Build to last. Build Island Tough.
We don't sell the cheapest. We sell what survives here - salt air, sun and storm season - and we have since 1973.
St. Thomas USVI
If it can't take salt, sun and storms, we don't stock it.
Focused product lines for professional contractors and first-time homebuilders - with data sheets and specs for every line.
Lumber
Treated SYP, Douglas Fir, Cypress, MahoganySaltSunStorm
Plywood
Treated, marine, form & cabinet gradeSaltSunStorm
Steel & Rebar
Grade 60 rebar, epoxy coated, mesh, merchant barSaltSunStorm
Roofing
Galvalume, RainGuard, ice & water shieldSaltSunStorm
Concrete & Masonry
Block, Sakrete, Sika, Xypex waterproofingSaltSunStorm
Fasteners & Adhesives
Simpson Strong-Tie, Maze nails, GrabberSaltSunStorm
Windows & Doors
PGT, Jeld-Wen, Lausell, CGI, PlazaSaltSunStorm
Drywall & Ceilings
USG Sheetrock, Durock, Armstrong ceilingsSaltSunStorm
The Brunt family - running MSI since 1973Not the cheapest. The right material for here.
When MSI opened in 1973, lumber was arriving in the territory untreated - and people built with it. We pioneered importing only the highest grades of treated Southern Yellow Pine, and we've chosen every product line the same way since.
Chosen for salt, sun and storms
Every line is selected for the demands of a Caribbean build.
Specs you can check
Data sheets, installation guides and warranties for what we sell.
A family business, 50+ years in
Owned and run by the Brunt family at Crown Bay.
Order by 3. Building by morning.
Phone, email or order online by 3 PM and it is ready the next morning. Weekly runs reach the other islands.
St. Thomas
Island-wide delivery or yard pick-up at Crown Bay.
St. John
Scheduled weekly delivery.
St. Croix
Regular shipments - ask for the next sailing.
BVI
To the ferries; customers arrange carriage with the captain.
Bring us the plans. We'll bring the list.
Take-offs & estimates
Send plans; we'll price the materials list for your job.
Cut, bent & tagged rebar
Fabricated to your schedule and tagged for the crew.
Special orders
Anything we don't stock, quoted within 24 hours.
Job account coding
Purchases coded to each job for clean billing.
WebTrack online account
See orders, invoices and statements any time.
Job-site visits
Outside sales staff come to your site to help plan the order.
Put it on the account.
Two credit options plus a cash rewards card.
- Commercial credit for contractors
- Personal credit for homeowners
- Advantage Card - Building Bucks on every purchase
Building supplies next door to your hardware store.
MSI Building Supplies
- Address
- 3814 Crown Bay, St. Thomas, USVI 00802
- Phone
- (340) 776-8800
- Mon - Fri
- 7:30 AM - 5 PM (warehouse 8 - 4)
- Saturday
- 7:30 AM - 2:30 PM
- Sunday
- Closed
Sea Chest Ace Hardware
- Address
- 3806 Crown Bay, St. Thomas, USVI 00802
- Phone
- (340) 774-0495
- Mon - Fri
- 7:30 AM - 4:30 PM
- Sat - Sun
- 8 AM - 2 PM
From the yard.
Save your roof for less than $1,000
Simpson Strong-Tie hurricane clips can be retrofitted to most older homes.
In this case, more is less
Why we only stock two-cell 6" and 8" block.
Phantasea Tropical Botanical Garden
A builder's garden on the North Side, built with MSI materials.
It only takes one.
Hurricane season runs June 1 - November 30. Work through the checklist before the cone points at us.