The patio should therefore always have a slight slope.

How do you install a patio with uneven ground?

  1. Step 1: Assess the Ground. Assess the terrain for a patio. …
  2. Step 2: Fix Underlying Issues. Replace any leaky drain pipes. …
  3. Step 3: Consider Retaining Walls. …
  4. Step 4: Excavate the Area. …
  5. Step 5: Install Landscape Fabric. …
  6. Step 6: Add Base Gravel and Sand. …
  7. Step 7: Install the Pavers. …
  8. Step 8: Fill the Gaps.
  9. How do I build a patio on a slope?

    Level check the depth of the edge using a tape measure compact. The soil with a vibrating plate compactor and recheck the overall debts and slope of the area using four pegs and spirit.

    What is the cheapest way to lay a patio?

    Concrete is one of the cheapest and most popular materials that can be used to build a hard-surface patio. The aggregates of concrete can be stone, gravel, sand, or shells, which are mixed with water to form a paste that dries into a hard surface when left to settle.

    Can you lay slabs on soil?

    While it is possible to lay paving slabs on soil, it is not generally advised. The durability of any paving with a soil base can depend on many factors, including: Type of soil: Heavy clay soil will be far more durable and less likely to be compromised by British weather conditions.

    What is a patio sub-base?

    The sub-base is the main load-bearing layer of paving construction. A well-designed sub-base should evenly spread the load of traffic, whether pedestrian or vehicular, down to the sub-grade, also known as the formation level.

    Does a patio need a sub-base?

    What’s crucial to patio laying success is a sub-base to provide the support paving slabs require. You’ll need a sub-base, which is the main load-bearing layer of your patio. The best sub-base for a patio is hardcore laid to the correct depth, along with a binding layer of sand.

    How deep should a patio base be?

    about 150mm

    The recommended depth you’ll want to dig to is about 150mm or 6 inches from the finished patio level. You can use a tape measure to check your depth is correct and once you’re happy you can compact the soil using a Vibrating Plate compactor, also known as a Wacker Plate.