Best current price£480.00from B&Q
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B&Q£480.00Visit shop - 215mm Hollow Dense Concrete Block 7.3N (X100 Blocks)
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Homebase£518.00Visit shop Hollow Dense 215mm 7.3N Concrete Block 100 Pack
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The B&Q Hollow Dense Concrete Block 7.3N is a heavy-duty masonry solution ideal for professional contractors and serious DIY builders engaged in structural projects. Its primary advantage is the combination of high load-bearing capacity and a hollow-core design that makes manual handling more manageable, though its weight still requires careful logistical planning for large-scale sites.
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Yes, they are suitable for use both above and below the damp proof course (DPC).
These blocks have a compressive strength of 7.3N/sqmm.
Yes, they are suitable for party wall construction as they provide the necessary structural and acoustic properties.
Yes, the hollow cores are designed to accommodate vertical steel reinforcement or insulation materials.
This product is supplied in a 100-pack configuration.
A standard masonry saw with a diamond blade is recommended for accurate, clean cuts.
Use a spirit level for every block laid and ensure your line pins are tight to maintain a straight, level guide.
Ensure the mortar mix ratio is correct and that blocks are not overly dry; lightly dampen the blocks if the weather is extremely hot to prevent them from wicking moisture from the mortar.
Proper installation begins with a clean, level foundation. Ensure your DPC is correctly positioned before laying the first course. When cutting these blocks, use a mechanical block saw with a diamond blade to ensure clean edges and minimize waste.
For compatibility, these blocks work well with standard Portland cement-based mortars. If you are using the voids for thermal insulation, ensure the material selected is moisture-resistant if the wall is situated below ground level. Store these blocks on a level, dry surface and cover them with protective plastic sheeting to prevent saturation before use, as excess moisture can affect mortar adhesion during the laying process.
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