Serving WA • OR • ID • MT • AK — MG products also in Canada
Call us: 360-703-2960
MG Sales — Manufacturers' Rep Group

A Building-Envelope Rep Group Built Like a Resource Center — Commercial & Residential

MG Building Supply helps commercial and residential building-envelope manufacturers — roofing included — grow market share across the Pacific Northwest, Alaska, Montana, and Western Canada — through distributor relationships, contractor training, job-site product support, and proven territory development.

What We Do

More Than Relationships. A Marketing Engine for Your Line.

Distributor Development

Counter days, stocking programs, and branch-level relationships that keep your product in front of the buyer.

Contractor Training

Installation demos, lunch & learns, and hands-on product training through MG University.

Job-Site Support

Real answers on real roofs. We show up when a crew has a question, a detail, or a problem.

Territory Development

Six states and provinces of coverage with local knowledge of the wettest roofing market in North America.

Pick Your Path

Who Are You?

Grow market share with a proven roofing rep group — commercial and residential. We give your line trained advocates at the counter, on the roof, and in the spec. See how we onboard, launch, and grow lines in our territory.

Become a manufacturer partner →

Get product support, training, and job-site answers fast. Counter days, stocking guidance, and a direct line to someone who knows the product — not a call center.

Distributor support →

Find the right roofing and building-envelope solution. Browse the line card, get trained, and get job-site support from people who have run crews in this weather.

Contractor resources →

Get product data, specs, and technical support. We connect design teams to manufacturer technical resources and real-world install feedback from the wet side of the map.

Architect & consultant support →

The Line Card

Curated, Not Crowded

We represent a focused portfolio of commercial and residential building-envelope lines that work together on the same roof: sealants and adhesives, membranes and materials, coatings, laminated metal, prefabricated flashings, and MG’s own manufactured products.

Browse the Digital Line Card

The Territory

WA • OR • ID • MT • AK • Western Canada

From Puget Sound to Portland, Boise to Billings, Anchorage to the borders and beyond — our territory covers the markets where wet-weather performance isn’t a feature, it’s the whole job.

Explore the Territory Map

Manufacturers: your Northwest territory shouldn't be an afterthought.

Let's talk about what a focused rep group can do for your line in six states and provinces.

Become a Partner