What size trim a slab do I need?

Use 3/4″ Trim-A-Slab for gaps from 5/8″ to 7/8″ wide. In some cases, slab motion may have been significant, opening up slab gaps to 1″ or more. Trim-A-Slab 1″ is best suited for these applications, and it accommodates gaps from 7/8″ to 1-1/8″. 1″ Trim-A-Slab comes in up to 25′ continuous lengths.

What size Trim-A-Slab?

Trim-A-Slab is available in sizes to fit any gap from 3/8" wide, up to 1-5/8" wide. As each size is highly compliant, allowing for +/- 1/8" of variation, only 4 sizes are needed for this entire range of gaps.

What can you put between concrete joints?

Expansion joints must be sealed with a flexible sealant, like QUIKRETE® Self-Leveling Polyurethane Sealant or QUIKRETE® Non-Sag Polyurethane Sealant…or an expansion joint strip, to prevent water from penetrating the joint and deteriorating the sub-base.

How big can a concrete slab be without expansion joints?

Rule #1 – Keep joints as square as possible. Rule #2 – In order to prevent intermediate cracking, space joints (in feet) no more than 2 – 3 times the slab thickness (in inches).

Is trim a slab paintable?

Trim-A-Slab can be painted, however, we cannot warrant Trim-A-Slab if you do. If you want to paint anyway, we recommend that you try it on a sample, and see how it reacts and how well it adheres.

Sizing Guide and Template Use for Trim-A-Slab

What kind of wood is used for concrete expansion joints?

Cedar Expansion Strip in Concrete.

What are expansion joints for concrete?

What is a concrete expansion joint? A concrete expansion joint – or control joint – is a gap which allows the concrete to expand and contract as/when the temperature changes. It forms a break between the concrete and other parts of a structure to allow movement without causing stress, which can lead to cracking.

Should concrete control joints be caulked?

Caulking Concrete Cracks and Expansion Joints

Caulking the joints and cracks is the best way to stop this from happening. Even expansion joints in your concrete driveway should be caulked. They can be the biggest culprit of water under your slabs.

How do you cut a slab gasket?

SlabGasket cuts easily with sharp garden pruning shears, a sharp pocket knife, or a box cutter.

What should I put between wood and concrete?

Anyplace where wood meets the ground or concrete, the lumber must be pressure treated. For additional moisture protection, a gasket or strip of closed-cell foam can be installed between the concrete foundation and the sill plate.

How do you seal a gap between concrete and house?

Seal cracks in concrete with durable urethane caulk. It'll keep water out and protect your foundation and walks from further cracking and eroding. You can do it in less than a half hour.

When should you use expansion joints in concrete?

Expansion joints are put in place before the concrete is poured. Expansion joints are used to allow the slab to move and not put stress on whatever it abuts. These joint are placed where a slab meets a building, where a slab meets another slab, and where a pool deck meets the coping.

How long does it take for slab caulk to dry?

Use on horizontal concrete, stone or brick surfaces that have cured for at least 4 weeks. Keep foot and vehicle traffic off the sealant for a minimum of 24 hours after application. (Wait 48 hours in humidity above 50% and/or cooler temps below 50°F.)

Should I fill concrete expansion joints?

After a joint is established, it needs time to activate as the slab cures. Ideally after 90 days, the joint should be filled or sealed. Joint filling is done the full depth of the joint while sealing is only done over the surface level with a flexible material over a rod to help keep the proper shape of the joint.

What is the best caulk for concrete?

One of the best uses for silicone caulk involves filling the gaps between concrete and other materials, such as brick, wood or metal. Silicone caulk adheres well to all of these materials, and because it has elasticity, it won't crack or break when materials like wood expand in response to environmental conditions.

What should I put between patio slabs?

When you're laying a new patio, you can fill large gaps between patio pavers with either regular sand, a DIY mix of concrete and sand, or polymeric sand. These can be applied using a trowel and packed down with a screwdriver, then finished by brushing over the gaps with a broom.

Do I need to leave a gap between paving slabs?

Ideally it wants to sit 15mm in the mortar. Repeat this process, leaving a 10-15mm gap between each paving slab, until your patio is covered. Once you've laid your patio, spray the whole area with water until it's completely saturated, and leave it to set for at least 24 hours.

What size slab needs control joints?

CONTROL JOINT SPACING

Space joints (in feet) no more than 2-3 times the slab thickness (in inches). A 4" slab should have joints 8-12 feet apart. When arranging joints, skilled contractors will often use them to create an attractive diamond pattern.

Should I saw cut my concrete slab?

Saw cuts are a used to create control joints in concrete, which help control where cracking occurs due to shrinkage. The cuts should be made at a predetermined spacing and only after the concrete has obtained sufficient strength but before internal cracking begins. Therefore, the timing of saw cuts is critical.