6 min read
Top 7 Common Repointing Mistakes and How to Avoid Them
Over-face smearing, feather edging, ribbon pointing, trap moisture profiles, and over-strong mortar formulations. Protecting building longevity.
Masonry Pointing & Mortar Guides
Authoritative technical guides on repointing brick, block, and stone walls, measuring joint depths, and calculating mortar quantities.
6 min read
How to Calculate Repointing Material Budgets: Sand, Lime, and Pre-Mix
Translating net cavity cubic metres into bulk bags of aggregate, 25 kg binder bags, or premixed mortar tubs. Waste contingency budgeting.
6 min read
How to Estimate Mortar for Standard UK Metric Brickwork (215 x 65 mm)
Detailed mathematical breakdown of mortar volume requirements for UK metric bricks per BS EN 771-1, joint density factor, and waste allowance.
6 min read
How to Measure and Calculate Joint Run for Stone Walls and Irregular Masonry
Practical guide to surveying irregular rubble, dressed ashlar, and random fieldstone elevations using linear sampling and wheel tracing.
6 min read
How to Rake Out Mortar Joints Without Damaging Masonry Arises
Hand plugging chisels vs oscillating multi-tools vs mechanical diamond rakers. Protecting delicate brick arises during joint prep.
6 min read
Lime Mortar vs Ordinary Portland Cement for Pointing Historic Brickwork
Vapor permeability, compressive modulus, and the sacrificial mortar principle. Preventing catastrophic brick spalling caused by hard Portland cement.
6 min read
The Complete Mortar Waste Allowance Guide: Droppings, Voids, and Compaction
How to select the right waste percentage: 5% for experienced trade on smooth blockwork, 10% standard brickwork, up to 20% on rough stone.
6 min read
Natural Hydraulic Lime (NHL) Grades Explained: NHL 2 vs NHL 3.5 vs NHL 5
Standard classifications per BS EN 459-1. When to specify feebly hydraulic NHL 2, moderately hydraulic NHL 3.5, or eminently hydraulic NHL 5.
6 min read
Estimating Pointing Mortar for Standard Concrete Blockwork (440 x 215 mm)
Mathematical derivation for large aggregate block coursing per BS EN 771-3. Only 4.94 m of joint per m² compared to 17.19 m on brickwork.
6 min read
Repointing Depth Rules: Why the 2x Joint Width Rule Matters
Why shallow pointing fails within two seasons. Engineering mechanics of mechanical interlock, frost heave, and minimum 15-20 mm raking depth.
6 min read
Repointing Historic Imperial and Reclamation Brickwork (Nominal 9 x 2⅞ Inch)
Handling pre-1970 imperial masonry coursing per BS 3921. Calculating density differences (~50 bricks/m² vs ~59 bricks/m²) and aggregate matching.
6 min read
Weather and Temperature Limits for Pointing: Protecting Mortar from Frost and Sun
The critical 5°C working threshold, damp hessian curing techniques, preventing rapid drying shrinkage, and seasonal timing for lime mortars.