Paving is kept at least 150mm below the dpc and slopes away from the wall at around 1:60. This may need to be increased to 1:40 for some ‘difficult to drain’ pavings, such as riven flags, or may be decreased for well-draining pavings, such as blocks or plain concrete.
Simply so, Do you put mortar under DPC? All damp proof courses must be laid between an even, fresh bed of mortar in continuous lengths for the full width of the wall or leaf and preferably project beyond the finished external face of the external leaf.
Should air bricks be above or below damp course? Air bricks may be located either above or below DPC level and where possible on all sides of the building. Ideally air bricks should be located at least 75 mm above hard and soft landscaped areas to reduce the risk of being obstructed or flooded (see diagram 1).
Subsequently, 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.
Can I put decking above damp course?
Can I put decking above damp course? If your decking is going to be an extension of your property, and will be attached to an outside wall, it should be designed so that the top of the deck is at least 15cm below the damp course.
Should bricks be laid frog up or down? Bricks with frogs should generally be laid with the frog uppermost, as this ensures that a full bed of mortar is utilised, creating equal transmission of loading forces through the brickwork outer skin.
Should DPC be bedded?
DPCs should:
be fully bedded on mortar where required by the design, or where the building is over three storeys in height. at ground level, generally be a minimum of 150mm above finished ground or paving level. where intended to prevent rising damp, joints should have 100mm lapping, or be sealed or welded.
How should DPC be laid? Lay the DPC on a full even bed of fresh mortar in one continuous length, for the full width of the leaf. Provide at least a 100mm overlap at any joint or corners. The DPC must not obstruct the cavity. Ensure the external edge of the DPC is visible and not bridged by mortar when completing pointing of the mortar joint.
Can mice get in through air bricks?
Check air bricks are in place and intact. Mice can squeeze through holes no bigger than the diameter of a pencil. If mice can fit through your air bricks then you can prevent this by fitting a wire mesh over them (don’t block them!). Look for access points, typically around gas, electricity and water pipes.
Do modern houses have air bricks? Some modern airbricks are made from plastic which can be more durable and enable a greater rate of airflow. An alternative to airbricks is the use of cast iron grilles, known as air vents.
Why do I have air bricks with a concrete floor?
Why Do Some Homeowners Block The Vents? The air bricks create an airflow underneath the floor; this can lead to drafts that pass through the floorboards into the home. Due to rising energy prices and a desire by many to reduce heating bills, some people choose to block the vents.
How much slope is too much for a patio? Many restaurants set up patios on existing sidewalks with a slope of 2% to a maximum of 5%, which supports the practice that the maximum slope of a patio is 5% or 5/8” per foot. Furniture sitting with the grade may not experience much from a 2% (1/4” per foot) patio grade at all.
Should a 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 much grade should a patio have?
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.
How far away from house should decking be? Deck footing for 2×6 and 2×8 joist should be 16″ (400mm) from the house. Deck footings for 2×10 and 2×12 joist should be 24″ (600mm) from the house. There are several reasons for distance between the house and the deck footings. Space is both for ease of installation as well as strength of deck construction.
Can you deck over slabs?
Many homeowners already have paving slabs on their backyards. But the concern is whether you can install decking over them. Whether you can do it or not depends on many factors. In most cases, however, it’s completely okay to do so.
How much space should be between deck and house?
A proper connection would have a 1/2” to 3/4” gap between the deck construction and the house to allow rain and meltwater from snow to flush through; this prevents rot from forming in the deck timbers, and/or in the adjacent wood of the house framing.
Why do bricks have 3 holes? The holes make the bricks weigh less. 3. Holes allow a consistent heat distribution throughout the brick when it is cooking in the kiln, resulting in a thorough and even cure. 4.
Why do bricks have indentations?
Frogging’ – the familiar (usually pyramidal) indentation in bricks – originates from the ancient Egyptian custom of creating hollows in their Nile-clay bricks, in which they interred live animals (usually infant) as building work progressed.
What are bricks with 3 holes called? Bricks often have two types of holes: core holes and frogs. Core holes are three evenly-spaced holes lined along the center of the brick, much like a hollowed-out traffic light. Frog brick contains one large hole that gives the brick a smooth and recessed look.
Do you put mortar both sides of DPC?
Should be on both sides, but I do know a bricky that only puts it on top of the DPC. It does stick pretty well, it’s not normally a problem when you have corners tends to stop it riding.
Do you use brick ties below DPC? Do not put ties in the DPC course. They should be installed at 450mm c/s vertically and 900mm c/s horizontally and stagger them so that they are not directly in line from course to course.
Does DPM go under or over DPC?
Whilst we are on the subject, it is normal that the DPM overlaps onto the DPC (Damp Proof Course). The DPC is normally laid within the bed joint of the brickwork or blockwork, primarily to stop ground damp from rising up the walls by capillary attraction.
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