The sky's the limit

Article Abstract:

Algae-resistant shingles have emerged as a favorite residential roofing product by both consumers and roofing contractors. The minimal to sometimes dangerous problem posed by algae staining in the US has led to 30 years of research by Minnesota Mining and Manufacturing Co. That research concluded with asphalt shingles using metals to prevent staining, particularly with Gloecapsa magma, the main algae type found on roofs.

Sales & consumption, Cut Stock, Resawing Lumber, and Planing, Shingles, Cooperage & Excelsior, Wood products

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Working all the angles

Article Abstract:

DeWalt, Makita, Milwaukee and Rigid brands of right-angle drills were compared in terms of their physical features, handling and performance in two classes; heavy-duty and medium-duty. All of the right-angle drills are built with durable clasps and handles. The drills rate from 13 amps and turning at 450 and 1,750 rpm to a moderate 7 amps at 400 rpm. Other findings of the performance test are presented.

Electric drills, Product/service evaluation, DeWalt DW120K (Drill), DeWalt DW124K (Drill), Makita DA4000LR (Drill), Makita DA4031 (Drill), Milwaukee 0721-21 (Drill), Milwaukee 1680-21 (Drill), Milwaukee 3107-6 (Drill), Ridgid R7130 (Drill)

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